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Tpy6a [65]
3 years ago
8

Consider lifting a box of mass m to a height h using two different methods: lifting the box directly or lifting the box using a

pulley (as in the previous part). What is Wd/Wp, the ratio of the work done lifting the box directly to the work done lifting the box with a pulley?
Physics
1 answer:
cricket20 [7]3 years ago
8 0

Answer:

Wd/wp =1

Explanation:

The work done in lifting the box directly, is the same as lifting the box using pulley.

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According to Newton’s first law of motion, when will an object at rest begin to move?
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Newton's first law of motion says something like "An object remains
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Constant uniform motion means no change in speed or direction.
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3 years ago
What is the resistance in a circuit that carries a 0.75 A current when powered by a 1.5 V battery?
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The formula to use is: I = (<span> ΔV / R )
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A rectangular loop of wire with width 0.4 cm and length 0.4 cm is oriented with the normal to the face of the loop making an ang
svetoff [14.1K]

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0.001067 Wb

Explanation:

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Width = 0.4cm = 0.04m

Length = 0.4cm = 0.04m

Magnetic flux, Φ(B) is given as:

Φ(B) = B * A * cosθ

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Φ(B) = 0.77 * 0.0016 * cos30

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6 0
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3.00 m3 of a fixed mass of a gas at 150 kPa. Calculate the pressure if the volume is reduced to 1.20 m3 at a constant temperatur
viktelen [127]

Answer:

P₂ = 375 kPa.

Explanation:

Given that,

Initial volume, V₁ = 3 m³

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At constant temperature,

P\propto \dfrac{1}{V}\\\\P_1V_1=P_2V_2\\\\P_2=\dfrac{P_1V_1}{V_2}\\\\P_2=\dfrac{150\ kPa\times 3\ m^3}{1.2\ m^3}\\\\P_2=375\ kPa

So, the new pressure is 375 kPa.

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