A 0.50-m long solenoid consists of 1000 turns of copper wire wound with a 4.0-cm radius. When the current in the solenoid is 18 A, the magnetic field at a point 1.0 cm from the central axis of the solenoid is
a. 0.090 mT.
b. 0.36 mT.
c. 23 mT.
d. 36 mT.
e. 45 mT.
e
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Lobate scarps are believed to have formed on Mercury when its interior cooled and shrank
a. True b. False Indicate whether the statement is true or false
Meters: Decreasing the resistance of an ammeter's shunt resistance
A. allows it to measure a larger current at full scale deflection. B. allows it to measure a smaller current at full scale deflection. C. enables more current to pass directly through the galvanometer. D. converts it to a voltmeter.
Determine how well the above data are predicated by the appropriate correlation given in the text. Express your results in terms of the per cent difference between the experimentally determined Nusselt number and that from the equation.
An experiment was conducted in which the heat transfer from a sphere in sodium was
measured. The sphere, 0.5 in. in diameter was pulled through a large sodium bath at a
given velocity while an electrical heater inside the sphere maintains the temperature at a
set point. The following table gives the results of the experiment
GIVEN
A sphere is pulled through a sodium bath at a given velocity
Sphere diameter = 0.5 in. = 0.0127 m
Sphere temperature is kept constant
Experimental data given above
FIND
The standard deviation between the data and the appropriate correlation
SKETCH
On a winter day the temperature is 5 degrees Celsius and the humidity is 0.003 kilograms per cubic meter. (a) What is the relative humidity? (b) The air is brought into a building and heated to 20 degrees Celsius without changing the humidity. What is the relative humidity inside the building?