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A small lead ball, attached to a 1.50-m rope, is being whirled in a circle that lies in the vertical plane. The ball is whirled at a constant rate of three revolutions per second and is released on the upward part of the circular motion when it is 0.75 m above the ground. The ball travels straight upward. In the absence of air resistance, to what maximum height above the ground does the ball rise?
At 25 C the density of water is 0.997 g/cm^3, whereas the density of ice at -10 C is 0.917 g/cm^3. if a plastic soft-drink bottle (volume=250mL) is filled with pure water capped and then frozen at -10 C what volume will the soild occupy
What wavelength is expected for light composed of photons produced by an n=3 to n=1 transition in a hydrogen?
Sodium thisulfate, Na2S2O3, is used as a fixer when developing photographic film. What is the mass in grams of Na2S2O3 needed to make 100ml of a 0.25 solution?
In the electrolysis of water, 2h20 yields 2h2 plus o2, if the volume of oxygen produced was 8ml, what would be the volume of hydrogen produced?
Use balanced equations to determine whether either CuBr or Ca3(PO4)2 has a different solubility with a change in pH:
What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency \rm 1.5\times 10^{15}~Hz
Draw and label the flowchart and show the degree of freedom analysis for the overall process, the split point, the treatment unit, and the mix point.
The following reaction was carried out in a 2.50L reaction vessel at 1100 K: C(s)+H2O(g)?CO(g)+H2(g) If during the course of the reaction, the vessel is found to contain 5.25mol of C
A 0.1mL Pure Acid phosphatase (0.5mg/ml) hydrolyzes 0.2mmol of pnPP wall in 5 min. what is the specific activity?
an unknown amount of CO2 occupies a volume of 9.04 L at 25°C and 1.17 atm pressure. How many moles of CO2 are there in this sample?
How much heat do you need to raise the temperature of 150 g of gasoline from 30oC to 15oC?
A piece of metal of mass 27 g at 105?C is placed in a calorimeter containing 49.2 g of water at 19?C. The ?nal temperature of the mixture is 30?C. What is the speci?c heat capacity of the metal.
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