To save the most energy when you leave your cool house for an hour or so on a hot day, you should turn the temperature setting on the air conditioner
A) down.
B) up.
C) off.
D) to room temperature.
Answer: C
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Which of the following is not an abbreviation for a quark flavor?
A. u B. s C. b D. t E. r
A sound source of 150 watts radiates sound uniformly in all directions. The intensity of the sound at a distance of 4.00 m is
A. 0.389 
B. 0.403
C. 0.582
D. 0.746
E. 0.927
A long solenoid (1000 turns/m) carries a current of 25 mA and has an inside radius of 2.0 cm. A long wire which is parallel to and 4.0 cm from the axis of the solenoid carries a current of 6.0 A. What is the magnitude of the magnetic field at a point on the axis of the solenoid?
a. 51 ?T b. 61 ?T c. 43 ?T d. 81 ?T e. 1.4 ?T
Which of the following is NOT true about adding comment features to a website?
A. Do not require users to create an account before posting comments. B. Comments help a website creator gauge interest in a post or article. C. To add a comments feature, you can add a premade script to your website code. D. Spam often appears in comments.