Answer the following statement(s) true (T) or false (F)
1. According to our conventional frame names, the Home Frame is the frame at rest.
1. FALSE
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Projectile Motion: At target practice, a rifle bullet is fired at an angle of 30° below the horizontal with an initial velocity of 800 m/s from the top of a cliff 80 m high. How far from the base of the cliff does it strike the level ground below if air resistance is negligible?
Fill in the blank(s) with the appropriate word(s).
Which of the following statements does not use the term angular size or angular distance correctly?
A) The angular size of the Moon is about 1/2 degree. B) The angular distance between those two houses in the distance is 30°. C) The angular distance between those two bright stars in the sky is about 2 meters. D) The angular size of the Sun is about the same as that of the Moon. E) You can use your outstretched hand to estimate angular sizes and angular distances.
A bike (shown in a top view in the diagram) travels around a curve with its brakes on, so that it is constantly slowing down. Which of the arrows shown most closely approximates the direction of the bike’s acceleration at the instant it is at the position shown? (Hint: Draw a motion diagram.)
A. A
B. B
C. C
D. D
E. E
F. F
T. T
A superconducting electromagnet makes use of
A) zero resistance coils of wire. B) super-high temperatures. C) high-speed electrons. D) close packing of high-density magnetic domains.