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vladimir2022 [97]
3 years ago
10

Which statements are true? Science is a collection of facts that does not evolve. We have gained all the knowledge we can from s

cience. Scientists observe natural events occurring around them. They question these observations and investigate them. All scientists follow one scientific method of investigation. If a hypothesis is not verified by the results from the scientific method, scientists may either redo the process or create a new hypothesis. Once they reach a conclusion, scientists often keep the results to themselves.
Physics
1 answer:
puteri [66]3 years ago
4 0

Answer: Scientists observe natural events occuring around them. If a hypothesis is not veriffied by the results from the scientific method, scientists may redo the process or create a new hypothesis

Explanation:

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I think the correct answer would be that because electromagnets are powerful and can be turned off and on anytime. Electromagnet is a magnet in which the magnetic field is made by the electric current that is induced to the system.
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A coin of mass m rests on a turntable a distance r from the axis of rotation. The turntable rotates with a frequency of f. What
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Answer:

\mu = \frac{r (2\pi f)^{2}}{g}

Explanation:

N = normal force acting on the coin

Normal force in the upward direction balances the weight of the coin, hence

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f = frequency of rotation

Angular velocity of turntable is hence given as

w = 2\pi f

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static frictional force is given as

f = \mu N\\f = \mu mg

The  static frictional force provides the necessary centripetal force , hence

Centripetal force = Static frictional force

m r w^{2} = \mu mg\\r w^{2} = \mu g\\\\\mu = \frac{r w^{2}}{g} \\\mu = \frac{r (2\pi f)^{2}}{g}

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3 years ago
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Why do nuclear power plants use fission rather than fusion to generate
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B. Fusion requires very high pressure and temperature.

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Nuclear fusion is the combination of atomic nuclei into larger ones with the release of a large amount of energy.

Nuclear fission is the decay process in which a heavy nuclide is bombarded with with neutrons.

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