Electrons in excited hydrogen atoms are in the

n = 3 energy level. How many different photon

frequencies could be emitted as the atoms return

to the ground state?

(1) 1 (3) 3

(2) 2 (4) 4

How long will a plane have to fly continuously with 900 miles per hour in order to cover the same distance as that from Earth to the next star, Proxima Centauri?

What equations can you use to solve for maximum height?

A resultant occurs by combining two or more vectors, and a component occurs when a vector is split into its horizontal and vertical vectors.

18. A person pulls horizontally with a force of 64 N on a 14-kg box. There is a force of friction between the box and the floor of 36 N. Find the acceleration of the box in m/s2.

A 75,000 N weight truck hits the rear bumper of the 15,000 N weight car at a stop light. What is the ratio of the collision force the truck puts on the car compared to the force the car puts on the truck? A. 5:1 B. 2:1 C. 3:1 D. 1:1

Determine the magnitude of the effective value of g⃗ at a latitude of 60 ∘ on the earth. assume the earth is a rotating sphere.

What characteristic of a planet determines the acceleration due to gravity on it?

Which set of terms best defines what affects kinetic energy and potential energy, respectively? position, gravity gravity, position velocity, height height, velocity

You are operating a powerboat at night. You see green and white lights on another boat. What should you do?

How does Newton's second law apply to an "Egg Drop" experiment?