Answer:
Radio waves are a type of electromagnetic radiation best-known for their use in communication technologies, such as television, mobile phones and radios.
A because if you multiple it, you will be moving the decimal one time
The last one should be right
Answer:
Pure substances are Broken down into other elements or compounds, while Mixtures are combined elements that can be broken down again into their original components.
Explanation:
Mixtures can vary with what they are made from, while pure substances are set as a certain composition already.
Answer:
b) it gets accumulated in the respiratory system which then halts or slows down the supply of oxygen to the brain hence leading to death
