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A 30-cm bar is made from putting together three 10-cm bars of steel, copper, and aluminium, each having cross-sectional area 4cm2. One end of the steel is in contact with a nice-water mixture. When the system comes into equilibrium,
a) What is the temperature at the end of each bar, and
b) At what rate is ice melting?
c) What is the effective thermal conductivity of the 3-barcombination?
d) Would your answers go up, go down, or stay the same if the order were changed to copper-steel-aluminium? (Do NOT solve the problem again to answer this question.) Describe.
Four point charges have equal magnitudes. Three are positive, and one is negative, find the ratio of the largest to the smallest net force magnitude
In a Compton collision, if the wavelength of the photon is 1.00 pm and its deflected angle is 60.0°
Calculate the energy of the electron in the ground state of double ionized lithium, which has an atomic number Z = 3
a spherical shell of radius r carries a uniform charge q. what is the potential at the center of the
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A tennis player tosses a tennis ball straight up and then catches it after 1.86s at the same height as the point of release. What is the acceleration of the ball while it is in flight
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An 80 kg man is one fourth the way up a 10 m ladder that isresting against a smooth frictionless wall. What is the normal force of the wall on the ladder
a wooden plank of length l and mass m is supported by an axle that passes through its center. a small package of mass
question two square oppositely charged conducting plates measure 33 cm on each side. they are placed close together and
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