Need some help with these two physics problems!

The net force on the apple is 0.9 N

There are two forces acting on an apple.

Gravitational force = 1 N downwards

Resistance force = 0.1 N rightwards

These two forces are acting at right angle to each other.

The net force on the force gauge is the net resultant force of the compression force and the resistance force that are being measured

Net force is also said to be the vector sum of the all forces acting on the object at a certain instance. Forces with same magnitude in opposite directions cancel each other.

The gravitational force will act downward and the air resistance will try to hinder the speed so the net force will be

Net force = 1 - 0.1 = 0.9 N

Therefore, the net force will be 0.9 N

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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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The letter M surrounded in a circle, which stands for a motor, would be the finest symbol to symbolize an electric fan speed controller in an electrical circuit.

For industrial application, standardized motors offer practical mechanical power. The largest have an output more than 100 megawatts and are used for pumped storage, pipeline compression, and ship propulsion.

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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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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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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.

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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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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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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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.

Point 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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In the event of an accident or a car crash, road safety barriers and fences prevent automobiles from running off the road.

Newton's Three Laws of Physics can help explain what these safety barriers are and how they help to save lives during car accidents :

I.  Unless acted upon by an imbalanced force, an object at rest will remain at rest, and an object at constant velocity will remain at constant velocity.

II.  If an imbalanced force occurs, a mass will experience acceleration proportional to its magnitude.

III.  When you apply a force to an object, you will feel a force that is equal    in magnitude but opposite in direction.

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This molar mass suggests that the gas sample is likely a compound made up of a single element, such as a noble gas. One possibility is that the gas sample is argon, which has a molar mass of approximately 39.9 g/mol. Alternatively, the gas sample could be krypton, which has a molar mass of approximately 83.8 g/mol.

Molar mass is a term used in chemistry to refer to the mass of a substance in grams per mole. It is defined as the mass of a substance divided by the number of moles of that substance. The molar mass of a substance is often used to convert between mass and moles, or to calculate the mass of a substance required to react with another substance in a chemical reaction.

To identify the gas sample, you can use the ideal gas law, which states that the pressure of a gas is directly proportional to its temperature and the number of moles of the gas, and inversely proportional to the volume it occupies.

The ideal gas law is given by the following equation:

PV = nRT

where P is the pressure of the gas in pascals, V is the volume of the gas in liters, n is the number of moles of the gas, R is the universal gas constant, and T is the temperature of the gas in kelvins.

Using the values provided in the question, we can solve for the number of moles of the gas:

n = (PV)/(RT)

= (790 torr * 1.365 L) / (8.314 J/mol*K * 368 K)

= 0.0478 moles

Since the mass of the gas sample is 3.33 grams and the number of moles is 0.0478 moles, we can use the molar mass of the gas to identify it. The molar mass is given by the following equation:

M = m/n

where M is the molar mass in grams per mole, m is the mass of the gas in grams, and n is the number of moles of the gas.

Solving for the molar mass, we get:

M = 3.33 g / 0.0478 moles

= 70.0 g/mol

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A new oscillation period of 4T will be used. Pluto is currently in the pendulum's swing.

One-tenth the mass of the pendulum bob, it turns out, the string of a simple pendulum has that mass.

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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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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The slit-width-to-wavelength ratio that the first minimum of a single-slit diffraction pattern appear at 30° is 1/2.

The distance between identical points (adjacent crests) in adjacent cycles of a waveform signal propagated in space or along a wire is defined as the wavelength. The distance between any given point in a wave and the same point in the next wave cycle. This can be from crest to crest, trough to trough, null to null, and so on.

It should be noted that for the first minimum, the value of m is equal to 1. That is m = 1.

Therefore, the slit ratio of the slit width to wavelength will be:

a / wavelength  = 1 / sin

Since the angle is 30°, this will be:

a / wavelength = 1 / sin 30°

= 1 / 0.5

= 2

Therefore, the wavelength is 2.

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The difference between a dental X-ray examination and the bright lights of the exam room lies in the type of radiation emitted. During a dental X-ray examination, the X-ray source emits ionizing radiation, which can be harmful if a person is exposed to it for too long.

This is why the person giving the X-ray examination will leave the room while the X-ray source is active. The bright lights of the exam room, on the other hand, emit non-ionizing radiation, which is not as harmful and can be safely exposed to without any special precautions.

The type of radiation emitted is an important factor when considering safety precautions. Ionizing radiation can be dangerous, so it is important to take the necessary steps to protect oneself from it. Non-ionizing radiation, on the other hand, is not as dangerous and can be safely exposed to without taking any special precautions. This is why the person giving the X-ray examination will leave the room while the X-ray source is active, but dental office workers do not take similar precautions against the bright lights of the exam room.

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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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The spring constant is 50000 N/m.

The spring constant is a measure of the stiffness of a spring.

Electric potential energy of a spring can be calculated as P.E. = (1/2)*k*x²

where, k is the spring constant,

x is the displacement caused by the spring

The spring stores energy = 100 J

Displacement suffered by the spring = 2 cm = 0.02 m

P.E. = (1/2)*k*x²

k = (2*P.E.) / x²

k =  (2 * 100) / (0.02)²

k = 200 / 0.0004

k = 50000 N/m

The spring constant for a spring having potential energy as 100 J  is 50000 N/m.

