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An iron bar 40 cm long is braised to a copper bar 50 cm long and of the same diameter. The free end of the iron bar is kept at 0 oC while the free end of the copper bar is at 100 oC.
What is the temperature of the junction point? What is the heat flow down the rod if its cross-sectional area is 1.50 cm2?
How far from the center of the earth must a person be to experience acceleration as the reason of gravity that is one half the acceleration at the surface.
A long wire is known to have a radius greater than 5.2 mm and to carry a current that is uniformly distributed over its cross section, What is the radius (in mm) of the wire
How many electrons must be removed from each of two 4.4-kg copper spheres to make the electric force of repulsion between them equal in magnitude to the gravitational attraction between them?
How much force is needed to hold a 7.0 cm diameter hose delivering 440 L/min through a 0.73cm diameter nozzle.
A high-pass RC filter is connected to an AC source with a peak voltage of 18 V. The peak capacitor voltage is 5.27 V
The voltage across a resistor is equal to the product of the current through the resistor and the resistance of the resistor, What is the potential difference of the battery
What magnitude of charge must be given to the drop
Each cable has a length of l = 2.70 -{rm m}. What is the tension T in each of the cables? Use 9.80- {rm m/s}^2 for the magnitude of the acceleration as a result of gravity.
Suppose that an electron trapped in a one-dimensional infinite well of width 322 pm is excited from its first excited state to the state with n = 5. What energy (in eV) must be transferred to the electron for this quantum jump
A dog (mass 11.5 kg) sits on a sled (mass 5.1 kg) that is being pushed with a force of 29 N on a flat snowy surface. what is the coefficient of kinetic friction for the sled sliding on the snow
Four protons, each with charge +e, are fixed at the corners of a square of side length a, Determine magnitude and direction of the electric field E
Find the charge on sphere A. How far from the dog will the suitcase land.
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