Two organ pipes are meant to be the same length, but apparently they are not. When played simultaneously the beat frequency heard is 2.4 Hz. If the fundamental frequency of the first pipe is 228 Hz, by what fraction is the first pipe different in length than the second?
A. 2%
B. -2%
C. -1%
D. Impossible to determine
E. 1%
D. Impossible to determine
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Which is heaviest?
A) oxygen atom B) hydrogen atom C) electron D) proton E) water molecule
Two masses, MA and MB, with MB = 2MA, are released at the same time and allowed to fall straight down. Neglect air resistance. When we compare their kinetic energies after they have fallen for equal times, we find that
a. KB = KA. b. KB = 2KA. c. KB = 4KA. d. KA = 2KB. e. KA = 4KB.
A block is placed in oscillation on a frictionless horizontal surface attached to a spring that is also attached to a wall. If, when stretched away from equilibrium by 15 cm and released, it oscillates with a period of 0.25s, and if the mass of the block is 15 kg, what force was required to stretch the spring by the initial 15 cm?
A. 230 N B. 450 N C. 710 N D. 360 N E. 1400 N
"Gibbous" means a nearly full moon. If I see a waxing gibbous moon tonight, what moon phase will I see in one week?
A) waxing crescent B) waxing gibbous C) waning gibbous D) waning crescent