The wavelength fringe is 0.431 m.
Diffraction grating with split space d, to find the fringe position ym, we must to find the angle from
d Sinα = mλ
A grating with N slits or lines per mm has slit spacing of
d = 1/N
d = (1/600mm)
d = 1.67×10⁻³mm
For 400nm wavelength:
α = Sin⁻¹(mλ/d)
α = Sin⁻¹(400*10⁻⁹/1.67*10⁻⁶)
α = 13.910°
And the position of first order lowest wavelength fringe on the screen is:
y₁ = L.tanα
y₁ = 2tan(13.910)
y₁ = 0.49445 m
For 700nm wavelength:
α = Sin⁻¹(mλ/d)
α = 24.83°
And the position of first order highest wavelength fringe on the screen is:
y₂ = L.tanα₂
y₂ = 0.925595 m
The difference between the first order lowest and highest wavelength fringe is
Δy = (0.925595 - 0.49445)m
Δy = 0.431m
Therefore, the wavelength fringe is 0.431 m.
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[NOTE: THIS IS AN INCOMPLETE QUESTION. THE COMPLETE QUESTION IS: White light (400–700 nm) is incident on a 600 line/mm diffraction grating. What is the wavelength of the first-order rainbow on a screen 2.0 m behind the grating?]
You and a friend are pulling on a rope in opposite directions as hard as you can. What is the equal and opposite force for the force of your hand pulling on the rope as described by newton's third law?.
The equal and opposite force is the force of your friend's hand pulling on the rope in the opposite direction.
Equal and Opposite Forces in Tug-of-WarAccording to Newton's Third Law of Motion, for every action there is an equal and opposite reaction. In this case, the action of your hand pulling on the rope creates an equal and opposite reaction of your friend's hand pulling on the rope in the opposite direction. This creates a tug-of-war situation, where the two forces are in equilibrium and the rope does not move. This is what Newton's Third Law is all about - that two forces are always equal and opposite.
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describe the nucleus of comet churyumov-gerasimenko. what are the white streaks or plumes that emanate from its surface? what will eventually happen to the comet if the streak-forming process continues?
This feature of a comet develops when the celestial body passes close to a star such as the sun. The ice around the nucleus of the comet sublimates forming the coma around the comment (when hit by light photons as observed from the earth). The tails are also formed by the ice being pushed a bit behind the comet by light pressure.
When the comets gets near the sun, they get heated up. The white fumes seen on the comet are actually the burning sensations of the sun. When the comet gets near to the sun, the hot fire catches up the comet and the fumes are born on it.
The same happens when a meteor or a comet enters the surface of the earth.
Therefore, when they enter the surface of the earth, they tend to come in contact with the gases present in the atmosphere with great speed which makes those astronomical bodies turn into a globe of fire.
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a certain heat engine is 25% efficient. how much exhaust heat is produced as this engine does 600 j of work?
Heat engines are engines that convert heat energy into mechanical energy.
If the efficiency of engine is = 25%
Then to calculate the input energy,
25 % X 600 = 150J
The efficient utilized energy is 150J
and the energy which is expelled as waste heat is
= 600J - 150J
= 450 J
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What is the time period of a wave with a frequency of 200hz?
Answer:
Frequency=200Hz Time Period=1/Frequency =1/200=0.005sec.
Explanation:
What is the image of G for a dilation with center 0 0?
The image of G for a dilation with center 0 0 is G(1,-3).
Dilation is the process of changing the size of an object or shape by shrinking or enlarging its dimensions by some factor. For example, a circle with a radius of 10 units will shrink to a circle with a radius of 5 units. Applications of this method are used in photography, crafts, creating logos, etc. Geometry has four basic transformation types.
RotateTranslateReflectionResize or StretchIf the scale factor is greater than 1, the image will be stretched.If the scale factor is between 0 and 1, then the image shrinks.If the scale factor is 1, then the original image and the image produced are congruentPoint G lies 1 on the X-axis and -three on the Y-axis.
when the size component is 1, the photograph stays similar to its pre-image.
Dimensions of the authentic plotted factor x Scale thing = Dimensions of
the brand new plotted factor
(1,-3) x1 = (1,-3).
