A 40-turn circular coil (radius = 4.0 cm, total resistance = 0.20 ?) is placed in a uniform magnetic field directed perpendicular to the plane of the coil. The magnitude of the magnetic field varies with time as given by B = 50 sin(10 ?t) mT where t is measured in s. What is the magnitude of the induced current in the coil at 0.10 s?
a. 50 mA
b. 1.6 A
c. 0.32 A
d. zero
e. 0.80 A
b
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An incompressible fluid is flowing through a vertical pipe with a constriction. The wide section is 2.00 cm in diameter and is at the top of the pipe. The pressure of the fluid in the wide section at the top is 200 kPa. The velocity of the fluid in the wide section is 4.00 m/s. The narrow section is located 8.00 m below the wide section. What is the diameter of the narrow section for the pressure of the fluid in the narrow section to equal the pressure in the wide section? (density of the fluid is 680
A. 1.10 cm B. 1.20 cm C. 1.31 cm D. 1.42 cm E. 1.55 cm
Since all the chemicals that deplete ozone occur naturally in the ozone layer anyway, there is no need to worry about releasing more of them into the air
What will be an ideal response?
Entropy: When water at 0°C freezes, the entropy of the water
A. increases. B. decreases. C. remains constant. D. could either increase or decrease; it depends on other factors.
If a person sits on a bathroom scale while riding on a Ferris wheel, the reading on the scale will be lowest while passing through the ________ point (indicate a point in the path).
Fill in the blank(s) with the appropriate word(s).