Which of the following correctly describes the formula for speed? a. speed equals direction plus time b. speed equals distance plus direction c. speed equals distance over time d. speed equals mass over time

What should the power status of a circuit be when measuring resistance with an ohmmeter?

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.

What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34