After the dilation, pre-photograph image has gone through the transformation
the subsequent way. G(0,0)→ G(1,-3)
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the density of aluminum is 2700 kg/m3. if transverse waves travel at in an aluminum wire of diameter what is the tension on the wire?
The tension on the wire is 52.02 N.
From the question, we have
Density of aluminum = 2700 kg/m3
Area,
A = πd²/4
A = π x (4.6 x 10⁻³)²/4
A = 1.66 x 10⁻⁵ m²
μ = Mass per unit length of the wire
μ = ρA
μ = 2700 kg/m³ x 1.66 x 10⁻⁵ m²
μ = 0.045 kg/m
Tension on the wire = √T/μ
34 = √T/0.045
34² = T/0.045
T = 52.02 N
The tension on the wire is 52.02 N.
Complete question:
The density of aluminum is 2700 kg/m3. If transverse waves propagate at 34 m/s in a 4.6-mm diameter aluminum wire, what is the tension on the wire.
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transmission electron microscopes that use high-energy electrons accelerated over a range from 40.0 to 100 kv are employed in many applications including the study of biological samples (like a virus) and nanoscience research and development (alloy particles and carbon nanotubes, for example). what would be the spatial limitation (in pm) for this range of electrons? it is often true that resolution is limited by the optics of the lens system, not by the intrinsic limitation due to the de broglie wavelength.
Picometer's spatial constraints for the specified range of electrons would be roughly 50 picometers.
What exactly is a transmission electron microscope (TEM)?
A transmission electron microscope (TEM) is a type of microscope that produces precise pictures of the structure of materials at the atomic or molecular scale using a beam of high-energy electrons. A focussed beam of electrons is sent through a tiny sample and the transmitted electrons are collected on a fluorescent screen or an electronic detector.
As per the problem:
The spatial resolution of the TEM would be hundreds of nanometers at the lower end of the energy range of 40.0 kV. At the upper end of the range (100 kV), the spatial resolution would be in the tens of nanometers.
In general, TEMs with electron energies ranging from 40 to 100 kV are capable of discerning features as small as 50 picometers (pm). The actual spatial resolution, however, will be determined by a number of criteria, including the quality of the electron optics, the stability of the electron beam, and the sample preparation.
It's worth mentioning that TEMs with considerably greater electron energies (up to several hundred kV) are available, allowing for spatial resolutions as low as one angstrom (less than 0.1 pm).
The method of transmission electron microscopy (TEM) is used to examine the characteristics of incredibly small specimens. Scientists can now see aspects like structure and morphology thanks to technology that accelerates an electron beam through a very thin specimen.
How does TEM work?
Transmission electron microscopes (TEM) are types of microscopes that provide an image that is greatly enlarged while viewing specimens using an electron particle beam. TEMs have a 2 million-fold magnification capacity.
What are the three different TEM types?
A TEM typically has three steps of lensing. The projector lenses, objective lenses, and condenser lenses make up the stages.
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a small rock with mass 0.12 kg is fastened to a massless string with length 0.80 m to form a pendulum. the pendulum is swinging so as to make a maximum angle of 45 ∘ with the vertical. air resistance is negligible.
A) The rock moves at 2.1 m/s when the string passes through the vertical position. (B) 0.83 N of string tension is present when the angle is 45 degrees. (c), the string is under 1.867 N of tension as it passes through the vertical position.
We are given that,
Mass = m = 0.12kg
String length = l = 0.80m
The maximum angle = θ = 45°
a) To determine the rock's speed when the string is in the vertical position, we have
using the first principle of thermodynamics
Kinetic energy = potential energy
1/2×m×v² = m×g×l×(1-cosθ)
v² = 2×g×l×(1-cosθ)
v² = 2×9.81×0.8×(1-cos45) = 4.597
v = √4.597 = 2.1 m/s
(b) The tension in the string at a 45° angle to the vertical is determined by in order to maintain equilibrium between tension and rock mass, ∑Forces = 0,
T - m×g×cosθ = 0
T = m×g×cosθ
T = 0.12×9.81×cos45
T = 0.83 N
(c) The string's tension as it crosses the vertical as we cross the vertical,
T = m×g + (m×v²)/r
T = mg(1+2(1-cosθ))
T =0.981 × 0.12 (1+ 2(1-cos45))
T=1.867 N
The given question is incomplete , complete question is given below,
A small rock with mass 0.12 kg is fastened to a massless string with length 0.80 m to form a pendulum. The pendulum is swinging so as to make a maximum angle of 45 ∘ with the vertical. Air resistance is negligible. (A). What is the speed of the rock when the string passes through the vertical position? Express your answer using two significant figures. (B) What is the tension in the string when it makes an angle of 45∘ with the vertical?(C). What is the tension in the string as it passes through the vertical?
