A garden hose has a radius of 0.0120 m, and water initially comes out at a speed of 2.88m/s. Dasha puts her thumb over the end , which cuts its area to 1.05×10^-4 m^2.what is the new velocity of the water coming out ?

v = 12.4 [m/s]

Explanation:

With the speed and Area information, we can determine the volumetric flow.

where:

r = radius = 0.0120 [m]

v = 2.88 [m/s]

Therefore the flow is:

Despite the fact that you cover the inlet with the finger, the volumetric flow rate is the same.

= initial pressure

= final pressure = 2

= initial volume

= final volume = /4

= initial temperature = 20 c = 20 + 273 = 293 k

= final temperature = ?

using the equation