What structure allows only certain things to pass in and out of the cells

A student standing on a roof throws a ball toward the sky. He then tries to make an energy transfer diagram for the ball. What should go in the blank in the diagram? A) Heat energy B) Light energy C) Useful energy D) Electrical energy

A fish swimming at a constant speed of 0.5 m/s suddenly notices a shark appear behind it. 5 seconds later the fish is swimming in the same direction at a speed of 2.5 m/s What is the fish, s acceleration

Which best describes the transition from gas to liquid? A. Energy must be removed because particles in liquid move more slowly. B. Energy must be added because particles in liquid move more quickly. C.

An electric current is produced using a bar magnet and a solenoid. Which changes will cause a decrease in the electric current produced? Check all that apply.

During a medical evaluation the Doctor can

How do a joule a watt and a Newton relate to each other

Say you want to make a sling by swinging a mass M of 1.9 kg in a horizontal circle of radius 0.042 m, using a string of length 0.042 m. You wish the mass to have a kinetic energy of 15.0 Joules when released.

List three ways that electromagnetic radiation is used to improve our everyday lives.

Suppose an electron and a proton move at the same speed. which particle has a longer de broglie wavelength? suppose an electron and a proton move at the same speed.

The apparent displacement of an object as it is viewed from two different positions is known as A. parallax. B. a parsec. C. a light-year. D. an arcsecond.