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A car approaches a stationary police car at 80mi/hr. The frequency of the siren (relative to the police car) is 500 Hz. What is the frequency (in Hz) heard by an observer in the moving car as he app
If 5.25mL of 0.1000 M NaOH solution is neededto just neutralize excess acid after 20.00 mL of .1 M HCl was addedto 1.00 g of an antacid, how many moles of acid can the antacid counteract per gram?
The first ionization energy for boron is 801 kJ per mole. what wavelength of light( in nanometer) would supply photons with this energy?
Find the minimum value for the average cost per unit. The minimum average cost per unit for this function is ______________ dollars per unit?
A 35 ml solution of .241 M Hcl is titrated with .127M of NAOH. How many ML of NAOH is required to reach equivalence point?
Find the profit equation and use it to compute the profit and marginal profit for a production level of 2250 units. The profit when 2250 units are produced is _____________dollars?
A steady wind of 25 knots over a very long fetch can create waves of 3-meter height, a period of approximately 10 seconds, and a speed of 16m/s. A steady wind of 40 knots can create waves of 6-meter
Moreover, the correlation between male and female life expectancies was found to be 0.95. Use this information to estimate female life expectancy in a country where the male life expectancy is 62.8
A gondola can carry 20 skiers, with a total mass of up to 1760kg . The gondola ascends at a constant speed from the base of a mountain, at 2450 m, to the summit at 3910 m. How much work does the mot
The reaction between Mg (s) and HCl (aq) takes place inside a calorimeter. The thermometer registers an increase in temperature for the solution inside the calorimeter.
When cylinder-head bolts in an automobile engine are tightened, the critical quantity is the torque applied to the bolts. Why is the torque more important than the actual force applied to the wrench
An earthquake emits both S waves and P waves which travel at different speeds through the Earth. A P wave travel 9000 m/sec and an S wave travels at 5000 m/sec. If P waves are received at a seismic
A student obtained the silica gel TLC plate shown by spotting samples of MidolTM, caffeine, and acetaminophen on the plate and eluting with petroleum etherchloroform (9:1 v/v).
A Ferris wheel at a carnival has a radius of 38 feet. Suppose it turns at a rate of 100revolutions per hour. Find the angular speed of the wheel in radians per hour.
Two circus clowns (each having a mass of 50kg) swing on two flying trapezes (negligable mass, length 25m) towards each other. At the peak of the swing, one grabs the other, and the two swing back to
Explain why the solvent must not be allowed to evaporate from theplate during development n a thin layer chromatography.
A boeing 737 airliner has a mass of 20,000kg and the total area of both wings (top or bottom) is 100m^2. What must be the pressure difference between the top and bottom surface of each wing when the
Using the result of part (c) and the torque equilibrium equation, with torques computed around the second pivot point, find the woman's position when the beam is about to tip.
The space shuttle uses the oxidation of methyl hydrazine, N2H3CH3(l), for propulsion. The oxidation proceeds by the following reaction: 5N2O4(g) + 4N2H3CH3(l) --> 12H2O(g) + 9N2(g) + 4CO2(g)
Find the x-intercepts, y-intercept, and asymptotes for the graph of each function, and sketch the graph. f(x) = x3 - 3x2 + 4.
A string is stretched and fixed at both ends, 200cm apart. If the density of the string is .015 g/cm, and its tension os 600 N, what is the wavelength (in cm) of the first harmonic?
One hundred mL of 0.00075 M sodium sulfate, Na2SO4, and 50.0mL of 0.15 M barium chloride, BaCl2, solutions are mixed. Write the molecular and net ionicequation for the reaction that occurs in th
Consider an arithmetic sequence whose 5th term is 62 and whose 11th term is 32. Determine the generating function for this sequence and determine the 21st term.
Water pressurized to 3 * 10^5 pa is flowing at 5 m/sec in a horizontal pipe which contracts to 1/3 its former area. What is the pressure and velocity of the water after the contraction?
A hydraulic lift raises a 2000 kg automobile when a 500 Nt force is applied to the smaller piston. If the smaller piston has an area of 10 cm^2, what is the cross-sectional area of the larger piston