What two aspects of a force do scientists measure?
a) magnitude and direction
b)position and size
c) size and stability
d)strength and magnitude

Heat from the sun reaches earth to a. radiation b. convection c. conduction

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

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.