When a race begins, a racecar accelerates from zero to 200 km/h in 4.80 seconds. What is its average acceleration?

If a clock aboard a space ship traveling at 0.900 c of the speed of light relative to earth chimes once at the beginning of the hour and again when it reads one hour later, how much time would an observer on earth say elapsed between the two chimes?

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of