The direction of an electric field is defined as the direction of ...

[c0205847]

The direction of an electric field is defined as the direction of force on
 
  A) a positively-charged particle.
  B) a negatively-charged particle.
  C) any charged particle.

Question 2

An aluminum wire and a steel wire, each of length 2.0 m, are hung from the ceiling. A 5.0-kg mass is suspended from the lower end of each wire.
 
  The aluminum wire has a diameter of 2.2 mm. What must be the diameter of the steel wire if it is to stretch the same distance as the aluminum wire, so that the two wires maintain equal lengths after the masses are attached? Young's modulus for aluminum is 0.70  1011 N/m2 and for steel it is 2.0  1011 N/m2.

[wuly]

Answer to Question 1

Answer: A

Answer to Question 2

1.3 mm

[c0205847]

Excellent

[nguyenhoanhat]

Thanks for the timely response, appreciate it