In diagrams of magnetic fields, the symbol
is used to represent
A. the region of no magnetic field.
B. the north magnetic field.
C. the magnetic field coming out of the paper.
D. the magnetic field going into the paper.
E. the magnetic field.
D. the magnetic field going into the paper.
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Power: How much does it cost to operate a 25-W soldering iron for 8.0 hours if energy costs 8.0¢/kWh?
A. $1.50 B. 25¢ C. 16¢ D. 1.6¢
You wish to obtain a magnification of -2 from a convex lens of focal length f. The only possible solution is to
A) place a virtual object at a distance 3f/2 from the lens. B) place a real object at a distance 3f/2 from the lens. C) place a virtual object at a distance 2f/3 from the lens. D) place a real object at a distance 2f/3 from the lens. E) place a virtual object at a distance 5f/3 from the lens.
Molecular clouds are mapped using CO instead of hydrogen because CO is much more abundant than hydrogen in molecular clouds
Indicate whether the statement is true or false
It is possible for a mixture of hot water (90 °C) and ice to have a final equilibrium temperature of 0 °C
What will be an ideal response?