Two small, identical conducting spheres repel each other with a force of 0.025 N when they are 0.55 m apart. After a conducting wire is connected between the spheres and then removed, they repel each other with a force of 0.070 N. What is the original charge on each sphere

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

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

The pressure proportional to the area a- inversely b- directly c- increase d-decrease