Easy the first one message me if you need more help.
C hope that helps have a good night sleep well thanks
<h3>
Answer: (x,y) = (2,7)</h3>
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Explanation:
-x = y-9 turns into x = -y+9 when you multiply both sides by -1
Plug this into the first equation y - 2x = 3 to get the following
y - 2x = 3
y - 2( x ) = 3
y - 2(-y+9) = 3 ... replace x with -y+9
y + 2y - 18 = 3
3y - 18 = 3
3y = 3+18
3y = 21
y = 21/3
y = 7
Which then tells us,
x = -y+9
x = -7+9
x = 2
So x = 2 and y = 7 pair up to get the solution (x,y) = (2,7)
Answer:
a) R = Kr⁴
b) R = (500/256) r⁴ = (125/64) r⁴ = 1.953125 r⁴
c) R = 1220.7 cm³/s
Step-by-step explanation:
Poiseuille's Law gives the rate of flow, R, of a gas through a cylindrical pipe in terms of the radius of the pipe, r, for a fixed drop in pressure between the two ends of the pipe.
a) R ∝ r⁴
R = Kr⁴
Note that all the other parameters that are constant like the fixed pressure drop between the ends of the pipe are all represented by the constant of proportionality, K.
b) If R= 500 cm^3/sec in a pipe of radius 4 cm for a certain gas, find a formula for the rate of flow of that gas through a pipe of radius r cm. Enter the exact answer.
R = Kr⁴
R = 500 cm³/s
r = 4 cm
500 = K × 4⁴
K = (500/256)
K = 1.953125
R = Kr⁴ becomes
R = 1.953125 r⁴
c) The rate of flow of the gas in part (b) through a pipe with a 5 cm radius.
R = 1.953125 r⁴
r = 5 cm
R = 1.953125 (5⁴)
R = 1,220.703125 = 1220.7 cm³/s
Hope this Helps!!!
1 kilometer = 1000 meters
5000 meters / 1000 = 5 kilometers
5 kilometers x 2 times per day = 10 kilometers per day.
answer: D) 10 kilometers
