Give an example of a system whose mass is not constant.

1. A spinning top

2. A baseball flying through the air

3. A rocket launched from Earth

4. A block sliding on a frictionless inclined plane

Suppose you are holding a basketball while standing still on a skateboard. You and the skateboard have a mass of 50kg. You throw the basketball with a force of 10N. What is your acceleration before and after you throw the ball?

Which trait is determined entirely by heredity? A. Fashion sense B. Interest in reading C. Shape of the nose D. Thinking ability E. Math skills

Relationship of electric current to voltage

The cause of a fire in a computer is described as an incorrectly wired circuit. Which statement best explains the likely cause of the fire? The wiring contained a short circuit, so the reduced resistance caused an increase in current.

If two things collide, where does the lost energy go? Is it transferred into other forms?

Which physical quantities has the unit kg·m·s-1?

Can an object travel at the speed of light? Why or why not?

Determine the amount of potential energy of a 5 Newton's book that is moved to three different shelves on a bookcase. The height of the shelves is 1.0 meter, 1.5 meter, and 2.0 meter

Which atom is involved in giving your heart energy to beat? carbon gold oxygen iron

Which of the following is the most accurate statement concerning the properties of matter? a. they can be written as symbols b. they can be observed and measured c. they cannot be tested or verified d. they change with the amount of matter present