A series LRC circuit has a sinusoidal voltage supplied to it at 197 kHz with a peak voltage of 270 V, a 41-k? resistance, a 14-µF capacitor, and a 63-H inductance. What is the peak current for this circuit?
A) 3.5 ?A
B) 2.3 ?A
C) 4.2 ?A
D) 6.6 ?A
A
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A 6 cm diameter cooling coil tube has a surface temperature of 5ºC when air at 25ºC and 100 kPa flows around it at 10 m/s. Estimate the location on the tube where the maximum convection heat transfer coefficent occurs and determine the amount of heat transfer per unit area.
According to Heisenberg's uncertainty principle, electrons are more unpredictable than protons. This is because electrons
A) are negatively charged rather than positively charged. B) interact more strongly with other particles. C) have a smaller mass. D) have a smaller volume E) interact more weakly (i.e., less strongly) with other particles.
In the figure, a 1.6-kg weight swings in a vertical circle at the end of a string having negligible weight. The string is 2 m long. If the weight is released with zero initial velocity from a horizontal position, its angular momentum (in kg?m2/s) at the lowest point of its path relative to the center of the circle is approximately
A. 40 B. 10 C. 30 D. 20 E. 50
Young's Modulus: A wire of diameter 0.20 mm stretches by 0.20% when a 6.28-N force is applied to it. What is Young's modulus for this wire?
A. 2.5 × 1010 Pa B. 1.0 × 1011 Pa C. 2.5 × 1012 Pa D. 1.0 × 1012 Pa