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Gemiola [76]
3 years ago
15

A typical flying insect applies an average force equal to twice its weight during each downward stroke while hovering. Take the

mass of the insect to be 7.0g , and assume the wings move an average downward distance of 1.5cm during each stroke. Assuming 117 downward strokes per second, estimate the average power output of the insect.
Physics
1 answer:
Veronika [31]3 years ago
5 0

Answer:

Average power = 0.240Watts

Explanation:

The insect requires double the force on its wings to counteract the gravitational force pulling it down.it generates upward force as below

Upward Force=2Gravitational force

force =2x(mass x gravitational pull)

F=(0.007x9,8)x 2

F=0.137 Nm

Power generated is =work/time

power =force *displacement/time

convert 1.5cm to SI units meters=0.015meters

displacement in one second is=0.015 x number of strokes

displacement =0.015*117

displacement =1.755 meters

power=(0.137*1.755)/1second

power=0.240 Watts

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Erosion, weathering, mechanical changes, chemical changes.

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Consider Newton's Law of Universal Gravitation: FG= G (m1 m2)/d2 .
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Answer:

C

Mass is directly proportional to the Force of Gravity. If Mass increases, then the Force of Gravity increases; however, Distance is indirectly (or inversely) proportional to the Force of Gravity. If Distance increases, then the Force of Gravity decreases.

Explanation:

The formula for the force of gravity between two objects is

F=G\frac{m_1 m_2}{d^2}

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We notice the  following:

- F is directly proportional to the masses, F\propto m_1, m_2. This means that if one of the masses increases, then the force between them, F, increases in a proportional way

- F is inversely proportional to the square of the distance, F\propto \frac{1}{d^2}. This means that if the distance between the two objects is increased, the force between them will decrease, and vice-versa.

So, the correct answer is

C

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A rotating paddle wheel is inserted in a closed pot of water. The stirring action of the paddle wheel heats the water. During th
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the final energy of the system is 35.5 kJ.

Explanation:

Given;

initial energy of the system, E₁ = 10 kJ

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heat gained by the system, Q = q₁ - q₂ = 30 kJ - 5kJ = 25 kJ

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Apply first law of thermodynamic,

ΔU = Q + W

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The final energy of the system is calculated as;

E₂ = E₁ + ΔU

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E₂ =  35.5 kJ.

Therefore, the final energy of the system is 35.5 kJ.

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The missing word here is <u>Asthenosphere.</u><u> </u>

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Learn why properties of the asthenosphere are important: brainly.com/question/11484043

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