Akid is on a stationary sled, on
snowy ground with pls = 0.125.
it takes 61.2 n of force to set
the sled moving. what is the
mass of the kid and sled?
(unit = kg)

Why there is no inductive reactance in dc circuits

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?