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A car is traveling 80 km/hr in a school zone. A police car starts from rest just as the speeder passes it and accelerates at a constant rate of 8 km/hr·s. When does the police car catch the speeding
Three equal point charges, each with charge 1.45 mu C, are placed at the vertices of an equilateral triangle whose sides are of length 0.250 m. What is the electric potential energy U of the system?
A simple harmonic oscillator consists of a block of mass 2.40 kg attached to a spring of spring constant 160 N/m. When t = 3.00 s, the position and velocity of the block are x = +0.129 m and v = +3.
Draw all stereoisomers of 2,3,4-tribromopentane. You should find two meso structures and one pair of enantiomers. Use bold and hashed wedges to show the stereochemistry.
What is the limiting reactant when 3.41g of lithium with 2.79g of copper II nitride?predict the products, write a balanced equation, calculate the limiting reactant, calculate the amount of lithium
What is the balanced equation for C2H4+3O2 -> 2CO2+2H2O
A 1300-{rm kg} car rolling on a horizontal surface has speed v = 50 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.7 m. What is the spring stiffness consta
How many moles of methane occupy a volume of 2.00 L at 50.0 °C and 0.500 atm? (R = 0.0821 atm·L/ mol·K)
How much heat does your body lose when 1.8 of sweat evaporates from your skin at 25 ? (Assume that the sweat is only water.) The heat of vaporization of water at 25 is 44.0.
A catapult launcher on an aircraft carrier accelerates a jet from rest to 77 . The work done by the catapult during the launch is 7.0×107 J. (a) What is the mass of the jet?
Write the expression for Keq of the following reaction:
When the wax melts, the block slides out to the end of the rod. What is the final angular velocity? Give your answer in rpm.
A 135 mL sample of a 15.0 M ethylene glycol (rm C_2H_6O_2) solution is diluted to 1.50 L. What is the freezing point of the final solution? (Assume a density of 1.06 g/mL for the final solution.)
What is the magnitude of the net gravitational force on the mass at the origin due to the other two masses?
How can you improve the overall yield of vanillyl alcohol from the reduction of vanillin?
Calculate the initial rate of the NO reduction at 1100 K if 400.00 mg of NO and 600.00 mg of H2 are confined to a 5.00 L reaction vessel.
A dog searching for a bone walks 4.00 m south, then 8.20 m at an angle of 30.0° north of east, and finally 12.0 m west. Use graphical techniques to find the direction of the dog's resultant disp
What is the pH at the equivalence point when 30.0mL of 0.175 mol/L HCOOH is titrated with 0.135 mol/L NaOH? Assume the temperature is 25 degrees celcius. For HCOOH, pKa=3.74 at 25 degrees celcius.
A space station, in the form of a wheel 105 m in diameter, rotates to provide an "artificial gravity" of 2.50 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of ro
What mass of octane must be burned in order to liberate 5350 kJ of heat? ΔHcomb = -5471 kJ/mol.
A horse canters away from its trainer in a straight line, moving 116 m away in 14.0 seconds. it then turns abruptly and gallops halfway back in 4.8 seconds. calculate (a) its average speed and (b) i
Calculate the freezing point of a nonionizing antifreeze solution containing 388 g ethylene glycol, c2h6o2 and 409 g of water
What is the tangential acceleration of a bug on the rim of a 12.0 in. diameter disk if the disk moves from rest to an angular speed of 78 revolutions per minute in 4.0 s?
Holding a long rope by its upper end, you lower it onto a scale. The rope has a mass of 0.13 kg per meter of length, and is lowered onto the scale at the constant rate of 1.4 m/s. Calculate the thru
A solution contains 410.3 g of H2SO4 per litre of solution . If the density is 1.243 g/ml, what will be its molarity and molality?