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Calculate the pH of a solution that has an ammonium chloride concentration of 0.050M and an ammonia concentration of 0.045M. Explain using an ice diagram, if possible.
in the bohr model of the hydrogen atom an electron moves in a circular path around a proton. the speed of the electron
A bungee cord is stretched between two poles with a force of 393 N. What is the velocity of a wave on this bungee cord
Assuming biological substances are 98 percent water, estimate the masses of a cell with a diameter of 0.7 µm, a human kidney, and a fly. Take a kidney to be roughly a sphere with a radius of 5.0 cm and a fly to be roughly a cylinder 4.90 mm long a..
a model rocket is fired vertically from rest. It has a net acceleration of 17.5 m/s2. how long after liftoff does the rocket return to the ground
What is the mass of the liquid in the vat.
A circuit consists of a resistor in series with an inductor and an ac generator that supplies an rms voltage of 115 V. Find the average power dissipated in the circuit
One of the mirrors of a Michelson interferometer is moved, and 1000 fringe pairs shift past the hairline in a viewing telescope during the process. haw far was the mirror moved
A "swing" ride at a carnival consists of chairs that are swung in acircle by 12.0 m cables attached to a vertical rotating pole, asthe drawing shows. (θ = 66.0°) Suppose the total mass of a chair and its occupant is 234 kg.
A brave child decides to grab on to an already spinning merry-go-round. What is the moment of inertia of the merry-go-round with respect to its central axis
Light in a transparent material (index of refraction 1.333) strikes the boundary with another transparent material (n = 1.010). compute the critical angle for total internal reflection
Meteroids often move at high speeds relative to Earth. If meteroids approach Earth closely enough to hit our atmosphere, find the meteroid's kinetic energy
1500 cm3 of ideal gas at STP is cooled to -20o C and put into a 1000 cm3 container. what is the final gauge pressure?
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