Nitrogen fixation<span>. </span>Nitrogen fixation<span> is a </span>process<span> by which </span>nitrogen<span> in the Earth's atmosphere is converted into ammonia (NH</span>3<span>) or other molecules available to living organisms. Atmospheric </span>nitrogen<span> or molecular dinitrogen (N</span>2<span>) is relatively inert: it does not easily react with other chemicals to form new compounds</span>
I would say
a. biological pest control
biological pest control is when other plants or animals are used to control pests. There are no chemicals used only the natural roles of the environment.
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Answer: heating a tin can of water using a Bunsen burner.
Explanation:
Answer:
The efficiency of the hair dryer is 0.2 or 20%
Explanation:
The efficiency of a machine or any appliance is a measure of the useful work done by the machine when an effort is applied to the machine. The higher the efficiency of a machine, the more useful work the machine does.
Due to the economical and environmental impact of energy production, machines and appliances of high efficiency are being developed and recommended for domestic as well as industrial use nowadays.
In electrical appliances, energy is usually supplied by electrical power units. The higher the efficiency of an electrical appliance, the less power it consumes to do useful work. For a hair dryer which takes in 3000 J of energy per second and transfers 600 J of useful heat energy, its efficiency is calculated with formula below:
efficiency = useful energy / total energy input
Efficiency = 600 J / 3000 J = 0.2
Therefore, the efficiency of the hair dryer is 0.2 or 20%