You are helping your friend move a new refrigerator into his kitchen. You apply a horizontal force of 265 N in the positive x direction to try and move the 56 kg refrigerator. The coefficient of static friction is 0.69.

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

When an object is heated it contracts. a. true b. false

An ideal polarizer with its transmission axis rotated 30 degrees to the vertical is placed in a beam of unpolarized light of intensity 10w/m^2. after passing through the polarizer, what is the intensity of the beam? a. 8.7 w/m^2 b. 7.5 w/m^2 c. 5.0 w/m^2 d. 10 w/m^2 e. 2.5 w/m^2