Which of the following is a vector quantity A, time
B, distance
C, displacement
D, speed

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.