In a thick bed of sedimentary rocks we find an igneous dike. The order of formation is
A) together.
B) igneous before sedimentary.
C) sedimentary before igneous.
D) unknown.
Answer: C
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Wave Characteristics: An electromagnetic wave travels in free space in the +y direction, as shown in the figure. If the electric field at the origin is along the +z direction, what is the direction of the magnetic field?
A. +z B. -z C. +y D. +x E. -x
The rate of heat flow by conduction through a slab does NOT depend upon the:
A. temperature difference between opposite faces of the slab B. thermal conductivity of the slab C. slab thickness D. cross-sectional area of the slab E. specific heat of the slab
Suppose you point your telescope at a distant object. Which of the following is not an advantage of taking a photograph of the object through the telescope as compared to just looking at the object through the telescope?
A) The photograph will have far better angular resolution than you can see with your eye. B) By using a long exposure time, the photograph can allow you to see objects that would be too dim to see with your eye. C) If taken with a camera with a sensitive detector such as a CCD, the photograph can capture a much larger percentage of the incoming photons than can your eye. D) The photograph provides a more reliable record of what is seen through the telescope than can a drawing made by eye.
A light beam is traveling inside a glass block that has an index of refraction of 1.46. As this light arrives at the surface of the block, it makes an angle of 53.0° with the normal
At what angle with the normal in the air will it leave the block? A) 33.2° B) It will not leave. C) 43.2° D) 59.1°