Physics, 09.10.2019 06:00 bella51032
Bob has a chunk of pure substance that is dull and crumbles when dropped. if he attaches it to an electrical source, what will happen?
a. it will conduct electricity because it is a metal.
b. nothing because it is metal and metals don't conduct electricity.
c. it will conduct electricity because it is a nonmetal.
d. nothing because it is a nonmetal and nonmetals don't conduct electricity.
Answers: 3
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If it takes a planet 2.8 x 10^8 s to orbit a star with a mass of 6.2 x 10^30 kg what is the average distance between the planet and the star
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Physics, 22.06.2019 12:00
The sunโs mass is 2.0ร10^ 30 kg, its radius is 7.0ร10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5ร10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?
Answers: 3
Physics, 22.06.2019 15:50
An object with initial temperature 130 โ f is submerged in large tank of water whose temperature is 50 โ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = โ 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )
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Physics, 22.06.2019 17:00
Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little
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Bob has a chunk of pure substance that is dull and crumbles when dropped. if he attaches it to an el...
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