Both people will have to apply a force equal to 5150N.
This problem can be solved using Newton's Second Law of Motion which states that the force applied on any particle is equal to the product of mass and acceleration of the particle. The expression can be written as
F = ma ; where 'm' is the mass of particle and 'a' is the acceleration of particle.
Now, m = 2000 kg and a = 5 m/s²
F = 2000 kg × 5 m/s²
F = 10000 N
Now, the friction force will be added to this required force. Because to get the car starting to move, the friction force first needs to be overcome.
Total force = F + Frictional force
Total force = 10000 N + 300 N
Total force = 10300 N
Now individual force applied by each person = 10300 N/2 = 5150 N.
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in a movie, a superhero stops an 8 gram bullet moving at 400 m s-1 with his hand. his hand provides an impulse to stop the bullet. the average force provided to the bullet during the time of contact is 1200 newton. a. calculate the time of contact with the hand before the bullet comes to rest. b. calculate the work done by the hand in bringing the bullet to rest. c. calculate how far back the hand has been displaced. d. calculate the change in the kinetic energy of the bullet..
The bullet's kinetic energy is 4000N.
What exactly is kinetic energy?
To accelerate an item, we must apply force to it. We must make an attempt to utilise force. When work is done on an item, energy is transferred, and the object then travels at a new, constant speed. The energy conveyed is known as kinetic energy, and it is affected by the mass and speed obtained.
Kinetic energy is defined in physics as follows:
The amount of work an item can do while moving is measured by its kinetic energy.
According to the information provided:
mass=10g=10/1000=0.01kg
Initial velocity=u=200m/s
0 m/s final velocity
S=5cm=5/100=0.05m
Using the third equation of motion: V²-u²=2as
0²-(200) ²=2a*0.05
-40000=a/10
a=-400000m/s²
Newton's Second Law states:
F=ma
=0.01*(-400000)
=-4000N
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Kinetic energy is a form of energy that an object or a particle has by reason of its motion. If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy.
What exactly is kinetic energy?
To accelerate an item, we must apply force to it. We must make an attempt to utilise force. When work is done on an item, energy is transferred, and the object then travels at a new, constant speed. The energy conveyed is known as kinetic energy, and it is affected by the mass and speed obtained.
Kinetic energy is defined in physics as follows:
The amount of work an item can do while moving is measured by its kinetic energy.
According to the information provided:
mass=10g=10/1000=0.01kg
Initial velocity=u=200m/s
0 m/s final velocity
S=5cm=5/100=0.05m
Using the third equation of motion: V²-u²=2as
0²-(200) ²=2a*0.05
-40000=a/10
a=-400000m/s²
Newton's Second Law states:
F=ma
=0.01*(-400000)
=-4000N
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a girl throws a rock horizontally, with a velocity of 8.0 m/s, from a bridge. it falls 20 m to the water below. how far does the rock travel horizontally before striking the water, assuming negligible air resistance?
The rock thrown horizontally at 8.0 m/s from a bridge before it hits the water = 16.15 m.
Free fall motionFree fall motion is a motion that falls from a height without having an initial velocity. As long as the object is falling, air resistance is negligible, its acceleration is constant and the magnitude is equal to the acceleration due to gravity. In addition, the time it takes for an object to fall does not depend on its mass, but depends on its height.
We have,
The velocity of the rock = 8.0 m/s ⇒ v
Fall height of the rock = 20 m ⇒ h
And, to determine how far does the rock travel horizontally before striking the water, we use the equation:
d = v x t
We have the velocity (v), but don't have the time (t).
So, determine the time first
Use the equation to determine the height:
h = ½ gt²
20 = ½ (9.8)t²
t² = 4.08
t = [tex]\sqrt{4.08}[/tex]
= 2.01 s
So, the distance the stone traveled before striking to the water:
d = (8.0) (2.01)
= 16.15 m
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the human ear canal is, on average, 2.5cm long and aids in hearing by acting like a resonant cavity that is closed on one end and open on the other. the length of the ear canal is partially responsible for our sensitivities to certain frequencies. use 340m/s for the speed of sound when performing the following calculations.Part A
What is the first resonant frequency?
