Nearsightedness is usually corrected with
A) converging lenses.
B) diverging lenses.
C) convex mirrors.
D) cylindrical lenses.
E) concave mirrors.
B
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The surface of Saturn's moon Enceladus is the most reflective of any in the solar system, suggesting very fresh ice is exposed
Indicate whether the statement is true or false
A 2000-kg sailboat experiences an eastward force of 3000 N by the ocean tide and a wind force against its sails of magnitude 6000 N directed toward the northwest (45° N of W). What is the magnitude and direction of the resultant acceleration?
Characteristic x-rays can be produced by bombarding targets with electrons. These x-rays occur when
a. electrons from higher shells fill the vacant lower shell b. electrons fill the vacant valence shell c. photons are emitted with energies on the order of 103 eV d. photons are emitted with wavelengths on the order of 103 nm
What is the basic difference between electrons in a valence and a conduction band in a semiconductor? Explain
What will be an ideal response?