Which of the following objects is not a close approximation of a thermal emitter?
A) hot, thin gas
B) a star
C) a filament in a light bulb
D) you
E) a planet
A
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Body waves can be divided into two types—primary waves and secondary waves. What is the difference between these two types of body waves?
What will be an ideal response?
The discovery of any kind of life beyond the Earth would
A) cause a profound change in perspective of the whole of humanity B) be of interest to all scientists, but of little interest to the wider public C) be of no interest to anyone at all D) only be on interest to biologists
A fish normally displaces its own
A) volume of water. B) weight of water. C) both of these D) neither of these
The left-hand end of a glass rod is ground to a spherical surface. The glass has index of refraction 1.50
A small object 4.00 mm tall is placed on the axis of the rod, 37.0 cm to the left of the vertex of the spherical surface. The image is formed in the rod, 50.0 cm to the right of the vertex. (a) What is the magnitude of the radius of curvature of the spherical surface at the end of the rod? (b) What is the height of the image?