the density of a gas filled in an electric bulb is 0.75kg/m3. after light is turned on. the pressure inside bulb changes from 4×10to the power 4 pa to 9×10to the power 4 pa. what is the measure of u rms?
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Answered by
4
Answer:
B. 200. In this question, we have to first use the formula U1 = root over 3P1by d1. Then, the change in Urms, i.e., Delta U needs to be found out. This is the difference between the two pressure's.
While calculating it, root over 3 divided by 'd' will stay as it is and since we have the value of density as 0.75 kg/cubic meter, it can be provided to it. Then, multiply the difference of root over pressure's to this value and the result will be 200.
Explanation:
Answered by
6
Answer: Urms=✓3p/d
=✓3 (✓90000 - ✓40000) / 0.75
=✓3 (300 - 200) / 0.75
=√4 × 100
= 200
Explanation: There is a pressure difference after the switch is turned on..
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