« 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 70 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?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Did you know?

Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

California ground squirrel (Spermophilus beecheyi) in the man-made rocky shoreline of the Berkeley M California ground squirrel (Spermophilus beecheyi) in the man-made rocky shoreline of the Berkeley M
tree-ring data tree-ring data
photosynthesis of a tree "التركيب الضوئي" photosynthesis of a tree "التركيب الضوئي"
A child with rickets A child with rickets
Math work Math work
Modern house door design Modern house door design
Video: Attention Deficit Disorder (ADD)

For a complete list of videos, visit our video library