Which part of the ear amplifies the vibrations from sound waves?

A. outer ear

B. inner ear

C. middle ear

D. both a and b

Bright sunlight is reflected from an icy pond. You look at the glare of the reflected light through polarized glasses. When you take the glasses off, rotate them 90∘, and look through one of the lenses again, the light you see becomes brighter.

a pitcher throws a fastball horizontally toward home plate 18.39 meters away. If the ball is traveling at a speed of 40.0m/s, neglecting air friction, how long does it take for the ball to get to home plate

How do scientists know that dark matter exists? a. it absorbs radio waves. b. it emits electromagnetic radiation. c. it exerts a gravitational pull on other matter. d. it blocks the light coming from other objects.

According to ___, the volume of a gas increases with increasing temperature, as long as pressure does not change. A. Bernoulli's Principle B. Boyle's Law C. Charles's Law D. Archimedes' Principle

On pluto, a baby would weigh 2.7 newtons. how much does this baby weigh on earth?

Six light bulbs are connected in series with a 9.0 volt battery. What is the voltage across each bulb?

Can an object travel at the speed of light? Why or why not?

It's a hot and sunny day and you decide to go for a drive. When you open your car door, it's a lot hotter than outside. Why is that

Which compound is composed of oppositely charged ions

Sara, who weighs 66 kg, is on a guilt trip after eating a 788-Calorie (788 kcal) breakfast of pancakes loaded with fruits, cream, and syrup. She decides to work out before going to her weekly weight-watchers' meeting.