Energy conservation means

a. slowing down a chemical change.

b. burning a fuel to release energy.

c. using fossil fuels to produce electricity.

d. reducing energy use.

Which example is a body fossil? a) dino bones b) shrimp burrow c) dino footprint d) an ornithopod track

What do you think your weight would be if you were floating in space a long way from any planets? Explain your answer.

Two children push on opposite sides of a door during play. Both push horizontally and perpendicular to the door. One child pushes with a force of 17.5 N at a distance of 0.600 m from the hinges, and the second child pushes at a distance of 0.450 m.

Beyond the petition Neptune a field of smaller bodies orbits the Sun. Some scientists think these objects are the remains of material that formed the early solar systems. Use what you know about how solar systems form to evaluate this hypothesis.

When applying the process of science which of theseis tested 1. a question, 2. an observation, 3. a conclusion, 4. a prediction

When a car crashes, do you think its speed can make a difference in the amount of damage done?

An 8000-n car is traveling at 12 m/s along a horizontal road when the brakes are applied. the car skids to a stop in 4.0 s. how much kinetic energy does the car lose in this time?

The graph shows that the molecules in a liquid do not all have the same speed

When the air under the envelope is heated, the balloon lifts. Which of the following statements is true?

A bullet of mass 6.00g is fired horizontally into a wooden block of mass 1.20kg resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.160.