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At 20 deg C an alum ring has an inner diameter of 5.000 cm and a brass rod has a diameter of 5.050 cm. (a) if only the ring is heated, what temp must it reach so that it will just slip over the rod? (b) WHAT IF? What if both are heated together, what temperature must they both reach so that the ring just slips over the rod? Would this latter process work? [coefficient of linear exp for alum is 2.4 e-5, for brass it's 2.0 e-5]
A container with a pressure of 3 atmospheres and a temperature of 200c contains 36 gram of nitrogen. what is the mean distance between molecules, assuming that the container is a cube
A hang glider and its passenger has a mass of 95kg. The wing has an area of 11.0m^2. what must be the airspeed above the wing to create lift
Drawing on Erastothenes' method, if two observers are due north and south of each other and are separated by 490 km, what is the circumference of their spherical world if they see the same star on their meridian at altitudes of 29 degrees and 45 degr..
There is a uniform electric field throughout the region given by E = 4.9i + 7.1j + 3.6k in N/C units, What is the magnitude of the total flux through the five non-shaded faces
A block of ice with mass 2.00 slides 0.895 down an inclined plane that slopes downward at an angle of 39.5 below the horizontal. what is its final speed
To monitor the breathing of a hospital patient, a thin belt is girded around the patient's chest as in the figure below. The belt is a 160-turn coil. find the magnitude of the average induced emf in the coil during that time
An electron is confined to move in the xy plane in a rectangle whose dimensions are Lx and Ly. That is, the electron is trapped in a two-dimensional potential well having lengths of Lx and Ly. In this situation, the allowed energies of the electron d..
A board, with a mass m = 20.0 kg and a length of 4.00 m, is supported by two identical vertical connected to the ends of the board, What are the tensions in the two ropes
q1. what is the electric potential energy of three equal positive charges of 1.33 microc while they are arranged to
tired of walking down the stairs a 75 kg engineering student designs an ingenious device for reaching his third floor
A 75-kg piece of metal has specific heat 430 J/kg°C and is initially at 950°C. To cool it down, it is dunked into 710 kg of oil that has a temperature of 32°C and specific heat of 2700 J/kg°C. Assuming that heat flows only between the oil and the m..
The refractive indices of materials A and B have a ratio of nA/nB = 1.66. What is the speed of light in material B
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