What is heat?

describe how you could made a sound wave have a higher pitch.

describe how you could make a sound wave have a higher volume.

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

The metric unit of electrical power is the watt volt ampere ohm

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?