Why hydrogen atom does not emit X-rays?

a) it has only one electron b) it has narrow energy levels

c) it has far apart energy levels d) it is the lightest patricle.

Which of the following best illustrates chemical potential energy a dog Plane, gasoline gasoline, water moving down hill, a skydiver about to jump out of a plane

Which feature of an object affects its weight? Select three options. A. mass of the object shape of the object B. shape of the object C. location of the object D. how much energy the object has E. how much force Earth exerts on the object

What is the final speed of a skater who accelerates at a rate of 2.0m/s^2 from rest for 3.5s? Show your work

You throw a 20-n rock vertically into the air from ground level. you observe that when it is a height 16.0 m above the ground, it is traveling at a speed of 24.7 m/s upward.

Based on what you learn about jovian moons by watching the videos or reading your textbook, what types of evidence for recent or ongoing geological activity have been observed on one or more jovian moons? a.

An example of objects the move in revolution

How many hops does a kangoroo do in 1 day

What are the average velocity and average acceleration of the tip of a 2.4 cm long hour hand of a clock?

What is the number one and most important rule to remember in soccer?

Why are convection currents; why are they hotter and colder parts of earth