This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A wheel slows down uniformly and comes to rest in 15 seconds. It is rotating initially at 2.0 ... (Read 55 times)

Lobcity

  • Hero Member
  • *****
  • Posts: 524
on: Jul 27, 2018
A wheel slows down uniformly and comes to rest in 15 seconds. It is rotating initially at 2.0 revolutions per second and has a diameter of 50.cm.
 
  (a) What was the centripetal acceleration at the instant when it was rotating initially?
  (b) What was the tangential acceleration?

Question 2

Mathilda collects photoelectric data in her physics laboratory. She measures a stopping potential of 5.82 volts for radiation of wavelength 100. nm, and 17.99 volts stops 50.0 nm.
 
  (a) What is the work function for the material in eV?
  (b) From her data one determines Planck's constant to be what?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

emily12345

  • Sr. Member
  • ****
  • Posts: 321
Reply #1 on: Jul 27, 2018
Answer to Question 1

(a) 39. m/s2
(b) -0.21 m/s2

Answer to Question 2

(a) 6.70 eV
(b) 6.50  10-34 J-s


Lobcity

  • Member
  • Posts: 524
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

cam1229

  • Member
  • Posts: 329
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

The exhaust drives the turbine wheel on the left, which is connected to the impeller wheel on the ... The exhaust drives the turbine wheel on the left, which is connected to the impeller wheel on the ...
Rub for at least 15 seconds. Particles and pathogens become suspended in the soapy lather and are ... Rub for at least 15 seconds. Particles and pathogens become suspended in the soapy lather and are ...
Finish gently holding the head. Place palms of hands lightly over the ears for a few seconds. Slowly ... Finish gently holding the head. Place palms of hands lightly over the ears for a few seconds. Slowly ...
Neck stretch. Rest the receiver’s head on the palm of your right hand, taking a firm hold on the ... Neck stretch. Rest the receiver’s head on the palm of your right hand, taking a firm hold on the ...
Convert 0.4 radians to Degrees, Minutes, Seconds Convert 0.4 radians to Degrees, Minutes, Seconds
Rotating a matrix along the x-axis multiplication Rotating a matrix along the x-axis multiplication
Video: Phases of the Female Reproductive Cycle - Hormonal regulation

For a complete list of videos, visit our video library