You are taking a shower in your dormitory when someone flushes a toilet nearby. The pressure in the cold water line drops and you find yourself showering in what feels like molten lava. This loss of cold water pressure occurs when the toilet lets cold water flow through the pipes delivering it to the bathroom and the water's speed in those pipes increases. Assuming all the piping to be about on the same level, the cold water's faster motion in the delivery pipes reduces its pressure in the shower head because faster moving water
A) has less pressure than slower moving water.
B) has less kinetic energy than slower moving water.
C) has less gravitational potential energy than slower moving water.
D) losses more energy to viscous drag as it flows through the delivery pipes.

Question

Quizplus · Accepted Answer

A) The principle that explains this phenomenon is Bernoulli's principle, which states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure or a decrease in the fluid's potential energy. Therefore, when the cold water flows faster to fill the toilet, its pressure in the shower head decreases, making the hot water feel relatively hotter.

You Are Taking a Shower in Your Dormitory When Someone