A 220-V electric heater has two heating coils that can be switched such that either coil can be used independently or the two can be connected in series or parallel, for a total of four possible configurations. If the warmest setting corresponds to 2,000-W power dissipation and the coolest corresponds to 300 W, find the resistance of each coil.
What will be an ideal response?
Known quantities:
Voltage of the heater, maximum and minimum power dissipation; number of coils, schematics of the configurations.
Find:
a) The resistance of each coil
b) The power dissipation of each of the other two possible arrangements.
Analysis:
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Goat meat is known as Chevon or _____.
Fill in the blank(s) with the appropriate word(s).
Two technicians are discussing dual-stage airbags. Technician A says that a deployed airbag is safe to handle regardless of which stage caused the deployment of the airbag. Technician B says that both stages ignite, but at different speeds depending on the speed of the vehicle. Who is right?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
Follow the steps of the Systematic Approach of Section 14.4—that is, (1) identify the system, (2) determine whether the process is batch or rate, (3) construct a schematic diagram with inputs and outputs, (4) Label known material quantities or rates of flow and so on. The feed to a distillation column contains 37 percent benzene, the remainder toluene. The overhead (product) contains 55 percent benzene and the bottoms (waste) contains 5.0 percent benzene. Calculate the percentage of the total feed that leaves as product.
What will be an ideal response?
The priming effect refers to the excretion of growth promoting substance by certain bacteria during decomposition of fresh organic residues
Indicate whether the statement is true or false