What unit is used to measure loudness and at what level can hearing loss happen?

What is something that claims to be science but is not?

sympathetic preganglionic fibers; release ACh parasympathetic preganglionic fibers; release ACh parasympathetic postganglionic fibers; release NE sympathetic postganglionic fibers; release NE

Which is a base? 1) Substance C is formed from the reaction of an acid and a base. 2) Substance A gives off H + ions that combine with OH - ions when dissolved in water.

Based on the law of conservation of energy. how can we reasonably improve a machines ability to do work? A. move the machine to a different gravitational field B. increase the friction between its moving parts C.

A 500-kg roller coaster car travels with some initial velocity along a track that is 5 m above the ground. The car goes down a small hill and then coasts back up a higher hill. The second hill is 12 m above the ground.

What is it called when you connect an object to earth with a conductor

Why is venus the hottest planet in the solar system

Which of the following is an example of an electromagnetic wave? A. ripples on a lake B. the honking of a car horn C. the light from a neon sign D. aftershocks from an earthquake

How fast can we travel in space with current technology?

How would the tides on earth be different if the moon revolved around the earth in 15 days instead of 30 days