Question

❤happy friendship day❤

pls answer all these questions. ​

Answer 1

Solution :-

Question 7.

Given :-

Measurement Value of A = A ± ∆A

Measurements Value of B = B ± ∆B

Now sum of measurements :-

Z = Z ± ∆Z

Where

Z = A + B

and

∆Z = ( ∆A + ∆B )

So Sum of measurements

= A + B ±(∆A + ∆B)

So Option (a) and (d) satisfies the above's expression.

Question 8.

Given

$Q \propto \dfrac{A (\theta_1 - theta_2)}{l}.t$

Or

$Q = K \dfrac{A (\theta_1 - theta_2)}{l}.t$

or

$K = \dfrac{l \times Q}{A (\theta_1 - theta_2) \times t }$

Where

Q = Energy = Mass × Acceleration × Displacement

L = Length

A = Area

∅ = Temperature

t = Time

So dimension formula

$K = (L)(ML^2T^{-2})(L^{-2})(K^{-1})(T^{-1})$

$K = MLT^{-3}K^{-1}$

→ Option (c)

Question 9

Statement (i) → In Cartesian coordinate system axis are drawn Perpendicular to each other.

Statement (iii) → Both Earth and Sun should be considered as point mass

→ Option (c)

Question 10.

Answer in attachment

→ Option (d)

Question 11.

All the statements are correct .

→ Option ( d)