Is it possible for each of three current-carrying metal wires to attract the other two wires?
1.yes
2.no
1
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Which is NOT an example of the Bernoulli effect?
a. Smoke going up a chimney faster when there is a wind outside. b. A roof coming off a house in a tornado. c. A tarp covering a truck lifting up as the truck drives. d. Drinking a liquid through a straw. e. A piece of paper held in front of your lips rising as you blow air over it.
For every 100 gallons of gasoline you use in your car, the amount that actually goes into moving the car down the road is roughly
A) 10 gal. B) 50 gal. C) 2 gal. D) 98 gal. E) 75 gal.
A mass, m, is hung from a spring that has a spring constant, k, and the system is set into oscillation. The period of the oscillation is measured and recorded as T. If the mass is doubled and the spring is replaced by a less-stiff one that has half the spring constant, k/2, what will happen to the subsequent period of oscillation of the new spring-mass combination?
1.It will remain the same. 2.It will quadruple. 3.It will double. 4.It will halve.
Large-capacity (~ 22 ft3) refrigerators that are freezer on top use about 600 kWh/yr while side by side refrigerator-freezers of the same capacity use about 660 kWh/yr. Each costs about $1000
What will be the total cost after 19 years? Which one should you buy? What considerations enter into your decision?