This is true, The total energy when a body falls freely towards earth remains constant.
Answer:
The volume of the lungs at 5m deep is 4L
Explanation:
Hello!
We can solve this problem considering that the air inside de lungs behave as an ideal gas, and that the temperature is the same at sea leavel and 10 m below the surface, in this case:
P1 V1 = P2 V2 -- (1)
wher P and V stands for pressure and volume, and 1 and 2 for the intial (sea level) and final (5m below) states.
We know that:
P1 = 14.7 psi
V1 = 6 L
And if the pressure exerted by the water adds 14.7 psi to atmospheric pressure so 10 m below the surface, then at 5 m below it must add 14.7/2 psi, therefore:
P2 = (14.7/2) psi + atmospheric pressure = 7.35 psi + 14.7 psi
P2 = 22.05 psi
Solving equation (1) for V2:
V2 = V1 (P1/P2) = 6 L (14.7 psi / 22.05 psi ) = 6 *(2/3) = 4 L
The volume of the lungs at 5m deep is 4L
I would choose the vinegar before baking soda because the baking soda is what is making the chemical reaction with the vinegar. Both need eachother but the vinegar is a less powerful reactant than the baking soda.
Answer:
-2
Explanation:
Since its a compound, it's charge is 0.
So, there are 2 Fe and 3 Oxygen,
let x = oxidation number of oxygen
2(+3) + 3x =0
x =-2
Side note : even if the oxidation number is positive, make sure to put the positive sign like how you would in numbers