why can’t a precision balance be used to calibrate the adjustable pipettes. What will happen if...
Homework Answers
Adjustable pipettes are calibrated according to their precision up to the capacity it is meant for (for example, 10 ul pipette, 25 ul pipette, etc.). Hence, a precision balance can't be used to calibrate the adjustable pipettes.
If you want to weigh water on a precision balance, you need a secondary container for holding liquids like water. Since you want to weight a micro amount of water, such as 2.5 ul, the balanced will show too much error (fluctuate too much) so that you can't guarantee the weight you have measured.
Hence, you need to use micropipettes, that too with suitable capacity to measure a certain micro quantity of liquids.
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why can’t a precision balance be used to calibrate the
adjustable pipettes. What will happen if...
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Why does the bootstrap method require sampling with replacement? What would happen if bootstrap resampling was...
Why
does the bootstrap method require sampling with replacement? What
would happen if bootstrap resampling was used, but the samples were
without replacement?
Which one of the following is the most important reason to calibrate equipment used for measurements? Select one: a. It will increase the range of the measurement. b. It will decrease the percent error of the measurement c. It will decrease the range of the measurement. d. It will increase the percent error of the measurement. Which of the following types of equipment may need to be calibrated? Select one: a. analytical balances O b. gasoline pumps O c. fitness...
2. Now, consider the smallest single precision floating point number, 21". What wll happen the "gap" at that number if you change the type to double precision? DO NOT discuss the smallest double precision number -just the largest single precision represented as a double type.
I don't know why the last two are
wrong.
To calibrate your calorimeter cup, you first put 47 mL of cold water in the cup, and measure its temperature to be 25.9 °C. You then pour 49 mL of hot water, temperature = 49.9 °C, into the cup and measure the temperature every thirty seconds over a 10 minute period. You extrapolate this "cooling curve" back to the time of addition and find that the "final temperature" after mixing is...
3. Explain why it is necessary to calibrate the spectroscope, and briefly outline the procedure that you will use to do this. An example of a calibration process is the following: Thermocouples can be used to measure temperature when it is not practical to do so with a thermometer. Thermocouples measure temperature in terms of voltage, rather than directly on a temperature scale and therefore need to be calibrated. Comparing the thermocouple output with the reading from a highly accurate...
Why
does the bootstrap method require sampling with replacement? What
would happen if bootstrap resampling was used, but the samples were
without replacement?
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