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 57 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
Thanks for the timely response, appreciate it

dantucker

  • Member
  • Posts: 346
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

Did you know?

Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.

Did you know?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Wheel-Running Activity of a Rat Wheel-Running Activity of a Rat
Conventional color wheel Conventional color wheel
Thangka depicting Bhavacakra (Wheel of Life), Bhutan. Thangka depicting Bhavacakra (Wheel of Life), Bhutan.
The power and control wheel illustrates the strategies that one partner may use to intimidate, ... The power and control wheel illustrates the strategies that one partner may use to intimidate, ...
A bus starts from restat a station and accelerates at a rate of 2 m/s^2 for 15 seconds. It then runs A bus starts from restat a station and accelerates at a rate of 2 m/s^2 for 15 seconds. It then runs
Rotating a matrix along the x-axis Rotating a matrix along the x-axis
Video: Medullary osmotic gradient: countercurrent multiplier, urea recycling & vasa recta countercurrent exchange

For a complete list of videos, visit our video library