In a solution what is the substance being dissolved?

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

Anne applies a force on a toy car and makes it move forward. what can be said about the forces acting on the toy car at the moment anne applies the force?

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?