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A curent of 2.5 A is carried by a copper wire of radius 1.39 mm. If the density of conduction electrons is 8.47^28 m^-3, what is the drift speed of the conduction electrons?
The coefficient of static friction between his hands and the book is 0.42. To keep the book from falling, what is the magnitude of the minimum pressing force that each hand must exert?
A flat copper ribbon 0.330 mm thick carries a steady current of 50.0 A and is located in a uniform 1.30-T magnetic field directed perpendicular to the plane of the ribbon. If a Hall voltage of 9.60
Assuming the origin is placed where the bullet begins to move, the force exerted on the bullet by the expanding gas is F = a + b x - c x^2, where a = 7800 N, b = 10400 N/m, c = 22200 N/m^2, with x i
Household bleach is a 5 mass % aqueous soln. of sodium hypochlorite(NaOCl). What is the molality of the bleach. What is the mole fraction of NaOCl in the bleach.
The liquid-drop model of the nucleus suggests that high-energy oscillations of certain nuclei can split ("fission") a large nucleus into two unequal fragments plus a few neutrons.
Epsom salts are hydrates of magnesium sulfate. The formula for Epsom salts is MgSO4 . xH2O. A 7.834g sample is heated until a constant mass of 3.825g is obtained, indicating that all the water has b
What is the entropy change of the Cu metal? What is the entropy change of the liquid water? What is the total entropy change in the system?
What is the normality of solution of potassium permaganate if 0.7778 grams of potassium chromate where used to make 0.05 liter of this solution.
What potential difference is required to reduce the initial speed of the proton by a factor of two?
Dissolved silica in river water can be determined by the formation of a green-yellow silicmolybdate complex and the comparison of its absorbance against a reference standard.
The path is frictionless except for a distance of 0.8 m along the incline which has a coefficient of friction of 0.5.
What should be the concentration of the potassium thiocyanate solution in order that each mL of solution correspond to exactly 1 mg of arsenic present?
At local coffee shop, you purchase a cup of coffee,but at 98.4 degree centigrade, it is too hot to drink.You add 23.0g of ice that is at -2.2degree centigrade, to 248mL of coffee.
A 0.22 m(micro)F capacitor by a 1.5-V battery. After being charged, the capacitor is connected to a small electric motor. Assuming 100% efficiency. 1) what initial voltage must the capacitor have if
A train is traveling up a 4.1 degrees incline at a speed of 2.45 m/s when the last car breaks free and begins to coast without friction. How far did the last car travel before momentarily coming to
A 0.22 m(micro)F capacitor by a 1.5-V battery. After being charged, the capacitor is connected to a small electric motor. Assuming 100% efficiency. A) to what height can the motor lift a 5.0-g mass?
Synthesize (3S,4R)-3,4-dibromo-1-cyclohexylpentane (and its enantiomer, since a racemic mixture will be formed) from ethyne, 1-chloro-2-cyclohexylethane, and bromomethane and any other reagents as
From the chart of the nuclides, for each of the two decay transitions what are the parent and daughter nuclides, the atomic mass numbers and atomic numbers, the modes of decay and energies, and the
The aldol reaction is catalyzed by acid as well as by base. What is the reactive nucleophile in the acid-catalyzed aldol reaction? Propose a mechanism.
A 9.45 kg projectile is fired vertically upward. Air drag decreases the mechanical energy of the projectile-Earth system by 69.0 kJ during the projectile's ascent. How much higher would the projecti
A 0.22 m(micro)F capacitor by a 1.5-V battery. After being charged, the capacitor is connected to a small electric motor. Assuming 100% efficiency.
Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25 degrees Celsius. 1.04 gram of rubbing alcohol on 53 gram alu