Physics, 19.11.2019 04:31 mooreadrian412
When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. this explosion blows much or all of a star's mass outward, in the form of a rapidly expanding spherical shell. as a simple model of the supernova process, assume that the star is a solid sphere of radius r that is initially rotating at 2.4 revolutions per day. after the star explodes, find the angular velocity, in revolutions per day, of the expanding supernova shell when its radius is 4.3r. assume that all of the star's original mass is contained in the shell.
Answers: 1
Physics, 21.06.2019 22:50
Acar of mass m goes around a banked curve of radius r with speed v. if the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to 101) a) mv2/r b) mg/2. d) mg e) tan[v2/(eg)]
Answers: 2
Physics, 22.06.2019 02:30
Agas initially at p1 = 1 bar and occupying a volume of 0.5 liter is compressed within a piston–cylinder assembly to a final pressure p2 = 4 bar. (a) if the relationship between pressure and volume during the compression is pv = constant, determine the volume, in liters, at a pressure of 3 bar. (b) repeat for a linear pressure–volume relationship between the same end states. reference
Answers: 1
Physics, 22.06.2019 10:40
Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v
Answers: 1
When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. this ex...
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