Physics, 16.09.2019 09:30 alexis9658
This is a force that acts over a distance, can not be seen, and causes like poles to repel and opposite poles to attract. what is this force?
a)
gravity
b)
friction
c)
magnetism
d)
air resistenace
Answers: 1
Physics, 21.06.2019 15:30
Which would not reduce the amount of green house gasses in the air
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What is the type of the reaction below? bacl2 + h2so4 → 2 hci + baso4 double replacement synthesis single replacement decomposition
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Physics, 21.06.2019 22:50
A23 kg log of wood begins from rest, 300 m up a sluice (a water track used to transport logs, think of it as an inclined plane with negligible friction) inclined at 20° to the horizontal. after it reaches the flat waterway at the bottom it collides elastically with a 100 kg block of wood initially at rest near the base of the incline. (a) how long does it take the 23 kg log to travel down the incline? (b) what is the speed of the 23 kg log at the bottom of the incline? (c) what are the velocities of both blocks of wood after the collision? (d) what is the total kinetic energy before the collision? (e) what is the kinetic energy of the 23 kg log after the collision? (f) what is the kinetic energy of the 100 kg block of wood after the collision? (g) what is the total kinetic energy after the collision? (h) compare the total initial and total final kinetic energies. is this consistent with what you would expect for elastic collisions? explain!
Answers: 1
Physics, 22.06.2019 12:30
Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground.what is his gravitational potential energy above the ground?
Answers: 1
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