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2 years ago

An object weighing 2.7n while in air and 1.2n when completely immersed in water.find the relative density of the object

Physics

1 answer:

Elden [556K]2 years ago

8 0

Answer:

1.8 = relative density (there are no units for relative density)

Explanation:

It displaces water equal to it's volume and gets buoyancy equal to that amount of water

2.7 - 1.2 = 1.5 N of buoyancy

density of water = 1 gm /cc

1.5 N = m (9.81)

m of water displaced = .1529 kg

152.9 cc of water will produce this buoyancy....this is the volume of the object

find mass of object 2.7 = m (9.81) shows m = .2752 kg = 272.5 gm

density = mass/ volume = 272.5 / 152.9 = 1.8 gm / cc

Relative to water (which is 1 gm / cc) the relative density is 1.8

====> it is 1.8 times denser than water and will sink when in water....

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Answer:

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Explanation:

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d = 180*4.285 = 771.3m

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3 years ago

What did Thomson’s and Rutherford’s experiments have in common? They both used charged particles in their experiments. They both

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Answer:

Both Thomson and Rutherford used charged particles in their experiments.

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3 years ago

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3 years ago

. An object has a position given by ~r(t) = [3.0 m − (4.00 m/s)t]ˆı + [6.0 m − (8.00 m/s2 )t 2 ]ˆ , where all quantities are in

kupik [55]

Answer:

Explanation:

The position is $r(t) = [3.0 \text{ m} - (4.00 \text{ m/s})t]\hat{i} + [6.0 \text{m} - (8.00 \text{ m/s}^2 )t^2 ]\hat{j}$ .

The velocity is the first time-derivative of r(t).

$v(t) = \dfrac{d}{dt}r(t) = -4.00\,\hat{i} -16t\,\hat{j}$

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3 years ago

Please help me whit this question

mariarad [96]

Answer:

Gypsum

Explanation:

Gypsum is a soft sulfate mineral composed of Calcium Sulfate di-hydrate. It is widely used in composition of fertilizer. It is also known as land plaster. On adding gypsum to soil, the quality of soil is improved. It conditions the soil and adds nutrients. The properties of soil is improved. Hence, the correct answer is Gypsum.

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pls mark brainlist

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