Alight-year is the distance light travels in one year, at a speed = 2.998 x 10^8 m/s.

(a) how many meters are there in 1.00 light years?
(b) an au is the average distance from the sun to the earth, 1.50 x 10^8 how many au are there in 1.00 light-year?
(c) what is the speed of light in au/h?

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?

Lightning is an example of what phenomenon? a release of a large amount of energy an absorption of a large amount of energy a natural electric circuit a natural electric current