What is the speed of the water in the Bernoulli River?

[Beastegargoyl]

Homework Statement

River Pascal with a volume flow rate of 4.7×105 joins with River Archimedes, which carries 1.1×106 , to form the Bernoulli River. The Bernoulli River is 130 wide and 30 deep.

What is the speed of the water in the Bernoulli River?

Homework Equations

Express your answer using two significant figures.

The Attempt at a Solution

I attempted to guesses so far.
0.120 m/s was wrong
1.20 m/s was wrong



Thanks for all the help.
Jared

 

[tiny-tim]

Welcome to PF!

Hi Jared! Welcome to PF!

(try using the X² tag just above the Reply box )

River Pascal with a volume flow rate of 4.7×105 joins with River Archimedes, which carries 1.1×106 , to form the Bernoulli River. The Bernoulli River is 130 wide and 30 deep.

What is the speed of the water in the Bernoulli River?
…
I attempted to guesses so far.
0.120 m/s was wrong
1.20 m/s was wrong

Show us your full calculations, and then we can see what went wrong, and we'll know to help!

 

[Beastegargoyl]

For vfr=4.7*10⁵L/s

I used the equation 4.7*10⁵/3900 equals 1.2m/s

Thanks for the help.
Jared

 

[tiny-tim]

Hi Jared!

(just got up :zzz: …)

River Pascal with a volume flow rate of 4.7×105 joins with River Archimedes, which carries 1.1×106 , to form the Bernoulli River. The Bernoulli River is 130 wide and 30 deep.

What is the speed of the water in the Bernoulli River?

For vfr=4.7*10⁵L/s

I used the equation 4.7*10⁵/3900 equals 1.2m/s

oh i see … you only used the volume flow rate of River Pascal.

The Bernoulli River contains the water of both River Pascal and River Archimedes.

 

[Beastegargoyl]

@tiny-tim- Did you come up with an answer of .40m/s where that incportates both rivers?

Thanks for your help,

Jared

 

[tiny-tim]

@tiny-tim- Did you come up with an answer of .40m/s where that incportates both rivers?

I go 4.0 times something …

what are the units of the problem?

 

[Beastegargoyl]

4.7*10⁵L/s and 1.1*10⁶L/s. 130m wide and 30m deep.

The answer needs to be expressed in m/s.

 

[tiny-tim]

4.7*10⁵L/s and 1.1*10⁶L/s. 130m wide and 30m deep.

The answer needs to be expressed in m/s.

oh, litres!

ok, then i make it .40m/s