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goblinko [34]
2 years ago
11

This homework is meant to be in for today first lesson, please help!!!

Physics
1 answer:
Black_prince [1.1K]2 years ago
4 0

The agriculture land needed to grow the willow is 1500000 Hectares

<h3>What is Power?</h3>

Power can be defined as the rate at which work is done by an object. The S.I unit of power is Watt(W).

A coal burning power station burns 6 million tonnes of coal per kg. Coal has a average energy value of 29.25 MJ per year. Wood chip from willow trees has an energy value of 13 MJ per kg. A hectare of agricultural land can produce 9 tonnes of drt willow wood per year.

The coal consumption per year = 29.25 x 1000 x 6000000

                                                    =175500000000 MJ

If this power station burned dry willow wood instead of coal, agriculture land would be needed to grow the willow,

1 hectare of willow will produce 9 x 13x 1000 = 117000 MJ.

The agriculture land needed to grow the willow is

= 175500000000 MJ /  117000 MJ.

= 1500000 Hectares.

Thus, agriculture land needed is  1500000 Hectares.

Learn more about power.

brainly.com/question/15120631

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Answer:

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  W = 1,307 10⁶ J

Explanation:

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we integrate

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We evaluate between the limits, lower r = R_ Moon and r = ∞

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For the capsule

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I think it is easier to follow the exercise in SI system  

           W_capsule = 1000 pound (1 kg / 2.20 pounds)

           W_capsule = 454 N

           W = m_capsule g

           m_capsule = W / g

           m = 454 /9.8

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Let's calculate

          W = 6.67 10⁻¹¹ 46,327   7.36 10²² / 1.74 10⁶

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