Unit 6 Exercise Short Questions | 11th Class | FBISE | NBF Book

In this video, we cover the exercise short questions from Unit 6 of the 11th Class Physics textbook by the National Book Foundation (NBF), as prescribed by the Federal Board (FBISE). This video provides simple, clear, and concise answers to help you understand the key concepts quickly. Whether you are preparing for exams or revising important topics, this video will guide you through each question step-by-step.

Key Points Covered:
Give short answers of the following questions.
(1) Why do athletes such as swimmers and bicyclists wear body suits in competition.
(2) Distinguish between turbulent and streamline flow.
(3) When there is a change in the width of the river. The speed of the water decreases in wider regions whereas the speed of water increases in the narrower regions. Why?.
(4) It is dangerous to stand close to rail tracks when a rapidly moving commuter train passes. Explain why?
(5) Verify that pressure has units of energy per unit volume.
(6) A perfume bottle or atomizer sprays a fluid from inside the bottle when it is pressed. How does the fluid rise up in the vertical tube in the bottle?
(7) If you lower the window on a car while moving, an empty plastic bag can sometimes fly out the window. Why does this happen?
(8) Explain how an upthrust is produced when the aeroplane is running on runway?
(9) Why does a ball placed in a vertical air jet become suspended (as shown in figure)?
(10) Can you increase flow velocity of water in a rubber pipe by squeezing? Explain briefly.
(11) What is meant by superfluid? How is superfluid made?

Explanation of key concepts in Unit 6.
Step-by-step answers to exercise short questions.
Tips and tricks to remember important physics principles.
Clear and concise explanations designed for 11th-grade students.
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[Qasimsatti]

Thank you so much sir you are amazing ❤❤

[BlackShadow-kw]

Dear teacher ...please help us with book chapter ...objectives solution