If two firecrackers produce a combined sound level of 85 dB when fired simultaneously at a certain place, what will be the sound level if only one is exploded?

A 50-kg bicyclist coasts up a hill. What is the cyclist change in kinetic energy as her altitude changes from 15m to 20m? A) 0 joules B) approximately 2,500 joules C) approximately 7.500 joules D) approximately 10.000 joules

What determines the speed of a wave? Four sentences.

What does it mean to say an object is electrically polarized?

Jamal read a story on the Internet called "Barking Dogs Don't Bite." In the story, the main character told everyone that a dog that barks will not bite. Jamal remembered that he had been bitten the previous summer by a dog that first barked at him.

In a double-slit interference experiment you are asked to use laser light of different wavelengths and determine the separation between adjacent maxima.

When energy is transformed, the amount of usable energy?

If an object weighs 39.2 n on earth, what is its mass

What happens when pressure is applied to a solid.

A box of mass 1 kg is hung from a spring scale. The reading on the spring scale is approximately 10N. What would be the reading on the spring scale if a box of mass 5 kg is hung from it? (Assume acceleration due to gravity to be 10 m/s2.

under what conditions could the angular momentum of the closed system of isolared student, stool, and masses change