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Why are fermentation tubes evaluated at 24 and 48 hours?
It is important to remember that fermentation can occur with or without the presence of oxygen, and during prolonged incubation periods, many bacteria will begin growing oxidatively on the peptone after exhausting the supplied carbohydrate. This results in neutralization of the indicator, turning it black to red due to the alkaline conditions created by ammonia production. Consequently, fermentation tubes should not be incubated over 48 hours after inoculation for this reason.
Why is it important to use AM and PM when using elapsed time?
It is important because if you didn't, you would be measuring 12 hours instead of the full 24. I think...
If Tanya rides her bike at a speed of 15 mi h how far will she ride in 2 hours?
It is important to know how to calculate the speeds of objects. If a person is riding their bike at 15 miles per hours, they will travel 30 miles in 2 hours.
What is 17 of a fraction of an hour?
A fraction is an unspecified, vague term. The only thing that can be said with some confidence is that is will not exceed an hour. It will probably not exceed half an hour but ... So 17 times an unspecified fraction can be anything. As discussed above, you can almost be certain that it will not exceed 17 hours, and be pretty confident that it will be less than 8.5 hours but beyond that is anyone's guess.
What is 460 miles in hours?
To convert miles to hours, you need to know the speed at which the distance is being covered. If you are traveling at a constant speed of 60 miles per hour, then it would take approximately 7.67 hours to cover 460 miles (460 miles / 60 miles per hour = 7.67 hours). It is important to note that this calculation assumes a constant speed without any stops or delays.
