A simple series circuit contains a 6.0-? resistor, an ideal 15-V DC power supply, and an 18-H inductor. What the time constant of this circuit?
A) 3.0 s B) 110 s
C) 0.33 s D) None of the given answers are correct.
A
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A brass rod, 75.0 cm long and having a cross-sectional area of 2.50 cm2, conducts heat from a large furnace at 375°C into a very large cold water bath at 10.0°C without losing any heat at the lateral surface of the rod
Steady state has been established, and the thermal conductivity of brass is 109 W/m?K. The rate at which the entropy of the system (furnace plus water) is changing is closest to A) 6.74 × 10-2 W/K. B) 2.64 × 10-2 W/K. C) 2.05 × 10-2 W/K. D) 3.54 × 10-2 W/K. E) 4.69 × 10-2 W/K.
No known white dwarf has a mass greater than the Chandrasekhar limit
Indicate whether the statement is true or false
A 100-kg spacecraft has a sail of area 300 m2 that is absorbing sunlight of intensity 800 W/m2 . What is the resulting acceleration of the spacecraft?
a. 2.4 m/s2 b. 2.7 × 10^–6 m/s2 c. 8.0 × 10^–6 m/s2 d. 3.8 × 10^–5 m/s2
A device that makes use of a bimetallic strip is a
a. thermometer b. thermostat c. choke control in an old automobile d. all of the above e. none of the above