Solar prominences have twisted and looped shapes because of the solar magnetic field
a. True
b. False
Indicate whether the statement is true or false
True
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Thermal Expansion: As shown in the figure, a bimetallic strip, consisting of metal G on the top and metal H on the bottom, is rigidly attached to a wall at the left. The coefficient of linear thermal expansion for metal G is greater than that of metal H. If the strip is uniformly heated, it will
A. curve upward. B. curve downward. C. remain horizontal, but get longer. D. remain horizontal, but get shorter. E. bend in the middle.
You want to have an electron in an energy level where its speed is no more than 66 m/s. What is the length of the smallest box (an infinite well) in which you can do this? (h = 6.626 × 10-34 J ? s, mel = 9.11 × 10-31 kg)
A) 5.5 µm B) 1.4 µm C) 11 µm D) 2.8 µm
What is the average power dissipation in a series RC circuit if R = 5.00 k?, C = 2.00 ?F, and V = 170 cos (300t)?
a. 0.930 W b. 2.60 W c. 28.2 W d. 157 W e. 5.20 W
Two point charges of magnitude 4.0 ?C and -4.0 ?C are situated along the x-axis at x1 = 2.0 m and x2 = -2.0 m, respectively. What is the electric potential energy of this system of charges?
A) -36 mJ B) 36 mJ C) 0 J D) -72 mJ E) 72 mJ