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Calculate the rate of diffusion of Sodium chloride (NaCl) at 180 C through a stagnant film of water, 1.0 mm thick, when the concentrations are 20 % and 10% by weight on either side of the film. Density of 20% and 10% NaCl by weight are 1.1489 and 1.067 g /cc respectively. Diffusivity of NaCl in water is 1.26 x 10-6 m2 /sec.
A bullet is shot vertically up with v0 from ground level. The definition of vertical is by a plumb bob, find the location where the bullet returns to the ground
An aircraft weighing 840 Newton is accelerated at 8.3 m/s2 for 5 s, at which time the aircraft launches. Find what force is required to launch the aircraft
A car is driving directly north on the freeway at a speed of 118 km/h and a truck is leaving the freeway driving 89 km/h in a direction that is 39° west of north
One of the harmonics of a column of air open at one end and closed at the other has a frequency of 448 Hz, What is the fundamental frequency of the air column
Light strikes a cube with index of refraction (2) at an angle of 30 deg. At what angle will the light exit the cube
a beam of electron is that through a small hole into vacuum between two parallel plates wich are separated by a
A soft tennis ball is dropped onto a hard floor from a height of 1.90 m and rebounds to a height of 1.42 m. Calculate its velocity just after it leaves the floor
The Earth is about to be swallowed by a black hole with the mass equal to ten Solar masses. At what distance from the black hole will the Earth be pulled apart by tidal forces - i.e. find the Roche limit for this system.
A Ferris wheel with a radius of 8.1 meter rotates at a constant rate, completing one revolution every 45 sec. Determine the direction and magnitude of a passenger's acceleration when at the top of the Ferris wheel
Imagine you are sent in a satellite above Earth. Find what would the velocity of the satellite be for the satellite to orbit around the earth
Two capacitors are connected to a battery. The battery voltage is V=60.0 V, and the capacities are C1 = 2.00 μF and C2 = 4.00 μF. Determine the total energy stored bythe two capacitors when they are wired (a) in parallel and (b) inseires.
An electron collides elastically with a hydrogen atom that is initially at rest. Assume all the motion occurs along a straight line. What fraction of the electron's initial kinetic energy is transferred to the atom? (Take the mass of the hydrogen ato..
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