An electrical discharge excites the He atom from its ground state (arbitrarily assigned the energy E1 = 0) to its excited state of 20.61 eV. The excited He atom collides with a Ne atom in its ground state and excites this atom to the state at 20.66eV. Neon atoms make a variety of downward transitions in falling from the E4* down eventually to level E1. This laser can produce a green or a red laser beam. From the data in the figure, (a) what is the wavelength of the red He–Ne laserlight? And (b) If the green light has a wavelength of 543 nm, what is the energy E2?

answer; /// the above statement is (true);

c) up is the direction the magnetic force is acting on the charge.

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.

1.195000

explanation:

total mass=0.0117+0.0137+0.0881+0.0111

total mass= 0.01172kg

total velocity = 0.283-0.743+0.871-0.799+0.155+0.637+0.301=0.102

momentum=mv=0.1172*0.102=1.195000//