Question

Question 5 [3+3+4]
(a) Explain how we can drink juice by using straw.
(b) Define Gas pressure. What is lateral pressure ?
(c) How much work is done by electric motor to pump 5000g water to a height of 400cm. Also
calculate the power of the motor if it completes this work in 2hr 20min. Take g = 10m/s2.

Answer 1

Answer:

a: When you drink from a straw, you create a little space of low pressure inside your mouth and in the top of the straw. Then the air outside the straw pushes down on the surface of the drink and forces the liquid up through the straw and into your mouth.

i hope it helps