4 years ago

What organelle creates food for plants?

Physics

2 answers:

Aleonysh [2.5K]4 years ago

8 0

The answer is chloroplasts.

zysi [14]4 years ago

3 0

Chloroplast use the energy from the sun to make rich food molecules

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The angular speed of the rotor in a centrifuge increases from 420 to 1420 rad/s in a time of 5.00 s. (a) Obtain the angle throug

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Answer:

a) θ = 2500 radians

b) α = 200 rad/s²

Explanation:

Using equations of motion,

θ = (w - w₀)t/2

θ = angle turned through = ?

w = final angular velocity = 1420 rad/s

w₀ = initial angular velocity = 420

t = time taken = 5s

θ = (1420 - 420) × 5/2 = 2500 rads

Again,

w = w₀ + αt

α = angular accelaration = ?

1420 = 420 + 5α

α = 1000/5 = 200 rad/s²

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Calculate the kinetic energy of a 4.00kg object traveling at 16.0 m/s

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A girl moves quickly to the center of a spinning merry-go-round, traveling along the radius of the merry-go-round. Which of the

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Answer:

The angular speed of the system increases.

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Explanation:

As we know that the girl is going towards the center of the circle so here the moment of inertia of the girl is given as

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here we know that

r = position of the girl from the center of the disc

now we know that the girl is moving towards the center so its distance will continuously decreasing

So the moment of inertia of the girl will decrease

Now we know that that with respect to the center of the disc there is no torque on the disc + girl system

So here we can use angular momentum conservation

So we have

$I\omega = constant$

since moment of inertia is decreasing for the system

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