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3 years ago

5

However, sometimes levers are designed to increase the input force needed to move an object. Which of the following is most like

ly an example of this type of lever?

1 answer:

Tems11 [23]3 years ago

6 0

What are the answer choices, if there are any?

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What is the farthest distance at which a typical "nearsighted" frog can see clearly in air?

Umnica [9.8K]

Answer: the correct option is D (17m).

Explanation: The farthest distance at which a typical "nearsighted" frog can see clearly in air is 17m.

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3 years ago

This reaction appears to be destroying the logs. when it is over only ash will remain, the law of conservation of mass tells us

Advocard [28]

The law of conservation tells us that no mass is lost. This is true because when wood burns or turns into ash, some of it is escaped as gases like carbon dioxide and water vapor into air . If we calculate the mass of these atmospheric gases that evolved when the wood turned into ash, we would find that the total mass of all these substances including the ash is equal to the log of wood.

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3 years ago

How long does it take a wheel that is rotating at 33.3 rpm to speed up to 78.0 rpm if it has an angular acceleration of 2.15 rad

Rzqust [24]

initial angular speed is given by 33.3 rpm

$w_0 = 2\pi \frac{33.3}{60}$

$w_0 = 3.49 rad/s$

final angular speed is given by 78 rpm

$w_f = 2\pi \frac{78}{60}$

$w_f = 8.17 rad/s$

now by using kinematics we will have

$w_f = w_0 + \alpha * t$

$8.17 = 3.49 + 2.15 * t$

$t = 2.17 seconds$

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3 years ago

Which of the following best describes the upper respiratory tract?

In-s [12.5K]

A). It takes air in from outside the body.

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2 years ago

You need to push a heavy box across a rough floor, and you want to minimize the average force applied to the box during the time

7nadin3 [17]

When pushing the body it is necessary to break the frictional force generated by the floor. Once this frictional force is overcome, the body will begin to move. Ideally, if a constant velocity is maintained or close to this value, the acceleration that will be exerted will tend to be zero and therefore, by Newton's second law the value of the Force will also tend to minimum values.

Remember that this law tells us that

$F= ma$

$F= m \frac{\Delta v}{t}$

Therefore the best strategy is A. keep pushing the box forward at a steady speed

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3 years ago