What type of star is white in color and relatively dim.?

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?

Often called simply "velocity," this is the velocity of an object at a particular moment in time.