You are standing on a bathroom scale in an elevator that is not moving and it reads 500 N. The elevator then moves downward at a constant velocity of 4.50 m/s. What does the scale read?
A. 100 N
B. 450 N
C. 500 N
D. 750 N
E. 250 N
C. 500 N
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The magnetic fields of Uranus and Neptune are peculiar in that they are
a. highly inclined to their planet's axis of rotation. b. very weak (virtually zero). c. produced by the solar wind. d. produced by disturbances caused by the orbits of the moons. e. all of the above
A beam of X-rays at a certain wavelength are scattered from a free electron at rest and the scattered beam is observed at 45.0° to the incident beam. What is the Compton shift?
A) 1.75 × 10-13 m B) 2.76 × 10-13 m C) 0 m D) 3.56 × 10-13 m E) 7.11 × 10-13 m
A spaceship departs from the solar system (event A) and travels at a constant velocity to a distant star. It then returns at a constant velocity, finally returning to the solar system (event B). A clock on the spaceship registers which of the following kinds of time between these events?
A. Proper time B. Coordinate time C. Space time interval D. Proper time and space time interval E. Coordinate time and space time interval F. All three
Visible light from a distant star can be spread into a spectrum by using a glass prism or
A) a diffraction grating. B) adaptive optics. C) a telescope. D) a flat glass mirror.