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vovikov84 [41]
3 years ago
11

A chocolate brownie has a volume of 360cubic centimeters and a mass of 270grams. Calculate its density.

Physics
1 answer:
il63 [147K]3 years ago
5 0

Answer:

  • Its density is 0.75 grams per cubic centimeters.

Explanation:

<u>Given that</u>:

  • A chocolate brownie has a volume of 360 cubic centimeters and a mass of 270 grams.

<u>To Calculate</u>:

  • Its density.

<u>We know that</u>:

  • Density = Mass/Volume

<u>We have</u>:

  • Mass = 270 g
  • Volume = 360 cc

<u>Finding its density</u>:

⟶ Density = 270/360

⟶ Density = 0.75

<u>Hence</u>,

  • Its density is 0.75 g/cc.
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According to right hand rule, your finger (direction of electric field) would be pointing in the positive  x-axis  i.e towards your right let your palms be face toward the direction of the magnetic field i.e negative y-axis  (toward the ground ) Then anywhere your thumb stretched out is facing is the direction of propagation of the wave here in this case is the negative  z -axis

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Given that I = 7.43 \frac{kW}{cm^2} =  7.43 \frac{*10^3}{*10^-{4} }= 7.43*10^7 \frac{W}{m^2}

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                   E_{rms} = \sqrt{\frac{I}{0.5*c*\epsilon_o} }

Substituting values as given on the question

                E_{rms} = \sqrt{\frac{7.43 *10^7[\frac{W}{m^2} ]}{0.5 * 3.08*10^8 *8.85*10^{-12}} }

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                  A_E = \sqrt{2} * E_{rms}

                         = \sqrt{2} * 2.37*10^5

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                       A_M = \frac{A_E}{c}

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                      A_M = \frac{3.35 *10^5}{3.0*10^8}

                             A_M= 1.12 *10^{-3} T

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