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A motor spins an 2 kg block around on an 80 cm arm at 200 rpm. The blosk is supported by a steel table after the motor stops. How long does the block take to come to rest? How many revolutions does
Assuming that the styrofoam has absorbed a negligible amount of heat and that no heat was lost to the surroundings, what is the specific heat of the metal? Using the table for specific heat, what is
If the distance between the two mirrors is 0.90 m, how far in front of the eyepiece should you place the photographic film to record the image of a star?
You add 8950 J of heat to 3.00 mol of iron. The molar mass of iron is 55.845 g/mol. a) What is the temperature increase of the iron?
Calculate ΔG° at 25°C for the followingreaction.BaSO4(s) -Ba2+(aq) +SO42-(aq) What is the value of the solubility product constant,Ksp, for this reaction at 25°C?
What is the maximum amount of P2O5 that can theoretically be made from 272g of O2 and excess phosphorus? Express your answer numerically in moles.
1.34g of sodium carbonate isadded to excess 0.125mol L-1 hydrochloric acid solution.What volume of hydrochloric acid would be needed to react completely with the sodium carbonate?
A San Francisco cable car loses its brakes and runs down a hill 45 m high. The mass of the train and its passengers is 7,285kg. The final velocity of the train at the bottom of the hill is 4m/s. How
At a temperature for which the solubility product of calciumcarbonate is 4.7 x 10-9, what mass of the salt will dissolve in 100 mL of water?
There are 200 students riding bikes each producing 110W of heat out put which is used for a heat engine which has an efficiency of 44.1% runing between 30c and -5c. what is the power in watts the he
A hunter who is a bit of a braggart claims that, from a distance of 1.8 km, he can selectively shoot eiither of two squirrels who are sitting 11 centimeters apart on the same branch of a tree.
The following eq. represents the complete combustion ofethane: 2C2H6(g) + 7O2(g) ---->4CO2(g) + 6H2O(g)At the same temperature and pressure, what is the maximum volume in liters of carbon dioxide
Find the exact values of sin 2u, cos 2u, and tan 2u using double- angle formulas. cos u= -12/13, pi/2 < u < pi. Find the exact values of sin 2u, cos 2u.
The copper wire in a typical residential building has a cross-sectional area of 3.31 x 10-6 m2. If it carries a current of 10.0 A, what is the drift speed of the electrons?
Use double-angle formulas to rewrite the expressions: 8 cos^2 x - 4 , 1/4 cos^2 x - 1/8 use the power-reducing formulas as many times as possible to rewrite the expression in terms of the cosine.
Two capacitors, one 12.0 µf and the other of unknown capacitance, are connected in parallel across a battery of EMF 9.0 V. The total energy stored in the two capacitors is 0.0115 J. What is th
What is the partial pressure of oxygen in a container that contains 2.0 mol of oxygen, 3.0 mol of nitrogen, and 1.0 molof carbon dioxide when the total pressure is 900 mmHg?
Which statement is true about a frequency distribution? Which statement is not true about the class intervals in a frequency distribution?
IN relation to my previous question about cationic polymerization,I'd like to ask another question. (It's a long question and I'msolving it but there are glitches, and there are some things Idon't g
A 2.0μF capacitor and a 4.0μF capacitor are connected in series across 1000V. The charge capacitors are then disconnected from the source and connected to each other with terminals of like sig
The edges of a cube consists of equal resistors of resistance R, which are joined at the corners. Let a battery be connected to two opposite corners of a face of the cube. What is the efective resis
What is the maximum concentration of chloride ions in asolution that contains 0.100 M Pb. The Ksp for lead (II)chloride is 1.0 x 10-4.
Are your cosine and sine models the same function? Explain why or why not. If so, show algebraically why these two graphs are equivalent.
A 1.80 cm x1.80 cm parallel-plate capacitor has a 2.10 mm spacing. The electric field strength inside the capacitor is 1.00×10^5 V/m . What is the potential difference across the capacitor?
A sample of Polystyrene that is can be prepared by heating styrene with tribromobenzoyl peroxide in the absence of air has this empirical formula ( Br3C6H3(C8H8) n ) where n canvary from sample to s