Compared to the recoiling cannon, a fired cannonball has a

A) greater momentum.
B) greater kinetic energy.
C) smaller speed.
D) all of the above


Answer: B

Physics & Space Science

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Suppose the star Sirius were moved to a distance 7 times closer to Earth than it is now. How would its parallax angle change?

A) It would stay the same. B) It would get smaller. C) It would get larger.

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The quantum mechanical model of the hydrogen atom requires that if the principal quantum number = 4, there will be how many permitted orbital quantum numbers?

a. 2 b. 4 c. 8 d. 16 e. 32

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How many water molecules are there in 36 g of water? Express your answer as a multiple of Avogadro's number NA. (The molecular structure of a water molecule is H2O.)

A) 36NA B) 2NA C) 6NA D) 18NA E) none of the above

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Ultraviolet light has wavelengths that are ________ visible wavelengths.

A. the same energy as B. slower than C. shorter than D. faster than E. longer than

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