How can the difference in the brightness of spectral lines be explained?

A person throws a 0.5 kg ball up in the air in 1.1 s. During this process the position of the ball changes from 0.5 m to 1.5 m (before being released) and the speed of the ball changes from 0 m/s to 7 m/s.

A 600 kg car is at rest, and then accelerates to 5 m/s. What is its original kinetic energy? J What is its final kinetic energy? J How much work was used? J

How can the mentos and soda experiment effect the real world?

When a potential difference is put across a wire, ___. a. electron speeds decrease b. electrons drift slowly toward the positive end of the wire c. conduction of electricity ceases d. electron energy lessens

A rock with mass m = 3.60 kg falls from rest in a viscous medium. The rock is acted on by a net constant downward force of F = 15.

A 2.0-kilogram laboratory cart is sliding across a horizontal frictionless surface at a constant velocity of 4.0 meters per second east. What will be the cart's velocity after a 6.0-newton westward force acts on it for 2.

A boat floats with 25% of its volume under water. a. What is the boatâs density? b. If the boat was made from 500 kg of metal, what is the volume of the boat? (Assume the air in the boat has negligible mass and density) c.

Why does each mineral have their own property, different from every other mineral?

Earth's tallest mountain ranges are found at plate boundaries

Is a lung a living organism, why or why not?