Sound waves cannot travel in a vacuum because
a. there is nothing for them to travel through
b. there can be no waves of any kind in a vacuum
c. they cannot get up enough speed
d. their wavelengths are too long

State the right hand rule of the direction of magnetic field in a conductor carrying current

25pts the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

An object starts from rest at point f and speeds up continuously as it moves around an oval. a. choose a point about 1/8 th of the way around the oval from point f, and label it point g. draw a vector to represent the velocity of the object at point g. b. determine the change in velocity vector   between points f and g.