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 30 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
Gracias!

jackie

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Rock Cycle Rock Cycle
Chemical equilibrium and the law of mass action. Chemical equilibrium and the law of mass action.
When the exhaust is lean, the PCM applies a positive current into the pump cell. When the exhaust is lean, the PCM applies a positive current into the pump cell.
Agricultural Land as a Fraction of Total Wealth in the United Kingdom Agricultural Land as a Fraction of Total Wealth in the United Kingdom
Gravitational Force Due to a Distribution of Mass problem 2 Gravitational Force Due to a Distribution of Mass problem 2
Migration as a force in evolution Migration as a force in evolution
Video: Neuron Structure Animation

For a complete list of videos, visit our video library