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A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of m = 0.700fg (where a femtogram, fg, is 10?15g) and is swimming at a velocity of v = 2.00?m/s , with an uncertainty in the velocity of 8.00 % . E. coli bacterial cells are around 1 ?m ( 10?6 m) in length. The student is supposed to observe the bacterium and make a drawing. However, the student, having just learned about the Heisenberg uncertainty principle in physics class, complains that she cannot make the drawing. She claims that the uncertainty of the bacterium's position is greater than the microscope's viewing field, and the bacterium is thus impossible to locate.
What is the uncertainty of the position of the bacterium?
Calculate the energy per photon of electromagnetic radiation, for a photon having a frequency of 5.16 X 10^19 Hz (h = 6.626x10^-34 J s):
A stream of humid air containing 1.00 mole% H2O(v) and the balance dry air is to be humidified to a water content of 10.0 mole% H2O. For this purpose, liquid water is fed through a flow meter and evaporated into the air stream. The flow meter, R, ..
Determine the enthalpy for the given reaction as CS2
Dental X-Rays expose patients ot about 5.0uSv of radiation. Given an RBE of 1 for X-Rays, how many micrograys of radiaion
A sample of urea contains 1.009 g N, 0.145 g H, 0.432 g C, and 0.576 g O. What is the empirical formula of urea?
If 37.0 grams of hydrogen sulfide gas (H2S; MM = 34.08 g/mol) react with 37.1 grams of oxygen gas (O2, MM = 32.00 g/mol), what is the mass of sulfur dioxide (SO2, MM = 64.06 g/mol) gas produced?
Using this equation, how many moles of water are produced when .875 moles of methane burn?
If a car has an EPA mileage rating of 30 miles per gallon, What is this rating in km L-1? 1 liter = 1 dm3, 1 gallon = 3.785 liter, 1 mile = 1.609 km.
Explain why the in phase vibration is located at a higher frequence than the out of phase stretch in the case of acetylene.
Specificy which ion you would add to the unkown and how the results would identify which compound is in the unknown.
Consider the following unbalanced reduction half equation. MnO4-+H=+e- > Mn2++H2O. How many H= are needed for the balanced half-equation.
A sample of ethanol (C2H5OH) has a mass of 43.8 g.(a) How many carbon atoms does the sample contain?
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