What material would make the best heating element for an electric range?
a. a resistor, which converts some electric energy to thermal energy
b. an insulator, which stops the flow of electricity
c. a conductor, which carry electric currents
d. a conductor surrounded by an insulator

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?

According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?

Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match