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
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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.
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
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
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