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Which electromagnetic radiation wavelength is efficiently observed using ground based telescopes?
The type of electromagnetic radiation whose wavelength is efficiently observed using ground based telescopes simply is radio.
The correct answer choice is option a.
Why the wavelength of radio waves efficiently observed using ground based telescopes.A wave can simply be defined as a disturbance which travels through a medium transferring energy from one point to another point.
However, from the context of the task given above, the simple reason why the wavelength of radio waves efficiently observed using ground based telescopes is simply because radio waves can penetrate the Earth's atmosphere.
In addition to the explanation above, there are different types of waves including transverse waves, mechanical waves, sound waves and so on and so forth.
In conclusion, we can now confirm and deduce from the explanation given above that radio waves are a form of electromagnetic radiation.
Complete question:
Which electromagnetic radiation wavelength is efficiently observed using ground based telescopes?
a. radio
b. infrared
c. visible
d. X-rays.
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a 2.5 kg copper block of mass at 500 degrees celsius is placed on a large block of ice. given that the specific heat capacity of copper is 390 j/kg and the latent heat of ice is 335000 j/kg, what is the maximum amount of ice that can melt?
The maximum amount of ice that can melt is 1.45 kg. The most heat that a copper block can dissipate Q=m * C
M = copper block's mass
C = copper's heat
Copper block mass, m=2.5 kg=2500g
the copper block's temperature increasing, =500^o C
Copper-specific heat, C = 0.39J / goC
The heat of water fusion, L=335J/g
The much heat that a copper block can possibly lose,
Q = m × C
=2500 × 0.39×500
=487500J
When the copper block is placed on the ice block, let be the volume of ice that melts. = m1 g
The heat that the melted ice gained,
Q=m1L
m1=Q / L
=487500 / 335
=1455.22g
Hence, the maximum amount of ice that can melt is 1.45 kg.
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An adult inhales about 6.0×10−4 m3 of fresh air during a breath. only 20% of fresh air is oxygen. Assume the pressure in the lungs is 1.0×10^5 pa and the air is at a temperature of 300 k. How many oxygen molecules are in each breath?
Number of oxygen molecules in each breath is 2.9 × 10²¹ mol.
The volume of air inside a breath is
V= 6 × 1/10⁴ m³
Of this, only 20% is oxygen, so the volume of oxygen is
V= 0.20 × 6 × 1/10⁴ m³
Then we can find the number of moles of oxygen by using the ideal gas equation
PV = nRT
Solving for n, we find
n= PV/RT = 4.8 × 1/10³ mol
Since the number of molecules in 1 mol is
6.022×10²³
(Avogadro number)
Then the number of molecules in of oxygen is
(4.8 × 1/10³ mol)(6.022×10²³ mol)
= 2.9 × 10²¹ mol
What is the ideal gas law?
The ideal gas law, also called the general gas equation, is the equation of state for a hypothetical ideal gas.
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A block with a mass of 55 kg is pulled with a force of 220 n. Assuming a frictionless surface, what will be the acceleration of the block?.
When a block with a mass of 55 kg is dragged with a force of 220 n, the acceleration is 4 m/s².
The frictionless surface it is maintained on means that the block will be under a net external force of 220 N.
The block weighs 55 kg.
F = m × a
In this case, the item is subjected to a net external force (F), mass (m), and acceleration (a).
Using the appropriate values in place of F and m:
220 = 55 × a
220 = 55 × a
Taking 55 as a factor, we get 4 = a.
As a result, a 55-kilogram item is drawn over a frictionless surface with an acceleration of 220 N is 4 m/s².
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how can you tell that an electroscope has an eletrical charge? can you tel from an electroscope alone what kind of charge it has? explain
An electroscope is used to detect the presence of an electric charge. It consists of two metal plates or leaves that are suspended from an insulating support.
