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Calculate the hydronium ion concentration of a buffer that is 0.0500 M in potassium hydrogen phthalate (KHP) and 0.150 M in potassium phthalate (KrP)
two long and parallel straight wires a and b carrying currents of 8.0 a and 5.0 a in the same direction are separated
A step-down transformer is used for recharging the batteries of portable devices. calculate rms output voltage of the transformer
On average, an electric water heater operates for 2.2h each day. What is the resistance of a typical water heater
Determine the natural frequencies and mode shapes of the system shown in Figure.
A river flows due south with a speed of 1.0m/s . A man steers a motorboat across the river; his velocity relative to the water is 4.3m/s due east. What is the direction of his velocity relative to the earth
Two girls playing catch Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 23 m/s at an angle 27 degrees; What is the speed of the ball when it leaves Sarah's hand
An engine performs work as a function of time (t) according to the subsequent equation: W = a*t^5, where a is a constant. Find the time dependence of output power of this engine
A certain superconducting magnet in the form of a solenoid of length 0.40 m can generate a magnetic field of 11.0 T in its core when its coils carry a current of 145 A. The windings, made of a niobium-titanium alloy, should be cooled to 4.2 K. Discov..
On a soup production line, 100L of concentrated broth(c=1cal/g C) at 90 C will be mixed wth 200L of water. What should be the temperature of the water before mixing
suppose that you have found a way to convert the rest energy of any type of matter directly to usable energy with an
By doing a nuclear diffraction experiement, you measure the de Broglie wavelength of a proton to be 9.48 fm. evaluate the speed of the proton
A heat pump moves heat from outside, where the temp is 1 degree C, to inside a building, where the temp is 20 degrees C, How much heat is dumped into the building in each cycle
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