Part B
What is the wavelength at second resonance?
Part C
How does the first resonant frequency change if the ear canal is full of water?Part D
At a listener's ear, the intensity of a conversation is 4×10−6W/m24×10−6W/m2 and a typical adult's ear has a surface area of 210×10−3m2210×10−3m2. What is the power of the sound waves on the ear?
Part E
Long-term exposure to loud noises can damage hearing. If a loud machine produces sounds with an intensity level of 100dB100dB, what would the intensity level be if the intensity were reduced by a factor of 4?
The first resonance frequency is 3400 Hz and the wavelength at second frequency is 3.33 cm. After the ear canal is full of water the first resonance frequency increases. The power of sound waves on the year is 840 X 10⁻⁹ W and if the intensity of sound is reduced by a factor of 4, then the intensity level will be 135 dB.
(a) The ear, being open at one end and closed at the other, is equivalent to a closed pipe. For a closed pipe, the first resonant frequency occurs when one quarter of the wavelength is equal to the length of the pipe.
= λ/4 = l
= λ = 4l
Now, Speed is given by
= v = fλ
where f = frequency
= f = v/λ
At the first resonant frequency,
= f = v/λ
= f = v/4l
= f = 340 / (4 X 2.5 X 10⁻²) m
= f = 3400 Hz
(b) At second resonance,
= (3/4)λ = l
= λ = (4/3) X l
= λ = (4/3) X 2.5 X 10⁻²
= λ = 3.33 cm
(c) Since, sound travels faster in a liquid than in gas, the first resonance frequency increases when the ear canal is filled with water as speed increases. This is because, speed is directly proportional to intensity.
(d) Intensity = i = 4 X 10⁻⁶ W/m²
Surface area = a = 210 X 10 ⁻³ m²
Power of the sound waves = p =
= p = i X a
= p = 4 X 10⁻⁶ X 210 X 10 ⁻³
= p = 840 X 10⁻⁹ W
(e) Intensity level = l = 100 dB
If the intensity is reduced by 4, then using the relationship between decibel and sound intensity is :
= β = 10 X log(I₁ / I₂)
= β = 10 log (0.25/10⁻¹²) dB
= β = 135 dB
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A 8. 0-m long wire with a mass of 10 g is under tension. A transverse wave for which the frequency is 570 hz, the wavelength is 0. 10 m, and the amplitude is 3. 7 mm is propagating on the wire. The maximum transverse acceleration of a point on a wire is closest to.
The maximum transverse acceleration of a point on a wire is 47410.0839m/sec² having mass of 10g.
Transverse Wave travels from highest point of positive amplitude to negative highest point amplitude. Amplitude is the point where potential energy of wave is highest. Transverse wave travels in definite direction. We have mass=10g=0.001kg,length of wire is 8m,frequency of transverse wave is 570Hz,wavelength =0.10m
Now, we need to transverse wave acceleration, for this we need angular frequency because there is co-relation between transverse wave acceleration and angular frequency.
We know that angular frequency=2πf where f is the angular frequency.
ω=2×π×570
=>ω=2×3.14×570
=>ω=6.28×570
=>ω=3579.6/sec
Now, for acceleration we know that =ω²A where A is the amplitude of the wave.
=>a = (3579.6)²×3.7mm
=>a=((3579.6)²×3.7×1/1000)m/sec²
=>a=[(12813,536.2)×3.7×1]/1000m/sec²
=>a=47410083.8/1000m/sec²
=>a=47410.0839m/sec²
Hence, maximum transverse acceleration is 47410.0839m/sec²
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A wave has a speed of 15 m/s and a frequency of 10 Hz. what is the wavelenght of the wave?
Answer:
1.5 m
Explanation:
speed=frequency*wavelength
15=10*wavelength
4. A truck travels a curve of radius 10 m at 18 km/hr on a force of 15000 N. What is the mass of the truck?
Answer:
The mass of the truck is 1500 Kg.
