What causes interstellar dust and gas to start to contract and form a protostar?

1) the shockwave from a supernova

2) nearby black hole

3) an increase in the solar wind

4) nuclear fusion

Water has the highest heat of vaporization of any liquid, which makes it very important in the temperature regulation of the human body. If 8.

Middle adulthood marks the time period in which some adults face the fabled midlife crisis. What exactly is that? Do you think you will go through one, or did you have one? Can it be avoided?

a 15 kg television sits on a shelf at a height of 0.3 m how much graviitional potential energy is added to the television when it is lifted to a shelf of height 1.0m

On the school playground, the slide is 7.4 feet west of the tire swing and 6.7 feet south of the monkey bars. During recess, Lucy plays on the tire swing first.

How is alternating current generated?

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

Determine the amount of potential energy of a 5 Newton's book that is moved to three different shelves on a bookcase. The height of the shelves is 1.0 meter, 1.5 meter, and 2.0 meter

Which atom is involved in giving your heart energy to beat? carbon gold oxygen iron

Which of the following is the most accurate statement concerning the properties of matter? a. they can be written as symbols b. they can be observed and measured c. they cannot be tested or verified d. they change with the amount of matter present

Danilo is sliding down a slide. What forces are acting on him as he slides