Whereas web usability deals with ensuring access to web-based information, web accessibility involves designing a website that all visitors can use to quickly satisfy their goals.
Answer the following statement true (T) or false (F)
False
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Which of the lines in the figure represents the normal to the surface at point P?
 a. 1 b. 2 c. 3 d. 4 e. none of the aboveWhich of the following studies is best suited to astronomical observations that fall into the category called time monitoring?
A) studying how a star's brightness varies over a period of 3 years B) studying how different planets differ in their surface compositions C) measuring the rotation rate of a distant star D) determining the age of the solar system
An inventor suggests that a house might be heated by using a refrigerator to draw energy as heat from the ground and reject energy as heat into the house. He claims that the energy supplied to the house as heat can exceed the work required to run the refrigerator. This:
A. is impossible by first law B. is impossible by second law C. would only work if the ground and the house were at the same temperature D. is impossible since heat energy flows from the (hot) house to the (cold) ground E. is possible
Two glass slides are separated by a thin layer of plastic. The glass has an index of refraction nglass and the plastic has an index nplastic. The two indices are not equal. If nplastic = 1.50, for what minimum non-zero thickness of plastic will the transmitted light be for a beam of wavelength 600 nm?
1.400 nm 2.200 nm 3.100 nm 4.One needs to know which of the indices is the greater to solve this.