In the scientific method a hypothesis is another name for
A) an observation
B) an educated guess
C) a test
D) a theory
B
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The _____ is the interval of the radio spectrum between the 21-cm hydrogen emission line and the 18-cm OH emission line; these are likely wavelengths to use in the search for extraterrestrial life
A) water hole B) habitable zone C) Arecibo beacon D) DNS zone
The period of oscillation for a signal having a frequency of 60 Hz is 60 seconds
a. True b. False Indicate whether the statement is true or false
In a single-slit diffraction experiment, the width of the central maximum is 6.0 mm. The width of the slit is then doubled as is the distance to the screen. What is the resulting width of the central maximum?
a. 12 mm b. 6.0 mm c. 24 mm d. 3.0 mm
A pair of narrow slits, separated by 1.8 mm, is illuminated by a monochromatic light source. Light waves arrive at the two slits in phase, and a fringe pattern is observed on a screen 4.8 m from the slits
If there are 5.0 complete bright fringes per centimeter on the screen near the center of the pattern, what is the wavelength of the monochromatic light? A) 700 nm B) 650 nm C) 550 nm D) 600 nm E) 750 nm