# Homework Help: AP Physics Free-Response Practice Question

1. Dec 5, 2007

### xpeachpleasurex

A cylindrical tank containing water of density 1000 kg/m^3 is filled to a height of 0.70 m and placed on a stand. A hole of radius 0.0010 m in the bottom of the tank is opened. Water then flows through the hole and through an opening in the stand and is collected in a tray 0.30 m below the hole. At the same time, water is added to the tank at an appropriate rate so that the water level in the tank remains constant.

(a) Calculate the speed at which the water flows out from the hole

(b) Calculate the volume rate at which water flows out from the hole

(c) Calculate the volume of water collected in the tray in t = 2 minutes

(d) Calculate the time it takes for a given droplet of water to fall 0.25 m from the hole

Well...I started with Bernoulli's equation and calculated the height to find out how far it sinks? And then I calculated the displacement? I don't know...

Last edited: Dec 5, 2007
2. Dec 5, 2007

### Gokul43201

Staff Emeritus
Do not crosspost. And please read the forum guidelines.

Which part are you refering to? What height did you calculate? You are already given the height. Please show your calculations explicitly for each part. It's very hard for us to decipher what you've done.

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