How long does it take for light from a star that is 8 light-years away to reach earth?

A.

8 earth minutes

B.

16 earth minutes

C.

8 earth years

D.

16 earth years

How much energy in calories does it take to melt 10 grams of ice?

Where are elements with few valence electrons found on the periodic table

If a 1000-pound capsule weighs only 165 pounds on the moon, how much work is done in propelling this capsule out of the moon's gravitational field?

What name is given to a generator which produce alternating current

In a 100. m race, Lisa crosses the finish line after 11.3 s. Accelerating uniformly, Lisa took 1.85 s to attain maximum speed, which she maintained for the rest of the race. What was Lisa's acceleration?

Two sinusoidal waves are moving through a medium in the positive x-direction, both having amplitudes of 7.00 cm, a wave number of k=3.00m-1, an angular frequency of ω=2.50s-1, and a period of 6.00 s, but one has a phase shift of an angle ϕ=π12rad.

Which season does the Southern Hemisphere experience when it is tilted toward the sun? A. winter B. summer C. spring D. autumn

For an ideal fluid flowing through a horizontal pipe, Bernoulli's principle and the continuity equation state that the pressure within the pipe does which of the following? (Assume measurements are taken along the pipe in the direction of fluid flow.

A bowling ball has a mass of 40kg and is kicked with a force of 10 N. What is it's acceleration

Sciencium-380 has a half-life of 3 days. If you started with a 100 gram sample, how much Sciencium-380 will remain after 9 days?