A 500N person stands in an elevator that is moving downward at constant speed. The force that the floor exerts on the person must be

A) 500N upward

B) 500N downward

C) less than 500N upwards

D) less than 500N downward

What two simple machines are found in a bike?

To make ice, a freezer that is a reverse Carnot engine extracts 42 kJ as heat at - 13°C during each cycle, with coefficient of performance 5.9. The room temperature is 30.9°C.

Cita 3 situaciones de tu vida cotidiana que mediante una fuerza produzcas: movimiento de un cuerpo en reposo el cambio en el movimiento de un cuerpo una deformacion de un cuerpo

You are pedaling a bicycle at 9.8 m/s. the radius of the wheels of the bicycle is 51.9cm. the angular velocity of rotation of the wheels is

In electromagnetic waves, the magnetic fields are---? - - - to the electric fields.

Match these terms with their definitions: 1. unit of electrical resistance ampere 2. unit of electromotive force or electrical potential ohm 3. unit for measuring the strength of an electric current volt 4. unit of electrical power watt

In which is momentum conserved: an elastic collision or an inelastic collision?

List the types of radiation in order from least to most damaging.

Which of the following statements best describes the current state of understanding regarding the apparent acceleration of the expansion of the universe?

Should young people be allowed to do extreme sports? (give me two reasons why) 1. Opinion: 2. Reason why: 3. Reason why: