Answer:
The relative density of the second liquid is 7.
Explanation:
From archimede's principle we know that the force that a liquid exerts on a object equals to the weight of the liquid that the object displaces.
Let us assume that the volume of the object is 'V'
Thus for the liquid in which the block is completely submerged
The buoyant force should be equal to weight of liquid
Mathematically
Thus for the liquid in which the block is 1/7 submerged
The buoyant force should be equal to weight of liquid
Mathematically
Comparing equation 'i' and 'ii' we see that
Since the first liquid is water thus 
Thus the relative density of the second liquid is 7.
Answer: Voltage
Voltage
is the measure of force or potential energy that required moving a unit charge
from one location to another through a conductor. This potential energy is
stored in the form of an electric charge imbalance and capable of provoking
electrons to flow in material through which charges can easily flow.
The displacement, time, and direction
ANSWER:
Angular displacement is analogous to distance.
Angular velocity is analogous to velocity.
EXPLANATION:
FOR ANGULAR DISPLACEMENT AND DISTANCE
Angular displacement = theta
theta = s/r
s = linear dispalcement/distance
r= radius.
so ,
linear displacement/distance s = theta * r.
FOR ANGULAR VELOCITY AND VELOCITY
Angular velocity = w
w = v/r
v = velocity
r = radius
so,
velocity v = w * r.