Explanation:
Given;F = 15000 NWe know that,
F = mg
g = acceleration due to gravity = 10m/s²m = F/g
m = 15000/10
m = 1500 Kg
m = 1500 KgThus, The mass of the truck is 1500 Kg.
calculate the mass (in kg) of 4.87 x 1025 atoms of zn. calculate the mass (in kg) of 4.87 x 1025 atoms of zn. 5.29 kg 1.24 kg 1.89 kg 8.09 kg 1.09 kg.
5.29 kg is the mass of 4.87 x 10²⁵ atoms of Zn.
What is mass?As a measure of inertia, which is a fundamental characteristic of all matter, mass is used in physics. It essentially refers to a body of matter's resistance to changing its speed or location in response to the application of a force.The symbol for mass is m or M. The force exerted on a mass as a result of the acceleration brought on by gravity is measured as weight. W typically stands for weight.
As, we know
Mass of 1 mole of Zn = 65.38 gm/mole
= (65.38/1000) kg/mole
= 0.06538 kg/mole
We know,1 mole = 6.023 × 10²³ atoms.
Thus, moles of Zn = 4.87 × 10²⁵ / 6.023 × 10²³
= 80.87 moles
Therefore, mass of Zn = 80.87 moles × 0.06538 kg/mole
= 5.287 kg ≈ 5.29 kg
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Where is infrared located on the electromagnetic spectrum in relation to other kinds of radiation?
Infrared rays are located in the electromagnetic spectrum between radio waves and gamma waves.
Electro magnetic radiation travels in waves, just like waves in an ocean. The energy of the radiation depends on the distance between the crests (highest points) of the waves, or the wavelength. In general, the smaller the wavelength, the higher the energy of the radiation. Gamma rays have wavelengths less than ten trillionths of a meter which is about the size of the nucleus of an atom. This means that gamma rays have very high energy.
Radio waves, on the other hand, have wavelengths that range from less than one centi-meter to greater than 100 metres. The energy of radio waves is much lower than the energy of other types of electro magnetic radiation. The only type of light detectable by the human eye is visible light. It has wavelengths about the size of a bacteria cell and its energies fall between those of radio waves and gamma rays.
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A star is born when
A. it first starts to fuse hydrogen into helium.
B. it first starts to fuse helium into hydrogen.
C. it gets its first planet.
D. when it goes supernova.
Underline the statements you think are true:
Gravity depends on the material of the objects.
.Gravity is not a force because it can’t move objects.
Gravity is a force because a force is a push or a pull.
The moon has less gravity than the Earth because it has less mass than the Earth.
The moon has less gravity than the Earth because it has no atmosphere.
The statements that I think are true are:
Gravity depends on the material of the objects.Gravity is a force because a force is a push or a pull.What is gravity?Gravity can be described as the force by which a planet or other body draws objects toward its center however the force of gravity keeps all of the planets in orbit around the sun.
It should be noted that Gravity do depends on the material of the objects however the Gravity can not be regrded as force because it can't move objects but can be consdidered as the force because a force is a push or a pull, as it can be seen in hoiw the moon has less gravity than the Earth because it has less mass than the Earth.
In conclusion, Gravity depends on the material of the objects and it should be noted that Gravity is a force because a force is a push or a pull.
Therefore, option A and C are correct.
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a possible means for making an airplane invisible to radar is to coat the plane with an antireflective polymer. if radar waves have a wavelength of 3.00 cm and the index of refraction of the polymer is n 5 1.50, how thick would you make the coating?
The coating should be made 0.5 cm thick.
Wavelength of the radar waves = λ = 3 cm
Index of refraction of the polymer = n = 1.50
Thickness required = t
Generally the equation for Destructive interference for Normal incidence is mathematically given by:
= 2 X n X t = 0.5 X m X λ
If we calculate at minimum thickness, then m = 1.
Thus, thickness = t =
= 2 X n X t = 0.5 X λ
= 2 X 1.5 X t = 0.5 X 3
= t = (0.5 X 3) / (2 X 1.5)
= t = 0.5 cm
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A moving car has 40,000 j of kinetic energy while moving at a speed of 7.0 m/s. a spring-loaded automobile bumper compresses 0.30 m when the car hits a wall and stops. What can you lean about the bumpers spring using the information?
