A lift of mass 400kg is hung by a wire. Calculate the tension in the wire when the lift is at rest.

Every object that has mass attracts every other object with a gravitational force. It has been proven that the size of the gravitational force increases as the objectsÍ masses increase but graviational force decreases rapidly as the distance between

List all the planets in the solar system and their features

Blow up a balloon and rub it against your shirt a number of times. In doing so you give the balloon a net electric charge. Now touch the balloon to the ceiling. On being released, the balloon will remain stuck to the ceiling. Why?

Does mechanical advantage have units? Explain your answer.

Explain how gamma rays are produced by energy

Objects become electrically charged as a result of the transfer of

How many electrons do most atoms seek to have on their valence shell? Using this information, explain why certain elements are unreactive and why other elements are reactive.

Which of the following statements is good advice to prevent becoming overly emotional? A. There is no way to prevent becoming overly emotional. B.

An ant is on the pendulum bob of a clock. What would be its displacement in one time period?

Every charged particle in the universe is surrounded by its own? A. both an electric and gravitational field B. Gravitational field C. Charged field D. Electric field E. Both and electric and charged field