Which of the following types of electromagnetic radiation has the smallest frequency?
a. X-rays
b. visible light
c. radio
d. gamma rays
e. infrared radiation
c
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The solar constant is a measure of
a. the amount of solar energy reaching Earth.
b. the length of the sunspot cycle.
c. the period of rotation of the Sun's equator.
d. the average number of sunspots seen during the Maunder minimum.
e. the Sun's mass.
The text states that luminous matter in the Milky Way seems to be much like the tip of an iceberg. This refers to the idea that
A) luminous matter emits white light, much like the light reflected from icebergs. B) black holes are much more interesting than ordinary stars that give off light. C) dark matter represents much more mass and extends much further from the galactic center than the visible stars of the Milky Way. D) the luminous matter of the Milky Way is essentially floating on the surface of a great sea of dark matter.
A 2.0-kg body moving along the x axis has a velocity vx = 5.0 m/s at x = 0. The only force acting on the object is given by Fx = (?4.0x) N, where x is in m. For what value of x will this object first come (momentarily) to rest?
a. 4.2 m b. 3.5 m c. 5.3 m d. 6.4 m e. 5.0 m
You are asked to select a material for a container on a ship for liquified natural gas that will be at –163°C (–260°F). For the classes of metals, ceramics, polymers, and composites give the advantages and disadvantages of the best possible material within each class of material for this design based upon subjects you have studied in Chapters 1 to 4 in this book. For example you may decide that carbon fiber reinforced epoxy is the best possible composite material for this design. Give the advantages and disadvantages of carbon fiber reinforced epoxy for this design.
What will be an ideal response?