This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A collection of atoms has 20 of the sample in a state 5.9 eV above the ground state. If these ... (Read 74 times)

cherise1989

  • Hero Member
  • *****
  • Posts: 555
on: Jul 29, 2018
A collection of atoms has 20 of the sample in a state 5.9 eV above the ground state.
 
  If these emit coherent radiation, what is the wavelength of the laser light produced? (c = 3.00  108 m/s,
  h = 6.626  10-34 J  s, 1 eV = 1.60  10-19 J)
  A) 210 nm
  B) 91 nm
  C) 340 nm
  D) 34 nm

Question 2

The resistivity of gold is 2.44  10-8   m at room temperature. A gold wire that is 1.8 mm in diameter and 11 cm long carries a current of 170 mA. How much power is dissipated in the wire?
 
  A) 0.030 mW
  B) 0.0076 mW
  C) 0.013 mW
  D) 0.019 mW
  E) 0.025 mW


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

al

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

A


cherise1989

  • Hero Member
  • *****
  • Posts: 555
Reply #2 on: Jul 29, 2018
TY


al

  • Sr. Member
  • ****
  • Posts: 344
Reply #3 on: Jul 29, 2018
You're welcome


« previous next »
 

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Did you know?

The FDA recognizes 118 routes of administration.

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Blood glucose measurement. A postprandial test may be self-administered. (a) A lance pierces the ski Blood glucose measurement. A postprandial test may be self-administered. (a) A lance pierces the ski
Comparison of reactions at equilibrium and steady state Comparison of reactions at equilibrium and steady state
Sample root cause analysis: Duplicate dose of a narcotic analgesic. Sample root cause analysis: Duplicate dose of a narcotic analgesic.
Sample budget spreadsheet form for first year of business. Sample budget spreadsheet form for first year of business.
Video: Osmosis - Isotonic, Hypotonic, and Hypertonic​ Solutions

For a complete list of videos, visit our video library