This means that the bumper's spring has a spring constant of 8.89×1058.89×105 N k=8.889×105N/m
What exactly are quantitative hypotheses?It believes that reality is a subject that can be investigated impartially.The researcher must maintain their independence and distance from the subject under study.Research was value-free; it should not be in any way influenced by the researcher's values.
What are some quantitative research presumptions?In general, quantitative research makes the following assumptions:Truth is a phenomenon that can be investigated objectively because it is "out there," objective, and independent of a researcher;
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A box slides on the ground. It has a 20N applied force pushing it to the right. The friction between the box and the ground is 8N. What is the magnitude of the net force on the box?
Answer:
12 N
Explanation:
Fnet = 20 N - 8 N = 12 N
Force of friction is always in the direction opposite to the direction of motion of the object.
a diatomic ideal gas at pressure p and volume v is expanding to three times its initial volume under constant pressure. t or f
True. A diatomic ideal gas at pressure P and volume V is expanding to three times its initial volume under constant pressure.
Pressure Variations of a Diatomic Ideal Gas During ExpansionThe pressure of the gas will remain constant as the volume expands, therefore the ideal gas law states that the product of pressure and volume will remain constant, meaning the pressure will decrease as the volume increases.
As the diatomic ideal gas expands to three times its initial volume, the pressure of the gas will remain constant due to the ideal gas law, which states that the product of pressure and volume must remain constant. As the volume of the gas increases, the pressure must decrease in order to maintain the constant product. Therefore, although the pressure remains constant, the volume of the gas will increase three-fold.
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Calculate the wavelength (in m) of a 9. 81-g bullet traveling at 1769 miles per hour.
A bullet that has a mass of 9.81 g traveling at 1769 miles per hour has a wavelength of 0.85 x 10⁻³⁴ m
De Broglie waveA physicist "Louis de Broglie" put forward a hypothesis that particles can also be treated as particles as well as waves. Using theoretical concepts from black body radiation, de Broglie showed a relationship expressing momentum with wavelength. This equation is derived from the energy equation for a photon in black body radiation. The energy of a photon is a function of the wavelength of the photon.
The equation is:
λ = h/p
We have,
Mass of the bullet = 9.81 g = 0.00981 kg
v = 1769 mph ⇒ 790.81 ms⁻¹
h = Planck's constant ⇒ 6.63 x 10⁻³⁴ m²kg⁻¹
Determine the momentum (p) of the bullet first,
P = mv
= (0.00981) (790.81 )
= 7.75 kgms⁻¹
So, the wavelength of the bullet:
λ = 6.63 x 10⁻³⁴ / 7.75
= 0.85 x 10⁻³⁴ m
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Jacky starts biking to meet up with her friend. She determines that she will be 3 minutes late if she bikes at a speed of 10 mph and 2 minutes early if she goes 12 mph. How much time does she have left before the appointed meeting time?.
There are 26.88 minutes left before Jacky's scheduled time.
Let x be the separation between Jacky & her buddies.
Let t be the typical travel time that Jacky would take to go to her friend's house.
Time = Distance ÷ Speed
He will arrive at the meeting three minutes late if she rides at a speed of 10 mph.
Time of lateness in hours = 3 ÷ 60 = 0.05 hours
t + 0.05 = x ÷ 10
10t + 0.5 = x
She will arrive two minutes before the scheduled meeting time if she rides at a speed of 12 mph.
2 seconds equal 0.033 hours
t - 0.033 = x ÷ 12
12t - 0.396 = x
Compare equations from 10t + 0.5 = x and 12t - 0.396 = x.
10t + 0.5 = 12t - 0.396
12t - 10t = 0.5 + 0.396
2t = 0.896
t = 0.896/2
t = 0.448 hours
t = 0.448 x 60
t = 28.88 minutes
Jacky has 27 minutes well before the scheduled time or 26.88 minutes.
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The theory that dark matter is not real and is just a a problem with our theory of gravity has been falsified by:_______.
The theory that dark matter is not real and is just a problem with our theory of gravity has been falsified by an observation of what happens when clusters of galaxies collide. The term dark matter was coined in 1933 by Fritz Zwicky.
