« previous next »

Author Question: Sunspot numbers were lowest in this century: A) seventeenth century. B) eighteenth century. C) ... (Read 104 times)

olgavictoria

  • Hero Member
  • *****
  • Posts: 528
on: Jul 14, 2018
Sunspot numbers were lowest in this century:
 
  A) seventeenth century.
  B) eighteenth century.
  C) nineteenth century.
  D) twentieth century.

Question 2

Explain why ultraviolet (UV) radiation causes sunburn and infrared (IR) radiation does not.
 
  What will be an ideal response?


katara

  • Sr. Member
  • ****
  • Posts: 305
Reply #1 on: Jul 14, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: The amount of energy delivered is determined by wavelength; shorter wavelengths are more energetic. Ultraviolet radiation is associated with shorter wavelengths and can deliver more energy to exposed skin than can infrared radiation.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Did you know?

Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

Did you know?

In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

The Black Death spread over much of Europe in a three-year period in the middle of the fourteenth ce The Black Death spread over much of Europe in a three-year period in the middle of the fourteenth ce
Predicted Temperature Trends Through the 21st Century Predicted Temperature Trends Through the 21st Century
How to add and subtract complex numbers How to add and subtract complex numbers
Identification of the numbers in the Word Problem Identification of the numbers in the Word Problem
Numbers 2 and 5 only Numbers 2 and 5 only
How to calculate the gain and loss gene numbers with low bootstrap of phylogenetic tree? How to calculate the gain and loss gene numbers with low bootstrap of phylogenetic tree?
Video: baroreceptors

For a complete list of videos, visit our video library