A ________ is a body whose only acceleration is the downward acceleration due to gravity.
What will be an ideal response?
projectile
freely falling body
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A ball is thrown straight up with a speed of 30 m/s, and you can neglect the presence of air. (a) How long does it take the ball to reach the maximum height? (b) What is the maximum height reached by the ball? (c) What is its speed after 4.2 s?
What will be an ideal response?
A picture window in a house is 3 feet high by 5 feet long. If the window is 50ºF and the outside air temperature is -10ºF, estimate the heat transfer by natural convection from the window.
What will be an ideal response?
Active galactic nuclei are usually powered by supermassive black holes
Indicate whether the statement is true or false
A supercluster refers to a large group of stars within the Milky Way
Indicate whether the statement is true or false