Atelescope was used to photograph two distant stars, but the photograph only shows what appears to be one star.

what term is used to describe the ability of an optical instrument to distinguish between two closely spaced objects?

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.