Explain that a universe is a large collection of billions of galaxies and is expanding continuously?

1. why does the sun have the greatest amount of gravity in our solar system?

What is calculated by the equation KE = 1/2mv2? A) Potential Energy B) Kinetic Energy C) Work-Kinetic Energy Theorem D) Gravitational Potential Energy E) Elastic Potential Energy

Explain how energy is conserved when nuclear fission or fusion occurs

In your own words, explain why sound waves cannot travel in space.

How could a person easily tell which envelope contained four sheets of paper and which contained five sheets without opening the envelopes what assumption did you make in arriving at your answers

Calculate the speed of a wave on a guitar string which has a mass of 55 g and a length of 30 cm if the tension in the string is 200 N

During a free fall Swati was accelerating at - 9.8m/s2. After 120 seconds how far did she travel? Use the formula = 1/2 * t2 to solve your answer. (Do not forget to keep units in your answer.)

How do sinkholes form?

What is the result of wave motion on water particles? A.) Water particles are pushed forward as they move up and down. B.) Water particles barely move forward as they move up and down. C.) Water particles are pushed down as they move side to side. D.

Nitric acid (HNO3) and potassium hydroxide (KOH) combine in a neutralization reaction to form water and a salt. Which of the following correctly identifies the salt that is produced? OHK NOK2 KNO3 HOH