The question is incomplete the complete question is "When a spring is stretched by 2 cm its potential energy is 100J? What is the spring constant".

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T = 0.82 °C is the difference in water temperature caused by the first cylinder. The final water temperature, T₀, was 20.82 °C. The second cylinder's temperature change, T', was 2.45 °C. The final water temperature, T', was 23.27 °C.

The cylinder weighs m = 3.0 kg.

The cylinder dropped from a height of h = 500 meters.

M = 9 kg is the weight of the second cylinder.

The second cylinder dropped from a height of 500 meters, h'.

T = 20° C is the average water temperature.

The water's mass, m', is equal to 10 kg.

Consider that the kinetic energy is completely transformed into thermal energy upon contact with the water.

K.E = P.E

P.E = mgh

= 3 x 9.8 x 500

= 14700 J

The change in temperature,

ΔT = E ÷ m c

= 14700 ÷ (10 x 1800)

= 0.82° C

The first cylinder's contribution to the water's temperature change, ΔT = 0.82 ° C

the water's ultimate temperature,

T₀ = T + ΔT

= 20° C + 0.82° C

= 20.82° C

The final temperature of the water, T₀ = 20.82° C

The K.E of the second cylinder falling from height h to the surface of the water is,

P.E = Mgh'

= 9 x 9.8 x 500

= 44100 J

The change in temperature,

ΔT' = E' ÷ m c  

= 44100 ÷ (10 x 1800)

=  2.45° C

The change in temperature due to the second cylinder,  ΔT' = 2.45° C

The final temperature of the water,

T' = T + ΔT +  ΔT'

= 20° C + 0.82 ° C + 2.45° C

= 23.27° C

Hence, the final temperature of the water, T' = 23.27° C.

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Answer:

1) 28.52

2) 3.52

3) 35.55

4) 10.55

The maximum strength is 333.33 × 10⁻⁸ Vs/m².

What is an electromagnetic wave?

Electromagnetic waves, which include radio waves, visible light, and gamma rays, are made up of electric and magnetic fields and move through space or a material medium at the speed of light. Time-varying magnetic and electric fields are linked to one another at right angles and perpendicular to the direction of motion in such a wave. The strength and frequency v of the time fluctuation of the electric and magnetic fields define an electromagnetic wave.

We know,

B = [tex]\frac{E}{c}[/tex]

Where,

c = speed of light = 10⁸ m/s

B = [tex]\frac{1000 v/m}{3 X 10^{8}m/s }[/tex] = 333.33 × 10⁻⁸ Vs/m²

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Coil your copper wire around an enormous iron nail to create an even more powerful electromagnet. Magnetic induction causes the nail to become into a magnet, strengthening the entire structure.

Electric charges in motion and the intrinsic magnetic moments of elementary particles, which are connected to their spin, a fundamental quantum feature, create magnetic fields.

Electric charge movement results in the creation of a magnetic field. Inside the coil, the magnetic field is even and straight.

Therefore, You may create weak magnets by coiling some copper wire and attaching the ends to a small battery.

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Answer:

A is the answer

Explanation:

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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The mass (in grams) they should choose to hang from the spring in order to meet the challenge is 973.7 g

The period of oscillation is related to mass and spring constant according to the following formula:

T = 2π√(m/K)

Where

Using the above formula, we can obtain the mass that Laquinta and Jamar will choose in order to meet the challenge. Details below:

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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C.) Only weight changes depending on the gravitational force.

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.

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.

The size of this force is determined by the mass of each object and the separation of their centers.

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Answer:

Frequency=200Hz Time Period=1/Frequency =1/200=0.005sec.

Explanation:

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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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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The horizontal force needed to pull the rug and Thomas across the floor at a constant speed is 78 N.

Taking to Thomas and the rug as a single system, if they slide across the floor at constant speed, this means that their acceleration is just zero. According to Newton's 2nd Law, if the acceleration is zero, this means that the net force applied is zero too.

In the horizontal direction, there are two forces acting on Thomas and the rug (as a single system), the applied force, and the kinetic friction force, which must be equal and opposite each other:

= f (Thomas) = f(rug)

By definition, as the friction force is the horizontal component of the contact force, it can be expressed as follows:

= f(rug) = μF(normal)

where μ = coefficient of kinetic friction = 0.12 and F(normal)

In this case, as the system thoomas+rug is not accelerating in the vertical direction, and the surface is level, the normal force (which is always perpendicular to the surface), must be equal to the force of gravity.

Assuming that the mass of the rug is neglectable, we can write:

= F(normal) = F(g)

= F(g) = mg

= 650 N

Substituting in the first equation,

= f (Thomas) = f(rug) = 0.12 X 650

= f = 78 N

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The equal and opposite force is the force of your friend's hand pulling on the rope in the opposite direction.

According 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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Final velocity = 57.8m/s

What is acceleration?

In mechanics, acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities. The orientation of an object's acceleration is given by the orientation of the net force acting on that object

Acceleration = (Initial velocity - Final velocity) /time

Given,

time = 3.4s

Acceleration = 17 m/s^2

17 = (0-v)/3.4

final velocity = 17 X 3.4 = 57.8 m/s

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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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