Two students push on a box in the same direction and a third student pushes in the opposite direction. What is the net force on the box if each push with a force of 50 N?
A.50 N towards the side with one student
B.50 N towards the side with two students
C.150N

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?

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.