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How fast must a rocket travel on a journey to and from a distant star so that the astronauts age 12.0 years while the Mission Control workers on earth age 110 years and as gauged by Mission Control, how far away is the distant star?
A straight object of length 2.7 cm lies along the central axis of a spherical mirror with focal length 8.5 cm. What is the length of its image in the mirror
Does the gravitational potential energy at the initial and final points depend upon the location of the origin of the coordinate system? Does the change in gravitational potential energy dependupon the location of the origin of the coordinate system..
An object falls off of a pier and into the ocean (sea water) where it displaces a total volume of 3.4 cubic meters of sea water. What is the buoyant force acting on the object in newtons
An adult exerts a horizontal force on a sewing that is suspended by a rope of length L, holding it at an angle x with the vertical. The child in the swing has a weight W and dimensions that are negligible compared to L.
The moment arm of the should abductor muscles is approximately 5 cm from the axis of roation of shoulder joint, calculate the horizontal component of the joint reaction force
A 1.23-kg box slides up an incline plane with a speed of 8.6 m/s. how long will it take for the box to come to rest
a patient has a far point of 39.5 cm and a near point of 21.4 cm. what power in diopters should be prescribed to
When you push a 1.80-kg book resting on a tabletop, it takes 2.45 Nto start the book sliding. What is the frictional force exerted on the book
Two electrons in the same atom both have n = 9 and = 3. (Keep in mind that the electrons are indistinguishable) How many different states are possible? How many different states would be possible if the exclusion principle were inoperative?
Explain how much mechanical energy is lost due to friction acting on the runner? How far does he slide?
A cylindrical tank with a large diameter is filled with water to a depth D = 0.25 m. A hole of cross section A = 6.1 cm2 in the bottom of the tank allows water to drain out. What is the rate at which water flows out
Force F = (-5.0 N) i hat + (5.0 N) j hat acts on a particle with position vector r = (-3.0 m) j hat + (5.0 m) k hat. What is the angle between the directions of force and torque
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