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3 years ago

Does anyone know the answer

Physics

1 answer:

scoundrel [369]3 years ago

7 0

No put false I am right

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Pani-rosa [81]

The answer would be center of mass, B

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3 years ago

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I have 22 electrons; how many protons and neutrons do I have?

Vsevolod [243]

Answer:

11 electrons & 11 neutrons

Explanation:

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3 years ago

Two children are riding on the edge of a merry-go-round that has a mass of 100.kg and radius of 1.60m and is rotating at 20.0rpm

Gre4nikov [31]

Here since both children and merry go round is our system and there is no torque acting on this system

So we will use angular momentum conservation in this

$I_1\omega_1 = I_2\omega_2$

now here we have

$I_1 = \frac{MR^2}{2} + m_1R^2 + m_2R^2$

$I_1 = \frac{100(1.60)^2}{2} + (22 + 28)(1.60)^2$

$I_1 = 256$

Now when children come to the position of half radius

then we will have

$I_2 = \frac{MR^2}{2} + m_1(\frac{R}{2})^2 + m_2(\frac{R}{2})^2$

$I_2 = \frac{100(1.6)^2}{2} + (28 + 22)(0.8)^2$

$I_2 = 160$

now from above equation we have

$256 (20.0 rpm) = 160(\omega_2)$

$\omega_2 = 32 rpm$

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3 years ago

Power output of an engine is with work (w=60,000) during 60 s Calculate the power of this work?*

igomit [66]

Answer:

<em>The power output of the engine is 1,000 Watt</em>

Explanation:

<u>Mechanical Power </u>

Power is the amount of energy transferred or converted per unit of time. In the SI, the unit of power is the watt, equal to one joule per second.

The power can be calculated as:

$\displaystyle P=\frac {W}{t}$

Where W is the work and t is the time.

The engine does a work of W=60,000 J during t=60 s. Calculate the power:

$\displaystyle P=\frac {60,000}{60}$

P = 1,000 Watt

The power output of the engine is 1,000 Watt

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3 years ago

Why is the answer E?

ivann1987 [24]

Answer:

It takes 1 second to drop 26.4 meters, for acceleration due to gravity, the acceleration would double from the meters and would be 52.8 m/s^2.

Is there more information above question 4?

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4 years ago

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