As viewed from above or face-on, a ____________ spiral galaxy has many branches and spurs, making the arms less discernible
Fill in the blank(s) with correct word
flocculent
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Spectral Series: What is the shortest wavelength in the Balmer series?
A. 328 nm B. 365 nm C. 456 nm D. 656 nm E. 820 nm
Answer the following statement(s) true (T) or false (F)
1. Suppose we create a traveling compression wave in a spring that has one end fixed. When the wave reflects from the fixed end, it will be inverted (that is, compression will become rarefaction and vice versa). 2. Suppose you are near one end of a 150-m-long cylindrical tunnel open to the air on both ends. If you give a shout, you might hear an echo.
________ in the early solar system might explain many of the observed irregularities
Fill in the blank(s) with correct word
A particle moves at a constant speed in a circular path with a radius of 2.06 cm. If the particle makes four revolutions each second, what is the magnitude of its acceleration?
a. 20 m/s2 b. 18 m/s2 c. 13 m/s2 d. 15 m/s2 e. 24 m/s2