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

Author Question: A person applies a constant force of 20 N to a rock of mass 1000 kg, for a total of 20 seconds. What ... (Read 53 times)

pane00

  • Hero Member
  • *****
  • Posts: 579
on: Jul 29, 2018
A person applies a constant force of 20 N to a rock of mass 1000 kg, for a total of 20 seconds. What is the work done by this person if the rock does not move at all by this applied force?
 
  A) 1000 J
  B) 2000 J
  C) 20,000 J
  D) 0 J
  E) 400 J

Question 2

The kilogram is currently defined as
 
  A) the mass of a platinum-iridium cylinder kept in Svres, France.
  B) the weight of a platinum-iridium cylinder as measured on the Earth's moon.
  C) the mass of 5.9786332  1026 protons.
  D) the mass of one liter of pure water, free of air, at standard temperature and pressure.
  E) the mass of a cube of pure water, free of air, 10 cm on each side, at standard temperature and pressure.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

bhavsar

  • Sr. Member
  • ****
  • Posts: 351
Reply #1 on: Jul 29, 2018
Answer to Question 1

D

Answer to Question 2

A


pane00

  • Member
  • Posts: 579
Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

marict

  • Member
  • Posts: 304
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

Did you know?

Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Did you know?

Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Pacific hagfish trying to hide under a rock Pacific hagfish trying to hide under a rock
Edward Bellamy, author of the utopian novel Looking Backward (1888) Bellamy’s socialism worried many Edward Bellamy, author of the utopian novel Looking Backward (1888) Bellamy’s socialism worried many
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 ...
Rock the leg to create movement at the hip joint. Apply passive movements to mobilize knee and hip ... Rock the leg to create movement at the hip joint. Apply passive movements to mobilize knee and hip ...
1) (a) What is Coulomb?s Law? (b) Find the net electrostatic force on the charge labeled ?P? in ... 1) (a) What is Coulomb?s Law? (b) Find the net electrostatic force on the charge labeled ?P? in ...
Floating rock illusion Floating rock illusion
Video: Hypoglycemia Animation

For a complete list of videos, visit our video library