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Why do optical astronomers put their telescopes on the tops of high mountains, while radio astronomers put their telescopes in deep valleys.
A space station shaped like a giant wheel has a radius of 105 m and a moment of inertia of 5.03 108 kgm2. A crew of 150 are living on the rim.
What is meant by the 'fine structure constant'? Explain what the fine structure constant tells us about the relative probability of the formation of a three par
Given that two bodies interact via some force, the accelerations of these two bodies have the same magnitude but opposite directions.
If electromagnetic wave equation for vacuum is
The speed of one marble is 2v and its mass is m; the speed of the other marble is v and its mass is 2m.
The centers of a 4.0-kg sphere and a 7.5-kg sphere are separated by a distance of 1.5 m. Where is the center of mass of the two-sphere system?
In the old west, a marshal riding on a train traveling 50m/s sees a duel between two men standing on the earth 50m apart parallel to the train.
A 1.0-kg ball has a velocity of 12 m/s downward just before it strikes the ground and bounces up with a velocity of 12m/s upward.
The Oh-My-God particle was an ultra-high-energy cosmic ray (most likely an iron nucleus) detected on the evening of 15 October 1991 over Dugway Proving Ground
With what velocity will the astronaut have to throw the empty tank away to get back to the orbiter?
An electron-positron pair moves with velocity v=c(beta) in frame O. Annihilation of the pair produces two photons of energies E1 and E2 emerging
In a certain road accident, a car of mass 1500 kg, traveling south, collided in the middle of an intersection with a truck of mass 7500 kg, traveling west.
Consider two particles of equal mass m. Determine the system mass for each of the following cases.
Assume that the transmission of the van is in neutral, the brakes are not being applied, and the collision is elastic.
A bullet of mass 0.1kg is fired into a block of mass 10kg initially at rest at the edge of a frictionless table of a height 2m.
A pion of mass m moves with a speed u in the positive y direction in frame S with parametrs BETAu = u/c and GAMMAu = (1 - BETAu^2)^-1/2.
Determine the temperature rise that results from the collision in terms of c and the other given quantities.
Use the Lorentz transformations to show that the spacetime interval is invariant ?s'2=?s2 for relative motion along one direction.
Show that the spacetime interval (delta s) is invariant under the lorentz transfermations:
A zero-momentum spinner has a momentum wheel spinning at 5000 rpm. The angular momentum of the wheel is 100 N-m-s.
Two spaceships approach the Earth from opposite directions. According to an observer on the Earth, ship A is moving at a speed of 0.753c
The radar antenna on a navy ship rotates with an angular speed of 0.22 rad/s. What is the angular speed of the antenna as measured by an observer
A softball of mass 0.221 kg that is moving with a speed of 6.5 m/s (in the positive direction) collides head-on and elastically with another ball initially.
What is the angular momentum of the system relative to the center of mass?What is the angular speed about the center of mass after collision?