« previous next »

Author Question: The background microwave radiation, discovered in 1965 by Penzias and Wilson, has its peak intensity ... (Read 65 times)

Alygatorr01285

  • Hero Member
  • *****
  • Posts: 564
on: Jul 29, 2018
The background microwave radiation, discovered in 1965 by Penzias and Wilson, has its peak intensity at a wavelength of 1.06 mm.
 
  What blackbody temperature does this wavelength imply for the universe? ( = 5.670  10-8 W/m2  K4, Wien displacement law constant is 2.90  10-3 m  K)
  A) 0.00C B) 0.0027 K C) -2.7C D) -270C E) 2.7C

Question 2

You are standing in a moving bus, facing forward, and you suddenly move forward as the bus comes to an immediate stop. What force caused you to move forward?
 
  A)
 
  force of gravity
  B)
 
  normal force due to your contact with the floor of the bus
  C)
 
  force due to static friction between you and the floor of the bus
  D)
 
  force due to kinetic friction between you and the floor of the bus
  E)
 
  no forces were responsible for your fall.


bhavsar

  • Sr. Member
  • ****
  • Posts: 351
Reply #1 on: Jul 29, 2018
Answer to Question 1

D

Answer to Question 2

E


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

Barbara McClintock, who discovered transposable elements. Barbara McClintock, who discovered transposable elements.
Manganese helps Deinococcus radiodurans to avoid radiation damage. Manganese helps Deinococcus radiodurans to avoid radiation damage.
Manganese helps Deinococcus radiodurans to avoid radiation damage. Manganese helps Deinococcus radiodurans to avoid radiation damage.
Hue, Intensity, and Saturation Hue, Intensity, and Saturation
Tornado Intensity – Enhanced Fujita Scale Tornado Intensity – Enhanced Fujita Scale
Video: ribosome

For a complete list of videos, visit our video library