« previous next »

Author Question: A child does 350 J of work while pulling a box from the ground up to his tree house at a steady ... (Read 23 times)

eruditmonkey@yahoo.com

  • Hero Member
  • *****
  • Posts: 546
on: Jul 29, 2018
A child does 350 J of work while pulling a box from the ground up to his tree house at a steady speed with a light rope. The tree house is above the ground. What is the mass of the box?
 
  A) 8.9 kg
  B) 5.3 kg
  C) 6.7 kg
  D) 8.0 kg

Question 2

Which of the following statements about spherical mirrors is correct? (There could be more than one correct choice.)
 
  A) A concave mirror always produces a real image.
  B) A convex mirror always produces a virtual image.
  C) A concave mirror always produces a virtual image.
  D) A convex mirror always produces a real image.
  E) A convex mirror always produces an upright image.


Brenm

  • Sr. Member
  • ****
  • Posts: 359
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

B, E


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

eruditmonkey@yahoo.com

  • Hero Member
  • *****
  • Posts: 546
Reply #2 on: Jul 29, 2018
Thank you!


Brenm

  • Sr. Member
  • ****
  • Posts: 359
Reply #3 on: Jul 29, 2018
Always glad to help...


« previous next »
 

Did you know?

Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

Did you know?

Illicit drug use costs the United States approximately $181 billion every year.

Did you know?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Lion at Melbourne Zoo enjoying an elevated grassy area with some tree shelter Lion at Melbourne Zoo enjoying an elevated grassy area with some tree shelter
This girl ran four spinning machines in a cotton mill in Whitnel, North Carolina. Only 4 feet, 3 inc This girl ran four spinning machines in a cotton mill in Whitnel, North Carolina. Only 4 feet, 3 inc
Barrel-vaulted gallery, ground floor of the Colosseum, Rome. Barrel-vaulted gallery, ground floor of the Colosseum, Rome.
Vacuum Tests: Steady Fluctuating Vacuum Vacuum Tests: Steady Fluctuating Vacuum
A 60-kg skier starts from rest from the top of a 50-m high slope. If the work done by friction ... A 60-kg skier starts from rest from the top of a 50-m high slope. If the work done by friction ...
A karyotype shows this child has three copies of chromosome 21. A karyotype shows this child has three copies of chromosome 21.
Video: Exocytosis - secretion

For a complete list of videos, visit our video library