Assume you have 3 light bulbs connected in a series circuit to a battery. What can you say about the current through each light bulb?
Current varies through all bulbs
There is no current through the bulbs
Current is the same through all bulbs

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.

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

How can waves travel through ground?