Why do scientists assume that the early universe was much hotter and denser than the universe of today?

How changing the frequency and amplitude affect the sound heardby the listener? Higher amplitude results in louder volume and vice versa, while higher frequency results in higher pitch and vice versa

What is a transformer? Explain how a transformer works including specific details on step up and step down transformers

You travel 20.0 mph for 0.500 hour, 40.0 mph for 1.00 hour, 30.0 mph for 0.500 hour, and 50.0 mph for 2.00 hours. What is the total distance traveled?

Which of the following statements are true? a. Earth's geographic south pole is also a magnetic south pole. b. Scientists have evidence that single isolated magnetic poles, called magnetic monopoles, exist. c.

A substance that produces H + ion in a solution is an (n)

A snake accelerates from 2 m/s to 10 m/s in 4 seconds. What is the snakes acceleration? m/s2

What is the difference between speed and velocity

If an astronaut moved away from the earth towards the moon, how would the gravitational forces between the earth and the astronaut change? How would the gravitational forces between the moon and the astronaut change?

A race car starts from rest and speed up uniformly to the right until it reaches a maximum velocity of 60m/s in 15 sec

The magnitude of a velocity vector is called speed. suppose that a wind is blowing from the direction n45°w at a speed of 40 km/h. (this means that the direction from which the wind blows is 45° west of the northerly direction.