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A certain star is 18.6 light-years away. How long would it take a spacecraft traveling 0.950c to reach that star from Earth, as measured by observers?
a) On earth
b) On the spacecraft
c) What is the distance traveled according to observers on the spacecraft
d) What will the spacecraft occupants calculate their speed to be from the results of b) and c)
A large circular capacitor with a radius of 5 m is separated by 3 mm of air. Suppose 9 V is placed across the capacitor. What is the charge magnitude that builds up on the two plates
Light of wavelength 420 nm is incident normally on a film of water 1.0 µm thick. The index of refraction of water is 1.33, What is the wavelength of the light in the water
A certain type of laser emits light that has a frequency of 5.4 x10^14 Hz. The light, so, occurs as a series of short pulses, each lasting for a time of 2.7 x10-11 s.
The height of an empty can is H, and the mass M. The mass of a full can is m, What is the center of mass of the can as a function of x? h is the height from the bottom to the surface
a 10 atmospheric dump valve adv at a pwr relieves steam at 1100 psia when the enthalpy required to make a pound of
astronauts use a centrifuge to simulate the acceleration of a rocket launch. the centrifuge take 20.0 seconds to reach top speed, what is the astronauts tangential acceleration during the first 20.0 s
a pulley having a rotational inertia of 1.0x104 gcm2 and a radius of 10 cm is acted upon by a force applied
How much current is contained within the width of a thin ring concentric with the wire if the ring has the radial width of 12.0 µm and is at a radial distance of 1.2 mm.
A 11.7-m-radius Ferris wheelrotates once each 32 s. What is the linear speed of a passenger
Two large metal plates of area 1.0m2 face each other. They are 5.0cm apart and carry equal and opposite charge on their inner surfaces. what is the charge on the plates
A vertical spring has one end attached to the ceiling and a 2.50 kg weight attached to the other one. find how fast the weight is moving
One mole of gas is at a pressure of 7.00 atm and a temp of 26.0 Celsius. If the gas is heated at a constant volume until it pressure triples, evaluate what is the final temperature
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