What is the most abundant element in Earth's crust? What is the second most abundant element?
What will be an ideal response?
oxygen,silicon
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A series RLC circuit is connected across a 240-Hz AC source, where ?Vmax = 140 V, R = 480 ?, C = 0.250 ?F, and L = 3.25 H. What is the average power delivered to this circuit?
a. 77.9 W b. 1.78 W c. 3.56 W d. 0.890 W
The constellation shaped like a big square (the "great square of . . . ") is
A) Cassiopeia. B) Pegasus. C) Canis Major. D) Taurus. E) Andromeda.
Europa's visible surface:
A) contains a very clean liquid. B) contains several craters. C) has long cracks in its icy crust. D) has a terrain resembling a liquid stream.
A rectangular coil, with corners labeled ABCD, of length L and width w is placed in a magnetic field B as shown in Figure 27-6
If there is a current I flowing through this coil, what is the direction of the force acting on section AB of this coil? A) perpendicular to and into the page B) perpendicular to and out of the page C) in the direction of the magnetic field D) in the opposite direction of the magnetic field E) none