« previous next »

Author Question: 150 kcal of heat raises the temperature of 2.0 kg of material by 400 F. What is the material's ... (Read 87 times)

V@ndy87

  • Hero Member
  • *****
  • Posts: 571
on: Jul 29, 2018
150 kcal of heat raises the temperature of 2.0 kg of material by 400 F. What is the material's specific heat capacity?
 
  A)
 
  1.35 kcal/kgC
  B)
 
  1.31 kcal/kgC
  C)
 
  0.75 kcal/kgC
  D)
 
  0.34 kcal/kgC
  E)
 
  0.19 kcal/kgC

Question 2

A centrifuge takes 100 s to spin up from rest to its final angular speed with constant angular acceleration
 
  . A point located 8.00 cm from the axis of rotation of the centrifuge moves with a speed of 150 m/s when the centrifuge is at full speed.
  (a) What is the average angular acceleration of the centrifuge as it spins up?
  (b) How many revolutions does the centrifuge make as it goes from rest to its final angular speed?


dellikani2015

  • Sr. Member
  • ****
  • Posts: 332
Reply #1 on: Jul 29, 2018
Answer to Question 1

D

Answer to Question 2

(a) 18.8 rad/s2
(b) 1.49  104 revolutions


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« 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?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Did you know?

On average, the stomach produces 2 L of hydrochloric acid per day.

An individual's performance can be limited by environmental conditions, such as temperature. Ac An individual's performance can be limited by environmental conditions, such as temperature. Ac
Countercurrent heat exchange in dolphin flippers promotes conservation of body heat. Countercurrent heat exchange in dolphin flippers promotes conservation of body heat.
Average Global Temperature Rise over the Past Century Average Global Temperature Rise over the Past Century
Predicted Temperature Trends Through the 21st Century Predicted Temperature Trends Through the 21st Century
Earth’s Heat Budget Earth’s Heat Budget
5-4 The relationship between vapor pressure and temperature—in this case for water. As the ... 5-4 The relationship between vapor pressure and temperature—in this case for water. As the ...
Video: Decubitus Ulcer

For a complete list of videos, visit our video library