Answer:
Explanation:
The total momentum of the system must conserve by the law of momentum conservation.
( 1 )
If you consider the shock between the ball and the truck as totally elastic, and also if the truck is much more massive than the ball, you can assume that the truck does not move when the ball hits it.
Then the truck is always at rest
Hence, you have in the expression ( 1 ):
Explanation:
Simply, shake the boxes. The box that is difficult to shake will be the sand and the box that will be easier will be the feathers.
Upstream speed = S - 1
Downstream speed = S + 1
Average speed = total distance / total time
Average speed = (S - 1) + (S + 1) / 2
= S
S = 6 miles / 4 hours
S = 1.5 miles per hour
Option B
Electrons has a negative charge
<u>Explanation:</u>
Electrons are the negatively charged shreds of an atom. Collectively, the positive charge of the protons in the atomic nucleus are neutralized by each of the electrons of an atom engenders a negative charge. Electrons are notably meager associated with all of the distinct components of the atom.
Electrons enclose the nucleus. Because electrons travel so speedily, it is improbable to discern where they are at a distinct instant in time. Electrons perform a dominant position in whole chemical bonds.
