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

Author Question: The apparent brightness of a star is 1.0 10-12 W/m2 and the peak wavelength is 600 nm. Estimate its ... (Read 65 times)

torybrooks

  • Hero Member
  • *****
  • Posts: 500
on: Jul 29, 2018
The apparent brightness of a star is 1.0  10-12 W/m2 and the peak wavelength is 600 nm. Estimate its distance from us.
 
  A)
 
  0.090 pc
  B)
 
  0.90 pc
  C)
 
  9.0 pc
  D)
 
  90 pc
  E)
 
  900 pc

Question 2

Assume a proton in a 1-dim box of width 3.0 fm is in its 1 st excited state. (a) What is its kinetic energy (in eV)? (b) How close (fm) to the wall of the box is the probability density a maximum?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Jordin Calloway

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 29, 2018
Answer to Question 1

D

Answer to Question 2

(a) 91. MeV
(b) 0.75 fm


torybrooks

  • Member
  • Posts: 500
Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it

CAPTAINAMERICA

  • Member
  • Posts: 325
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.

Single-dose drug administration: pharmacokinetic values for this drug are as follows: onset of actio Single-dose drug administration: pharmacokinetic values for this drug are as follows: onset of actio
Crying Frequency in the Early Months In their first months of life, infants often cry for no appare Crying Frequency in the Early Months In their first months of life, infants often cry for no appare
Short-wavelength flux is reflected by Earth Short-wavelength flux is reflected by Earth
Black Hole and Companion Star Black Hole and Companion Star
According to the Balmer-Rydberg equation, electromagnetic radiation with wavelength λ = 486.1 ... According to the Balmer-Rydberg equation, electromagnetic radiation with wavelength λ = 486.1 ...
Mottled Sea Star (Evasterias troschelii) eating a clam, Alaska. Mottled Sea Star (Evasterias troschelii) eating a clam, Alaska.
Video: Segmentation and migrating motility complexes & Gastroileal reflex

For a complete list of videos, visit our video library