Physics, 03.01.2020 04:31 lilycastillo15
Ametal ball at 30°c is dropped from a height of 6.2 km. the ball is heated due to the air resistance and it completely melts just before reaching the ground. the molten substance falls slowly on the ground. if the specific heat of lead = 126 jkg−1^o c^{-1} and melting point of lead = 130^oc and suppose that any mechanical energy lost is used to heat the ball, then the latent heat of fusion of lead is:
Answers: 3
Physics, 21.06.2019 13:30
We found the centripetal acceleration of the earth as it revolves around the sun. compute the centripetal acceleration of a point on the surface of the earth at the equator caused by the rotation of the earth about its axis. (enter the magnitude. the radius of the earth is 6,371 km.)
Answers: 2
Physics, 22.06.2019 04:50
Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k
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Physics, 22.06.2019 04:50
Unpolarized light whose intensity is 1.19 w/ is incident on a polarizer. (a) what is the intensity of the light leaving the polarizer? (b) if the analyzer is set at an angle of = 41.0∘ with respect to the polarizer, what is the intensity of the light that reaches the photocell?
Answers: 1
Physics, 22.06.2019 10:00
Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.
Answers: 2
Ametal ball at 30°c is dropped from a height of 6.2 km. the ball is heated due to the air resistance...
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