What is the mass of helium in the balloon

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Reference no: EM1363183

Q. A spherical balloon containing helium gas has a radius of 12.0 cm. If the balloon is at atmospheric pressure and room temperature, what is the mass of helium in the balloon? (Let the temperature be 299 K.)

Q. The power rating on a light bulb indicates how much power it would dissipate when it is hooked up to the standard household voltage of 120 V (this rating does not mean that the light bulb always dissipates the same amount of power, assume that the resistance is constant
in this case).

(a) How much power is dissipated in a light bulb that is normally rated at 100 W, if instead we hook it up to a potential difference of 60 V?

(b) How much power is dissipated in a light bulb that is normally rated at 100 W, if instead we hook it up to a potential difference of 240 V?

Reference no: EM1363183

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