You drop a 30 g pebble down a well. you hear a splash 2.7 s later. ignoring air resistance, how deep is the well? assume g = 9.8 m/s2.

a)0.79 m
b)36 m
c)71 m
d)790 m

As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is 100) a) static friction. b) kinetic friction. c) a combination of static and kinetic friction. d) neither static nor kinetic friction, but some other type of friction. e) it is impossible to tell what type of friction acts in this situation.

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.