Which on the following is used to kill bugs on crops 1. herbicides
2. pesticides
3.ozone
4. chlorine

A__ is two or more substances that are together in the same place but are not chemically combined

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

Explain that newton first law, second law and third law of motion?