A 420-turn circular coil with an area of 0.0650 m2 is mounted on a rotating frame, which turns at a rate of 22.3 rad/s in the presence of a 0.0550-T uniform magnetic field that is perpendicular to the axis of rotation. What is the instantaneous emf in the coil at the moment that the normal to its plane is perpendicular to the field?
a. 33.5 V
b. zero
c. 0.0673 V
d. 747 V
e. 1.50 V
a
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For each of the original chemical compositions and temperatures at 1 atmosphere of pressure for the aluminum (Al)-nickel (Ni) alloys (see Figure 5.15) listed below, give the following:
1. The phases present.
2. From the Gibbs phase rule, determine the degrees of freedom in the material. Can the composition of the phases or phases present be adjusted by changing the original chemical composition?
3. The chemical composition of each phase.
4. The atom fraction of each phase.
In a thermodynamic process involving 7.8 moles of an ideal gas, the gas is at an initial temperature of 24°C and has an initial volume of 0.040 m3
The gas expands adiabatically to a volume of 0.080 m3. For this gas, CV = 12.27 J/mol • K, and the ideal gas constant is R = 8.314 J/mol ? K. Calculate the work done by the gas during this expansion.
Which of the following is the simplest possible hydrocarbon?
A) CH4 B) H2 C) HC=CH D) H2C=CH2 E) C2H6
When pore spaces become completely filled with water, the soil is considered to be at
What will be an ideal response?