Answer;
-B3
Explanation;
Refrigerants are divided into two groups according to toxicity:
-Class A signifies refrigerants for which toxicity has not been identified at concentrations less than or equal to 400 ppm; and
-Class B signifies refrigerants for which there is evidence of toxicity at concentrations below 400 ppm.
They are also divided into three groups according to flammability:
-Class 1 indicates refrigerants that do not show flame propagation when tested in air at 21°C and 101 kPa;
-Class 2 indicates refrigerants having a lower flammability limit of more than 0.10 kg/m3 at 21°C and 101 kPa and a heat of combustion of less than 19 kJ/kg;
-Class 3 indicates refrigerants that are highly flammable as defined by a lower flammability limit of less than or equal to 0.10 kg/m3 at 21°C and 101 kPa or a heat of combustion greater than or equal to 19 kJ/kg.
-Therefore; the answer for the above question would be Class B and class 3.
Answer:
The cells are square
Explanation:
because they look more on the outside and I would expect them to be smaller
Make sure this is my opinion, I hope it is true
Answer:
Lipids
Explanation:
Fats are in the class of organic compounds known as lipids. Lipids are organic molecules that can store energy as fat.
If biodiversity is lost in an ecosystem, it will lead to decrease in ecosystem resilience. Biodiversity loss is a major concern now. With the extinction of many species, ecosystem might collapse. Removing a single species can result in a partial collapse of the ecosystem. For example: honey bee colony collapse situation. Without honey bees, humans would struggle or fail to grow certain important crops. With more loss of biodiversity it may become hard for our very survival also.
Answer:
I think the answer is A) biological species concept
