A 2 ųC charge and a -12ųC charge are placed as shown on the x-axis. Where would a -10ųC charged be placed so the 2ųC would receive a net force of zero? Answer in centimeters
What charge would be placed at 18 cm so the net force on the -12ųC charge is zero?
Answer in ųC

A10.0 kg cart and a 15kg cart are locked together with a compressed spring between them. they are then released so that the spring pushes the two carts apart. the 10.0 kg cart is moving at 4.5 m/s afterward. how fast is the 15kg cart moving? 3.0 m/s 2.0 m/s 4.5 m/s 5.0 m/s

What is the most useful equation for electric power?

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.