If E(X) = 5, V(X) = 3 and Y = 5 - X/3 - X, what is mean of Y?
In: Math
A battery can provide a current of 3.4 A at 2.2 V for 1.5 hr. How much energy (in kj) is produced?
In: Chemistry
What is the % concentration (m/v) of a solution prepared by dissolving 10.0g of NaOH in enough water to make 225mL of solution?
In: Chemistry
A communication satellite is in circular orbit of a radius 2 DU.find minimum delta-v required to double the altitude of satellite.
In: Mechanical Engineering
Please explain how you design the experiment to predict the spoilage microorganism that affected on the Shelf-life of meat balls from primary model to validation. The factors are the storage temperature, water activity, pH
In: Biology
Would a change in temperature during a calibration of volumetric glassware experiment (involving a buret and pipet) impact accuracy, precision or both? Explain. What would be the difference if a graduated cylinder was used instead? Explain.
In: Chemistry
Consider a random experiment of rolling 2 dice. What is
probability of rolling a sum larger than 9? Select the best answer.
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In: Statistics and Probability
Experiment: Purification of Organic Compounds by Simple Distillation - using a mixture of aqueous ethanol.
Q:Would the total volume of the fractions add up to 80ml (the initial volume) ? Explain why based on your results.
In: Chemistry
Power calculation for hypothesis testing are relatively easy to do with modern statistical software. What do you think adequate power should be for an experiment? What issues need to be considered in answering the question?
In: Statistics and Probability
1)
Write a brief introduction on the theory behind IR spectroscopy and gas chromatography. Explain what each instrumentation technique is doing and how it works. Also address the
purpose of each part of the experiment.
In: Chemistry