What is the net charge of a copper atom if it gains 2 electrons?

Name two objects that have a low density.

A change in velocity means a change in?

when moving a couch you exert a force of 400 N and push it 4.0 how much wokr have you done on the couch

Water is sold on half-liter bottles. What is the mass, in kg and in g, of the water in such a full bottle?

An astronomer would most likely use the doppler effect to question 12 options: 1) measure the color of a star. 2) measure the parallax of a star. 3) measure the brightness of a star. 4) measure the shift in the emission spectrum of a star.

1.) State which definition of power below is correct. A.) the energy transferred per hour. B.) the energy transferred. C.) the energy transferred per second. D.) the force over a distance. 2.

Science and technology are closely related, but not the same. Which of the following is most likely a result of technology, not science?

Ashlee pours some quantity of orange juice in a glass. She accidentally breaks the glass and juice spills all over the floor. Which characteristic of the juice will change? A. mass B. State C. Shape D. Volume

A car travels along a straight road at a steady 40 MPH. Are the forces on the car balanced or unbalanced? Explain.

Why doesn't a ball roll forever after being kicked at a soccer game!