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3 years ago

Which explanation is based on empirical evidence? Ancient text reveals that the universe is about 6000 years old

Physics

1 answer:

riadik2000 [5.3K]3 years ago

5 0

Answer:

Empirical evidence is evidence that is verified by observation or experience, rather than logic or theory.

Then an explanation is based in on empirical evidence is an explanation that uses a fact that was seen or experienced.

The case here:

"Ancient text reveals that the universe is about 6000 years old"

Is not empirical, because there is no observation or experience here, this is only a book that says the opinion of who wrote it.

An example of an empirical explanation would be:

"The universe is at least X years old because we can see remanents that are X years old"

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A solid cylinder is mounted above the ground with its axis of rotation oriented horizontally. A rope is wound around the cylinde

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Answer:

(a)10.5 rad/s2

(b) 20.9 rev

Explanation:

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T = mg = 53*9.81 = 519.93 N

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This solid cylinder would have a moment of inertia around it's rotating axis of:

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(a)We can use Newton's 2nd law to calculate the angular acceleration exerted by such torque on the solid cylinder

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$\theta = \frac{\alphat^2}{2} = \frac{10.5*5^2}{2} = 131.3 rad$

Since each revolution equals to $2\pi rad$ of angle, we can calculate the number of revolution it makes

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Answer:

29.2 ft/s

Explanation:

The distance of the light's projection on the wall

y = 13 tan θ

where θ is the light's angle from perpendicular to the wall.

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w = (θ/t)

θ = wt = (2πt/3)

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y = 13 tan θ

(dy/dt) = 13 sec² θ (dθ/dt)

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when θ = 15°

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