When an atom loses an electron, it becomes a

a. positive ion.

b. negative ion.

c. neutral ion.

d. neutral atom.

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What is the amount of mass in a given volume called?

Which pulls harder gravitationally, the Earth on the Moon, or the Moon on the Earth? Which accelerates more? a. The Moon on the Earth; the Moon. b. The Moon on the Earth; the Earth. c. The Earth on the Moon; the Earth. d. Both the same; the Moon. e.

4 The diagram shows a girl lifting a box of welght 50 N from a low shelf to a high shelf. high shelf low shelf 11.8m 50N 0,6 m How much work is done on the box? A. 30J B. 60J C. 90J D. 120J

Which of the following is associated with fusion but not fission? OA. Radioactive waste OB. Mass-energy equivalence OC. Uranium OD. Hydrogen

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If the abosolute of a gas is 600 k, the temperature in degrees Celsius is

How does an electromagnetic wave propagate itself? a. A changing magnetic field induces an electric field perpendicular to the magnetic field. b. A changing electric field induces a magnetic field perpendicular to the electric field. c.

Which of the following is an example of convection? A. hot air rising and cooler air falling B. a hot object transferring heat to a cooler one C. a hot oven warming the air around it D. the rays of the Sun warming the earth

A 50,000 kg locomotive is traveling at 10 m/s when its engine and brakes both fail. How far will the locomotive roll before it comes to a stop? Assume the track is level.