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 64 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
Great answer, keep it coming :)

strudel15

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
Apparent Magnitude Scale Apparent Magnitude Scale
Mass Loss by a Supermassive Star Mass Loss by a Supermassive Star
Short-wavelength flux is reflected by Earth Short-wavelength flux is reflected by Earth
Black Hole and Companion Star Black Hole and Companion Star
After elections were held, it was desired to estimate the proportion of voters who regretted ... After elections were held, it was desired to estimate the proportion of voters who regretted ...
Video: Transferring genes into plants Animation

For a complete list of videos, visit our video library