The observed evidence for dark matter is quite strong, and we know it's unlikely to be a mathematical artifact because different galaxies appear to have different amounts of dark matter, with some not having any at all. If our model of gravity were in error, we would expect to see the same error in all galaxies we observe. This is not the case.
Instead, we observe that some galaxies behave exactly as the model says they should, and some behave as if they're heavier than they ought to be.
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An ice skater is spinning with her arms out and is not being acted upon by an external torque. When she pulls her arms in close to her body what happens to her angular velocity?
When she pulls her arms in close to her body, the thing that happens to her angular velocity is that When she pulls her arms in, her rate of spin increases significantly, which reduces her moment of inertia. She exerts effort to pull in her arms, which causes rotational kinetic energy to rise.
What is the angular momentum conservation law?If there is no net external torque surrounding a location in a fixed inertial reference frame, the angular momentum of the system of particles around that point is conserved:
The overall angular momentum is conserved, as you can see. As long as the aggregate is constant, any one of the constituent angular momenta can change. When there is no external force acting on a system, this equation is equivalent to the conservation of linear momentum.
Therefore, since an ice skater performing a spin as an illustration of the conservation of angular momentum. Because there is hardly any friction between her skates and the ice, the net torque on her is almost nil. Additionally, the friction is applied quite near the pivot.
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mechanical energy is select one because the roller coaster select one energy due to friction and air resistance as it travels down the track.
True, Mechanical energy is chosen because the roller coaster chooses one energy owing to friction and air resistance as it travels down the track.
Mechanical energy is the sum of kinetic energy and potential energy in an object that is used to do some work.
In other words, it describes the energy of an object due to its motion or position or both.Mechanical energy is the energy of a moving object or the energy that is stored in objects by their position. Mechanical energy is also a driver of renewable energy. Many forms of renewable energy rely on mechanical energy for adequate power generation or energy conversionMechanical energy is chosen because the roller coaster chooses one energy owing to friction and air resistance as it travels down the track. Therefore the given statement is true.
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The demon drop rode at cedar point amusement park falls freely for 4.33 an after starting from rest. What is it’s velocity at the end of this time?
The velocity of the rode at the end of the time 4.33 seconds is 42.434 m/s.
What is velocity?Velocity is the rate of change of displacement.
To calculate the velocity of the, we use the formula below.
Formula:
v = u+gt................. Equation 1Where:
v = Velocity at the end of the timeu = Initial velocityg = Acceleration due to gravityt = TimeFrom the question,
Given:
u = 0 m/s (From rest)g = 9.8 m/s²t = 4.33 secondsSubstitute these values into equation 1
v = 0+9.8×4.33v = 42.434 m/sHence, the velocity at the end of the time is 42.434 m/s.
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What happens when a rock is under pressure?
Answer: Stress that makes one rock squeeze or push against another.
Explanation:
What is the relationship between heat and pressure?
The relationship between heat and pressure is that they are directly proportional to each other by Gay-lussac law.
What is Heat?Heat is the energy that moves from one thing to another when temperatures are different. Heat passes from the hotter to the colder body when two bodies with different temperatures are brought together. Usually, but not consistently, this energy transfer results in a rise in the heat of the colder body and a fall in the temperature of the hotter body.
By switching from one physical situation (or phase) to the other, such as melting from a solid to a liquid, sublimation from a solid to a vapor, boiling from a liquid to steam or changing from one stable state to another, a substance can absorb heat without increasing in temperature.
The relationship between pressure and temperature for a given volume of gas is straightforward. Pressure rises in systems when temperature increases, and vice versa. The Gay-law Lussac specifies the link between a gas's pressure and temperature.
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Anna and jon sit on a seesaw. Anna has a mass of 60 kg and sits 2 m from the center. Jon has a mass of 70 kg. How far from the center should jon sit so the seesaw is balanced?.
In order to balance the seesaw, John should sit at a distance of 1.7m from the center.
This question can be solved using the concept of moment. in order to balance on the seesaw the moment on the center of seesaw should be zero or in other words
∑M = 0
Now, the moment is expressed by the formula
∑M = F × d
where, ∑M is the Algebraic sum of moments in the center of the balance, M is the moment in the center point ( N*m), F is the Force (N) and d is the distance of the force to the the center point(N*m).
