Equation of Traveling Waves: The vertical displacement y(x,t) of a horizontal string aligned along the x-axis is given by the equation y(x,t) = (6.00 mm) cos[(3.25 m-1)x - (7.22 s-1)t]. What are the (a) speed and (b) amplitude of this wave?
What will be an ideal response?
(a) 2.22 m/s (b) 6.00 mm
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When a sample of water at 0.0°C is cooled to –36.0°C and freezes in the process, 935,000 kJ of thermal energy is liberated. What is the mass of this sample of water? For water LF = 334,000 J/kg, LV = 2
256 × 106 J/kg, and the specific heat of ice is 2050 J/kg ? C°. A) 2290 kg B) 1145 kg C) 2800 kg D) 12,700 kg
Only ________ stars have rotation periods of less than a second
Fill in the blank(s) with correct word
What are the 3 parts of this type of galaxy, and which 2 might you see through a telescope?
A: Disk, bulge, and halo; would see bulge and disk, and wouldn't see halo. B: Disk, bulge, and halo; would see bulge and halo, and wouldn't see disk. C: Stars, Gas, and dust; would see gas and dust, and wouldn't see stars. D: Spirals, ellipticals, and irregulars; would see ellipticals and spirals, but wouldn't see irregulars. E: Spirals, ellipticals, and irregulars; would see irregulars and spirals, but wouldn't see ellipticals.
Astronomers have determined the detailed composition of all confirmed exoplanets
Indicate whether the statement is true or false