When an electric charge is brought near the electroscope, the leaves will diverge due to the electrostatic force of repulsion between them.
The extent of the divergence will depend on the magnitude of the charge. However, it is not possible to determine the sign (positive or negative) of the charge from an electroscope alone.
An electroscope is a device used to detect the presence of an electric charge. To tell if an electroscope has an electric charge, you can observe the behavior of the metal leaves on the electroscope.
When an electroscope has an electric charge, the metal leaves on the electroscope will spread apart. This is because the same charge on the metal leaves repels each other, causing them to move away.
It is not possible to tell from an electroscope alone what kind of charge it has. To determine the type of charge, you will need to use another device to induce a charge on the electroscope and observe the behavior of the leaves. If the leaves move away from each other, the electroscope has a positive charge. If the leaves move towards each other, the electroscope has a negative charge.
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What force must be exerted on the pedal cylinder of a hydraulic lift to support the weight of a 2000-kg car (a large car) resting on the wheel cylinder? the pedal cylinder has a 2. 00-cm diameter and the wheel has a 24. 0-cm diameter.
The Force that must be exerted on the pedal cylinder of a hydraulic lift is 136.11 newton.
Archimedes' principle states that:
F1 / A1 = F2 / A2
F2 = (A2 / A1) * F1
Also, the formula for the force is F = mg. (g is gravity = 9.8)
Formula for the area of the cylinder is A = πr^2, therefore we get
F2 = (πr2^2 / πr1^2) * mg
Given the diameter of the cylinders as 2 cm and 24 cm, so, the radius is :
r1 = 2/2 = 1
r2 = 24/2 = 12
π = 3.14
Substituting the above values in the formula, we get:
F2 = (π 1^2 / π 12^2) * 2000 * 9.8
F2 = (3.14*1^2 / 3.14*12^2)*2000*9.8
F2 = 136.11 N
So, we can conclude by saying that the force that must be exerted on the pedal cylinder of a hydraulic lift is 136.11 newton.
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During the Vibrations unit, Mr. Ricelander gave each lab group a spring and challenged them to determine the spring constant and then to select a mass to hang from the spring so that it oscillates up and down with a period of 1.0 seconds. Laquinta and Jamar determine the spring constant to be 38.4 N/m. What mass (in grams) should they choose to hang from the spring in order to meet the challenge?
The mass (in grams) they should choose to hang from the spring in order to meet the challenge is 973.7 g
How do I determine the mass?The period of oscillation is related to mass and spring constant according to the following formula:
T = 2π√(m/K)
Where
T is the periodm is the mass K is the spring constantUsing the above formula, we can obtain the mass that Laquinta and Jamar will choose in order to meet the challenge. Details below:
Period (T) = 1.0 secondSpring constant (K) = 38.4 N/mPi (π) = 3.14Mass (m) =?T = 2π√(m/K)
Square both sides
T² = 4π²m / K
Cross multiply
4π²m = T²K
Divide both sides by 4π²
m = T²K / 4π²
m = (1² × 38.4) / (4 × 3.14²)
m = 0.9737 Kg
Multiply by 1000 to express in grams
m = 0.9737 × 1000
m = 973.7 g
Thus, the mass is 973.7 g
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The stars of the Milky Way are all near a great circle on the Celestial Sphere. This great circle?
A. is the Celestial Equator.
B. is the Ecliptic.
C. passes through the Celestial Poles.
D. is none of the other things listed here.
It is D. is none of the other things listed here. The stars of the Milky Way are all near a great circle on the Celestial Sphere. This great circle is called the milky circle
The Milky Circle is a great circle on the celestial sphere that is defined by the stars of the Milky Way. It is visible to the n_aked eye and is one of the most recognizable features of the night sky, stretching across the entire sky from horizon to horizon. It is composed of millions of stars, all of which reside in the same galactic plane and are moving in the same direction around the galactic center. The Milky Circle is a beautiful sight to behold, especially during a clear night, when it appears as a wide band of light. It is a reminder of the vastness of the universe and the beauty of the night sky. It is also a great way to orient oneself in the night sky, as its stars form a familiar pattern that can help one find constellations and other objects.
