This question was a concept question on my physics test.
"two identical stones are dropped from rest and feel no airresistance as they fall. stone a is dropped from height h, andstone b is dropped from height 2h. if stone a takes time t to reachthe ground, stone b will take time:
a. 2t
b. t/2
c. 4t
d. t/sqrt(2)
e. sqrt(2)*t"

Identify the arrows that show the correct direction of heat transfer. 66°f 112°f 98°f

What was the first instrument to ever record an earthquake?

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.