calculate the velocity of the bob of a simple Pendulum at its mean position , if it is to rise to a vertical height of 10cm. g=980cm per second squared.

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational