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

The Balmer series is formed by electron transitions in hydrogen that a. begin on the n = 1 shell. b. end on the n = 2 shell. c. end on the n = 1 shell. d. are between the n = 1 and n = 3 shells. e. begin on the n = 2 shell.

A mass of 5 kg stretches a spring 10 cm. The mass is acted on by an external force of 10 sin (t/2) N (newtons) and moves in a medium that imparts a viscous force of 2 N when the speed of the mass is 4 cm/s.

10 fact of polution solution

A circular track begins at O meters and has a total distance of 100 meters. Juliet starts at the 10-meter mark while practicing for a race.

Terms used to measure motion

a machine is required to produce and output force of 600 newtons. if the machine has a mechanical advantage of 6, what input force must be applied?

Small air bubbles rise slowly while big bubbles rise rapidly through the liquid. why?

Photosynthesis and respiration are important because they produce or breakdown food to release energy.

Tech A says a camshaft position sensor must be positioned correctly to accurately signal the position of the camshaft to the powertrain control module in the ignition module.

The starship enterprise returns from warp drive to ordinary space with a forward speed of 50 km/s. to the crew's great sur - prise, a klingon ship is 100 km directly ahead, traveling in the same direction at a mere 20 km/s.