A brick of mass 1kg travels to the right at 0.9c, where c is the speed of light. It collides with another brick of mass 2kg which is at rest before the collision. After the collision, the lighter brick has a speed of 0.35c, still to the right. What is the momentum of the heavier brick after the collision? Keep three significant digits. (Hint: be careful to use the relativistic expressions for momentum)

A particle has a rest mass of 7.15×10−27 kg and a momentum of 5.56×10−18 kg·m/s. Determine the total relativistic energy E of the particle.   Find the ratio of the particle's relativistic kinetic energy K to its rest energy ?rest.

An unstable particle at rest breaks up into two fragments of unequal mass. The mass of the lighter fragment is equal to 2.60 x 10° -28 kg and that of the heavier fragment is 1.66 × 10° -27 kg. If the lighter fragment has a speed of 0.893c after the breakup, what is the speed of the heavier fragment?

An unstable particle at rest spontaneously breaks into two fragments of unequal mass. The mass of the first fragment is m1 = 2.50 x 10-28 kg, and that of the other is m2 = 1.67 x 10-27 kg. If the speed of m1 is equal to 0.893c after the breakup, where c = 3 x 108 m/s.  What is the final speed of m2?

An unstable particle at rest breaks up into two fragments of unequal mass. The mass of the lighter fragment is equal to 2.00 x 10-28 kg and that of the heavier fragment is 1.61 x 10-27 kg. If the lighter fragment has a speed of 0.893c after the breakup, what is the speed of the heavier fragment? C

Consider the inelastic collision. Two lumps of matter are moving directly toward each other. Each lump has a mass of 0.500 kgand is moving at a speed of 0.910?. The two lumps collide and stick together. Answer the questions, keeping in mind that relativistic effects cannot be neglected in this case. What is the final speed ?f of the combined lump, expressed as a fraction of ?? ?f=   ? What is the final mass ?f of the combined lump immediately after the collision, assuming that there has not yet been significant energy loss due to radiation or fragmentation? ?f=

Antimatter: When a particle and its anti-particle collide, energy and momentum are conserved. However, the particles can annihilate each other and produce two gamma rays - high energy photons. An electron and an anti-electron each have a rest mass of 9.11 × 10-31 kg. Suppose the particles are each accelerated to a speed of 0.98c in a particle accelerator with a length of 1543 m for a head on collision. (Each particle is moving at this speed with respect to the lab, and the particles are moving in opposite directions.) They collide head on and annihilate. What is the wavelength of the gamma rays produced in this collision?

A particle initially has a speed of 0.37c. (Enter your answers in terms of c. Round your answers to at least three decimal places.) (a) At what speed does its momentum increase by 1%? 0.41 X с (b) At what speed does its momentum increase by 10%? (c) At what speed does its momentum increase by 100%?

A proton moves with a speed of 0.86c. Find the speed of an electron that has the same momentum and kinetic energy. (Express the answer as the quantity of one minus a number times c.) same momentum ) x C (1 (1 same kinetic energy ) XC Need Help? Read It -

A particle is moving at  0.75c relative to a lab on Earth. By what percentage is the Newtonian expression for its momentum in error? (The percentage error is the difference between the erroneous and correct values, divided by the correct one).