Where on Earth would you have to be to observe a particular partial solar eclipse?
What will be an ideal response?
within a narrow and specific strip of Earth's surface less than 6000 km wide
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Bright and dark fringes are seen on a screen when light from a single source reaches two narrow slits a short distance apart. The number of fringes per unit length on the screen can be halved
A.
.B.
.C.
the wavelength is changed to 
.D.
E.
.The deviation from the way a compass needle points from the true north direction is the
a. greenhouse effect b. magnetic inclination c. magnetic declination d. magnetic resonance effect e. none of the above
Long wavelength visible light
a. will have a greater energy than short wavelength visible light. b. will have a speed that is faster than short wavelength light. c. has a higher frequency than short wavelength visible light. d. will appear blue in color to the average human eye. e. will appear red in color to the average human eye.
Which living organisms most resemble the common ancestor of all life according to genetic testing?
A) bacteria such as E. coli B) organisms living deep in the oceans around seafloor volcanic vents and in hot springs C) plankton that use sunlight as an energy source through photosynthesis D) viruses E) stromatolites