A current in a solenoid coil creates a magnetic field inside that coil. The field strength is directly proportional to:
a. the coil area.
b. the current.
c. Both A and B are valid choices.
d. None of the above choices are valid.
b
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A fluid is flowing with an average speed of 1.5 m/s through a tube that has a radius of 2.0 mm and is 18 cm long. The drop in pressure is 967 Pa. What is the viscosity of the fluid?
A) 0.028 N ? s/m2 B) 0.0056 N ? s/m2 C) 0.013 N ? s/m2 D) 0.0034 N ? s/m2 E) 0.0018 N ? s/m2
A steel bridge is 1000 m long at -20°C in winter. What is the change in length when the temperature rises to 40°C in summer? The average coefficient of linear expansion of this steel is 11 × 10-6 K-1
A) 0.33 m B) 0.44 m C) 0.55 m D) 0.66 m
Determine the molar analysis of standard air (79% N2, 20% O2, and 1% argon, by volume) with 100 ppm of radon gas at 101 kPa, 20ºC.
What will be an ideal response?
A 100 liter water tank is filled to the brim with water when the temperature is 5.00 
Water has a coefficient of volume expansion of 
If the temperature of the water tank is increased to 60.0 
what is the volume of water that overflows the tank (ignore the expansion of the tank)?
A. 1.14 liters B. 1.40 liters C. 1.75 liters D. 2.01 liters E. 2.44 liters