science

posted by Matt

check answers

1. A box of cleaning supplies weighs 15n.if the box is lifted a distance of 0.60m,how much work is done?

A. 0.040 j
B.9 j
C.14 j (I PICK THIS)
D.25 j

2.to chop wood you apply 50.0n of force to an ax. The ax applies 600.0n of force to the wood. What is the mechanical advantage of the ax?

A. 650.0 (I PICK THIS)
B. 8.3
C. 12.0
D. 0.0833

3.you do 185 j of work pulling a cart up a ramp. if the ramp does 153 j of work, what is the efficiency of the ramp?

A. 82.7 percent
B. 121.0 percent(I PICK THIS)
C. 32.0 percent
D. 338.0 percent

4.remy noticed that after oiling his skateboard wheels, it was easier to reach the speeds he needed to perform his tricks. How did the oil help??

A. the oil reduced friction between the moving parts of the skateboard.

B. the oil increased friction between the moving parts of the skateboard(I PICK THIS

C. the oil reduced friction between the skateboard wheels and the ground.

D. The oil increased friction between the skateboard wheels and the ground

  1. Damon

    1. A box of cleaning supplies weighs 15n.if the box is lifted a distance of 0.60m,how much work is done?
    ===================
    Force * distance
    15 * .6 = 9 Joules
    ==========================


    A. 0.040 j
    B.9 j MY CHOICE
    C.14 j (I PICK THIS)
    D.25 j

    2.to chop wood you apply 50.0n of force to an ax. The ax applies 600.0n of force to the wood. What is the mechanical advantage of the ax?
    =====================
    600/50 = 60/5 = 12
    ===================

    A. 650.0 (I PICK THIS)
    B. 8.3
    C. 12.0 <---------------- MY CHOICE
    D. 0.0833

    3.you do 185 j of work pulling a cart up a ramp. if the ramp does 153 j of work, what is the efficiency of the ramp?
    -----------------------------
    I think you have a typo in the question
    If the useful work done is 153 and you needed 165 then
    100 * 153/185 = 82.7%
    ===================

    A. 82.7 percent <------ MY CHOICE
    B. 121.0 percent(I PICK THIS)
    C. 32.0 percent
    D. 338.0 percent

    4.remy noticed that after oiling his skateboard wheels, it was easier to reach the speeds he needed to perform his tricks. How did the oil help??
    *************************************
    A. the oil reduced friction between the moving parts of the skateboard.
    **************************************
    Oil REDUCES friction!
    ****************************

    B. the oil increased friction between the moving parts of the skateboard(I PICK THIS *********NO!!!!!

    C. the oil reduced friction between the skateboard wheels and the ground.

    D. The oil increased friction between the skateboard wheels and the ground

  2. cece

    Your doomed

  3. Sarah

    I don't know either

  4. Mary

    I may have an idea I think it would be A.

  5. ryan

    1.o.040j 2.650.0 3.338.0

  6. Mo

    1. B
    2. C
    3. A
    4. A

  7. Kenzie

    Thanks mo!

  8. I dunno

    What about the last one? Matt forgot to put up question #5

  9. DeezNuts

    The last one is d

  10. Salted Caramel

    1. B
    2. C
    3. A
    4. A
    5. D

    100% guaranteed
    I just took it

  11. Anonymous

    Thanks salted Caramel!

  12. Reign

    Thank You
    Salted Carmel!!! I got 100%

  13. smart one : )

    salted carmel and mo are right i got 100% : )

  14. ME

    ITS JUST A CAMEL

  15. Camel Queen

    Thx Salted Carmel!

  16. SAV

    Salted Caramel is 100% correct. I have just taken the quiz and gotten a 5/5 100%

  17. horgie

    b
    c
    a
    a
    d

    5/5 100%

  18. Kim

    Thanks guys.

  19. SlackaCracka9000

    100% thx Caramel

  20. Anonymous

    This sit mad me get an f

  21. Alanah

    thanks

  22. CONNECTIONS ACCEDEMY STUDENT

    yup,correct
    bcaad

  23. bee

    thnx salted caramel i love you want to get married?

  24. candy

    i got 4 out of 5 right

  25. Papa Roach~Last Resort Fan

    SALTED CARAMEL IS CORRECT! Thanks salted caramel! 100%

    Answers:
    1.B
    2.C
    3.A
    4.A
    5.D
    !!!!!

  26. Anonymous

    Salted Caramel is correct for Unit 3, Lesson 1

  27. secret

    salted caramel rocks thanks dude!!!!!!!!!!!!:)

  28. Science

    This is for CONNECTIONS ACADEMY ONLY
    I do not want any other students from a different getting it wrong

    Lesson 1: Work and Machines
    Science 6 B Unit 3: Energy

    1. B
    2. C
    3. A
    4. A
    5. D

  29. Clorox Bleach

    1. B
    2. C
    3. A
    4. A
    5. D
    100% THANKS SALTED CARMEL.

  30. BOB

    SALTED CARAMEL IS CORRECT

  31. Connexusboi01

    SALTED CARAMEL IS CORRECT! Thanks salted caramel! 100%

    Answers:
    1.B
    2.C
    3.A
    4.A
    5.D

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