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Furkat [3]
4 years ago
8

If the mass of a material is 45 grams and the volume of the material is 8 cm^3, what would the density of the material be?

Physics
1 answer:
Svet_ta [14]4 years ago
3 0
The density of the substance is the ratio of its mass over the space it occupies. In mathematical equation, this can be expressed as,

        ρ = m / v

where ρ is density, m is mass, and v is volume. 

Substituting the known values from the given,
 
    ρ = (45 g) / (8 cm³)

     ρ = 5.625 g/cm³

<em>ANSWER: 5.625 g/cm³</em>
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On Earth, g is about 9.8 m/s^2. This will be the acceleration due to gravity.

Then, 45 kg * 9.8 m/s^2 = 441 N.
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Explanation:

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3 years ago
When gasoline is burned in the cylinder of an engine, it creates a high pressure that pushes the piston. If the pressure is 100.
Marianna [84]

Answer:

\dot W=2.1074\ hp

Explanation:

Given:

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  • diameter of the piston, d=3\ in=0.0762\ m
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<u>Now, we find the force on the piston:</u>

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A=\pi.\frac{d^2}{4}

A=\pi.\frac{0.0762^2}{4}

A=0.00456\ m^2

\therefore F=689476\times 0.00456

F=3144.2638\ N

<u>we know that Power is given as:</u>

\dot W=\frac{F.s}{t}

\dot W=\frac{3144.2638\times 0.05}{0.1}

\dot W=1572.1319\ W

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6 0
3 years ago
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Answer:

32%

Explanation:

For a heat engine, efficiency is work out divided by heat in:

η = Wₒ / Qᵢ

Since energy is balanced, heat in is the sum of work out and heat out:

Qᵢ = Wₒ + Qₒ

Therefore:

η = Wₒ / (Wₒ + Qₒ)

Given Wₒ = 710 J and Qₒ = 1480 J:

η = 710 / (710 + 1480)

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Mariulka [41]

i believe the correct answer would be a transformer

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