Insolation refers to Select one:
a. the amount of sunlight that reaches a planet.
b. the spherical shape of Earth.
c. the imaginary line that runs around Earth’s middle.
d. the amount of heat energy contained in a beam of sunlight.

In the 1980's, congress authorized the u.s. department of energy to build the wipp facility in the chicuahuan desert in new mexico. what is the purpose of wipp?

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects