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2 years ago

A man inside an insulated metallic cage does not receive shock when the cage is highly charge .explain.

1 answer:

5 0

A man inside an insulated metallic cage does not receive shock when the cage is highly charged because the whole charge reside on outer surface of the cage.

If the cage was a non-conductive cage, then the current cannot pass through the cage so it cannot affect the person in the cage.

For example- If you are seated in a car (metal body) and the car is hit with lightning, it is very unlikely that the person in the car would be hit with the lightning.

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The Volume Of a Body weighing is 1200 kg is 250000 <img src="https://tex.z-dn.net/?f=cm%5E%7B3%7D" id="TexFormula1" title="cm^{3

Sindrei [870]

Answer:

$\boxed {Density = 4800 kg/m^{3}}$

Explanation:

Formula :

$\boxed {Density = \frac{Mass (kg)}{Volume (m^{3})}}$

Convert volume into standard unit :

⇒ 250000 cm³ × 10⁻⁶

⇒ 0.25 × 10⁶ × 10⁻⁶

⇒ 0.25 m³

Solve for density :

⇒ Density = 1200 kg / 0.25 m³

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1 year ago

How much heat is required to convert 50 g of ice at -5 degrees Celsius to steam?

12345 [234]

Answer:

15435 J

Explanation:

Latent heat of fusion, Lf = 334 J/g

Specific heat of ice, ci = 2.1 J / g C

Latent heat of vaporisation, Lv = 2230 J/g

Specific heat of water, cw = 4.18 J / g C

mass, m = 50 g, T = - 5 degree C

There are following steps

(i) - 5 degree C ice converts into 0 degree C ice

H1 = m x ci x ΔT = 50 x 2.1 x 5 = 525 J

(ii) 0 degree C ice converts into 0 degree C water

H2 = m x Lf = 5 x 334 = 1670 J

(iii) 0 degree C water converts into 100 degree C water

H3 = m x cw x ΔT = 5 x 4.18 x 100 = 2090 J

(iv) 100 degree C water converts into 100 degree C steam

H4 = m x Lv = 5 x 2230 = 11150 J

Total heat required

H = H1 + H2 + H3 + H4

H = 525 + 1670 + 2090 + 11150 = 15435 J

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2 years ago

calculate the work done to stretch an elastic string by 40cm if a force of 10N produces an extension of 4cm in it?

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100N is how much work is needed

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3 years ago