An unknown resistor is wired in series and an ammeter and a voltmeter are placed in parallel across both the resistor and the ammeter. This network is then placed across a battery.
If one computes the value of the resistance by dividing the voltmeter reading by the ammeter reading, the value obtained A) is the true resistance.
B) is greater than the true resistance.
C) is less than the true resistance.
D) could be anything. It depends on other factors.
Question 2The equation of motion of a particle undergoing simple harmonic motion is y = 2.0 sin(0.60t), where y is in cm. At t = 0.60 s determine the particle's:
(a) displacement.
(b) velocity.
(c) acceleration.
Question 3The heat of fusion of ice is 80. kcal/kg-C. When 50. g of ice at 0C is added to 50. g of water at 25C, what is the final temperature?
What will be an ideal response?
Question 4Consider an open pipe of length L. What are the wavelengths of the three lowest tones produced by this pipe?
A) 4L, 2L, L
B) 2L, L, L/2
C) 2L, L, 2L/3
D) 4L, 4L/3, 4L/5
Question 5What happens to the rate of most chemical reactions as the temperature decreases?
A) the rate of reaction drops rapidly
B) the rate of reaction drops only slightly
C) the rate of reaction increases rapidly
D) the rate of reaction stays the same
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