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

Author Question: An object having a fixed emissivity of 0.725 radiates heat at a rate of 10 W when it is at an ... (Read 151 times)

RRMR

  • Hero Member
  • *****
  • Posts: 557
on: Jul 29, 2018
An object having a fixed emissivity of 0.725 radiates heat at a rate of 10 W when it is at an absolute temperature T. If its temperature is doubled to 2T, at what rate will it now radiate?
 
  A) 20 W
  B) 40 W
  C) 80 W
  D) 160 W
  E) 320 W

Question 2

A tennis ball bounces on the floor three times, and each time it loses 23.0 of its energy due to heating. How high does it bounce after the third time, if we released it from the floor?
 
  A) 180 cm
  B) 18 cm
  C) 180 mm
  D) 240 cm


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Moriaki

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 29, 2018
Answer to Question 1

D

Answer to Question 2

A


RRMR

  • Member
  • Posts: 557
Reply 2 on: Jul 29, 2018
Gracias!

ktidd

  • Member
  • Posts: 319
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Did you know?

Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

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.

Effects of growth rate on development. Effects of growth rate on development.
Countercurrent heat exchange. Countercurrent heat exchange.
C, A nurse can also administer the medication by setting the dose and rate with an electronic infusi C, A nurse can also administer the medication by setting the dose and rate with an electronic infusi
This exhaust manifold has a heat shield to help retain the heat and help reduce exhaust emissions. This exhaust manifold has a heat shield to help retain the heat and help reduce exhaust emissions.
The heat range of a spark plug is determined by the distance the heat has to flow from the tip to ... The heat range of a spark plug is determined by the distance the heat has to flow from the tip to ...
A very light ideal spring stretches by when it is used to hang a 135-N object. What is the ... A very light ideal spring stretches by when it is used to hang a 135-N object. What is the ...
Video: How does an animal choose what food to eat?

For a complete list of videos, visit our video library