A homeowner has a new oil furnace which has an efficiency of 60%. For every 100 barrels of oil needed to heat his house, how much (in barrels of oil) goes up the chimney as waste heat?
A. 20
B. 60
C. 40
D. 80
E. 10
Answer: C
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When a body moves in circular motion at constant speed the velocity and acceleration point in opposite directions
a. True b. False Indicate whether the statement is true or false
Starship "Alpha" is traveling at 0.8c (? = 5/3) with respect to the identical starship "Beta." Each starship has rest length 10,000 m. The ship's engineer aboard the "Beta" measures the length of the "Alpha" as it passes by his window. What result should he get?
A. 10,000 m B. 16,667 m C. 12,500 m D. 6,000 m E. 8,000 m
If the current in the 4.0-? resistor is 1.4 A, what is the magnitude of the potential difference, VA ? VB?
a.
69 V
b.
55 V
c.
62 V
d.
48 V
e.
31 V
The "R-value" of material is not related to its ________
a. composition b. area c. thickness d. resistance to heat flow