Now, we have
Mass of Anna (M) = 60kg
Mass of John (m) = 70kg
Distance from Anna to the center of the seesaw (dA) = 2m
Distance from John to the center of the seesaw (dJ) = ?
Acceleration due to gravity (g) = 9.8 m/s²
Also, W = mass × g. So, W = Anna's weight and w = John's weight
Now, to find the distance we write the Moment equation as
∑M = 0
(W)(dA) - (W)(dJ) = 0
(M*g)(dA) - (m*g)(dJ) = 0
We divide the equation by g
(M)(dA) - (m)(dJ)= 0
(M)(dA) = (m)(dJ)
dJ = M(dA)/m
dJ = 60×2/70
dJ = 120/70
dJ = 1.7m which is distance of John from center.
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if the rectangular barge is 3.5 m by 24.0 m and sits 0.70 m deep in the harbor, how deep will it sit in the river?
By using Archimedes Principle the Barge will sit at a depth of 0.7203 m
What is Archimedes Principle?
The buoyancy of any floating object partially or totally submerged in a fluid can be computed thanks to Archimedes' principle. The weight of the thing alone exerts a downward force on it. The upward or buoyant force acting on the object is what is meant by the aforementioned Archimedes' principle. The difference between the buoyant force and the object's weight is therefore the net force acting on it. In the event that this net force is positive, the item will rise; in the event that it is negative, the object will sink; and in the event that it is zero, the object will be neutrally buoyant, remaining stationary.
Calculation:
The harbour contains salt water while the river contains fresh water. So assuming that the densities of fresh water and salt water are:
density (salt water) = 1029 kg / [tex]m^3[/tex]
density (fresh water) = 1000 kg / [tex]m^3[/tex]
The amount of water (in mass) displaced by the barge should be equal in two waters.
mass displaced (salt water) = mass displaced (fresh water)
Since mass is also the product of density and volume,
therefore:
[density * volume] of salt water = [density * volume] of fresh water
First we calculate the amount of volume displaced in the harbour (salt water):
V = [tex]3.5 m\ X\ 24.0 m\ X\ 0.70 m[/tex]
V = [tex]58.8 m^3[/tex] of salt water
Plugging in the values into equation 1:
1029 kg / [tex]m^3[/tex] × 58.8 m^3 = 1000 kg/[tex]m^3[/tex]× Volume fresh water
Volume fresh water displaced = 60.5052 [tex]m^3[/tex]
Therefore the depth of the barge in the river is:
60.5052 [tex]m^3[/tex] = 3.5 m × 24.0 m × h
h = 0.7203 m
By using Archimedes Principle the Barge will sit at a depth of 0.7203 m
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What is the frequency of a wave Travelling at 500 m/s with a wavelength of 25 m?
The frequency of the travelling wave is found to be 20 Hertz.
The relationship between the frequency of the wave, the wavelength of the wave and the speed of the wave is given by
V = fy
Where,
V is the speed of the travelling wave,
F is the frequency of the travelling wave,
y is the wavelength of the travelling wave.
The speed of the travelling wave is given to be 500m/s and the wavelength of the travelling wave is 25m.
Now, putting all the values,
500 = f(25)
f = 500/25
f = 20Hz
So, the frequency of the travelling wave is 20Hz.
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Light passes through the entire thickness of the neural layer of the retina to excite the photoreceptors. A) True B) False
It is true to say that the light passes through the entire thickness of the neural layer of the retina to excite the photoreceptors. So,correct option is A.
At the point when the light raises a ruckus around town (a light-touchy layer of tissue at the rear of the eye), extraordinary cells called photoreceptors transform the light into the electrical signs. These electrical signs travel from the retina through the optic nerve to the cerebrum.
The vision cycle depends intensely on the capacity of the eye to refract light. This happens at both the cornea and the focal point of the eye. The course of vision initially begins with the light going through the cornea. Since the cornea has a round surface it behaves like a uniting focal point.
Hence, option A is correct.
