Which phrase best describes speed?
a. rate of change in position due to have motion
b. total change in position as described by distance and direction
c. rate of change in velocity
d. rate of motion

Luminous objects such as flashlights emit light that we can see. how do we see an object that isn’t luminous? a. the object emits light that reaches our eyes. b. light reflects off the object and reaches our eyes. c. light passes through the object uninterrupted. d. light is fully absorbed by the object. e. we can’t see an object that isn’t luminous.