A laser beam with vacuum wavelength 573 nm is incident from air onto a block of Lucite as shown in the figure below. The line of sight of the photograph is perpendicular to the plane in which the light moves. Take ?1 to be 61
In: Physics
Mass on a spring
1-By doubling the mass of the objet attached to the spring the period of the oscillations will change by a factor of
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4 |
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0.5 |
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1.4 |
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2 |
2-According to Hook's Law, the force of a spring is proportional to
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-the change in the length of the spring |
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-the length of the spring |
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-the mass of the spring |
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-the change in the mass of the spring |
3-The units for the spring constant are
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-N/m |
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N |
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-N/kg |
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-m/s2 |
4- A 0.26kg object is placed at the end of a vertical spring. The unstretched (natural) length of the spring is 0.24m. After adding the mass the final length is 0.38m. What is the spring constant (in N/m)?
5- A 0.39kg object is placed at the end of a vertical spring with a spring constant k=23.43N/m . Assuming the spring is massless, what would be the period of oscillations (in s) ?
6- In the previous problem, what is the theoretical value for the period of oscillations, if the hanging mass is 0.2kg and the spring is massless?
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2s |
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1s |
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0.6s |
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1.4s |
7- In the previous problem what is the theoretical value for the period of the oscillations, if the mass is 0.2 kg and the mass of the spring is 0.15 kg?
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2.1 s |
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-1.2 s- |
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- 0.67 s |
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- 1.5 s |
8- The period of oscillations for a mass spring system would ___ if the experiment was done on the surface of the moon. NOTE: The acceleration due to gravity on the surface of the moon is 1/6th of the acceleration due to gravity on Earth.
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quadruple |
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double |
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- increase by a factor of 6 |
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stay the same |
9- The potential energy of a mass-spring system when the spring is fully compressed and the mass is at rest is 200 J. After releasing the mass, assuming there is no dissipative force, the system will oscillate. At a point during the oscillation the potential energy of the system is 50 J. What is the kinetic energy of the mass at that point, assuming the spring is massless?
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50 J |
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250 J |
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150 J |
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200 J |
In: Physics
The proper mean lifetime of a muon is 2.2ms. Muons in a beam are traveling through a laboratory at 0.95c.
1. What is their mean lifetime as measured the laboratory?
2. How far do they travel, on average, before they decay?
Please show expressions, work, and a proper explination!!!
In: Physics
A 0.26 kg mass is attached to a light spring with a force constant of 36.9 N/m and set into oscillation on a horizontal frictionless surface. If the spring is stretched 5.0 cm and released from rest, determine the following.
(a) maximum speed of the oscillating mass
m/s
(b) speed of the oscillating mass when the spring is compressed 1.5
cm
m/s
(c) speed of the oscillating mass as it passes the point 1.5 cm
from the equilibrium position
m/s
(d) value of x at which the speed of the oscillating mass
is equal to one-half the maximum value
m
In: Physics
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Problem 24.96 Infinite positively charged sheet 1 has uniform surface charge density σ1 = +2.0 nC/m2 and is located in the yz plane of a Cartesian coordinate system. Infinite negatively charged sheet 2 is parallel to sheet 1 and has uniform surface charge density σ2 = -5.0 nC/m2 . Sheet 2 is 4 m to the right of sheet 1 along the +x axis. |
Part A Determine the magnitude and direction of the electric field in region I, to the left of sheet 1. Express your answer with the appropriate units. Enter positive value if the field is in positive x direction and negative value if the field is in negative x direction.
SubmitPrevious AnswersRequest Answer Incorrect; Try Again; 4 attempts remaining Part B Determine the magnitude and direction of the electric field in region II, between the two sheets. Express your answer with the appropriate units. Enter positive value if the field is in positive x direction and negative value if the field is in negative x direction.
SubmitRequest Answer Part C Determine the magnitude and direction of the electric field in region III, to the right of sheet 2. Express your answer with the appropriate units. Enter positive value if the field is in positive x direction and negative value if the field is in negative x direction.
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In: Physics
(a)One end of a string is attached to a wall and the
other end is attached to a mass sitting on a ramp tilted at an
angle of 35 degrees. It takes a pulse 10 ms to travel the length of
the 1 m string. The string has a mass 1.5 g. What is the mass that
is attached to the string?
(b) The string is replaced by two strings that are
knotted together, L1 has a length 60 cm and L2 has a length of 40
cm. They have a linear mass density of of mu1 =
1.4 x 10-4 kg/m and mu2 = 2.8 x
10-4 kg/m. Like before, they are attached to the
mass you found in part a. A pulse is sent from each end of the
string. Which pulse meets the knot first?
In: Physics
Suppose I pour 13.5 mL of creamer into 159 mL of hot coffee. The creamer is at 43.4 deg F, and the coffee is at 188 deg F. What is the final temperature when the system reaches equilibrium, in deg F? Assume coffee and creamer have the same density and thermal properties of water.
In: Physics
Three people talk simultaneously. If the intensity level is 92 dB when either one speaks alone, what is the intensity level when both speak at once?
In: Physics
Two converging lenses are separated by 29.00 cm. The focal length of each lens is 17.00 cm. An object is placed 32.00 cm to the left of the lens that is on the left. Determine the final image distance relative to the lens on the right.
In: Physics
In: Physics
5 kg of saturated liquid water at 10 bars is contained in a piston-cylinder assembly and undergoes two processes. process 1-2: heated at constant pressure until it is saturated vapor. process 2-3: cooled as it is compressed at constant volume until it reaches 110 degrees celsius. determine the overall work and heat transfer for these processes. Hint: Must used linear interpolation from values in the correct Water tables.
In: Physics
Projectile Motion: If you launch projectile horizontally and drop a stone at the same time from the same height, which one will strike the ground first. Explain why. Assume no air resistance. (Hint: they actually will hit the ground at the same time. HMMM... why?)
Projectile Motion: If you launch a cannon at 15 degrees above horizontal, and another cannon at 75 degrees above horizontal, which one will reach farther horizontal range? Explain your answer.
In: Physics
you have a toy car running on two batteries. if you could hook it up wit only one of the batteries, it would draw
a)twice as much current as the two batteries
b) half as much current as the two batteries
c) the same amount of current as the two batteries
why??
In: Physics
A fullback with a mass of 116 kg and a velocity of 2.7 m/s due
west collides head-on with a defensive back with a mass of 89 kg
and a velocity of 6 m/s due east.
(a) What is the magnitude of the fullback's initial momentum?
(b) What is the direction of the fullback's initial momentum?
(c) What is the magnitude of the defensive back's initial
momentum?
(d) What is the direction of the defensive back's initial
momentum?
(e) What is the magnitude of the total momentum of the
system?
(f) If they stick together and external forces can be ignored, what
direction will they be traveling immediately after they
collide?
In: Physics
Using Maxwell's equations and the variety of forms, how do you think that such a wave can self-propogate without a constant source of radiation?
In: Physics