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A simple pendulum consisting of a blob of mass m attached to a string of length L swings with a period T. If the mass of the blob is reduced by half, what will the new period of oscillation be? Answer is: T The pendulum is now swinging on Pluto. Calculate the new period of oscillation in terms of T, knowing that on Pluto the gravity is 1/16 of gravity on the Earth. T pluto=______
A new oscillation period of 4T will be used. Pluto is currently in the pendulum's swing.
In a basic pendulum, what is the mass of the string?One-tenth the mass of the pendulum bob, it turns out, the string of a simple pendulum has that mass.
The length of a pendulum's string can be determined in what way?Use the equation L = (T/ 2)2*g to determine how long a basic pendulum is. where g is the gravitational acceleration and T is the simple pendulum's period of time. It consists of a point mass "m" hung from a fixed support by a light, inextensible string with length L. A gravitational force is responsible for the motion, which is in a vertical plane.
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what is the period of this pendulum if its mass is doubled? note that you do not know the value of mm , ll , or gg , so do not assume any specific values. the required analysis involves thinking about ratios.
The period of this pendulum if its mass is doubled. The required analysis involves thinking about ratios is The period is 8 s when the pendulum's mass is doubled.
When a weight is shifted sideways from its equilibrium position, gravity acts as a restoring force on it, causing it to accelerate back toward the equilibrium position. This is what is meant by the term "pendulum," which refers to a weight that is hanging from a pivot so that it can swing freely. The restoring force acting on the mass of the pendulum once it is released causes it to oscillate, swinging back and forth about its equilibrium point. The duration, or the time required for a left swing and a right swing, is the period. The length of the pendulum and, to a lesser extent, the width of the amplitude, or swing, affect the period. Since Galileo Galilei's early scientific investigations of it in 1602, pendulums have been employed for timekeeping, and they remained the most precise timekeeping technology until the 1930s. For 270 years, households and offices utilized the pendulum clock invented by Christiaan Huygens in 1658 as the world's primary timekeeper before the quartz clock took its place.
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What is the formula for wave speed?
The formula for wave speed is - wave speed=frequency of wave × wavelength of wave.
Wave speed is the distance the wave goes in a given measure of time, for example, the quantity of meters it voyages each second. The condition that addresses the wave speed is given as follows:
On the off chance that a sea wave peak ventures a distance of 30 m in 10 seconds, then, at that point, the speed of the sea wave is 3 m/s. Then again, in the event that the peak of the sea wave covers a distance of 40 m while is 10 seconds, then, at that point, the speed of this sea wave is 4 m/s. From this, we can reason that the quicker wave covers a bigger distance in a similar measure of time.
In mathematical terms ,formula of wave speed is
c=ν × λ
where c is the defined as the speed of wave in any medium,
ν is defined as the frequency of the wave and
λ is defined as the wavelength of the wave.
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when the number of turns on an inductor that has an inductance of 100 mh doubles, while keeping its length, cross-sectional area, and core material constant, what is the new inductance value
L=((N2)* u* A)/l is the coil's inductance in Henrys. Therefore, doubling the number N of turns results in a four times (2^2) increase in inductance.
Often in the form of a coil, a conductor's inductance is a quality that is determined by the amount of the electromotive force, or voltage, that is induced in it in comparison to the rate at which the electric current that generates the voltage changes.
Henries (H) is used as the unit of measure for self-inductance. A device's resistance to a change in current through it is inversely proportional to its self-inductance L. A big L, such as that seen in a large coil with numerous turns and an iron core, prevents rapid changes in current.
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what is the density of a substance that has a mass of 2.0 g , and when placed in a graduated cylinder the volume changed from 70 ml to 75 ml ?
A material with a mass of 2.0 g when placed in a graduated cylinder the volume changed from 70 ml to 75 ml has a density of 0.4 g/mL.
How do I calculate the substance's density?
We'll start by getting the substance's volume. This is attainable as follows:
Water volume: 70 mL
75 mL = volume of material + water.
Substance volume =?
Substance volume equals (substance volume plus water) - (Volume of water)
Substance volume = 75 - 70
5 mL is the substance's volume.
Finally, we will calculate the substance's density. Below is an example to help:
2.0 g is the substance's mass.
5 mL is the substance's volume.
Substance density =?
Mass / volume equals density.
Substance density = 2/5
0.4 g/mL is the substance's density.
