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

Author Question: Preston pushes a wheelbarrow weighing 500 N to the top of a 50.0-m ramp, inclined at 20.0 with the ... (Read 56 times)

Brittanyd9008

  • Hero Member
  • *****
  • Posts: 500
on: Jul 28, 2018
Preston pushes a wheelbarrow weighing 500 N to the top of a 50.0-m ramp, inclined at 20.0 with the horizontal and leaves it. Tamara accidentally bumps the wheelbarrow. It slides back down the ramp, during which a 60.0-N frictional force acts on it over the 50.0 m. What is the wheelbarrow's kinetic energy at the bottom at of the ramp? (g = 9.8 m/s2)
 a. 5550 J
  c. 8150 J
  b. 6550 J
  d. 13,100 J

Question 2

A 2.00-kg block of ice is at STP (0C, 1 atm) while it melts completely to water. What is its change in entropy? (For ice, Lf = 3.34  105 J/kg)
 a. zero
  c. 1220 J/K
  b. 584 J/K
  d. 2450 J/K


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

vickybb89

  • Sr. Member
  • ****
  • Posts: 347
Reply #1 on: Jul 28, 2018
Answer to Question 1

A

Answer to Question 2

D


Brittanyd9008

  • Member
  • Posts: 500
Reply 2 on: Jul 28, 2018
Great answer, keep it coming :)

daiying98

  • Member
  • Posts: 354
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

Did you know?

Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Directional selection pushes a phenotype one way or another. Directional selection pushes a phenotype one way or another.
Sample Diet for a College-Aged Female Weighing 132 Pounds, Assuming Light to Moderate Daily ... Sample Diet for a College-Aged Female Weighing 132 Pounds, Assuming Light to Moderate Daily ...
A 2.8-kg tool can move on a perfectly smooth ramp that slants at 42° above the horizontal. ... A 2.8-kg tool can move on a perfectly smooth ramp that slants at 42° above the horizontal. ...
A bulldozer attempts to drag a log weighing 500 N along the rough horizontal ground. The cable ... A bulldozer attempts to drag a log weighing 500 N along the rough horizontal ground. The cable ...
A forklift pushes a 100-kg crate, starting from rest, exerting a horizontal force of magnitude ... A forklift pushes a 100-kg crate, starting from rest, exerting a horizontal force of magnitude ...
graphic(04-40.jpg) Mary pushes horizontally on a large, heavy table which is s graphic(04-40.jpg) Mary pushes horizontally on a large, heavy table which is s
Video: Electromagnetic Spectrum, Chlorophyll and Pigment & Light

For a complete list of videos, visit our video library