What kind of energy transformation in a stereo

A una distancia de 12.0 m dsde una fuente puntual, el nivel de intensidad es de 70dB. A que distancia desde la fuente el nivel de intensidad sera de 40dB.

Let's say you pour an ounce of water from a class into a bowl. Does the water's mass change?

You are trying to determine the identity of an unknown metal object using density. You measure the volume by displacement using a graduated cylinder. The initial volume is 14.7 mL, and the final volume is 23.5 mL.

Background noise affects hearing tests. In the ticking watch test, what type of result, in terms of auditory sensitivity, would you have recorded if moderate background noise were present?

Why do power plants emit such a high percentage of pollutants?

Correct unit of speed

Technician A says that for best results, loosen the fastener immediately after spraying it with penetrating oil. Technician B says that rusted fasteners may be loosened by tapping with a hammer. Which technician is correct? a. technician A only b.

A roller coaster track is 3,000 meters long. It takes 100 seconds to travel once around the roller coaster. Is the velocity constant throughout the trip? Explain.

Why does the air pressure inside the tires of a car increase when the car is driven?

If you were to drop a clay ball and a rubber ball of the same mass from the same height, which would have a greater change of momentum after they hit the ground?