2 years ago

Hubble's law states that the farther away a galaxy is, the faster it moves away from us.

Physics

1 answer:

aleksley [76]2 years ago

4 0

Answer:

Yes it is true

As the Hubble's law states that the observation in physical cosmology that galaxies are moving away from the Earth at speeds proportional to their distance.

Explanation:

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A fan blade, initially at rest, rotates with a constant acceleration of 0.029 rad/s2. What is the time interval required for it

LenKa [72]

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The time interval is $t = 21.30 \ s$

Explanation:

From the question we are told that

The constant acceleration is $\alpha = 0.029 \ rad / s^2$

The displacement is $\theta = 6.58 \ rad$

According to the second equation of motion we have that

$\theta = w_i* t + \frac{1}{2} * \alpha t^2$

given that the blade started from rest

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$\theta = 0 + \frac{1}{2} * \alpha t^2$

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substituting values

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=> $t = 21.30 \ s$

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