A granite block is being slid at a constant speed across a horizontal concrete floor by an applied force parallel to the floor. Which pair of quantities could be used to determine the coefficient of friction for the granite on the concrete? A.) frictional force and speed of the block

B.) mass and normal force on the block

C.) frictional force and normal force on the block

D.) mass and speed of the block

Two polarizers are oriented at 24.0∘ to one another. light polarized at a 12.0-degree angle to each polarizer passes through both. what is the transmitted intensity (%)?

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.

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation