For an isolated system, the sum of the kinetic and potential energies over time.
A. gradually changes up and down
B. increases gradually
C. decreases gradually
D. always remains the same

There are weak or strong attractive forces between atoms of liquids with a high viscosity

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?