Appliances with three-pronged plugs compared to those with two-prong plugs are
1.safer to use and connected to ground.
2.no safer to use and ungrounded.
3.more dangerous to use and connected to ground.
4.safer to use and ungrounded.
1
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In the typical household AC voltage of 120 V, what is the peak voltage?
a. 170 V c. 85 V b. 240 V d. 120 V
In the two-slit experiment, for the condition of dark fringes, the value of m = +1 corresponds to a path difference of 3?/2
Indicate whether the statement is true or false
What is the rms speed of a helium atom:
(a) at 5. K? (b) at -196.° C (the boiling point of N2)? (c) at 100.° C?
Why do we have seasons on Earth?
a) Season are caused the Sun moving through the constellations of the zodiac b) the spin axis of the Earth titled 23.5 with respect to a line normal to the plane of orbit c) the earth's distance from the Sun varies, so that it is summer the we are closer to the Sun and winter when we are farther from the Sun The spin axis of the Earth is titled 23.5 with respect to a line normal to the plane of orbit