Help me please please answer me

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

What is a subatomic particle with a negative charge and very little mass?

If a car is traveling on the highway at a constant velocity, the force that pushes the car forward must be a. equal to the weight of the car. b. less than the force of friction exerted upon the car. c. equal to the force of friction exerted upon the car. d. greater than the weight of the car.