Answer:
-3367 1/9
Step-by-step explanation:
This is what calculators are for.
Perform the multiplication and division before the addition.
... = 10000/-9 -2256
... = -1111 1/9 -2256
... = -3367 1/9
_____
If you don't have a calculator, the Google and Bing search boxes can be relied upon to use the correct order of operations.
The complete question is;
A marine biologist is preparing a deep-sea submersible for a dive. The sub stores breathing air under high pressure in a spherical air tank that measures 78.0 cm wide. The biologist estimates she will need 2600 L of air for the dive. Calculate the pressure to which this volume of air must be compressed in order to fit in to the air tank. Write you answer in atmospheres
Answer:
10.5 atm
Step-by-step explanation:
Formula for Volume of a sphere is;
V = (4/3)πr³
r = 78/2 = 39 cm
V = (4/3)π(39)³
V = (4/3)*π*59319
V = 248475 cm³
Now, from conversions, 1000 cm³ = 1L
So,
V = 248475/1000
V = 248.5 L
This is the volume of the storage tank
If we assume that the 2600 L of air is measured at 1 atmosphere pressure, then we will obtain the following relationship:
From Boyles law,
P1 × V1 = P2 × V2
Thus;
(1 atm) × (2600 L) = (P2) × (248.5 L)
P2 = 2600/248.5
P2 = 10.463 atmospheres
Approximating to 3 significant figures is; P2 = 10.5 atm
Answer:
The distributive property of multiplication over addition: Multiplying a sum by a number is the same as multiplying each addend by the number and then adding the products. ... The distributive property of multiplication over subtraction.
Step-by-step explanation:
For this case we have that by definition the mass is given by:
Where,
- <em>D: density
</em>
- <em>V: Volume
</em>
The volume of a pyramid is given by:
Where,
- <em>A: area of the base
</em>
- <em>h: height
</em>
Substituting values we have:
We now calculate the mass:
Answer:
he needs 7.74 pounds of zinc
