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Kinetic and Potential Energy Concepts

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Questions and Answers

What is the equation for kinetic energy?

KE = mu^2/2 (correct)

KE = mu^2

KE = mu

KE = 1/2(mu^2)

What happens to an object's kinetic energy when it accelerates?

It remains constant

It increases (correct)

It decreases

It becomes zero

Which of the following objects has potential energy?

An object moving at constant linear speed

An object with zero mass

An object in a force field (correct)

An object at rest

Which of the following statements is true about energy?

Energy can be converted from one form to another Signup and view all the answers

Why do objects tend to move towards lower energy states?

Because lower energy states are more stable Signup and view all the answers

What is the relationship between kinetic energy and potential energy?

An object can have both kinetic energy and potential energy at the same time Signup and view all the answers

What is the definition of matter in chemistry?

Anything that has both mass and volume Signup and view all the answers

What is the science of chemistry concerned with?

The composition, structure, properties, and reactions of matter, and the interaction of matter with energy Signup and view all the answers

What is an example of an aggregate of molecules?

A polymer Signup and view all the answers

What branch of chemistry deals with the study of minerals, rocks, and meteorites?

Geochemistry Signup and view all the answers

What is the term for the types and amounts of simpler substances that make up matter?

Composition Signup and view all the answers

What is the term for the category of matter that includes thick or thin films, alloys, and composite solids?

Materials science Signup and view all the answers

What is a characteristic of a chemical change?

It involves a change in the composition of a substance Signup and view all the answers

What is the primary type of change occurring when frost forms on a humid winter night?

Physical change, as water vapor changes state to solid Signup and view all the answers

Which of the following is an example of energy?

A ball moving across a room Signup and view all the answers

What is the difference between a physical and chemical change?

A physical change involves a change in state, while a chemical change involves a change in composition Signup and view all the answers

Which process is an example of a chemical change?

A silver fork tarnishing slowly in air Signup and view all the answers

What is a characteristic of a physical change?

It is always reversible Signup and view all the answers