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Author Question: Four point charges are on the rim of a circle. The charges are (in mC) +0.50, +3.0, -1.0, -0.50 . If ... (Read 37 times)

Redwolflake15

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on: Jul 28, 2018
Four point charges are on the rim of a circle. The charges are (in mC) +0.50, +3.0, -1.0, -0.50 . If the electrical potential at the circle's center due to the +0.5 charge alone is 4.5  104 V, what is the total potential at the center due to the four charges combined?
 a. 18  104 V
  c. zero
  b. 4.5  104 V
  d. -4.5  104 V

Question 2

A helicopter stays aloft by pushing large quantities of air downward every second. What mass of air must be pushed downward at 30.0 m/s every second to keep a 1000 kg helicopter aloft?
 a. 120 kg
  c. 327 kg
  b. 245 kg
  d. 490 kg


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phuda

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Reply #1 on: Jul 28, 2018
Answer to Question 1

A

Answer to Question 2

C


Redwolflake15

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Reply 2 on: Jul 28, 2018
Excellent

peter

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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