What Chemicals are released from the brain and why does it help you become happier

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

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.

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force