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.

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.

Which of the following is not a physical property of mattera. melting pointb.heat of combustionc. viscosityd. boiling point