The best description of a light-year is a) the speed of light in a vacuum. b) the age of a one-year-old star. c) the distance light travels in a year. d) the time it takes light to travel from earth to the sun.

Which car has the most kinetic energy? a. a car of mass 1000 kg with a speed of 3 m/s b. a car of mass 2000 kg with speed 7 m/s c. a car of mass 1000 kg with speed 7 m/s d. a car of mass 2000 kg with speed 3 m/s

Slab pull” is a type of tectonic plate movement that occurs due to the forces of mantle convection and results in the subduction of the lithosphere true or false

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical