`0.5`kg of herb seeds will cover an area of `150\ m^{2}.` Determine the mass of seeds, in kg, needed to plant the plot with herbs.

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.