What does the frequency of a wave represent?

A)the distance between two consecutive crests

B)the number of wave cycles that pass through a specific point within a given time period

C)the distance between the highest and lowest points of a wave

D)the length of wave that pass through a specific point within a given time period

A1200 kg car traveling north at 10 m/s is rear-ended by a 2000 kg truck traveling at 30 m/s. what is the total momentum before and after the collision?

Which of these metals are magnetic?

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?