The second most abundant element in the solar system is
A) silicon. B) helium. C) oxygen. D) hydrogen. E) carbon.
C
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An ideal solenoid of radius a has n turns per unit length and current I. The magnetic flux ?B through any circular area of radius a inside the solenoid, centered on and perpendicular to the solenoid axis, is
A.
.B.
.C.
D.
E.
You are in the northern hemisphere and the season is winter. The Sun is above a geographic point in the southern hemisphere and below the celestial equator
a. True b. False Indicate whether the statement is true or false
An RC circuit is connected across a DC voltage source through an open switch. As soon as the switch is closed, the capacitor charges linearly as a function of time
Indicate whether the statement is true or false
It is diffraction that limits the ________ of a telescope's objective
A) magnification B) resolution C) light grasp D) wavelengths E) frequencies