A stone falls from rest from the top of a cliff. A second stone is thrown downward from the same height 2.1 s later with an initial speed of41.16 m/s. They hit the ground at the sametime. How long does it take the first stone to hit the ground? The acceleration of gravity is 9.8 m/s2.Answer in units of s.

Alandscaper is shopping for landscaping materials. she wants to use materials through which water flows easily. which materials should she choose? check all that apply. clay gravel granite rocks with cracks loosely packed soil

What characteristics of hv2112 make it the best candidate to be classified as a thorne-zytkow object?

An electron is trapped at a defect in a crystal. the defect may be modeled as a one-dimensional, rigid-walled box of width 1.00 nm. (a) sketch the wavefunctions and probability densities for the n 1 and n 2 states. (b) for the n 1 state, nd the probability of nding the electron between x1 0.15 nm and x2 0.35 nm, where x 0 is the left side of the box. (c) repeat (b) for the n 2 state. (d) calculate the energies in electron volts of the n 1 and n 2 states