Read each statement below carefully and state, with reasons and examples, if it is true or false:

Monjur Alahi

Read each statement below carefully and state, with reasons and examples, if it is true or false:
A scalar quantity is one that
(a) is conserved in a process
(b) can never take negative values
(c) must be dimensionless
(d) does not vary from one point to another in space
(e) has the same value for observers with different orientations of axes


0 like 0 dislike
2 views
Share with your friends

2 Answers

Salim Ahmed Kawsar

Call

(a) False
Despite being a scalar quantity, energy is not conserved in inelastic collisions.
(b) False
Despite being a scalar quantity, temperature can take negative values.
(c) False
Total path length is a scalar quantity. Yet it has the dimension of length.
(d) False
A scalar quantity such as gravitational potential can vary from one point to another in space.
(e) True
The value of a scalar does not vary for observers with different orientations of axes.

0 like 0 dislike
2 views
Talk Doctor Online in Bissoy App
Salim Ahmed Kawsar

Call

a) False 

Despite being a scalar quantity, energy is not conserved in inelastic collisions.

b) False 

Despite being a scalar quantity, temperature can take negative values.

c) False 

Total path length is a scalar quantity. Yet it has the dimension of length.

d) False 

A scalar quantity such as gravitational potential can vary from one point to another in space

e) True 

The value of a scalar does not vary for observers with different orientations of axes.

0 like 0 dislike
2 views
Talk Doctor Online in Bissoy App
Monika read a 210 page book in 7 days . She read the same number of pages each day . How many pages did she read each day ?

Solution: Number of pages read by Monika in one day = 210/7 = 30 So, she read 30 pages each day

1 Answers 1 views
Write true or false. If false change the statement so that it is true.

(a) True (b) False (c) True (d) False (e) True

1 Answers 1 views
Identify True/False statements. Correct each false statement to make it true.

(a) Androgens are produced by Sertoli cells. (False) Androgens are produced by Leydig cells found in seminiferous tubules of the testis. (b) Spermatozoa get nutrition from Sertoli cells. (True) (c) Leydig cells are...

1 Answers 1 views
State whether the given statement is true or false. If true, write the reasons. Ganga–Brahmaputra plain of India is an overpopulated region.

Ganga–Brahmaputra plain of India is an overpopulated region. Answer: This is a true statement. The Ganga-Brahmaputra plain has even topography and highly fertile soil. Hence, it can support a huge population. Water availability...

1 Answers 1 views
State whether the following statements are true or false. In case a statement is false, write the corrected statement in your notebook.

(a) Cutting a log of wood into pieces is a chemical change. (False) (b) Formation of manure from leaves is a physical change. (False) (c) Iron pipes coated with zinc do not...

1 Answers 1 views
State whether each of the following statement are true or false. If the statement is false, rewrite the given statement correctly.

(i) False If P = {m, n} and Q = {n, m}, then P × Q = {(m, m), (m, n), (n, m), (n, n)} (ii) True (iii) True

1 Answers 1 views
Read each statement below carefully and state with reasons and examples, if it is true or false;

(a) True (b) False (c) True (d) False Explanation: When an object is thrown vertically up in the air, its speed becomes zero at maximum height. However, it has acceleration equal to the acceleration due...

1 Answers 1 views
Read each statement below carefully and state with reasons, if it is true or false: (a) The magnitude of a vector is always a scalar,

(a) True (b) False (c) False (d) True (e) True Explanation: (a) The magnitude of a vector is a number. Hence, it is a scalar. (b) Each component of a vector is also a vector. (c) Total path...

1 Answers 1 views
Read each statement below carefully and state, with reasons, if it is true or false:

(a) False The net acceleration of a particle in circular motion is not always directed along the radius of the circle toward the centre. It happens only in the case of...

1 Answers 1 views
Read each statement below carefully, and state, with reasons, if it is true or false; During rolling, the force of friction acts in the same direction

False Frictional force acts opposite to the direction of motion of the centre of mass of a body. In the case of rolling, the direction of motion of the centre of...

1 Answers 1 views
X