People are able to hear footsteps because the sound made by a foot hitting the floor travels through the air to reach their ears. is this absorption or transmission

A scientific hypothesis must be

Select the correct answer. Which type of current is produced by a wire breaking magnetic field lines and changing the polarity? A. alternating B. direct C. straight D. alternating and direct

A glass bottle of soda is sealed with a screw cap. The absolute pressure of the carbon dioxide inside the bottle is 1.60 105 Pa. Assuming that the top and bottom surfaces of the cap each have an area of 3.

When light travels from air to water at an angle which of the following happens? a) The light slows down and it changes direction away from the perpendicular. b) The light slows down and it changes direction towards the perpendicular.

An electrical current can produce which type of force? A. chemical B. gravitational C. magnetic D. nuclear

Use combustion by moving pistons which respond to a change in pressure

If q1 is 2μC, q2 is 5μC and r1 = 0.2m, then the force between the charges is

On a weather map places that have the same temperature are joined with lines called

Which of the following generally speed up a reaction? A. increasing the activation energy B. removing any catalysts C. adding more heat D. shaking the container holding the reaction

Cual es el peso de 5L de un fluido que tiene una densidad 3.5 veces mayor que la del agua?