Author Question: 150 kcal of heat raises the temperature of 2.0 kg of material by 400 F. What is the material's ... (Read 82 times)

V@ndy87

  • Hero Member
  • *****
  • Posts: 571
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
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
 

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

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?

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.

For a complete list of videos, visit our video library