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guajiro [1.7K]
3 years ago
15

A machine has an efficiency of 70%. How much work dose the machine do when 20,000 J of work is done on it ?

Physics
1 answer:
Murrr4er [49]3 years ago
3 0

Answer: The machine does 14.000 J

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The terms intrusive and extrusive are used to describe which one of the three rock groups
tino4ka555 [31]

Answer:

IGNEOUS ROCKS

Explanation: Igneous rocks are those rocks that solidify from magma.

Igneous rock is divided into two ,they are:

1. Intrusive

Igneous rocks crystallized belowearth"s crust. Its cooling material is called lava.

2 Extrusive igneous rock is also known as known as volcanic rocks

8 0
3 years ago
An aluminum wire is 5.87 m long and has a diameter of 6.07 mm.
antoniya [11.8K]

Answer: 5.72 x 10-3Ω

Explanation:

Hi, to answer this question, first we have to calculate the cross sectional area of the cable:

Diameter (D)=6.07 mm

Since: 1000mm = 1m

6.07mm/ 1000mm/m = 0.00607 meters

Area of a circle : π (d/2)^2

A = π (0.00607/2)^2= 0.000028937 m2

Resistance formula:

Resistance (R) = P(resistivity) L (length)÷A (cross sectional area )

Replacing with the values given:

R = (2.82x10-8 x 5.87) / 0.000028937

R = 5.72 x 10-3Ω

Feel free to ask for more if needed or if you did not understand something.

7 0
3 years ago
So u see what had happened was i need help again..
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What kind of fluctuations in weather patterns do you expect to see in your area? Will the fluctuations or changes vary by month,
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Which statement accurately describes the illustration?
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The answer is B. I hope this helps! :)
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3 years ago
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