A customer complains that the heater works sometimes, but sometimes only cold air comes out while driving. Technician A says that the A/C system may not have enough refrigerant in the system. Technician B says that the cooling system could be low on coolant. Which technician is correct?

A) Technician A only B) Technician B only C) Both technicians D) Neither technician


B

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High gas flow rates ____.

A. provide better weld coverage B. waste shielding gases C. decrease the venturi effect D. decrease contamination

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____________________ are instruments that measure both ac and dc quantities.

Fill in the blank(s) with the appropriate word(s).

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Let X and Ybe Bernoulli random variables. Let Z = XY.

a. Show that Z is a Bernoulli random variable.
b. Show that if X and Y are independent, then .

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Was Kennedy's confrontation with Khrushchev in the Cuban missile crisis a brilliant demonstration of firmness without aggressiveness or a dangerous strategy that could easily have resulted in nuclear war?

What will be an ideal response?

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