Describe what happens to the electric field lines when two objects with unlike charges are brought near each other.

Which have a positive charge? neutrons atoms protons electrons

What is the current through a 75 W lightbulb when it is connected to a standard (110 V) line?

Which of the following is true for the angular momentum of rotating bicycle wheel

Recent results from very bright supernovae in very distant galaxies seem to indicate that the expansion of the universe Select one: a. is continuing at a constant rate and has done so since just after the Big Bang. b.

When you are ice skating, to get started, you push your skate backwards on the ice and, as a result, begin to move forward. Which law of motion is being described in this scenario?

Use your observations to determine qualitatively how the strength of the electric interaction between charged objects depends on the distance between them. Explain your reasoning (this is trickier than it might seem at first).

Far from any other masses, two masses, m1 and m2, are interacting gravitationally. The value for the mass of m1 suddenly doubles. What happens to the value of the gravitational force that mass m2 exerts on mass m1?

Which of the outer planets are most like Earth? How?

The pressure inside a champagne bottle can be quite high and can launch a cork explosively. Suppose you open a bottle at sea level. The absolute pressure inside a champagne bottle is 6 times atmospheric pressure; the cork has a mass of 7.

Using a cathode ray tube, Thomson confirmed that atoms must have an overall positive charge. atoms are made of particles that have a negative charge. electrons in atoms must have varying amounts of energy. electrons are only found in the nucleus.