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Shtirlitz [24]
3 years ago
14

Which of these describes a physical change? Choose the correct answer. You may only choose one.

Chemistry
1 answer:
Molodets [167]3 years ago
5 0

Answer:

A. Wood logs are burned in a fire

Explanation:

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Two hydraulic cylinders are connected. If the diameter of one piston is twice the other, the how does the pressure experienced b
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They experience the same pressure

Explanation:

To answer this question, we recall Pascal's, Law Pascal's law states that  an increase in pressure at a point in a confined cylinder containing a fluid, there is also an equal increase at all other points in that cylinder.

According to Pascal's law the pressure if the pressure expereienced by the larger diameter piston increases, the pressure experienced by the smaller diameter piston also increases by the same amount

However considering that pressure = Force/area F1/A1 =F2/A2

thus where A1 = πD²÷4 and A2 = πD²÷ 16 we have

we have F1×4/πD² = F2×16/πD² or F1 = 4× F2

They experience the same pressure but the larger cylinder delivers four times the force transmitted from he outside to the smaller cylinder

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During a volcanic eruption, large amounts of poisonous gases and particles are released into the atmosphere. How do some of thes
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Why is it useful to know the background level of extinction?
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