Resistors in Combination: What is the equivalent resistance in the circuit shown in the figure?
A. 80 ?
B. 55 ?
C. 50 ?
D. 35 ?
Answer: C
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When a car goes around a curve of smaller and smaller radius, the centripetal force on it decreases
a. True b. False Indicate whether the statement is true or false
If molecules in a sample of gas moved so they completely missed each other, with no other effects, the gas temperature would
A) increase. B) decrease. C) remain unchanged.
A 0.40-kg mass attached to the end of a string swings in a vertical circle having a radius of 1.8 m. At an instant when the string makes an angle of 40 degrees below the horizontal, the speed of the mass is 5.0 m/s. What is the magnitude of the tension in the string at this instant?
a. 9.5 N b. 3.0 N c. 8.1 N d. 5.6 N e. 4.7 N
Belt-zone circulation on Uranus is dominated by the rotation of the planet and not by the direction of sunlight
a. True b. False Indicate whether the statement is true or false