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

Author Question: A girl and her bicycle have a total mass of 40 kg. At the top of the hill her speed is 5.0 m/s. The ... (Read 80 times)

EY67

  • Hero Member
  • *****
  • Posts: 531
on: Jul 28, 2018
A girl and her bicycle have a total mass of 40 kg. At the top of the hill her speed is 5.0 m/s. The hill is 10 m high and 100 m long. If the force of friction as she rides down the hill is 24 N, what is her speed at the bottom?
 a. 5.0 m/s
  c. 11 m/s
  b. 10 m/s
  d. She stops before she reaches the bottom.

Question 2

A cylinder containing an ideal gas has a volume of 3.0 m3 and a pressure of 1.0  105 Pa at a temperature of 300 K. The cylinder is placed against a metal block that is maintained at 900 K and the gas expands as the pressure remains constant until the temperature of the gas reaches 900 K. The change in internal energy of the gas is 9.0  105 J. Find the change in entropy of the block associated with the heat transfer to the gas.
 a. 0
  c. -1700 J/K
  b. +670 J/K
  d. -1100 J/K


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

stallen

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

C


EY67

  • Hero Member
  • *****
  • Posts: 531
Reply #2 on: Jul 28, 2018
TY


stallen

  • Sr. Member
  • ****
  • Posts: 336
Reply #3 on: Jul 28, 2018
You're welcome


« previous next »
 

Did you know?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Did you know?

Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

Did you know?

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

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

Did you know?

Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
This 11-month old girl demonstrates one of the abilites of a child of this age group - creating a to This 11-month old girl demonstrates one of the abilites of a child of this age group - creating a to
Bicycle Escalator Bicycle Escalator
Mass Loss by a Supermassive Star Mass Loss by a Supermassive Star
How to solve a distance, time, speed problem using linear algebra How to solve a distance, time, speed problem using linear algebra
Mass Wasting Triggers Mass Wasting Triggers
Tragic events of mass shootings. Tragic events of mass shootings.
Video: Proteins

For a complete list of videos, visit our video library