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Home Q & A Board Science-Related Homework Help Physics Astronomy
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Thisisdumb Thisisdumb
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6 years ago
Two point charges of magnitude + 4.00 C and - 6.00 C are placed along the x-axis at x = 0 cm and x = 40.0 cm, respectively.
 
  Where must a third charge, q, be placed along the x-axis so that it does not experience any net force because of the other two charges? A) 0.200 m
  B) 1.78 m
  C) - 0.180 m
  D) - 1.78 m
  E) 0.180 m

Question 2

What is the beat frequency of two sounds that have equal amplitudes and frequencies of and 444. Hz?
 
  What will be an ideal response?

Question 3

On a cold winter day, the outside temperature is -20C and the inside temperature is maintained at 20C. There is a net heat flow to the outside through the walls, roof, etc., of 25 kW.
 
  What is the rate of increase of the entropy of the universe as a result of this? A) 13 W/K
  B) 25 W/K
  C) 85 W/K
  D) 99 W/K
  E) 0 W/K

Question 4

A mass is attached to a spring. It oscillates at a frequency of 4.0 Hz when displaced a distance of 2.0 cm from equilibrium and released. What is the maximum velocity attained by the mass?
 
  A) 0.08 m/s
  B) 0.32 m/s
  C) 0.02 m/s
  D) 0.40 m/s
  E) 0.50 m/s
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mlevans624mlevans624
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