Author Question: A point on a wheel of radius 40 cm that is rotating at a constant 5.0 revolutions per second is ... (Read 68 times)

audragclark

  • Hero Member
  • *****
  • Posts: 579
A point on a wheel of radius 40 cm that is rotating at a constant 5.0 revolutions per second is located 0.20 m from the axis of rotation. What is the acceleration of that point due to the spin of the wheel?
 
  A) 0.050 m/s2
  B) 1.4 m/s2
  C) 48 m/s2
  D) 200 m/s2
  E) 0.00 m/s2

Question 2

The wavelength of the emitted photon if an electron in the hydrogen atom makes a transition from the n = 2 state to the ground state is closest to which of the following values?
 
  (c = 3.0  108 m/s, h = 6.626  10-34 J  s, 1 eV = 1.60  10-19 J)
  A) 122 nm
  B) 203 nm
  C) 243 nm
  D) 389 nm
  E) 411 nm


joanwhite

  • Sr. Member
  • ****
  • Posts: 308
Answer to Question 1

D

Answer to Question 2

A



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

Did you know?

Approximately 25% of all reported medication errors result from some kind of name confusion.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

Did you know?

There are more bacteria in your mouth than there are people in the world.

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.

For a complete list of videos, visit our video library