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On October 21, 2001, Ian Ashpole of the United Kingdom achieved a record altitude of 3.35 km (11 000 ft) powered by 600 toy balloons filled with helium. Each filled balloon had a radius of about 0.
You are considering buying a hybrid car, but are skeptical of the manufacturer's claims. One model uses a ring-shaped flywheel to store energy.
Can someone please help explain why the negative slope of thesolid liquid line in the H2O phase diagram is unique? What does this situation tell about the density of liquid H2O andice?
You drop a 1.8 kg textbook to a friend who stands on the ground 12 m below the textbook with outstretched hands 1.50 m above the ground. (a) What is the speed of the textbook when it reaches the han
An automobile traveling 95 km/h ovetakes a 1.10 km long train traveling in same direction. The train speed is 75 km/h. how long does it take the car to pass the train and ow far will the car travele
If the EDTA had been dissolved in 100ml of 2.5M NaOH andsufficient water is added to make 1L, what major ionization formsof EDTA would be present? What would be the pH of the solution?
If 1 joule of heat added to the helium gas increases its temperature a given amount, the amount of heat that must be added to the argon gas to increase its temperature by the same amount is
At combustion temperatures, the equilibrium constant for thereaction of N2 with O2 is about 10^-14. Calculate the concentration of NO that is in equilibrium with atmospheric levels of nitrogen and o
A golfer imparts a speed of 26.7 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation. (a) How much time does the
As a 2.0 kg object moves along the x axis, the only force acting on it is given by Fx= (3x squared + 2x) Newtons where x is measured in m. If the object moves from x=1.0m to x=3.0m, what is its cha
What is the reaction when VO2+ ions are addedto a tenfold excess of sodium sulfite in order to formVO2+ ions? Also why does one need touse a tenfold of reducing agent?
A vertical spring of k=115 N/m supports a mass of 75g. The mass oscillates in a tube of liquid. IF the mass is initially given an amplitude of 5.0cm, the mass is observed to have an amplitude of 2.0
(a) Show that the oscillation is simple harmonic. (b) Find the period of the oscillation. Neglect the fact that the water has a damping effect on the motion.
A beaker of water rests on an electronic balance that reads 999.0 g. A 2.2 cm-diameter solid copper ball attached to a string is submerged in the water, but does not touch the bottom. Tension in the
A tennis ball is thrown from ground level with velocity v0 directed 30 degrees above the horizontal. If it takes the ball 1.0s to reach the top of its trajectory, what is the magnitude of the initia
Consider a gaseous binary compound with a molar mass of 62.09g/mol. When 1.39g of this compound is completely burned in excess oxygen, 1.21g of water is formad.
A truck driver used sand to soak up a 1 g spill of lindane(C6H6Cl6). He placed the contaminate soil in an open drum which then filled up with 150 L ofrain water during a rainstorm. You test the wate
The bulk modulus for bone is about 1.5*10^10Pa. If a diver-in-training is put into a pressurized suit, by how much would the pressure have to be raised (in atmospheres) above atmospheric pressure to
Two point charges are seperated by a distance R and they repel each other with a force F. If their seperation is reduced to 0.25 times the original value, what is the magnitude of the force of replu
A solution of 22.0g CaCl2 in 100.0 cm^3 of water has a vapor pressure of 22.8 torr at 26 celsius. Why does this result supprt the view that CaCl2 is completely ionized to Ca 2+ and Cl - in aqueous s
A portable electric water heater transfers 255 watts (W)of power to 5.5L of water, where 1W=1J/s How much time (in minutes) will it take for the water heater to heat 5.5 L of water from 27 degrees C
Ethylene Oxide(EO) is prepared by the vapor-phase oxidation ofethylene. Its main uses are in the preparation of the antifreezeethylene glycol and in the production of poly(ethyleneterephthalate), wh
Determine the maximum fraction of the unit cell volumethat can be filled by hard spheres in the simple cubic structure. Assume that a is the lattice constant.
The best balances commonly found in laboratories can weight amountsas small as 10-5 g. If you were to count outcarbon atoms at the rate of two per second, how long would it take you to count a pile
2.668 g of a particular metallic alloy, compounded of only Pb andSb, can be quantitatively converted into a 3.101-g mixture of theoxides PbO2 and Sb2O4. What was the percentage (by mass) of antimony