a body of mass 20 kg is set in motion by 3N 4N and acting at right angles to each other determine the magnitude of its acceleration

Aphysical change is a change in the size, shape,, or stafe of matter true or false

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.

Which atomic model was proposed as a result of j. j. thomson’s work?