Answer:
True
Explanation:
True definition of a mixture itself
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. 

Answer:
The blue car left paint on the red car
Explanation:
The designed world is changed regularly by inovations and new technology.
Hope I could help.
When a solid turns into a liquid
Example: Ice cube melts into water