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When you place the sample to be examined at a distance of 1.30 cm from the objective, at what length l will you need to adjust the tube of the microscope in order to view the sample in focus with a
A sample of O2 (g) is collectede over water at 24degrees C. The volume of gas is 1.16L. In asubsequent experiment, it is deterrmined that the mass ofO2 present is 1.46 grams. What mu
What is the total heat evolved when a saturated solution of boricacid in 1000g of water is cooled from 100°C to20°Celsius? (Take the heat capacity of the solution to be thesame as that of wa
Two batteries of emf 6V and internal resistance 1 ohm are connected in parallel. The load that will absorb the greatest power from the combination has resistance of:
What two alcohols would you use if your goal was to synthesize hexyl pentyl ether via acid-catalyzed dehydration of two alcohols?
Find the maximum torque exerted on the coil when the wire is used to make (a) a single-turn square coil and (b) a two-turn square coil.
At what angle will the second intensity maximum occur if the incident radiation has a wavelength of 505. nm?
Two lead strips (anode and cathode) connected to a small battery are placed in a beaker of lead(II)nitrate solution. A thinlayer of substance is formed on the outside of the cathode.
A piece of wire with mass per unit length 68 {\rm g/m} runs horizontally at right angles to a horizontal magnetic field. A 6.4 {\rm A} current in the wire results in its being suspended against grav
A 100-W lightbulb connected to a 120-V source experiences a voltage surge that produces 140-V for a moment. By what percentage does its power output increase? Assume its resistance does not change.
A skier of mass 72 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 70 m up a 30° slope (assumed frictionless) at a constant speed of 2.8 (b) What power m
An 80.0 m long brass rod is struck at one end. A person at the other end hears two sounds as a result of two longitudinal waves, one traveling in the metal rod and the other traveling in the air. Wh
The x, y, and z components of a magnetic field are Bx = 0.10 T, By = 0.14 T, and Bz = 0.17 T. A 25-cm wire is oriented along the z axis and carries a current of 4.1 A. What is the magnitude of the m
Calculate the percent carbon in capsaicin,C18H27NO3, the compound that gives the hot taste to chili peppers ?
A quantum arrow shot from a Zorg Trooper aimed at an Octomorph is traveling at an initial speed of 100 m/s. However, when the arrow is fired, the Octomorph falls out of the tree into the water below
If 930. mL of 0.1063 M aqueous HCl and 0.04800 mol of solid MnS are reacted stoichiometrically according to the equation, what mass (g)of solid MnS remained?
A soldering iron uses an electric current in a wire to heat the tip. A transformer with 100 turns on the secondary coil provides 45 at an rms voltage of 25 . a) What is the resistance of the wire in
When carrying out the acid-base extractions in lab, you notice that you were asked (in the "Hints of Preparation") to extract with sodium bicarbonate only once while the procedure directs you to car
The tension is pulling m1 to the left while the tension acting on m2 is pulling it to the left and right. m3 is hanging from a pulley off the table and above the ground. What would the accelerations
The peak current through an inductor is 13.0 when connected to an AC source with a peak voltage of 0.50 . What is the inductive reactance of the inductor?
In the separation of benzoic acid, 4-tertbutylphenol, and biphenyl, what would occur if sodium hydroxide had been used in the first extraction?
If the indians push with a force of 1,100 N parallel to the plank, what is the horizontal distance from the edge of the plank (d) that each crate hits the water?
A sample of gas as 1/2 atm pressure occupies a volume of 158 ml, if temperature is held constant, what will be the new pressure if the volume is decreased to 123 ml?
While looking though a diffraction grating at a Nitrogen discharge tube, you note that light with a known wavelength of 567.9nm is visible at an angle of 37 degrees from the central antinode. How ma
Ethanolamine, HOC2H4NH2, is aviscous liquid with an ammonia like odor; it is used to remove hydrogen sulfide from natural gas. A 0.15 M aqueous solution of ethanolamine has a pH of 11.34. Wh