What's the difference between the speed and velocity of an object?

What was the revolution in atomic theory produced by the discovery of the electron?

How much time would it take for the sound of thunder to travel l, 500 meters

When an Gravitational field it has energy in its what energy store

Which of the is a trait in humans that is determined by multiple alleles

A rightward-moving truck skids to a stop from a very high speed with its wheels locked. What forces are exerted on the object?

People have proposed driving motors with the earth's magnetic field. This is possible in principle, but the small field means that unrealistically large currents are needed to produce noticeable torques.

A hot air ballon with a mass of 500kg ascends at a constant rate of 1.5 m/s for 20s. how much work is done by the upward force?

A construction team gives an estimate of three months to repave a large stretch of a very busy road. The government responds that it's too much inconvenience to have this busy road obstructed for three months, so the job must be completed in one

Determine the time needed for the load at b to attain a speed of 10 m/s, starting from rest.

A tea kettle is warmed on an electric stove. After a while, water vapor builds inside the kettle and causes a whistle in the lid to make a sound. How does this demonstrates the first law of thermodynamics?