Water is a compound because it A. cannot be broken down into simpler substances. B. always has two hydrogen atoms for each oxyge
2 answers:
Answer: Option (B) is the correct answer.
Explanation:
A compound is defined as a substance in which two or more different elements in a fixed ratio by mass combine chemically with each other.
For example, chemical formula of water is and it is a compound because here two atoms of hydrogen chemically combine with one atom of oxygen.
And, the ratio of these atoms is 2 : 1. A compound can be broken down into simpler substance by chemical means only.
Whereas an element is a substance that contains only same type of atoms that cannot be broken down into simpler substances.
Thus, we can conclude that water is a compound because it always has two hydrogen atoms for each oxygen atom.
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Answer:
(a). The pressure is 14.76 psi.
(b). The pressure is 15.59 psi.
(c). The pressure is 15.68 psi.
All answer are reasonable.
Explanation:
Given that,
Speed v₁= 60 mph
Speed v₂ = 225 mph
Speed v₃ = 235 mph
(a). We need to calculate the maximum pressure on his hand
Using equation of pressure
there, no vertical movement
So, on neglect of height term
Where, P= atmospheric pressure
= air density
v = speed
Put the value in the equation
(b). Speed v₂ = 225 mph
We need to calculate the maximum pressure on his hand
Using equation of pressure
Put the value in the equation
(c). Speed v₃ = 235 mph
We need to calculate the maximum pressure on his hand
Using equation of pressure
Put the value in the equation
According to bernoulli's equation,
If the car increases the velocity the the pressure on the surface of the driver's hand increases.
The pressure from P₁ to P₃ are all near the value of one atmosphere.
So, the pressure difference of one atmosphere is not enough to break the driver's hand.
Hence, (a). The pressure is 14.76 psi.
(b). The pressure is 15.59 psi.
(c). The pressure is 15.68 psi.
All answer are reasonable.