It requires 3480 J to move a 675 N object how far?
1 answer:
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Complete Question
If you are lying down and stand up quickly, you can get dizzy or feel faint. This is because the blood vessels don’t have time to expand to compensate for the blood pressure drop. If your brain is 0.4 m higher than your heart when you are standing, how much lower is your blood pressure at your brain than it is at your heart? The density of blood plasma is about 1025 kg/m3 and a typical maximum (systolic) pressure of the blood at the heart is 120 mm of Hg (= 0.16 atm = 16 kP = 1.6 × 104 N/m2).
Answer:
The pressure at the brain is
Explanation:
Generally is mathematically denoted as
Substituting for
(the density) ,
for g (acceleration due to gravity) , 0.4m for h (the height )
We have that the pressure difference between the heart and the brain is
But the pressure of blood at the heart is given as
Now the pressure at the brain is mathematically evaluated as
Answer:
The magnitude of the electric field is in the r direction.
Explanation:
The equation of the electric field is given by:
Where:
- k is the Coulomb constant is
- q is the charge
- r is the distance from A to q
Therefore, the magnitude of the electric field is in the r direction.
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