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A sledge loaded with bricks has a total mass of 18.1 kg and is puled at a constant speed by a rope inclined at 19.0^above The horizontal. determine the mechanical energy lost due to friction
how many mL of 0.294 m sulfuric acid would it take to neutralize 61.71 mL of 0.519 M sodium hydroxide
Provide three balanced chemical equations that will precipitate Pb2+ from a solution. Exclude substances containing chloride or chromate ions
Discuss your ideas for how security in a courthouse or justice center needs to be managed when proceedings are going on not only in courtrooms but also in other areas of the facilities, such as vaca
A camera with interchangeable lenses is used to photograph a distant object. The angular size of the object is 27 degrees. What is the longest focal length lens
In an RLC circuit, the following three elements are connected in series: a resistor of 45.0 ?, a 21.0-mH inductor, and a 0.450-µF capacitor. Find the power factor for the RLC series circuit
A sample of an unknown gas effuses in 11.9 min. An equal volume of H2 in the same apparatus at the same temperature and pressure effuses in 2.19 min. What is the molar mass of the unknown gas
Now suppose the gliders in the previous problem collide completely inelastically so that they stick together rather than rebounding off each other after they collide. Compare the initial and final k
You throw a ball with mass 0.40 kg against a brick wall. It hits the wall moving horizontally to the left at 30. m/s, find the average horizontal force the wall exerts on the ball during the impact
What product or products would you expect to obtain by the addition of bromine to cis-cinnamic acid, assuming that it reacts by the same mechanism as the trans acid
What are the Sum of Squares between (SSB) and what is the degress of freedom within (dfW)
1.00 mol HF and 0.500 mol NaOH are both dissolved in water making 1.00L solution. Calculate the pH of the solution
A 1.50-m-diameter MRI solenoid with a length of 2.20m has a magnetic field of 1.60T along its axis. find the emf in one turn of the solenoid's windings
A coil of wire has a resistance of 38.0 ? at 25° C and 43.7 ? at 56° C. What is the temperature coefficient of resistivity
Standard solutions of calcium ion are suually prepared by weighing an apporpriate amount of primary standard grade calcium carbonate, dissolving it in concentrated HCl, and diluting to the appropria
To determine the muzzle velocity of a bullet fired from a rifle, you shoot the 3.71-g bullet into a 2.45-kg wooden block. find the velocity of the bullet on leaving the gun's barrel
A ball falls straight down onto a wedge that is sitting on frictionless ice. The ball has a mass of 3.21 kg, what is the velocity of the ball after the collision
Draw structure of the product(s) (show stereochemistry) of bromine addition to fumaric acid assuming that bromine adds to this compound the same way it does to cinnamic acid.
A compound used to treat manic depressives has the formula Li2CO3. Which of the following is the correct name for this compound
A 10cm-diameter disk emits light uniformly from its surface. 20rm cm from this disk, along its axis, is an 8.0cm-diameter opaque black disk, What is the diameter of the completely dark part of this s
After a completely inelastic collision, two objects of the same mass, Find the angle between the initial velocities of the objects
A pipeline of 0.2m in diameter is flowing with water and ends in a constricted pipe of 0.1m diameter. find the velocity and the flow rate in the constricted section
A light bulb is wired in series with a 131-? resistor, and they are connected across a 120-V source. What are the two possible resistances of the light bulb
Describe the four models of democracy. Tell which one you think most closely resembles today's model in America. Which model do you prefer, and why?
Two capacitors, C1 = 4.00 µF and C2 = 13.0 µF, are connected in parallel, and the resulting combination is connected to a 9.00-V battery. Find the equivalent capacitance of the combinati