Answer:
<h3>The answer is 20 mL</h3>
Explanation:
The volume of a substance when given the density and mass can be found by using the formula

From the question
mass = 24 g
density = 1.2 g/mL
We have

We have the final answer as
<h3>20 mL</h3>
Hope this helps you
Answer:

Explanation:
As we know by the formula of diffraction

so we have
a = slit size
= angular position of Nth minimum
so we will have
for first minimum of 630 nm light


Now for another wavelength second minimum is at 60 degree angle



Answer:
<h2>Case i) if

</h2><h2>So initially if the circuit is inductive in nature then its net impedance will decrease after this</h2><h2>Case ii) if

</h2><h2>So initially if the circuit is capacitive in nature then its net impedance will increase after this</h2>
Explanation:
As we know that the impedance of the circuit is given as

when we join another identical capacitor in parallel with previous capacitor in the circuit then we will have for parallel combination

so it is

now we have

Case i) if 
So initially if the circuit is inductive in nature then its net impedance will decrease after this
Case ii) if 
So initially if the circuit is capacitive in nature then its net impedance will increase after this
Answer:
43.2 N
Explanation:
= Wavelength = 0.75 m
f = Frequency = 40 Hz
m = Mass of string = 0.12 kg
L = Length of string = 2.5 m
= Linear density = 
Velocity of wave is given by

The tension in string is given by

The tension in the string is 43.2 N