Applications to Astronomy: Estimate the observed wavelength for the 656 nm line in the spectrum of a star which is 100 million light-years from us if H = 20 
? (c = 3.00 × 108 m/s)
A. 620 nm
B. 640 nm
C. 660 nm
D. 690 nm
Answer: C
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A fluid is drawn up through a tube as shown in the figure. If the height difference from the top of the tank to the bottom of the siphon is H = 1.40 m, then what is the outflow speed? Assume the pressure is the same at the top of the tank and at the siphon outlet
?
a.
3.70 m/s
b.
27.4 m/s
c.
5.24 m/s
d.
6.86 m/s
An object is dropped from a position of rest. At the end of the first second of free fall it will have traveled about
1) 0 m 2) 5 m 3) 10 m and its velocity will be about 4) 0 m/s. 5) 5 m/s. 6) 10 m/s.
A body at the end of a spring oscillates up and down ten times in five seconds. The period of oscillation is __________
Fill in the blank(s) with correct word
Gravitational Potential Energy: A certain spherical asteroid has a mass of is 4.65 × 1017 kg and a radius of 39,600 m. If a 150-kg object is dropped from rest at an altitude of 12,400 m above the surface of this asteroid, with what speed will it hit the surface? (G = 6.67 × 10-11 N ? m2/kg2)
A. 19.3 m/s B. 22.7 m/s C. 26.2 m/s D. 18.2 m/s E. 13.8 m/s