Describe the ways in which Pluto is different from the terrestrial and jovian planets in the solar system
What will be an ideal response?
Pluto is predominantly composed of ice and rock, unlike the terrestrial planets which have little ice and the jovian planets which have (proportionally) little rock. Further, its orbit has a much higher eccentricity and inclination than the terrestrial and jovian planets which orbit close to the ecliptic plane. Finally, there are many objects known, most smaller but at least one larger, than Pluto with similar compositions and similar orbits whereas the other planets have no other comparable companions in similar orbits.
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In powder fabrication of metals and ceramics, when the pressed powder part is sintered, the powder particles bond to each other, and voids are reduced by the ___________of atoms.
Fill in the blank(s) with the appropriate word(s).
The sun has a radius of 7 × 108 m and approximates a blackbody with a surface temperature of about 5800 K. Calculate the total rate of radiation from the sun and the emitted radiation flux per square meter of surface area.
GIVEN • The sun approximates a blackbody • Surface temperature (Ts) = 5800 K • Radius (r) = 7 × 108 m FIND (a) The total rate of radiation from the sun (qr) (b) The radiation flux per square meter of surface area (qr/A) PROPERTIES AND CONSTANTS he Stefan-Boltzmann constant (?) = 5.67 × 10–8 W/(m2 K4)
A drawing is placed 40 cm in front of a thin lens. If a virtual image forms at a distance of 50 cm from the lens, on the same side as the drawing, what is the focal length of the lens?
A) -45 cm B) 75 cm C) 90 cm D) 200 cm
Why do you have to take separate measurements for the individual currents through resistors in Procedures 5 and 6?