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ikadub [295]
3 years ago
15

Oil having a density of 923 kg/m^3 floats on water. A rectangular block of wood 4.81 cm high and with a density of 961 kg/m^3 fl

oats partly in the oil and partly in the water. The oil completely covers the block.
(a) How far below the interface between the two liquids is the bottom of the block?
Physics
1 answer:
timurjin [86]3 years ago
8 0

Answer:

x = 2.37 cm

Explanation:

given,

density of oil = 923 kg/m³

height of the block = 4.81 cm

density of the block = 961 Kg/m³

density of water = 1000 Kg/m³

Let x be the depth of the block in the water.

 now,

Weight of block will be acting downward.

Buoyancy force will be acting on the block because of the oil and water.

At equilibrium position both weight and the buoyant force will balance.

 \rho_{wood}gh-\rho_{oil}g(h-x)-\rho_{water}gx= 0

 961\times 0.0481 - 923\times 0.0481 = -923\times x +1000\times x

 1.8278 = 77 x

   x = 0.0237 m

  x = 2.37 cm

Hence, the block is 2.37 cm in the water.

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Dear user,

Answer to your query is provided below

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The frequency of a wave is 200 Hz. The wavelength is 0.1 m. What is the period of the wave?
Aleks04 [339]
The formula for the period of wave is: wave period is equals to 1 over the frequency.waveperiod=\frac{1}{frequency}
To get the value of period of wave you need to divide 1 by 200 Hz. However, beforehand, you have to convert 200 Hz to cycles per second. So that would be, 200 cyles per second or 200/s.
By then, you can start the computation by dividing 1 by 200/s. Since 200/s is in fractional form, you have to find its reciprocal form and multiply it to one which would give you 1 (one) second over 200. This would then lead us to the value 0.005 seconds as the wave period.

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Convert Hz to cycles per second first
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Make 200/second as your divisor, so:

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get the reciprocal form of 200/s which is s/200

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2 years ago
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