Flow rate/ Bernoulli's equation

creamypies
Messages
1
Reaction score
0
ap physics student, on this for the first time

The flow rate of water through a garden hose is 60 cm3/s, and the hose and nozzle have cross sectional areas of 5.1 cm2 and 1.6 cm2 respectively.

(a) If the nozzle is held 11 cm above the spigot, what are the flow speeds through the spigot and the nozzle?
spigot
cm/s

nozzle
cm/s

(b) What is the pressure difference between these points? (Consider the water to be an ideal fluid.)
Pa

I think that it is bernoulli's but I could be wrong
 
Physics news on Phys.org
welcome to pf!

hi creamypies! welcome to pf! :smile:

(try using the X2 icon just above the Reply box :wink:)
creamypies said:
I think that it is bernoulli's but I could be wrong

Yup, (a) is geometry, and (b) is https://www.physicsforums.com/library.php?do=view_item&itemid=115" (for which you need the speeds from (a)) …

what do you get? :smile:​
 
Last edited by a moderator:

Thread 'Direction of the magnetic field of an oscillating charge'

Hello everyone, I’m considering a point charge q that oscillates harmonically about the origin along the z-axis, e.g. $$z_{q}(t)= A\sin(wt)$$ In a strongly simplified / quasi-instantaneous approximation I ignore retardation and take the electric field at the position ##r=(x,y,z)## simply to be the “Coulomb field at the charge’s instantaneous position”: $$E(r,t)=\frac{q}{4\pi\varepsilon_{0}}\frac{r-r_{q}(t)}{||r-r_{q}(t)||^{3}}$$ with $$r_{q}(t)=(0,0,z_{q}(t))$$ (I’m aware this isn’t...
View full post »

Thread 'Initial conditions for orbits around a wormhole'

Hi, I had an exam and I completely messed up a problem. Especially one part which was necessary for the rest of the problem. Basically, I have a wormhole metric: $$(ds)^2 = -(dt)^2 + (dr)^2 + (r^2 + b^2)( (d\theta)^2 + sin^2 \theta (d\phi)^2 )$$ Where ##b=1## with an orbit only in the equatorial plane. We also know from the question that the orbit must satisfy this relationship: $$\varepsilon = \frac{1}{2} (\frac{dr}{d\tau})^2 + V_{eff}(r)$$ Ultimately, I was tasked to find the initial...
View full post »

Similar threads

Bernoulli’s Equation and External Forces
Replies
4
Views
2K
I About Bernoulli's equation for fluid flow
Replies
6
Views
2K
Bernoulli equation / fluid flow / finding height
Replies
6
Views
3K
Determining Reverse Mass Flow Rate Formula for Multiple Diameter Tubes
Replies
1
Views
2K
I Exit velocity through a nozzle: Bernoulli vs. Experience
Replies
7
Views
3K
Understanding Bernoulli's Principle
Replies
43
Views
6K
I Bernoulli and Momentum Disconnect?
Replies
4
Views
2K
Rocket thrust equation in under-expanded nozzle
Replies
2
Views
4K
Doublet flow in Fluid Dynamics between two spheres or cylinders
Replies
0
Views
1K
What is the relationship between pressure and flow rate?
Replies
8
Views
4K

Hot Threads

Recent Insights

Back
Top