What vegetable should not be exposed to sunlight after being harvested or it will turn green and be unfit for use?
A) Potato
B) Carrot
C) Radish
D) Beet
A
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Game hunting limits are set by ____________________
Fill in the blank(s) with the appropriate word(s).
Technician A says that most manufacturers specify replacement of the air filter every 30,000 miles. Technician B recommends replacing the air filter every year. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
Technician A says that brake fluid is hazardous after it has been contaminated with metals from the brake system. Technician B says to dispose of used brake fluid in a special container. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
An electromagnet is used to support a solid piece of steel, as shown in Example 18.9. A force of 10,000 N is required to support the weight. The cross-sectional area of the magnetic core (the fixed part) is 0.01 m2. The coil has 1,000 turns. Determine the minimum current that can keep the weight from falling for x = 1.0 mm. Assume negligible reluctance in steel and negligible fringing in the air gaps.
Example 18.9
An electromagnet is used to collect and support a solid piece of steel, as shown in Figure 18.38. Calculate the starting current required to lift the load and the holding current required to keep the load in place once it has been lifted and is attached to the magnet. Assume that the cross-sectional areas of the electromagnet, load (bar), and air gap are equal.
Assumptions:
Negligible reluctance for the steel parts and negligible fringing in the air gaps.