Which of the following is best determined by applying the principles of relativity and uncertainty, as opposed to those of Newtonian physics?
A. The position of a train
B. The velocity of a bungee jumper
C. The position of a particle in a particle accelerator
D. The length of an accelerating sprinter

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.

Auniform crate c with mass mc is being transported to the left by a forklift with a constant speed v1. what is the magnitude of the angular momentum of the crate about point a, that is, the point of contact between the front tire of the forklift and the ground

Contains chemical energy. a. heat b. light c. natural gas