A convex lens is placed on a flat glass plate and illuminated from above with monochromatic red light. When viewed from above, concentric bands of red and dark are observed
What does one observe at the exact center of the lens where the lens and the glass plate are in direct contact? A) a bright red spot
B) a dark spot
C) a rainbow of color
D) a bright spot that is some color other than red
B
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A rifle is aimed horizontally at the center of a large target 60 m away. The initial speed of the bullet is 240 m/s. What is the distance from the center of the target to the point where the bullet strikes the target?
a. 48 cm b. 17 cm c. 31 cm d. 69 cm e. 52 cm
Why is our galaxy called the 'Milky Way?'
A: The term 'Milky Way Galaxy' is derived from the Greek word for milk, and there appeared to be a stream of milk running across the sky. B: A certain candy company paid an insane amount of money to have the entire galaxy named after one of its products. C: The name was chosen during a 1980 International Astronomical Union conference. D: "Milky Way" is a mis-translation of the original Sumerian name which meant "river of tears." E: The name "Milky Way" refers to a mystical treatise written by a stargazing Italian monk during the Renaissance period.
The maximum distance that the particles of a wave's medium vibrate from their rest position:
a) Frequency b) Wavelength c) Wave Speed d) Amplitude
The ______________ for compounds are written by putting the composing elements' symbols adjacent to each other, with subscripts indicating the number of atoms of each
a. equations b. molecules c. isotopes d. formulas