Which of the following is not a disadvantage of an electromagnetic wave? Gamma rays can cause damage to cells and birth defects.

Overexposure to microwaves can affect parts of the brain.

Exposure to too much infrared light can cause skin cancer.

Excessive exposure to radio waves can cause cancer.

its c its is a mixture of gases

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

i don't understand. explain it clearly