Class 9 CBSE
1) A meteorite burns before entering the earth' s atmosphere. What will happen to the momentum ?
2) A device turning mechanical energy into electric energy.
2007-02-26 04:54:19 · 6 answers · asked by chhavi k 1 in Science & Mathematics ➔ Physics
1) The momentum will decrease. The velocity will slightly decrease from friction, but most of the momentum will decrease as the mass of the meteorite decreases. Keep in mind, though, that the meteorite will be traveling at incredibly high speeds, making any decrease in momentum negligible.
2) Hydroelectric dams. Water flow turns turbines, which generates electricity by converting mechanical energy into electric energy.
2007-02-26 05:12:10 · answer #1 · answered by wheresdean 4 · 0⤊ 0⤋
1 Because momentum is conserved and = mv, the velocity increases as the mass of the meteorite is being reduced. THE MOMENTUM of the meteorite DOESNT CHANGE DUE TO THE CONSERVATION OF MOMENTUM
2 A dynamo
PS how does a meterorite burn without entering earth's atmosphere?!? Ask your teacher that, eh?
2007-02-26 23:43:54 · answer #2 · answered by Fenglei S 2 · 0⤊ 0⤋
1. Conservation of linear momentum, you can't convert momentum to something else, so the earth ends up having that momentum added to it.
2. Dynamo, generator, alternator or even a piezo electric crystal.
2007-02-26 13:06:52 · answer #3 · answered by Chris H 6 · 0⤊ 0⤋
1)Momentum = mass X velocity.
All the mass would be converted to energy. therefore there would be no mass i.e. zero.
Therefore momentum of a meteorite after being burnt is zero.
2) Dynamo.
2007-02-26 13:01:24 · answer #4 · answered by Anonymous · 0⤊ 1⤋
**** u must suck
second one is generator or dynameo and and i didn't get the first question....... Meteorites are small tham meteors so it easily burns . but metoers get much more time to get headed its whole body... so it partially burns
2007-02-26 13:26:21 · answer #5 · answered by Anonymous · 0⤊ 0⤋
i agree with chris
2007-02-26 14:55:34 · answer #6 · answered by Anonymous · 0⤊ 0⤋