Recent content by ahello888a

Venturi meter help! Homework Statement A venturi meter is measuring the flow of water; it has a main diameter of 3.0 cm tapering down to a throat diameter of 1.0 cm. If the pressure difference is measured to be 16 mmHg, what is the speed of the water entering the venturi throat...

okay i just assume the book has rounding mistakes...thanks very much for your abundance of help though!

im getting .613 0.84 is what the book says is the answer.

oh I am sorry. I put in 1m.

is it 86.12HP? I guess I did forget to do that conversion, but is the method correct?

L is the length of the string which I assume to basically be the height since the string goes that length down.

...so i guess its just something that you'd have to know about yo-yos

Heres what I get after simplifying the Kf=Ki v is velocity, d is for the disks, h is for the hub, L is for height/string length v^{2} = \frac{2m_{tot}gL}{m_{tot}+M_{d}\frac{R_{d}}{R_{h}}^{2}+0.5M_{h}} I plugged in the numbers that my book version that the question provides and I still...

is there any reason to use that over the radius of the cylindrical disks?

Inertia for a special yo-yo help! Homework Statement A yo-yo is made of two solid cylindrical disks, each of mass M and diameter D, , joined by a (concentric) thin solid cylindrical hub of mass m and diameter d. Use conservation of energy to calculate the linear speed of the yo-yo just before...

never mind...

power and torque what did i do wrong? Homework Statement A rotating uniform cylindrical platform of mass 230 kg and radius 5.6 m slows down from 3.8 rev/s to rest in 16 s when the driving motor is disconnected. Estimate the power output of the motor (\rm hp) required to maintain a steady...

i still have absolutely no clue how to do this. can you point to an example or something?

Homework Statement Determine the moment of inertia of a 19kg door that is 2.5m high and 1.1m wide and is hinged along long side. Ignore the thickness of the door Homework Equations I=\int (R^2 dm) The Attempt at a Solution I really don't know where to start with this problem. My...

thanks very much!