What evidence did wegener make use of to develop the theory of continental drift? a the climate of siberia has always been the same. b there is no evidence of glaciers anywhere in south america. c the rocky mountains are taller than the appalachian mountains. d mountains in north america appear to be part of the same chain of mountains as those in northern europe.

The position of a dragonfly that is flying parallel to the ground is given as a function of time by r⃗ =[2.90m+(0.0900m/s2)t2]i^− (0.0150m/s3)t3j^. a: at what value of t does the velocity vector of the insect make an angle of 34.0 degree clockwise from the x-axis? b: at the time calculated in part (a), what is the magnitude of the acceleration vector of the insect? c : at the time calculated in part (a), what is the direction of the acceleration vector of the insect?

Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely

The necleus of an atom is made up of what subatomic particles?