Waves are altered when they enter shallow water. They change
A) direction by refraction, they steepen and break.
B) direction by refraction, they increase in speed, steepen, and break.
C) direction by reflection, they increase in energy, steepen, and break.
D) intensity by refraction, they lose energy, steepen and break.
Answer: A
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Carnot Engine: If the efficiency of a Carnot engine were to be 100%, the heat sink would have to be
A. at absolute zero. B. at 0°C. C. at 100°C. D. infinitely hot.
Which of the following is not generally true of all the terrestrial world lithospheres?
A) The lithosphere is broken into a set of large plates that float upon the softer rock below. B) Rock in the lithosphere is stronger than rock beneath it. C) The lithosphere extends from somewhere in the mantle all the way to the surface. D) The thickness of the lithosphere depends on interior temperature, with cooler interiors leading to thicker lithospheres.
The H3O+ ion is called the ______________ ion
Fill in the blank(s) with correct word
An unclad optical fiber has index of refraction 1.70 . What is the acceptance angle for this fiber? The acceptance angle is the greatest angle at which the light enters the end of the fiber and still causes total internal reflection
a. 38.7° c. 39.7° b. 51.3° d. Any angle will be accepted.