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

Author Question: Two objects are placed in a room with a temperature of 20C. Object A has a temperature of 70C, while ... (Read 126 times)

Themember4

  • Hero Member
  • *****
  • Posts: 538
on: Jul 29, 2018
Two objects are placed in a room with a temperature of 20C. Object A has a temperature of 70C, while object B has a temperature of 140C. They have the same emissivity, but different areas.
 
  What should the ratio of the area of object A to that of object B be if the net power emitted by both objects is the same? A) 2.0
  B) 3.4
  C) 5.2
  D) 17
  E) 21

Question 2

A 55-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.30. A 140-N force is applied to the box. What is the frictional force on the box?
 
  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

31809pancho

  • Sr. Member
  • ****
  • Posts: 317
Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

140 N


Themember4

  • Member
  • Posts: 538
Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it

nanny

  • Member
  • Posts: 313
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

Did you know?

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

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

The end of a box-end wrench is angled 15 degrees to allow clearance for nearby objects or other ... The end of a box-end wrench is angled 15 degrees to allow clearance for nearby objects or other ...
Influences on Temperature: Altitude and Elevation Influences on Temperature: Altitude and Elevation
Jan-Dec Global Mean Temperature Over Land and Ocean Jan-Dec Global Mean Temperature Over Land and Ocean
Temperature Sensations for Thermo-, Neutro-, and Cryo-Hydrotherapy Temperature Sensations for Thermo-, Neutro-, and Cryo-Hydrotherapy
Pacific Decadal Oscillation: Temperature in degree Celsius Pacific Decadal Oscillation: Temperature in degree Celsius
If you walk 5.0 m horizontally forward at a constant velocity carrying a 10 N object, the ... If you walk 5.0 m horizontally forward at a constant velocity carrying a 10 N object, the ...
Video: Hemoglobin's affinity with oxygen - carbon dioxide, temperature and bisphosphoglycerate (BPG)

For a complete list of videos, visit our video library