An eyeglass lens is cut with one surface having a radius R1 and the other surface having a radius R2, with R1 < R2 . Both positive radii are measured from the same side with R2 being the side closer to the eye. Is this convex-concave lens a converging lens or a diverging lens?
a. This is neither, since a lens cannot be made this way.
b. This is a diverging lens.
c. This can be either a converging or diverging lens, as more information is needed for a final determination.
d. This is a converging lens.
D
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The allowed shapes for orbits under the force of gravity are ___________________________.
What will be an ideal response?
According to the nuclear energy curve, would fusion or fission or neither release nuclear energy from gold [atomic number 79], and why?
A) Fission, because then the reaction products have higher atomic numbers and thus a higher nuclear energy. B) Fusion, because then the reaction product has a higher atomic number and thus a lower nuclear energy. C) Fission, because then the reaction products have lower atomic numbers and thus a lower nuclear energy. D) Neither, because all other elements have higher nuclear energies than carbon. E) Fusion, because then the reaction product has a lower atomic number and thus a higher nuclear energy.
If a = 3.0 mm, b = 4.0 mm, Q1 = 60 nC, Q2 = ?80 nC, and q = 36 nC in the figure, what is the magnitude of the electric force on q?
a.
5.0 N
b.
4.4 N
c.
3.8 N
d.
5.7 N
e.
0.60 N
Seismic waves are classified as body waves and surface waves. An example of a body wave is a
A) Primary wave (P-wave). B) Love wave. C) Rayleigh wave. D) Tertiary wave (T-wave).