Which one of these is a chemical change?

A.) Melting Ice

B.) Making powdered juice

C.) Cutting paper

D.) Burning a log

Which of the following is a pair of vector quantities? a. speed - distance b. velocity - distance c. velocity - displacement d. speed - displacement

Student groups are given an unknown liquid to test using the four indicators. One group conducts the tests and records these results.

This statement about matter and its behavior is best classified as a.

A day is defined as the time it takes for a planet to orbit once on its axis, while a year is defined as the time it takes for a planet to orbit the sun once. Which planet has a longer day than year?

What is an advantage of forced air heating? A) it requires little energy to run. B) it is energy efficient C) it cleans the air

What is the weight of atmosphere on Earth?

The noble gases are the least what of any elements on the periodic table

Why is friction between moving parts of machines undesirable?

What holds down earths atmosphere in its place?

A person catches a ball with a mass of 145 g dropped from a height of 60.0 m above his glove. His hand stops the ball in 0.0100 s. What is the force exerted by his glove on the ball? Assume the ball slows down with constant acceleration.