An element becomes a positively charged ion when it

loses protons.

loses electrons.

gains electrons.

gains neutrons.

Select the correct answer from each drop-down menu. Jupiter's strength of gravity is greater than Earth's strength of gravity. A person's heightmassweight will be the same on Jupiter and Earth.

An adiabatic expansion refers to the fact that:

if a car, in order to pass a truck, speeds up uniformly from 45 km/h to 70 km/h in 8 s, what would be the acceleration of the car in meters per second squared?

How many foot-pounds of work does it take to throw a baseball 90 mph? a baseball weighs 5 oz, or 0.3125 lb?

In a fission reaction of U-235 there was a release of 9.20x1011kJ of energy. What amount of mass in grams would have been lost? Recall that c = 3x108 m/s. Select one of the options below as your answer: A. 1.02 x 10-2 B. 1.02 x 101C. 1.02 x 109 D. 8.

Explain what force caused the continents to move from one super continent to there current form

A 5 kg ball approaches a wall at a speed of 4 m/s. It then bounces off the wall in the opposite direction at the same speed. What is the magnitude of the average force exerted on the ball if it is in contact with the wall for 0.1 s?

When a basketball player dribbles a ball, it falls to the floor and bounces up. Is a force required to make it bounce? Why? If a force is needed, what is the agent involved?

Compare the friction force on the cart when it is rolling along the blacktop parking lot to the friction force on the cart when it is inside the grocery store (assume the flooring is smooth vinyl tile).

Which of the following objects has the most kinetic energy? a car going 60 miles per hour a spring that is compressed a rock sitting on the edge of a cliff a bicycle going 10 miles per hour