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the total number of points of work a team can accomplish in each scrum period is called . group of answer choices speed degree velocity score
The total number of points of work, a team can accomplish in each scrum period is called velocity.
The high data growth speed is another thing is currently a problem. In a way, this problem is closely related to the data volume problem, because the speed of data created is generally directly proportional to the data volume. Data not only come in large numbers but also in a shorter tempo and even some that are real-time.
The burden of storing and processing data in a data warehouse will be more useful if it is utilized for data that is directly related to the business - transaction, financial and consumer data.
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a 2 mm diameter meteor of specific gravity 2.9 has a speed of 6 km/s at an altitude of 50,000 m where the air density is 1.03 x 10-3 kg/m3. if the drag coefficient at this large mach number condition is 1.5, determine the deceleration of the meteor.
A 2 mm diameter meteor of specific gravity 2.9 has a speed of 6 km/s at an altitude of 50,000 m where the air density is 1.03 x 10-3 kg/m3. if the drag coefficient at this large number condition is 1.5, 5km/s is the deceleration of the meteor.
A material's density in respect to a standard substance is determined by its specific gravity, also referred to as relative density. When comparing the densities of solids like meteor and liquids, water is commonly used as a reference because it has a density of one kilogram per litre at 4 °C (39.2 °F) (62.4 pounds per cubic foot). At standard conditions (0 °C and 1 standard atmosphere), dry air, which is widely used to compare gases, has a density of 1.29 grams per litre (1.29 ounces per cubic foot). For instance, liquid mercury has a density of 13.6 kg per litre and a specific gravity of 13.6. Even though it has a standard density of 1.976 grams per litre, the gas carbon dioxide has a specific gravity of 1.53 (= 1.976/1.29). The ideas of specific gravity and buoyancy, or an object's propensity to float in water or the atmosphere, are interrelated.
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the flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.47 rad/s2. it accelerates for 24.7 s, then maintains a constant angular velocity. calculate the total angle through which the wheel has turned 59.5 s after it begins rotating.
The flywheel of a steam engine starts revolving at rest with a constant angular acceleration of 1.47 rad/s2, therefore the wheel has rotated across a total angle of 1709.67 rad after 59.5 seconds.
To answer the question, we write down the flywheel's motion equation as 2 = 1 + t.
Where:
Initial angular velocity for the body is 0 rad/s in equation (1) Initial and final angular velocities
Time is equal to 24.7 seconds and angle acceleration is 1.47 rad/s2.
After entering the values, we discover that 2 2 = 0 + 1.35 rad/s2* 24.7 s = 38.205 rad/s.
Thus, 540.60075 rad + 1169.073 rad = 1709.67375 rad 1709.67 rad is the equation for the total angle the flywheel covered in 59.5 seconds.
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two slits of widtheach in an opaquematerial, are separated by a center-to-centerdistance ofa monochromatic light ofwavelength 450 nm is incident on the double-slit. one finds a combined interference anddiffraction pattern on the screen.(a) how many peaks of the interference will beobserved in the central maximum of thediffraction pattern?(b) how many peaks of the interference will beobserved if the slit width is doubled whilekeeping the distance between the slits same?(c) how many peaks of interference will beobserved if the slits are separated by twice thedistance, that is,while keeping thewidths of the slits same?(d) what will happen in (a) if instead of 450-nmlight another light of wavelength 680 nm isused?(e) what is the value of the ratio of the intensityof the central peak to the intensity of the nextbright peak in (a)?(f) does this ratio depend on the wavelength ofthe light?(g) does this ratio depend on the width orseparation of the slits?
The distance between the slits and the fringe width are inversely proportional. When the distance between the slits is doubled, the fringe's width is reduced by half.
What diffraction and interference pattern is mixed on the screen?
Diffraction. Interference is described as occurring when waves from two different independent sources have differing wavefronts. Diffraction, on the other hand, is described as secondary waves that split off from the primary wave.
Therefore, each wavelength's waves will produce a different type of interference pattern if white light is employed in Young's experiment instead of monochromatic light. The overall result of all these designs may be seen on the screen. Consequently, the middle white fringe.
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