Answer:
The answer is a drain
The final velocity of the 1.4 kg ball is 11.0 m/s to the right
Explanation:
We can solve this problem, by using the law of conservation of momentum: in fact, the total momentum of the two balls must be conserved before and after the collision. Therefore, we can write:
where:
is the mass of the first ball
is the initial velocity of the first ball (taking right as positive direction)
is the final velocity of the first ball
is the mass of the second ball
is the initial velocity of the second ball (it is at rest)
is the final velocity of the second ball
And solving the equation for v2, we find:
So, the 1.4 kg ball moves at 11.0 m/s to the right.
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Answer:
The number of red blood cells is approximately 660 times greater than white blood cells (option A).
Explanation:
In adult humans the blood has about 4,5 to 6 million red blood cells per cubic millimeter (mm3), while the normal value of white blood cells is between 5,000 and 10,000 per mm3.
In this exercise, the given values are
To know how many times there are more red blood cells than white blood cells in this sample, only have to divide the amount of the former between the second:
2.600.000 / 3.920 = 663,27 ≈ 660
For given cell values, the number of red blood cells is about 600 times greater than white blood cells.
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Answer:
A. 660is the answer
Explanation: