Arock is dropped from a third story window to the ground below. assuming air resistance can be ignored, as it falls: a) only its kinetic energy is conserved.
b) only its momentum is conserved.
c) both its kinetic energy and its momentum are conserved.
d) only its mechanical energy is conserved.
e) both its mechanical energy and its momentum are conserved.
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Physics, 22.06.2019 00:00
What type of nuclear decay causes the atomic number of an element to increase by 1?
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Physics, 22.06.2019 16:30
Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)
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Physics, 22.06.2019 20:10
Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?
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Physics, 23.06.2019 02:00
How does the strength of the electrostatic force between an electron and a proton compare to the strength of the gravitational force between them?
Answers: 1
Arock is dropped from a third story window to the ground below. assuming air resistance can be ignor...
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