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Why is it easier to swim in sea water than in fresh water?
Concepts of Physics by H. C. Verma
Concepts of Physics

Class 11

HC Verma Part I

Author:
H. C. Verma
Subject:
Physics
1

Chapter 1: Introduction to Physics

35 questions

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2

Chapter 2: Physics and Mathematics

60 questions

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3

Chapter 3: Rest and Motion: Kinematics

88 questions

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4

Chapter 4: The Forces

33 questions

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5

Chapter 5: Newton's Law of Motion

82 questions

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6

Chapter 6: Friction

57 questions

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7

Chapter 7: Circular Motion

63 questions

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8

Chapter 8: Work and Energy

101 questions

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9

Chapter 9: Centre of Mass, Linear momentum Collision

119 questions

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10

Chapter 10: Rotational Mechanics

149 questions

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11

Chapter 11: Gravitation

80 questions

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12

Chapter 12: Simple Harmonic Motion

111 questions

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13

Chapter 13: Fluid Mechanics

81 questions

Q1
Is Archimedes' principle valid in an elevator accelerating up ? In a car accelerating on a level road?
Q2
Why is it easier to swim in sea water than in fresh water?
Q3
A glass of water has an ice cube floating in water. The water level just touches the rim of the glass. Will the water overflow when the ice melts?
View all question
14

Chapter 14: Some Mechanical Properties of Matter

87 questions

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15

Chapter 15: Wave Motion and Waves on a String

96 questions

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16

Chapter 16: Sound Waves

118 questions

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17

Chapter 17: Light Waves

79 questions

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18

Chapter 18: Geometrical optics

123 questions

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19

Chapter 19: Optical Instruments

52 questions

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20

Chapter 20: Dispersion and Spectra

27 questions

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21

Chapter 21: Speed of Light

14 questions

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22

Chapter 22: Photometry

38 questions

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Question
Easy
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Solving time: 2 mins

Why is it easier to swim in sea water than in fresh water?

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Updated on: Dec 15, 2022

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Book:

Concepts of Physics (HC Verma Part I)

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Text SolutionText solutionverified iconVerified

Whether an object sinks or floats in a liquid depends upon the density of the two. We know that sea water has dissolved salts in it, which increase its density. So, sea water exerts more buoyancy force (in the upward direction) on the swimmer than that exerted by fresh water. This helps the person to swim easily in sea water compared to fresh water.
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Practice questions from Concepts of Physics (HC Verma Part I)

Question 1
Easy
Views

Views: 5,718

A Gipsy car has a canvass top. When the car runs at high speed, the top bulges out. Explain.
Topic

Topic:

Mechanical Properties of Fluids

Book

Book:

Concepts of Physics (HC Verma Part I)

View solution

Question 2
Easy
Views

Views: 5,918

The weight of an empty balloon on a spring balance is . The weight becomes when the balloon is filled with air. Let the weight of the air itself be . Neglect the thickness of the balloon when it is filled with air. Also neglect the difference in the densities of air inside and outside the balloon.
Topic

Topic:

Mechanical Properties of Fluids

Book

Book:

Concepts of Physics (HC Verma Part I)

View 2 solutions

Question 3
Easy
Views

Views: 6,059

In the derivation of , it was assumed that the liquid is incompressible. Why will this equation not be strictly valid for a compressible liquid?
Topic

Topic:

Mechanical Properties of Fluids

Book

Book:

Concepts of Physics (HC Verma Part I)

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Question 4
Hard
Views

Views: 5,883

Water flows through a tube shown in figure The areas of cross section at A and are and . respectively. The height difference between and is . If the speed of water at is , find
(a) the speed at and
(b) the difference in pressures at and .
.
Topic

Topic:

Mechanical Properties of Fluids

Book

Book:

Concepts of Physics (HC Verma Part I)

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Practice more questions from Mechanical Properties of Fluids

Question 1
Easy
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Views: 6,036

The excess pressure due to surface tension in a spherical liquid drop of radius r is directly proportional to:
Topic

Topic:

Mechanical Properties of Fluids

Book

Book:

Fundamentals of Physics, Extended

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Question 2
Easy
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Views: 6,308

A boat carrying a number of large stones is floating in a water tank. What would happen to the water level, if a few stones are unloaded into water?
  1. Rises
  2. Falls
  3. Remains unchanged
  4. Rises till half the number of stones are unloaded and the begins to fall
Topic

Topic:

Mechanical Properties of Fluids

View 5 solutions

Question 3
Hard
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A spring is attached to the bottom of an empty swimming pool, with the axis of the spring oriented vertically. An block of wood is fixed to the top of the spring and compresses it. Then the pool is filled with water, completely covering the block. The spring is now observed to be stretched twice as much as it had been compressed. Determine the percentage of the block's total volume that is hollow. Ignore any air in the hollow space.
Topic

Topic:

Mechanical Properties of Fluids

Book

Book:

Mechanics Volume 2 (DC Pandey)

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Question 4
Medium
Views

Views: 5,226

A long vertical capillary of radius is dipped in a liquid having surface tension . The gauge pressure at the mid-point of the liquid column in the capillary is (take angle of contact )
Topic

Topic:

Mechanical Properties of Fluids

Book

Book:

Physics for JEE Main and Advanced Mechanics 2 (McGraw Hill)

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The motion of a particle is given by (t) = 5t4 -- 4t3 + 6t2 -- 8t + 7, where and t are measured in centimeters and hours respectively Without converting units, find the following dx The velocity =vt= dt Preview d2x The acceleration a(t) dt2 Preview Evaluate these att=3 v(3= (units go in the second box) a(3)= (units go in the second box)
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Question 4
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 The liquid meniscus, in capillary, tube willl be convex, if the angle of contact is If a water drop is kept between two glass plates, then its shape is
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Question Text
Why is it easier to swim in sea water than in fresh water?
Updated OnDec 15, 2022
TopicMechanical Properties of Fluids
SubjectPhysics
ClassClass 11
Answer TypeText solution:1 Video solution: 1
Upvotes173
Avg. Video Duration12 min