Harry pulls on the end of a spring attached to a wall. The reaction to Harry's pull on the spring is
A) the wall pulling oppositely on the spring.
B) the spring pulling on Harry.
C) both the wall and the spring pulling on Harry.
D) none of the above
Answer: B
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Dr. Chuck projects a ball horizontally from a lab bench. The ball lands on a bullseye marked on the floor a horizontal distance away
Compared to the time for the ball to simply drop vertically from the bench, the time in the air for Dr. Chuck's projected ball is A) less. B) the same. C) greater.
The rms speed of a certain sample of carbon dioxide molecules, with a molecular weight of 44 g/mole, is 396 m/s. What is the rms speed of water molecules, with a molecular weight of 18 g/mol, at the same temperature?
A) 253 m/s B) 387 m/s C) 421 m/s D) 506 m/s E) 619 m/s
The Universe is _______________ because it looks the same in any direction you observe it
Fill in the blank(s) with correct word
How are surfaces of Mercury and the Moon similar? Different? Why?
What will be an ideal response?