1. A rock is initially launched from ground level vertically reaching its highest point 4.2 seconds after being launched. Calculate the initial velocity of the
rock, to the nearest 100th, as the rock is launched. Calculate the maximum
height of the rock to the nearest 10th.
Explain and show all steps of your solution.

Find the dimensions and area of the largest rectangle that can be inscribed in the upper half of the ellipse. (give your answers in terms of a and b. enter the dimensions as a comma-separated list.)

How can waves travel through ground?

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=