Question 1
string length and frequency have a(n) relationship.

direct

inverse (indirect)

The correct answer is direct.

Inverse

Explanation:

If l is the length of the string. The frequency of the vibrating string is given by :

..............(1)

Where

T is the tension in the string

is the mass per unit length

It is clear from equation (1) that the frequency of the vibrating string is inversely proportional to the length of the string. So, String length and frequency have an inverse relationship.

cant without the picture! ?

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j