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nydimaria [60]
3 years ago
6

ndicate whether the statement is true or false. Whenever we move, we alter the rate at which we move into the future. A. True B.

False
Physics
1 answer:
Ksju [112]3 years ago
4 0
Whenever we move, we alter the rate at which we move into the future. This statement is true. 
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Which type of change results in a new substance being produced?
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Answer:

Chemical

Explanation:

A chemical change is also known as chemical reaction. It is a change that results to the formation of a new substance.

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A cloud of interstellar gas is rotating. Because the gravitational force pulls the gas particles together, the cloud shrinks, an
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Answer:

Greater than

Explanation:

Here, angular momentum is conserved.

l_1\omega_1 =l_2\omega_2

When the cloud shrinks under the right conditions, a star may be formed.

Thus, Diameter of clouds are much higher than a star.

Moment of inertia of cloud is greater than the star's inertial.

so, angular velocity of the star would be greater than angular velocity of the rotating gas.

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3 years ago
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A 1.0-kg ball is attached to the end of a 2.5-m string to form a pendulum. This pendulum is released from rest with the string h
hram777 [196]

Answer:

v_{2}=3.5 m/s

Explanation:

Using the conservation of energy we have:

\frac{1}{2}mv^{2}=mgh

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v=\sqrt{2gh}

So the speed at the lowest point is v=7 m/s

Now, using the conservation of momentum we have:

m_{1}v_{1}=m_{2}v_{2}

v_{2}=\frac{1*7}{2}

Therefore the speed of the block after the collision is v_{2}=3.5 m/s

I hope it helps you!

       

8 0
3 years ago
A wheel of mass 60.0 kg is pushed with a net force of 26.4 N. Find acceleration.
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F= ma; a= F/m

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Which three statements about electromagnetic radiation are true?
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I think that numbers one, three, and four are true
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