The density is therefore 0.4 g/mL.
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L 5.3.2 Test (CST): Noncontact Forces
Question 1 of 10
Which sentence describes a difference between mass and weight?
OA. Only mass depends on the amount of matter in the object.
OB. Only mass changes depending on the gravitational force.
C. Only weight changes depending on the gravitational force.
OD. Only weight depends on the amount of matter in the object.
SUBMIT
C.) Only weight changes depending on the gravitational force.
What is gravity, and what does it look like?The term gravitational force refers to the force that the earth exerts on a body. Examples of motion caused by gravitational force include the downward motion of water in a river, the downward motion of water in a stream, and the upward motion of a ball when it is thrown.
How is gravity measured?An equipment used to gauge gravitational acceleration is called a gravimeter. There is a gravitational potential for each mass. This potential's gradient acts as a force. This gravitational force is quantified by a gravimeter.
What factors affect gravity?The size of this force is determined by the mass of each object and the separation of their centers.
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What is the change in internal energy of a system when a total of 150 J of heat transfer occurs out of the system and 159 J of work is done on the system?
The change in internal energy when work is done on system is 9J.
In thermodynamics, the ideal gas concept is often used. This is an approximation of a real system used for educational purposes.
An ideal gas is a gas made up of particles that appear as point objects that interact only by elastic collisions. Here the kinetic energy consists only of the translational energies of the individual atoms.
Therefore, the change in the internal energy of an ideal gas is due only to the change in its kinetic energy. In this case the energy depends only on pressure, volume and thermodynamic temperature. Values are proportional to the mass (in moles), temperature, and specific heat of a given volume of gas.
Q=U+W
U=Q-W
U=150-159=9J
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what is the band gap energy in kilojoules per mole if blue diamonds absorb orange light with a wavelength of 675 nm?
The band gap energy in kilojoules per mole is 1.73×105J.
The band gap is the distance between the valence band and the conduction band of an electron. Essentially, the bandgap represents the minimum energy required to excite an electron to a state in the conduction band where it can participate in conduction. Higher frequencies and lower wavelengths of light are absorbed.
In physics, especially for solids, the band gap is also called the energy gap. It is the range of energies that exist in solids where no other electronic state can exist. In the diagram of the electronic band structure of solids, the bandgap is commonly called the energy difference.
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consider these two facts: (a) the earth has been hit by as many impactors as the moon and mars. (b) the state of washington has a total land area of about 177,000 km2. calculate how many 5-km-sized craters have been formed in washington state over the last 4 billion years. (show your work.)
As many impactors as the moon and mars combined have struck the earth are 35,400. Since the deposition process is happening everywhere across the planet
a) In the past 600 million years, the Moon has been struck by about 60 impactors, compared to about 43,000 for Mars.
Therefore, if we divide the size of Washington by the size of the hit, we get
177000 km² ÷ 5 km = 35,400.
b). However, there are no impact craters that are 5 km wide because the deposition process is ongoing everywhere over the earth. The erosional material that fills the craters causes them to shrink in size until they are no wider than 5 kilometers.
A deposition is a geological process that involves the addition of soil, rocks, and sediments to a landform or landmass. Transported by wind, ice, water, and gravity, previously weathered surface material is deposited when enough kinetic energy in the fluid is lost, forming layers of sediment.
The null-point hypothesis states that deposition occurs when sediment transportation-related forces are no longer strong enough to overcome gravity and friction-related factors, which provide resistance to motion. The deposition also covers the accumulation of sediment brought on by chemical or organic processes.
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What event made it possible for photons to begin to travel freely through the universe when the universe was about 380,000 years old? The universe had expanded and cooled enough for electrons to combine with nuclei to form neutral atoms. Atoms started to combine to make the first molecules. Magnetic fields had weakened to the point that they no longer interfered with light. Atomic nuclei were finally able to escape the plasma of the early universe. O Fusion of hydrogen to make helium ceased.
It had become weak enough for magnetic fields to stop interfering with light. Electromagnetic waves, or photons, are particles that can travel in response to the strength of magnetism.
