A rock is thrown at a window that is located 18.0 m above the ground. The rock is thrown at an angle of 40.0° above horizontal. The rock is released from a height of 2.00 m above the ground with a speed of 30.0 m/s
If the rock strikes the window on its upward trajectory, from what horizontal distance from the window was it released? A)
53.2 m
B)
48.7 m
C)
71.6 m
D)
29.8 m
E)
27.3 m
E
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If the temperature and pressure of an ideal gas is tripled, what is the ratio of the new volume to initial volume?
A. 1 B. 9 C. 3 D. 0.33
Suppose David Ortiz hits a home run which travels 361. feet (110. m). Assuming it left the bat at 50.°, how fast was it hit?
What will be an ideal response?
When electric current is flowing in a metal, the electrons are moving
A) at nearly the speed of light. B) at the speed of light. C) at the speed of sound in the metal. D) at the speed of sound in air. E) at none of the above speeds.