Author Question: A pencil that is 15.7 cm long is released from a vertical position with the eraser end resting on a ... (Read 42 times)

jparksx

  • Hero Member
  • *****
  • Posts: 570
A pencil that is 15.7 cm long is released from a vertical position with the eraser end resting on a table. The eraser does not slip as it tips over. Treat the pencil like a uniform rod.
 
  What is the angular speed of the pencil just before it hits the table? A) 13.7 rad/s
  B) 7.23 rad/s
  C) 3.70 rad/s
  D) 24.5 rad/s
  E) 16.8 rad/s

Question 2

One of the first atomic bombs released energy equivalent to that of 20,000 tons of TNT explosive.
 
  How much mass was converted to energy by this explosion, given that 1000 tons of TNT produce 4.3  1012 J of energy. Incidentally, modern H-bombs have energy yields 1000 times as much (c = 3.0  108 m/s)



katheyjon

  • Sr. Member
  • ****
  • Posts: 331
Answer to Question 1

A

Answer to Question 2

0.96 g



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

Did you know?

If all the neurons in the human body were lined up, they would stretch more than 600 miles.

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Did you know?

There are more nerve cells in one human brain than there are stars in the Milky Way.

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

For a complete list of videos, visit our video library