Answer:
3km due West
Explanation:
Displacement is the distance traveled in a specific direction. From this definition, we can see that displacement is a vector quantity that has magnitude and direction.
So;
For the first day, the person walks 4km East:
4km
Start ----------------------------→ first day
7km
← ------------------------------------------------------ Second day
The displacement of the boy = 7km - 4km = 3km due West
Answer:
Explanation:
Given
mass of ice
Final temperature of liquid
Specific heat of water
Latent heat of fusion
Latent heat of vaporization
Suppose M is the mass of steam at
Heat required to melt ice and convert it to water at
Heat released by steam
and must be equal as the heat gained by ice is equal to Heat released by steam
Answer:
The answer to your question is the Photoelectric effect.
Explanation:
Answer:
Kinetic energy of bigger rock will be more than that of smaller one.
Explanation:
Kinetic energy of the rock is given by,
Kinetic energy =
As velocity of both the rocks are same. Thus, kinetic energy is directly proportional to the mass of the rock
Kinetic energy ∝ mass
So, For greater mass kinetic energy will be greater and for smaller mass kinetic energy will be smaller.
Hence, Kinetic energy of bigger rock will be more than that of smaller one.