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In this position, she presents the maximum cross-sectional area and thus maximizes the air-drag force on her. (a) What is the magnitude of the drag force on the sky diver?
How does a catalyst affect the rate of a chemical reaction? Provide a sketch of a potential energy diagram showing how a catalyst affects the rate of a chemical reaction. Label appropriately.
The switch in the circuit shown below is open for t<0 and is then thrown closed at time t = 0. Find the current in the conductor in the inductor and the current in the switch as a function of tim
A hollow cylinder (hoop) is rolling on a horizontal surface at speed v = 4.3 m/s when it reaches a 11° incline. (a) How far up the incline will it go?
The rate constants of some reactions double with every 10 degree rise in temperature. Assume that a reaction takes place at 305 K and 315 K. What must the activation energy be for the rate constant
A railroad diesel engine weighs five times as much as a freightcar. If the diesel engine coasts at 4 km/h into a freightcar that is initially at rest, how fast do the two coast after they couple tog
By how much does the ball clear or fall short of clearing the crossbar?
The 14C isotope, like all radioactive isotopes, decaysvia first order kinetics. It has a half life of 5730 years. Adocument believed to 2000 years old was analyzed and was determined that 84.4%
A 18.0-N weight slides down a rough inclined plane which makes an angle of 29.0 with the horizontal. The weight starts from rest and gains a speed of 15.0 m/s after sliding 150 m. How much work is d
The Decomposition of SO2Cl2 is firstorder in SO2Cl2 and has a rate constant of1.42*10-4s-1 at a certain temperature. What is the half-life for this reaction?
A race car goes around a level, circular track with a diameter of 1.00 km at a constant speed of 77 km/h. What is the car's centripetal acceleration in m/s^2? Compare this answer with the accelerati
If you drop an object from a height of 1.5 m, it will hit the ground in 0.56 s. If you throw a baseball horizontally with an initial speed of 15 m/s from the same height, how long will it take the b
The lense of a slide project has a focal length of 10 cm. It is used to project the image of a 35 mm slide (24 mm x 36 mm) on a square screen located 6m away. Of the following screen width, what is
A 0.8870 g sample of a mixture of NaCl and KCl is dissolved inwater and treated with excess AgNO3 to yield 1.822 g ofAgCl. Calculate the percent by mass of each compound in the mixture.
Two converging lensees, the first with focal length 25 cm and second with the focal length 20 cm, are separated by 30 cm. A 4 cm tall object is placed 50 cm infront of the first lens. What is the hi
Suppose the insulating qualities of the wall of a house come mainly from a 3.5 inch layer of brick and an R-19 layer of insulation, as shown in Fig. 14-19.
To eliminate the safety hazard created from the first reaction(decomposition of sodium azide (NaN3) into sodium andnitrogen), the sodium produced is reacted with potassium nitrate toyield sodiu
Suppose the volume inside an airbag was fixed at 55 liters and temperature remained constant. What would be the new pressure inside the bag, as now additional nitrogen was present?
The pressure of 5.0 L of an ideal gasin a flexible container is decreased to one-forth of its original pressure, and its absolute temperature is decreased to one-forth of the original. What is the f
A flask is sealed at 600 K with partial pressures of H2 = 1.98atm and I2 = 1.71 atm. The gases react to form HI according to the equation above. Determine the partial pressure of each gas at equilibr
How is the phenomenon of temp explained on the basis of the kineticmolecular theory? what microscopic property of gas moleculesis reflected in the temp measured?
At a particular temperature,N2O5 decomposes according to first-order kinetics with a half-lifeof 3.0 seconds. If the initial concentration of N2O5 is 9.2x10^-2M,what will be the concentration of N2O
Determine the activation barrier for the reaction. What is the value of the rate constant at 18 degree Celsius?
A 5 kg box with initial speed 4 m/s slides across the floor and comes to a stop after 0.7 sec. a. What is the coefficient of kinetic friction ? b. How far does the box move ?
A computer disk drive is turned on starting from rest and has constant angular acceleration. If it took 0.540 for the drive to make its second complete revolution, how long did it take to make the f