Thursday

November 20, 2014

November 20, 2014

Posted by **zoe** on Sunday, December 2, 2012 at 2:38pm.

what do we know to plug in for bernouilli's equation?

- physics (SOS!) -
**Damon**, Sunday, December 2, 2012 at 3:31pm(1/2) rho v^2 + rho g z + p = constant

air pressure p is the same at the surface as when the water exits .05 meters below the surface so comparing conditions at the surface and at the exit:

0 + rho g (.2) + p air = (1/2) rho v^2 + rho g (.15) + p air

or

(1/2) rho v^2 = rho g (.05)

v = sqrt (2 g *.05)

In other words the water speed will be the same as that of an object that is dropped 5 centimeters.

v is our horizontal speed

v = sqrt (2 * 9.81*.05)

= 22 m/s

= 1 m/s

now how long to fall .15 meters?

.15 = (1/2) g t^2

.15 = (.5)(9.81) t^2

t = .175 s

so 1 * .175 = .175 meters from the cylinder

**Answer this Question**

**Related Questions**

physics - 0.140- cube of ice (frozen water) is floating in glycerine. The ...

Physics - Use Bernoulli's equation to determine the velocity with which water ...

Physics - A metal cylinder with a area of 0.01m^2 and height of 0.1m is ...

Physics - A fountain has a cylinder with holes placed on the side at heights of ...

physics - A graduated cylinder is inverted in a very large bucket of water. The ...

physics - A 7.2 cm tall cylinder floats in water with its axis perpendicular to ...

physics - A large storage tank, open to the atmosphere at the top and ﬁ...

physical science - a graduated cylinder is filled with water to a level of 40.0 ...

chemistry help ASAP - a graduated cylinder contains 20.0 ml of water. when 100.g...

Physics - A 50 kg piston with a radius of 50 cm floats on a cylinder that is ...