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On his 25th birthday, Peter leaves his twin Paul behind on the earth and goes off in a straight line for 7 years of his time at a speed of 0.96c. Peter then reverses direction and returns at the same speed.
What are the ages of Peter and Paul at the moment of reunion?
A solar collector is placed in direct sunlight where it absorbs energy at the rate of 910 J/s for each square meter of its surface. The emissivity of the solar collector is e = 0.79. What equilibrium temperature does the collector reach? Assume that ..
A light but rigid stick is attached to a small weight. The other end of the stick is attached to a pivot. The pivot allows the stick and weight to spin in a vertical circle. how fast should the weight be thrown downward
A rod of mass M and length L is hanging from one end on africtionless axis. What is the maximum height the rod and ball reach after the collision
an electron passes through a point 2.55 cm from a long straight wire as it moves at 31.3 of the speed of light
A car is traveling at 85.1 km/h at this speed the car has a fuel efficiency of 14.5 km/L. What is the average flow rate of gasoline
A force of 40.0 N is required to pull a 10.0-kg wooden block at a constant velocity across a smooth glass surface on Earth. What force would be needed to pull the same wooden block across the same glass surface on the planet Jupiter?
a force of 40.0 n is applied to a crate to displace it by 50.0 m. how much work is done on the crate by this
calculate the altitude of geosynchronous satellite, calculate the speed needed to move this mass from the surface fo the Earth to the altitude of 3R_E
The speaker and two microphones shown in the figure are arranged inside a sealed container filled with neon gas. What is the speed of sound in neon gas
You throw a snowball horizontally from the roof of a building that is 56.0 m above flat ground. The initial speed of the snowball is 11.0 m/s. How long does the projectile remain in the air
Two spheres having masses M and 2Mand radii R and 3R, respectively, How fast will each sphere bemoving when they collide
A ball rolls of the top of a stairway with a horizontal speed of 2 m/s. The steps are 20 cm high and 16 cm wide. Which step will the ball hit first
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