A 3.00 kg hollow sphere of radius 5.00 cm starts from rest and rolls without slipping down a 15.0 degree incline. If the length of the incline is 100 cm, then the velocity of the center of mass of the hollow sphere at the bottom of the incline is
A. 3.02 
B. 2.59
C. 2.37
D. 2.02
E. 1.75
E. 1.75
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Monochromatic light (? = 500 nm) is incident on a soap bubble (n = 1.40). How thick is the bubble (in nm) if destructive interference occurs in the reflected light?
a. 102 b. 179 c. 54 d. 1 e. 89
As material flows into a black hole
a. the material will experience time dilation. b. the material will become hotter. c. the material will produce an absorption spectrum. d. the material will appear to us to fall into the black hole very rapidly. e. a and b
A vector is located in the x-y plane. The x- and y-components of this vector are 4.00 m and 3.00 m, respectively. Find the angle that this vector makes with the positive y-axis
A) 53.1° B) 36.9° C) 126.9° D) 22.4° E) 48.6°
If we use 67 W of power to heat 148 g of water, how long will it take to raise the temperature of the water from 15°C to 25°C?
The specific heat of water is 4190 J/kg•K. A) 93 s B) 5.3 s C) 22 s D) 114 h