The color of a star is

A) unimportant

B) determined by its location in the galaxy

C) cannot be determined

D) determined by its temperature

Which of the following are not clues that a chemical reaction has taken place? A. Steam B. Formation of a gas C. Change in color D. Constant temperature

When a collapsed core becomes so dense that only neutrons can exist there?

100 ml of water is initially at 20°C. 30,000 J of heat is added to the water. What is temperature change for the water?

Which device manages the flow of current in an electric circuit? the wire the lightbulb the battery the switch

Why does the momentum of a billiard ball rolling on a billiard table change?

Which of the following is an example of applied research?

A Cadillac Escalade has a mass of 2,569.6 kg, if it accelerates at 4.65 m/s^2 what is the net force on the car?

If you are trying to balance a seesaw and you have a higher mass on the left, should the mass on the right be placed at a greater distance or lower distance to balance it? Why?

A car travels 300 km in the first 3 hours of a trip. Then it hits traffic and travels only 60 km during the last hour. What is the average speed of the car? a.) 180 km/h b.) 100 km/h c.) 90 km/h d.) 120 km/h

What is the purpose of using a wedge? A. separates objects B. keeps objects together C. allows you to exert force over a distance