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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
Hard
Views

Views: 5,870

Water flows through the tube shown in figure The areas of cross section of the wide and the narrow portions of the tube are and respectively. The rate of flow of water through the tube is .Find the difference of mercury levels in the U-tube.
Topic

Topic:

Mechanical Properties of Fluids

Book

Book:

Concepts of Physics (HC Verma Part I)

View 6 solutions

Question 2
Medium
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Views: 5,614

An ornament weighing 36 g in air, weighs only 34 g in water. Assuming that some copper is mixed with gold to prepare the ornament, find the amount of copper in it. Specific gravity of gold is 19.3 and that of copper is 8.9.
Topic

Topic:

Mechanical Properties of Fluids

Book

Book:

Concepts of Physics (HC Verma Part I)

View 6 solutions

Question 3
Easy
Views

Views: 5,841

In a streamline flow,
  1. the speed of a particle always remains same
  2. the velocity of a particle always remains same
  3. the kinetic energies of all the particles arriving at a given point are the same
  4. the momenta of all the particles arriving at a given point are the same
Topic

Topic:

Mechanical Properties of Fluids

Book

Book:

Concepts of Physics (HC Verma Part I)

View 5 solutions

Question 4
Hard
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Views: 6,082

At Deoprayag (Garhwal) river Alaknanda mixes with the river Bhagirathi and becomes river Ganga. Suppose Alaknanda has a width of , Bhagirathi has a width of and Ganga has a width of . Assume that the depth of water is same in the three rivers. Let the average speed of water in Alaknanda be and in Bhagirathi be . Find the average speed of water in the river Ganga.
Topic

Topic:

Mechanical Properties of Fluids

Book

Book:

Concepts of Physics (HC Verma Part I)

View 2 solutions

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Practice more questions from Mechanical Properties of Fluids

Question 1
Medium
Views

Views: 5,911

A jewellery piece weighs in air and when dipped in water. Assuming that copper is mixed with gold , find the mass of copper in the jewellery piece.
Topic

Topic:

Mechanical Properties of Fluids

Book

Book:

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

View solution

Question 2
Medium
Views

Views: 5,859

Water is flowing in streamline motion through a tube with its axis horizontal. Consider two points and in the tube at the same horizontal level :
  1. the pressure at and are equal for any shape of the tube
  2. the pressure can never be equal
  3. the pressures are equal if the tube has a uniform crosssection
  4. the pressure may be equal even if the tube has a nonuniform cross-section
Topic

Topic:

Mechanical Properties of Fluids

Book

Book:

Physics Galaxy Mechanics Vol 1 (Ashish Arora)

View 3 solutions

Question 3
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Views: 5,737

A capillary tube of radius is immersed vertically in a liquid such that liquid rises in it to height (less than the length of the tube). Mass of liquid in the capillary tube is . If radius of the capillary tube is increased by , then mass of liquid that will rise in the tube, is
Topic

Topic:

Mechanical Properties of Fluids

View 3 solutions

Question 4
Easy
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Views: 6,072

An ice block contains a glass ball when the ice melts within the water containing vessel, the level of water:
  1. Rises
  2. Falls
  3. Unchanged
  4. First rises and then falls
Topic

Topic:

Mechanical Properties of Fluids

Book

Book:

Fundamentals of Physics, Extended

View 10 solutions

Practice questions on similar concepts asked by Filo students

Question 1
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Views: 5,390

The crest of a Parasaurolophus dinosaur skull is shaped somewhat like a trombone and contains a nasal passage in the form of a long, bent tube open at both ends. The dinosaur may have used the passage to product sound by setting up the fundamental mode in it. (a) If the nasal passage in a certain Parasaurolophus fossil is 2.0 m long, what frequency would have been produced? (b) If that dinosaur could be recreated (as in Jurassic Park ), would a person with a hearing range of 60 Hz to 20 kHz be able to hear that fundamental mode and. if so. would the sound be high or low frequency? Fossil skulls that contain shorter nasal passages are thought to be those of the female Parasaurolophus . (c) Would that make the female's fundamental frequency higher or lower than the male’s?
Topic

Topic:

Physics

View solution

Question 2
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Views: 5,255

Consider a block of mass is fastention D parameters if block is pulled a distance of a spring having spring constant of . Find out the following [5] from rest at .
  1. The angular frequency, the frequency and the period of the resulting motion.
  2. The amplitude of the oscillation.
  3. The maximum speed of the oscillating block.
  4. The maximum acceleration of the block.
Topic

Topic:

Kinematics and Laws of Motion

View solution

Question 3
Views

Views: 5,956

A body oscillates with SHM according to the equation . At time , its displacement, speed and acceleration respectively is :
Topic

Topic:

Waves and SHM

View solution

Question 4
Views

Views: 5,302

 above straight upwards. The car is moving on the horizontal road with an acceleration of and the projection velocity 42. A staircase contains three steps each high and wide (figure 3-E9). What should be the minimum horizontal velocity of a ball rolling off the uppermost plane so as to hit directly the lowest plane?
Topic

Topic:

Magnetism, EMI and AC

View 4 solutions

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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