The dominant semiconducting material now in use is

A. silicon.
B. carbon.
C. germanium.
D. gallium.


Answer: A

Physics & Space Science

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Find the circulation for the path shown.



A. -(4 A)
B. (4 A)
C. (28 A)
D. -(28 A)
E. (7 A)

Physics & Space Science

Vision Problems: A nearsighted person has a far point of 50 cm for his right eye and 150 cm for his left eye. For each eye, what power contact lens will allow the person to see gorgeous sunsets?

What will be an ideal response?

Physics & Space Science

Your textbook discusses the cosmic calendar, a model of the history of the universe scaled to a single year. The length of time represented by one month on this cosmic calendar is therefore closest to

A) 1 billion years. B) 1 1000 years. C) 10 million years. D) 10 billion years. E) 1 million years.

Physics & Space Science

Solar system space is occupied by very small, solid particles that are called ______________

Fill in the blank(s) with correct word

Physics & Space Science