During which phase of the moon do you expect to observe a solar eclipse?

A. first quarter
B. new moon
C. full moon
D. third quarter
E. Solar eclipses can occur at any phase of the moon.


Answer: B

Physics & Space Science

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A silicon monoxide (n = 1.45) film of 322-nm thickness is used to coat a glass camera lens (n = 1.56). What wavelength of light in the visible region (390 to 710 nm) will be most efficiently transmitted by this system? (1 nm = 10?9 m)

a. 467 nm b. 498 nm c. 623 nm d. 527 nm e. 736 nm

Physics & Space Science

How do geologists determine the relative ages of different rocks?

What will be an ideal response?

Physics & Space Science

When a glass rod rubbed with silk acquires a positive charge, the silk acquires

A. a positive charge B. a negative charge C. no charge D. it is impossible to tell which sign of charge it acquires

Physics & Space Science

A heat pump is used to heat a house in Minnesota in the winter and has half the ideal coefficient of performance for a reversible heat pump. If the outside air temperature is and the indoor temperature desired is and if it can do work at a rate of 1250 W, what is the rate of heat flow into the house?

A. 340 W B. 1100 W C. 625 W D. 300 W

Physics & Space Science