What is the density of a body which having a volume v (body) = 40cm ^ 3 ,it floats on oil half submerged. Density of oil d = 900 kg / m ^ 3.

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?