This topic contains a solution. Click here to go to the answer

Author Question: Suppose that the speed of an electron traveling 2000 m/s is known to an accuracy of 1 part in 105 ... (Read 77 times)

Anajune7

  • Hero Member
  • *****
  • Posts: 574
Suppose that the speed of an electron traveling 2000 m/s is known to an accuracy of 1 part in 105 (i.e., within 0.001). What is the greatest possible accuracy within which we can determine the position of this electron?
 
  A)
 
  2.9 mm
  B)
 
  5.8 mm
  C)
 
  8.7 mm
  D)
 
  1.2 cm
  E)
 
  1.6 cm

Question 2

It can be shown that the approximate age of the universe is 1/H, where H is the Hubble constant. Taking H = 20 km/s/Mly, estimate the age of the universe, in years.
 
  A)
 
  1500 years
  B)
 
  15 thousand years
  C)
 
  15 million years
  D)
 
  15 billion years
  E)
 
  15 trillion years



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

angrybirds13579

  • Sr. Member
  • ****
  • Posts: 344
Answer to Question 1

B

Answer to Question 2

D



Anajune7

  • Hero Member
  • *****
  • Posts: 574
Both answers were spot on, thank you once again




 

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Did you know?

When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

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?

The longest a person has survived after a heart transplant is 24 years.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

For a complete list of videos, visit our video library