Physics, 28.01.2022 05:30 edwrads4044
Find the efficiency of a machine that does 900 J of work if the input work is 1,200 J. You must show all your work to receive credit.
A wheelbarrow can be used to help lift a load and push the load across a distance. The fulcrum is located at the opposite end where the effort is applied and the load (whatever is in the wheelbarrow) is in the middle of the fulcrum and effort.
What kind of lever is the wheelbarrow.
A. Class 1 Lever - The fulcrum is located between the effort and the load.
B. Class 2 Lever - The closer the load is placed to the fulcrum, the less effort needed to lift the load.
C. Class 3 Lever - The effort lies between the load and the fulcrum.
How does a machine make work easier? A machine makes work easier by changing. Choose the three statements that apply.
the direction of a force
the amount of force applied
the time needed to do the work
the amount of work done
the distance over which a force is applied
Adam lifts a book from the floor, carries it across the room, and places it on a high shelf. When is Adam doing work on the book?
W= FD
Work = Force x Distance
A. He does work from the moment he touches the book until he lets it go.
B. He does work only while he carries the book across the room.
C. He does work as he picks up the book and as he lifts it to the shelf.
D. He does work on the book at no time during this process.
Two girls each carry a box up to the fourth floor of a building. The total mass of each girl and the box she is carrying is the same. Rachel makes the trip in 35 seconds while Madison takes 50 seconds.
Which of the following statements best describes this task?
A. Madison does more total work than Rachel.
B. Rachel has greater power output than Madison.
C. Rachel does more total work than Madison.
D, Madison has a greater power output than Rachel.
please don't steal my points if you can't answer it thx for trying
Answers: 1
Physics, 22.06.2019 18:00
The protons in a nucleus are approximately 2 ✕ 10^−15 m apart. consider the case where the protons are a distance d = 1.93 ✕ 10^−15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.
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Physics, 22.06.2019 18:30
Blood pressure the total amount of blood the heart pumps in one minute 2. cardiac output the number of times your heart beats in a minute 3. dilate the amount of blood that the heart can pump in a single beat 4. heart rate the force exerted on the walls of the blood vessels by the blood that moves through them 5. stroke volume to widen or get larger in size
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Physics, 23.06.2019 02:50
Acharged particle moves in a circular path in a uniform magnetic field.which of the following would increase the period of the particle's motion? check all that apply.increasing its chargeincreasing its massincreasing the field strengthincreasing its speed
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Find the efficiency of a machine that does 900 J of work if the input work is 1,200 J. You must show...
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