The charge of an atom from an excited state to the ground state always requires

a. an increase in electron energy

b. release of visible light

c. absorption of energy

d. emission of electromagnetic radiation

What can be said about q and k immediately after an increase in temperature exothermic?

Two gliders collide on an air track. Glider 1 has a mass of 7.0 kg, and glider 2 has a mass of 4.0 kg. Before the collision, glider 1 had a velocity of 2.0 m/s, and glider 2 had a velocity of - 5.0 m/s.

How high will a ball go if thrown at 10m/s up?

If a 4 Ω resistor, a 7 Ω resistor and a 12 Ω resistor are connected in parallel, which resistor has the most current in it? 4 Ω 7 Ω 12 Ω They all have the same.

Phenolphthalein turns pink in salt water

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.

A ball is rolled along the inside of a partial hoop lying flat on a table. which path will the ball follow when it gets to the end of the hoop?