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Chapter 36: Q. 33 (page 1060)
A 1.0 g particle has momentum 400,000 kgm/s. What is the particle’s speed in m/s?
The speed of particle is.
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An out-of-control alien spacecraft is diving into a star at a speed of . At what speed, relative to the spacecraft, is the starlight approaching?
You are standing at and your assistant is standing at Lightning bolt strikes at and lightning bolt strikes at You see the flash from bolt at and the flash from bolt at According to your assistant, were the lightning strikes simultaneous? If not, which occurred first, and what was the time difference between the two?
A cube has a density of while at rest in the laboratory. What is the cube’s density as measured by an experimenter in the laboratory as the cube moves through the laboratory at of the speed of light in a direction perpendicular to one of its faces?
In the earth’s reference frame, a tree is at the origin and a pole is at km. Lightning strikes both the tree and the pole at . The lightning strikes are observed by a rocket traveling in the -direction at .
a. What are the spacetime coordinates for these two events in the rocket’s reference frame?
b. Are the events simultaneous in the rocket’s frame? If not, which occurs first?
Particle A has half the mass and twice the speed of particle B. Is the momentum less than, greater than, or equal to ? Explain.
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