If we want to describe work we must have

Many years ago, people believed that the sun rotated around the earth. Eventually, evidence was discovered that indicated this idea might not be accurate. What was the likely result of this discovery?

An electron and a proton have the same kinetic energy and are moving at speeds much less than the speed of light. Determine the ratio of the de Broglie wavelength of the electron to that of the proton.

The weight of a body above the surface of the Earth is inversely proportional to the square of its distance from the center of the Earth. What is the effect on the weight when the distance is multiplied by 2 ? A. The weight is multiplied by 4. B.

Hydrogen gas was cooled from 150c to 50c. its volume is 75.0 ml. what was its original volume?

Maisie drags a 1kg mass along a table with a Newton meter so that it accelerates at 0.25 m/s. The Newton-meter reads 0.4N, calculate the force of friction between the mass and the table

To stretch a certain nonlinear spring by an amount x requires a force F given by F = 40 x - 6 x 2, where F is in Newtons and x is in meters.

A wave passes through an opening in a barrier. The amount of diffraction experienced by the wave depends on the size of the opening and the wave's (1) amplitude (3) velocity (2) wavelength (4) phase

Balanced - Forces acting on an object are balanced if the ... If forced on an object are balanced then the object cannot be ...

How are magnetic stripes near mid-ocean ridges evidence for sea-floor spreading?

If a truck has a mass of 2 x 106 grams and a velocity of 35m/s, what is its momentum? kgm/s a. 2 million b. 70 c. 57.14 d. 70,000 e. 57,100