2. Sometimes? are too great for a family to deal with alone

You wish to make 19 ohm electric heating coil from 18 gauge nichrome wire. The resistivity of nichrome is 1E-4 ohm-cm and the cross-sectional area of 18 gauge wire is 0.001276 in2.

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If angle A is a complement of angle B, angle B and angle C are vertical angles, and the supplement of C has a measure of 140°. Find the measure of A.

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The volume of a rock is found to be 0.00018 m^3. If the rock's specific gravity is 2.50, what is its weight? (a) 5.41N (b) 3.62 Ib (c) 1.009N (d) 0.991 Ib (e) none of these

The value of the critical Reynolds number for the flow over a flat plate is 5 x10^5. The significance of the value is: (a) The boundary layer will be turbulent where the Reynolds number is less than this value.

The specifications of an electronic device are 24 / - 0.4 Amps. When the device exceeds specifications the average quality cost is $32.00. A sample of the devices had an average value of 23.9 Amps and a standard deviation of 0.211 Amps.

A vacuum gauge indicates that the pressure of air in a closed chamber is 02 bar (vacuum) The pressure of the surrounding atmosphere is equivalent to 750 in of mercury The density of mercury is 13.95 g / cn and the acceleration of gravity is 9.8.

The Reynolds number for flow over a fixed horizontal flat plate is constant throughout its length. a) True b) False

Briefly describe the function of the thermostatic expansion valve in a vapour compression refrigeration system