Science (please check my answers)

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7. During the process of photosynthesis, plants convert carbon dioxide and water into glucose. Covalent bonds hold the glucose molecules together. The breaking of the covalent bonds during digestion releases energy. The type of energy released is (1 point)
• kinetic energy.
• electrical energy.
• potential energy.
8. Which would best reduce the amount of energy needed to pull a wagon up a ramp? (1 point)
• reducing the friction between the wagon wheels
• reducing the length of the wagon handle
• increasing the friction between the wagon wheels


9. To lift a load to the roof, you apply 21 N of force to a pulley. The pulley applies 21 N of force to the load. What is the mechanical advantage of the pulley? (1 point)
• 1
• 40
10. Carla applied a force of 35 N to a wheelbarrow full of bricks and moved it 2.5 m. Which of the following can be determined from this information? (1 point)
Hint: Multiply force by distance.
• The wheelbarrow supplied 87.5 J of work.
• The wheelbarrow has a mechanical advantage of 14.
• The wheelbarrow has 87.5 J of potential energy.



my answers:

7.kinetic energy.
8.reducing the friction between the wagon wheels
9.40
10. The wheelbarrow supplied 87.5 J of work.

  • Science (please check my answers) -

    7. potential energy
    8.reducing the friction between the wagon wheels
    9.21
    10.The wheelbarrow supplied 87.5 J of work.

  • Science (please check my answers) -

    nope i took the test already number 9 is actually supose to be 1

  • Science (please check my answers) -

    ya lorenze is right 9's 1

  • Science (please check my answers) -

    I am taking the test but number 9 has 4 answers its

    A.Nuclear Energy
    B.Thermal energy
    C.Electrical Energy
    D.Chemical energy
    I chose D but is that the answer?

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