Electrons are modeled using a "cloud" around the nucleus because they

Which of the following is the most important reason why simple harmonic motion will not continue forever in most real-world situations? a. frictional effects dissipate energy. b. the restoring force is not strong enough. c.

Radioactive isotopes Select one: a. have an excess number of electrons. b. behave the same chemically, physically, and biologically as other isotopes. c. have an excess number of neutrons. d. are produced when substances are exposed to radiation. e.

A large truck and a small car have a head-on collision. Which scenario is true? A. The truck exerts a greater force on the car than the car exerts on the truck. B. The car exerts a greater force on the truck than the truck exerts on the car. C.

In a sealed tank is a large sprig of Elodea and a snail. The tank is kept for several weeks on a sunny window sill. Both the plant and snail live and appear to be healthy.

When you step on the accelerator to increase the speed of your car, the force that accelerates the car is: A. the force of your foot on the accelerator B. the force of friction of the road on the tires C. the force of the engine on the drive shaft D.

Which is the relationship between photon energy and frequency?

Two like charges are separated by some distance. Describe the quantitatively what will happen to the force exerted by one charge on the other ifa) the distance between the charges is doubledb) the distance between the charges is halvedc) one of the

A chemical is one or two letter used to represent an element

A student throws a 5.0-newton ball straight up. What is the net force on the ball at its maximum height? (1) 0.0 N (3) 5.0 N, down (2) 5.0 N, up (4) 9.8 N, down

An object starts from rest and falls freely for 40. meters near the surface of planet P. If the time of fall is 4.0 seconds, what is the magnitude of the acceleration due to gravity on planet P?