Earthquakes occur on the earth today, so we can assume they occurred in the past. which important geologic principle does this sentence support?

a. superposition
b. original horizontality
c. uniformitarianism
d. faunal succession

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

Aflute player hears four beats per second when she compares her note to a 523 hz tuning fork (the note c). she can match the frequency of the tuning fork by pulling out the “tuning join” to lengthen her flute slightly. what was her initial frequency?