Which best summarizes a concept related to the worvenergy theoren? •When work is positive, the environment does work on an object.
•When work is negative, the environment does work on an object.
•When work is positive, the kinetic energy in a system remains constant.
•When work is negative, the kinetic energy in a system remains constant.

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

What are the dimensions of the cross section that passes through the points a, f, g, and d?