« previous next »

Author Question: The Greek astronomer who assigned the stars to six magnitudes was named ______________. Fill in the ... (Read 85 times)

sammy

  • Hero Member
  • *****
  • Posts: 818
on: Jul 28, 2018
The Greek astronomer who assigned the stars to six magnitudes was named ______________.
 Fill in the blank(s) with correct word

Question 2

When the energy state of an atom changes by E, the frequency of the photon emitted or absorbed is calculated by dividing E by ______________.
 Fill in the blank(s) with correct word


jxjsniuniu

  • Sr. Member
  • ****
  • Posts: 343
Reply #1 on: Jul 28, 2018
Answer to Question 1

Hipparchus

Answer to Question 2

h, or Planck's constant


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

sammy

  • Hero Member
  • *****
  • Posts: 818
Reply #2 on: Jul 28, 2018
Thanks


jxjsniuniu

  • Sr. Member
  • ****
  • Posts: 343
Reply #3 on: Jul 28, 2018
Welcome :)


« previous next »
 

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Much of the dark space between stars, as seen in the sky of the image above, is due to the human eye Much of the dark space between stars, as seen in the sky of the image above, is due to the human eye
An example of a Hertzsprung–Russell diagram for a set of stars that includes the Sun An example of a Hertzsprung–Russell diagram for a set of stars that includes the Sun
Pulsars are highly magnetized, rotating neutron stars that emit a beam of electromagnetic radiation. Pulsars are highly magnetized, rotating neutron stars that emit a beam of electromagnetic radiation.
Stars and the Interstellar Medium Stars and the Interstellar Medium
Plotting the Ages of Stars Plotting the Ages of Stars
SBTRKT - Look at Stars Ft. Sampha SBTRKT - Look at Stars Ft. Sampha
Video: Bipolar Disorder

For a complete list of videos, visit our video library