When a body moves in circular motion at constant speed
a. the velocity and acceleration point in the same direction.
b. the velocity and acceleration point in opposite directions.
c. the velocity and acceleration point perpendicular to each other.
d. the acceleration is zero.
e. none of the above.
c
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Which of the following elements is NOT produced in a Type Ia supernova?
A. Neon B. Nickel C. Cobalt D. Iron E. Silicon
If an astronaut landed on a planet composed of antimatter, there would be an explosion and the
A) planet would annihilate. B) astronaut would annihilate. C) astronaut and an equal amount of planet antimatter would both annihilate.
If the velocity versus time graph of an object is a horizontal line, the object is
A) moving with zero acceleration. B) moving with constant non-zero acceleration. C) at rest. D) moving with increasing speed.
What is the frequency, in hertz, of a sound wave (v = 340 m/s) with a wavelength of 68 m?
a. 5 Hz b. 23120 Hz c. 340 Hz d. 0.2 Hz