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 54 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

rachel

  • Member
  • Posts: 323
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

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?

The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

Did you know?

Green tea is able to stop the scent of garlic or onion from causing bad breath.

Characteristics of a Neuron at Rest and During the Different Phases of an Action Potential Characteristics of a Neuron at Rest and During the Different Phases of an Action Potential
Allow tissues to rest after myofascial applications. Allow tissues to rest after myofascial applications.
Cradle the head briefly in both hands to end this section. Hold for a few seconds until you can feel ... Cradle the head briefly in both hands to end this section. Hold for a few seconds until you can feel ...
How to convert from degrees to degrees, minutes, seconds using your Fx-991ES Plus calculator How to convert from degrees to degrees, minutes, seconds using your Fx-991ES Plus calculator
Ferris Wheel Question Ferris Wheel Question
An electron is accelerated from rest through a potential difference of 3750 V. It enters a ... An electron is accelerated from rest through a potential difference of 3750 V. It enters a ...
Video: Causes of Acne

For a complete list of videos, visit our video library