Answer:
As the liquid cools down, the amount of potential energy is reduced and the molecules start to move slower. When the water temperature reaches around 0°C, the molecules stick together and form a solid – ice
The "stuff" (molecules) in water is more tightly packed than in ice, so water has greater density than ice. Don't let the fact that ice is a solid fool you! As water freezes it expands. So, ice has more volume (it takes up more space, but has less density) than water
Explanation:
The dots on an hr diagram represent stars.
Answer:
The frequency is f = 6Hz
Explanation:
Given
The time division setting is 
The number of division is 
The total time for 10 division can be mathematically obtained as


From the question the time for 3 cycle is

Then the for one cycle which equivalent to the Period


The frequency is generally given as 
Now substituting values we have

