What is seven multiplied by seven plus 45?

During any process, the net electric charge of an isolated system does not change.

A 3.0 kilogram object is acted upon by an impulse having a magnitude of 15 Newton•seconds. What is the magnitude of the objects change in momentum due to this impulse?

Which one of the following substances is a liquid fuel used in rocket engines? A. Codium nitrate B. Ammonia C. Potassium perchlorate D. Liquid oxygen

A small rescue helicopter has 4 blades, each 4m long and 50kg in mass, and it carries a load of 1000kg. a) Find the rotational kinetic energy in the blades when rotating at 300 rpm.

In which part of the scientific method do you sum up your results

A car traveling 26 m/s starts to decelerate steadily. It comes to a complete stop in 13 seconds. What is it's acceleration. ___m/s^2

Less work was done. What is one possible reason why this has happened? A. There was more force applied; therefore, there was less movement. B. There was less force applied; therefore, there was more movement. C.

What are the optimal conditions for using a solar oven?

What is the magnifying power of an astronomical telescope using a reflecting mirror whose radius of curvature is 5.5 mm and an eyepiece whose focal length is 2.9 cmcm? Follow the sign conventions.

Who was the first person to observe a sign of molecular motion?