An athlete participates in a discus throw competition during an Olympiad that takes place in a city where acceleration due to gravity is 9.80 m/s2. He throws the discus with an initial velocity of 20.0 m/s at an angle of 30.0° above the horizontal
Neglecting the height of the discus at the point of release, what is the range of the discus? A) 35.3 m
B) 20.4 m
C) 40.0 m
D) 60.0 m
E) 50.0 m
A
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An instrument is thrown upward with a speed of 15 m/s on the surface of planet X where the acceleration due to gravity is 2.5 m/s2 and there is no atmosphere. How long does it take for the instrument to return to where it was thrown?
A) 12 s B) 6.0 s C) 10 s D) 8.0 s
What is the physical difference between light and a radio wave?
A) Light waves have a higher frequency than radio waves. B) Light is an electromagnetic wave while radio is a pressure wave in air. C) Light waves have a longer wavelength than radio waves. D) Light waves have a larger amplitude than radio waves. E) None of the above.
An ideal gas is confined to a container with constant volume. The number of moles is constant. By what factor will the pressure change if the absolute temperature triples?
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