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A tennis player swings her 1000 g racket with a speed of 12.0m/s . She hits a 60 g tennis ball that was approaching her at a speed of 10.0m/s, What is the target's speed just after the bullet emerges
An ac generator has a frequency of 7.4 kHz and a voltage of 41 V. When an inductor is connected between the terminals of this generator, What is the inductance of the inductor
Draw the fat molecule whose components are glycerol and butanoic acid. You may omit hydrogen atoms.
Consider a series RLC circuit with R = 15 , L = 196 mH, C = 75 µF, and a maximum voltage of 148 V. What is the impedance of the circuit at resonance
How many different tripeptides can be made from two molecules of glycine and one molecule of histidine
A sample of gas has an initial volume of 13.4 L at a pressure of 1.27 atm. If the sample is compressed to a volume of 10.2 L, what will its pressure be
When at cruising altitude, a typical airplane cabin will have an air pressure equivalent to an altitude of about 2510 m. During the flight, what is the net force on one ear drum due to this pressure
A 49.6-mL sample of gas in a cylinder is warmed from 27*C to 89*C. What is its volume at the final temperature? (Assume constant pressure.)
The value of the magnetic field for a certain type of electromagnetic wave is 2.12 ?T. What is the value of the electric field for that wave
A 0.2527-g sample of a mixture of Mg(OH)2 and Al(OH)3 was treated with 50.00 mL of 0.225 mol L?1 HCl(aq). The resulting solution required 13.73 mL of 0.176 mol L?1 NaOH(aq) to neutralize the excess,
In one cycle, a heat engine does 310 J of work and releases 620 J of heat to a lower-temperature reservoir. What is the efficiency of the engine
When a 0.6333-g sample of a compound of carbon, hydrogen and sulfur was burned in excess oxygen, 0.9272 g CO2, 0.3795 g H2O and 0.6749 g SO2 were obtained. In a separate experiment, it was found tha
A typical nuclear power plant delivers heat from the reactor to the turbines at a temperature of 480°C. what is the maximum possible efficiency of these turbines
What was the percentage by mass of Mg(OH)2 in the original sample? [Hint: When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a chloride salt, water and CO2(g). Assume that all of the CO2(
The pressure in a vessel containing methane and water at 70°C is 10 atm. Estimate the mole fraction of methane in the liquid
A diverging lens with a focal length of -14 cm is placed 10 cm to the right of a converging lens with a focal length of 18 cm. Where will the final image be located
In a ballistics test, a 22.0g bullet traveling horizontally at 1300m/s goes through a 30.0cm -thick 350kg stationary target and emerges with a speed of 900m/s, How long is the bullet in the target
How many hydrogen bonds exist per full turn of the alpha helix? What is the rise in angstrom? Can these be different in different alpha helices? Explain.
The geometric angle BETWEEN the two bonds that connect an alpha-carbon to its nearest neighbors on the polypeptide backbone is approximately 109 degrees. Explain.
What is the mass percent of copper sulfate CuSo4 in a sample of cooper sulfate pentahydrate CuSO4*5H2O
The temperature increased by 10.08 oC. Use these data, plus the information given below for CO2 and H2O, to estimate the standard enthalpy of formation,
A converging lens can be used as a lighter (on a sunny day). If you want to use it to light a match, where should you put the match, What is the radius of the mirror
You're taking a self portrait in the mirror using a camera. If you stand 5.7 m away from the mirror and you see your face in focus. What distance will that scale show