What is the magnitude of the electric field 2.8 cm from a tiny ...

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What is the magnitude of the electric field 2.8 cm from a tiny object that carries an excess charge of 16 nC? (k = 1/40 = 9.0  109 N  m2/C2 )
 
  A) 180,000 N/C
  B) 5100 N/C
  C) 1.8  1014 N/C
  D) -180,000 N/C
  E) -5100 N/C

Question 2

An expandable container holds 2.30 mole of helium, He, gas with an initial pressure of 770 kPa and an initial volume of 2.10 L. The gas expands isothermally to a final pressure of 350 kPa.
 
  How much heat is gained by the gas during this process? (R = 8.31 J/mol  K) A) 1280 J
  B) 792 J
  C) 685 J
  D) 1370 J
  E) 1700 J

[ciecieme]

Answer to Question 1

A

Answer to Question 2

A

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TY

[ciecieme]

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