Compare and contrast Jupiter and the brown dwarf in the Gliese 229 system
What will be an ideal response?
Jupiter and the Gliese 229 brown dwarf are approximately the same size. However, the brown dwarf has about 50 times Jupiter's mass and is therefore much denser and warmer.
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Light of wavelength 687 nm is incident on a single slit 0.75 mm wide. At what distance from the slit should a screen be placed if the second dark fringe in the diffraction pattern is to be 1.7 mm from the center of the diffraction pattern?
A) 1.1 m B) 1.9 m C) 0.93 m D) 0.47 m E) 0.39 m
Fiber optic cable is in the form of a cylinder of fiber with index of refraction 1.67 and cladding around the outside of index of refraction 1.45. Light is shown on the end of the fiber at an angle of 
relative to the fiber’s axis. What is the maximum angle with respect to the axis that light can be incident upon the fiber’s end and be fully transmitted along the fiber thanks to total internal reflection at the fiber/cladding interface?
A. 
B. 
C. 
D. 
E. 
F. 
Gasoline is useful in cars because it has
A) chemical potential energy. B) electrical potential energy. C) kinetic energy. D) gravitational potential energy. E) radiative energy.
When there is a 14.0-A current through an 8.00-? device for 24.0 hours, how much does this cost if energy costs $0.0900 per kW ? h?
A) $0.24 B) $1.04 C) $2.16 D) $3.39