What is the smallest angle over which we can tell two objects (like stars) apart as distinct? Diffraction resolution

Spectroscopic limit

Angular resolution

Refraction resolution

What properties of a moving object are used in determining the object's energy of motion

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?