A car travelling at 45 mi/hr (20.1 m/s) comes to rest in 4 seconds. Find the acceleration of the car in m/s2.

Electromagnetic and mechanical waves both transfer energy. How is an electromagnetic wave different from a mechanical wave? Question 4 options: a. An electromagnetic wave has frequency, and a mechanical wave does not. b.

A jetliner can fly 7.5 hours on a full load of fuel. Without any wind it flies at a speed of 2.14 x 102 m/s. The plane is to make a round-trip by heading due west for a certain distance, turning around, and then heading due east for the return trip.

Elevator mass 750kg tension on cable 8950n what is the net force action on the elevator

Assume that the sun is a sphere of radius 6.96 * 10⁸ m and that its surface temperature is 5.8 * 10³ K. If the sun radiates at a rate of 3.90 * 10²⁶ W and is a perfect emitter, at what rate is energy emitted per square meter at the sun's surface?

Explain why the density of the washcloth cannot change when it remains under water.

Your myth: Dogs and wolfs are the same species Fact: Evidence:

Friction is a force that speeds up motion between two surfaces that are in contact

Which actions are evidence that a chemical reaction has occurred? Check all that apply. A: a change in color B: the formation of a precipitate C: a clear liquid becoming cloudy D: a change in shape E: the formation of bubbles F: the formation of

Which sphere forms Earth's outermost layer? Atmosphere Biosphere Cryosphere Hydrosphere

an 100kg object traveling at 50m/s collides (perfectly inelastic) with a 50kg object initially at rest. what is the sum of the momentum of both objects prior to the collision?