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Air passes through a naphthalene tube, that has an inside diameter of 2.5 cm, flowing at a bulk velocity of 15 m/s. The air is at 283 K and an average pressure of 1:013 × 105 Pa.
Assuming that the change in pressure along the tube is negligible and that the naphthalene surface is at 283 K, determine the length of tube that is necessary to produce a naphthalene concentration in the exiting gas stream of 4:75 × 10-4 mol/m3.
At 283 K, naphthalene has a vapor pressure of 3 Pa and a diffusivity in air of 5:4 × 10-6 m2/s.
You need to make a 115 µH inductor on a cylinder that is 5.0 centimeter long and 1.0 centimeter in diameter, Determine what diameter wire should you use
a toy cannon uses a spring to project a 5.39-g soft rubber ball. the spring is originally compressed by 4.93 cm and has
On the basis of the Bohr model consider the doubly ionized Li atom: If an electron in this atom makes a transition from n=2 to the ground state, discover the energy, momentum and wavelength of the emitted photon.
Electric eels generate electric pulses along their skin that can be used to stun an enemy when they come into contact with it, How much energy is delivered to the unfortunate enemy with a single pulse, assuming a steady current
Find the wavelength of the light emitted by atomic Hydrogen according to Ballmer's formula with m = 5 and n = 9
A batted baseball leaves the bat at an angle of 34.0 degrees above the horizontal and is caught by an outfielder 365ft from home plate at the same height from which it left the bat. What was the initial speed of the ball
If the index of refraction in water is about nwater = 1.33 which substance, when shaped into a lens, would have the most focusing power, Acryliteor water? Explain.
How many nitrogen molecules must strike a 1 cm2 surface each second to exert a pressure of 1 atm (Assume that the molecules are all moving at the same speed, at a temperature of 300K, and 45 degree angle to the wall).
A horizontal wire is hung from the ceiling of a room by two massless strings. The wire has a length of 0.10 m anda mass of 0.008 kg. A uniform magnetic field ofmagnitude 0.075 T is directed from the ceiling to the floor.
Compare and contrast the processes of fusion and fission. Describe the challenges in harnessing fusion technology for domestic energy needs.
Two charged plates create a potential difference of 190 V. At a point halfway between the plates an electron is released from rest. What was the initial speed and direction of the proton
In a Rutherford scattering experiment a target nucleus has a diameter of 1.26E-14 m. The incoming α particle has a mass of 6.64E-27 kg. What is the kinetic energy of an α particle that has a de Broglie wavelength equal to the diameter of the target n..
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