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3 years ago

13

An electric fan rotates at 800rev/min.consider a point on the blade a distance of 0.16m from the axis, calculate the velocity of

this point and it's centripetal acceleration

1 answer:

Anuta_ua [19.1K]3 years ago

6 0

Answer:

A rotating fan completes 1200 revolutions every minute. Consider the tip of a blade, at a radius of 0.15 m.

Explanation:

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Units called BEATS measure the loudness of sounds.<br> true or false

gogolik [260]

Answer:

False.

Explanation:

Decibels (dB) measure sound levels

7 0

3 years ago

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Which of the following helps to explain how hydraulic lifts work?

Gnesinka [82]

Answer : C. Pascal's principle.

Explaination : Pascal's principle (well-known as Pascal's law) states that if a closed container contains a fluid at rest, then a small change in pressure at one side of the fluid is transmitted to each and every part of the fluid and also to the walls of the container without any loss. In a hydraulic lift, we need the same mechanism to work and so we take the help of Pascal's principle.

Hence, the correct option is C. Pascal's principle.

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4 years ago

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An eagle flies from its perch in a tree to the ground to capture and eat its prey. describe its energy transfromation

ddd [48]

10% energy is transferred from the prey to eagle and 90% energy is lost in the enviorment .

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3 years ago

What is the length of the shadow cast on the vertical screen by your 10.0 cm hand if it is held at an angle of θ=30.0∘ above hor

Alchen [17]

Answer:

The length is $D = 5 \ cm$

Explanation:

From the question we are told that

The length of the hand is $l = 10.0 \ cm$

The angle at the hand is held is $\theta = 30 ^o$

Generally resolving the length the length of the hand to it vertical component we obtain that the length of the shadow on the vertical wall is mathematically evaluated as

$D = l * sin(\theta )$

substituting values

$D = 10 * sin (30)$

$D = 5 \ cm$

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4 years ago

A man pushes a lawn mower with a force of 200 N across 50 meters of his lawn. How much work did the man perform?

Aleks [24]

Work = force x distance. So the answer would be 200x50=10000 joules

8 0

3 years ago