One stone has a mass of 16 kg and a kinetic energy of 26 J. A second stone has the same mass and nine times the kinetic energy. Compare their speeds. A.
The second stone has 0.33 times the speed of the first.
B.
The second stone has 1.5 times the speed of the first.
C.
The second stone has 3 times the speed of the first.
D.
The second stone has 2/3 times the speed of the first.

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hope this : )

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered