« previous next »

Author Question: A 3.45-kg centrifuge takes 100 s to spin up from rest to its final angular speed with constant ... (Read 114 times)

rachel9

  • Sr. Member
  • ****
  • Posts: 495
on: Jul 29, 2018
A 3.45-kg 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 angular acceleration (in rad/s2 ) 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?

Question 2

A person of mass 50 kg has a de Broglie wavelength of 4.4  10-36 m while jogging. How fast is she running? (h = 6.626  10-34 J  s)
 
  A) 2.0 m/s
  B) 3.0 m/s
  C) 4.0 m/s
  D) 5.0 m/s


Jmfn03

  • Sr. Member
  • ****
  • Posts: 323
Reply #1 on: Jul 29, 2018
Answer to Question 1

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

Answer to Question 2

B


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?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Did you know?

During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Find the final amount if the initial amount is 400 units. Find the final amount if the initial amount is 400 units.
The Solar Constant The Solar Constant
How to evaluate a function containing the constant k How to evaluate a function containing the constant k
Cradle the head to finish. Rest the head on the table. Place your fingers on the sides of the head ... Cradle the head to finish. Rest the head on the table. Place your fingers on the sides of the head ...
A tsunami (tidal wave) traveling across deep water can have a speed of 750 km/h k m / h and a ... A tsunami (tidal wave) traveling across deep water can have a speed of 750 km/h k m / h and a ...
The charge for telephone calls T is partly constant and partly varies with the number N of ... The charge for telephone calls T is partly constant and partly varies with the number N of ...
Video: Introduction to Herpes

For a complete list of videos, visit our video library