17. Two rocks are thrown off a cliff at the same height. Rock A is thrown horizontally at 0 degrees with a velocity of 14 m/s and lands 45m from the base. Rock B is dropped straight down from
the outside edge of the cliff.
If both rocks were released simultaneously, which one should strike the ground first?

A-Depends on height of cliff
B-Rock A
C-Rock B
D-They will strike the ground at the same time

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

Adolphin emits ultrasound at 100khz and uses the timing of reflections to determine the position of objects in the water. part a what is the wavelength of this ultrasound? assume that temperature of water is 20 degrees c. answer in cm

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.