The earth's magnetic fields are also known to shield us from ultraviolet radiation that are bad for our health. Forming atomic nuclei The universe began to enlarge, cool down, and become less dense. Deuterium, an isotope of hydrogen, was created by the collision of protons and neutrons. As hydrogen and helium combine, Helium is created when deuterium atoms unite. Initial neutral atoms are created When the universe's matter sufficiently cooled, electrons joined with nuclei to create neutral atoms.The cosmos is translucent. The universe turned translucent during the phase known as "recombination" due to the free electrons' absorption. The formation of gases ultimately shapes the stars and galaxies.Reionization is the stage at which gases condensed to the extent necessary to give rise to the first stars and galaxies.
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iven the mass of the rubber in the balloon is 1.80 grams, what is the net vertical force on the balloon if it is let go? consider the buoyant force on the balloon, and the weight of the rubber and the helium inside the balloon. the volume of the rubber itself is negligible.
When a balloon is released, its buoyant force is 0.0316 N, and its net vertical force is 0.0096 N.
a) volume of balloon = 2.5 litre = 0.0025 m3
Buoyant force = Density of air * g * Volume of displaced air
At STP, the density of air is approximately 1.29 kg/m3
Buoyant force = 1.29 * 9.8 * 0.0025 = 0.0316 N
b) Net vertical force = Buoyant force – Weight
density of helium = 0.1786 kg/m3
Weight of rubber + helium = [0.0018 + (0.1786*0.0025)] * 9.8 = 0.0220 N
Net vertical force = 0.0316 – 0.0220 = 0.0096 N
A fully or partially submerged object is subject to an upward force known as the buoyant force. Upthrust is another name for this thrust upward. A body that is partially or completely submerged in a fluid gives the impression of losing weight because of the buoyant force, or that it is lighter.
The tendency for an object to sink is when its density exceeds that of the liquid it is submerged in. The object may be kept afloat by force if it is either less dense than the liquid or is shaped properly (like a boat). It floats in water if its relative density is less than one, and it sinks in water if its relative density is more than one.
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suppose a 50 turn coil lies in the plane of the page in a uniform magnetic field that is directed into the page. the coil originally has an area of0.15m2. it is squished to have no area in0.075s.what is the magnitude of the average induced emf in volts if the uniform magnetic field has a strength of 1.5 t?
The magnitude of the average induced emf if the uniform magnetic field has a strength of 1.5T is 150 Volts.
We know that the rate of change in magnetic flux will cause EMF in a closed loop because of Faraday's law of electromagnetic induction.
So, according to Faraday's law
[tex]EMF = N\frac{BA}{del T}[/tex]
where,
N = 50
B = 1.5T
del T = 0.075s
A = 0.15 [tex]m^{2}[/tex]
So,
[tex]EMF = 50(\frac{1.5*0.15}{0.075})[/tex]
[tex]EMF = 150 Volts[/tex]
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a student pulls a box of books on a smooth horizontal floor with a force of 100 n in a direction of 37e above the horizontal. if the mass of the box and the books is 40.0 kg, what is the acceleration of the box?a student pulls a box of books on a smooth horizontal floor with a force of 100 n in a direction of 37e above the horizontal. if the mass of the box and the books is 40.0 kg, what is the acceleration of the box?
A student pulls a box of books on a smooth horizontal floor with acceleration of the box will be 1.99 m/s.
When we apply a horizontal force on a body kept on horizontal floor?When we apply a horizontal force on a body kept on horizontal floor, a horizontal force starts opposing the net applied force. This force is called frictional force and is always tangential to the contact surface.
How do you calculate the force applied on a horizontal surface?We can also find the normal force on the horizontal surface using the coefficient of friction. The basic formula of friction is f =mu N; from this, we get N = f/mu. mu is the coefficient of friction which tells the measure of friction acting between the surface.
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in 1989, at solar maximum, there were 157 sunspots visible during the year. what would be the next year you would expect to observe about the same number of sunspots?
The next solar maximus which will be visible with 157 or close to 157 sunspots will be visible after 11 years. which is 2000.
Sunspots are formed in region of higher magnetic field, they appear dark on the surface of the Sun.
Solar maximus is nothing but the regular amount of period of the greatest solar activity during the sun's 11 year solar cycle.
It was not exactly 157 but 140 sunspots were seen in 2000.
As the year follows, the sunspots are becoming lesser and lesser.
This data is yearly created by NASA.
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