False! The three states of matter are solid, liquid, and gas. We can not touch gas, so it can not be compressed.
The colloid formed by ice cream remains stable only at cold temperatures. When ice cream is warmed above freezing, its dispersed particles absorb energy and begin to move faster. When the fast-moving particles collide, they sometimes stick together.
solution:
You need to find the frequency, and they have already given you the wavelength. And since you already know the speed of light, you can use formula (2) to answer this problem. Remember to convert the nano meters to meters because the speed of light is in meters. 

The first part is C a substitution and the second part is A i believe, please check with others first
Answer:
The height of the waves vary. The wave height is much larger for the air boat than for the mosquito.
Explanation:
Plato question