If a hydrogen atom has its electron in the n = 4 state, how much energy in eV is needed to ionize it?

I'm the absence of friction, gravity and all other external forces what kind of speed will an object display if it travels from the bottom to the top of an incline plane

How can coprolites tell scientists what a dinosaur might have eaten?

When frozen ice cream melts, the atoms in the ice cream move further apart. move closer together. become ions. become electrons.

Which factor most closely defines the bodyÍs ability to change direction? A. agility B. acceleration C. flexibility D. reaction time

When low on gasoline, is it better to increase or decrease the speed of the vehicle? Explain.

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?

What pattern of material movement found in the Earth system tracks how an element moves from living to nonliving parts? a. rock cycle b. calcium cycle c. carbon cycle d. none of the above

Why is the monolith el capitan in yosemite national park more resistant to erosion than other igneous plutons in the park?