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Two 10-cm-diameter charged rings face each other, 16.0 cm apart. Both rings are charged to + 50.0 nC . What is the electric field strength at the center of the ring?
Write the balance equations for the reduction of benzil or camphor assuming that each mol of NaBH4 provides four moles of hydrid.
Consider a railroad flat car of weight W=2760 N that can roll without friction along a straight horizontal track. Initially a man of weight w=496 N is simply standing on the car, which is moving to
A 10 cm long thin glass rod is uniformly charged to +50nC . A small plastic bead, charged to - 5.5nC , is 4.5cm from the center of the rod. What is the magnitude of the force on the bead?
A 3000 Kg object is lowered by a cable with an acceleration of 1.000m/s2. What is the tension in the cable?
The reaction 2 Mg(s) + O2(g) ® 2MgO(s) has associated with it a negative value forΔS, and it is a highly spontaneous process.The second law of thermodynamics states tha
Decant about 4 mL of the NaOH solution into a 500 mL polyethylenebottle. Dilute to 500 mL with previously boiled, deionized water cooled to room temperature. Calculate an approximate molar concentra
A projectile of mass 9.12g is fired horizontally with a speed of 496m/s into a ballistic- pendulum bob of mass 3.1kg that is initially at rest and has a suspension length of 0.62m. Compute a) the ve
How would you compare the removal of polycyclic aromatic hydrocarbons with clay versus the removal of the PAH's with bentonite?
For a diverging lens in air with one flat surface, the radius of curvature for the curved surface is 20.0cm. what must the index of refraction be so that the focal length is -15.0cm?
Table sugar (sucrose, C12H22O11) and table salt (NaCl) are both crystalline, colorless solids which are similar in outward appearance. You are given 100 grams of a mixture of these two solids.
If the potential difference across the primary coil is 25.0 V, what is the effective load resistance of the secondary coil if it is connected across a 125 ohms resistor?
50.0mL of a solution with calcium oxalate required 1.76mL of0.00101M premanganate to titrate it. What is the Ksp value for calcium oxalate?
A child pulls a friend in a little red wagon with constant speed. If the child pulls with a force of 16 N for 11.6 m, and the handle of the wagon is inclined at an angle of 29° above the horizon
How long after the switch is closed will it take for the current in the circuit to reach half of its maximum value ?
A reaction takes place between sodium chloride and hydrochloric acid. The products of this reaction are sodium sulfate(Na2SO4) and hydrochloric acid. What is the balanced equation that represents this
a. Calculate the total work done in one cycle in each cylinder of the engine, and the heat released when the gas is cooled to the temperature of the outside air. b. Calculate the volume of the air-f
A cylinder containing helium gas has a pressure of 235atm at 22 degreeC. What will be the pressure of the helium if the cylinder is placed in a container of liquid nitrogen at -196degree C?
An arrow, starting from rest , leaves the bow with a speed of 25.0 m/s. if the average force exerted on the arrow by the bow were doubled,all else remaining the same, with what speed would the arrow
What volume of water vapor is produced by burning 500g of gasoline at STP and a temp of 18 degreeC. Determine the density of propanegasC3H8, in grams per liter at 22 degree C and748 too??
You are designing a small coil (called a search coil) to measure magnetic fields. It is to have a diameter of 3.20 cm and is to be designed so that flipping it 180 degree in a field of 0.130 T cause
What is the molarity of asodium vanadate (Na3VO4) solution if 35.6mL of the solution are needed to titrate a 0.759g sample of pure potassium sulfite?VO4-3+SO3-2+4H+--->VO++SO4-2+2H2O
A 15.8 kO resistor and a capacitor are connected in series and then a 12.0 V potential difference is suddenly applied across them. The potential difference across the capacitor rises to 5.68 V in 1.
The velocity of a diver just before hitting the water is -11.6 m/s, where the minus sign indicates that her motion is directly downward. What is her displacement during the last 1.12 s of the dive?
A hot-air balloon is rising upward with a constant speed of 3.87 m/s. When the balloon is 3.73 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much