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You drop a 289-g silver figure of a polar bear into the 251-g aluminum cup of a well-insulated calorimeter containing 275 g of liquid water at 23.1°C. The bear's initial temperature is 95.7°C. What is the final temperature of the water, cup, and bear when they reach thermal equilibrium? The specific heats of silver, aluminum, and liquid water are, respectively, 234 J/(kg·K), 910 J/(kg·K), and 4190 J/(kg·K).
A 22 gauge NiAg wire is 22.5 km long. The resistivity of the NiAg wire is 33.0*10^-8 Ohm*m. The cross sectional area of the wire is 3.22*10^-7. How much energy is dissipated in a day
a bimetalic strip consists of a thinstip of brass alphabrass19x106co-1 riveted to a thin strip of steel
When verticaly falling sand hits a horizontally moving cart, the cart slows. avoid any friction between the cart and the tracks. Give two reason for this, one in terms of a horizontal force acting on the cart, and one terms of momentum conservatio..
An electron is released from rest at x=0 in a region where the electric field is . Find the speed of the electron when x = 2.5 cm
How does the speed v1 of a swimmer reaching the end of slide 1 compare with v2, the speed of a sqimmer reaching the end of slide 2.
A sinusoidal wave travels along a stretched string. A particle on the string has a maximum velocity of 1.30m/s and a maximum acceleration of 250m/s2. What is the frequency of the wave
two capacitors c1 6.00 microf and c2 14.0 microf are connected in parallel and the resulting combination is connected
A 1550 kg car drives around a flat 200 m diameter circular track at 30 m/s. What is the magnitude and direction of the net force on the car
A flat-bottomed barge, loaded with coal, has a mass of 2.8 105 kg. The barge is 19.8 m long and 9.7 m wide. It floats in freshwater. What is the depth of the barge below the waterline
you are trying to determine the wavelength of a particular line of a samples emission spectrum using a diffraction
The figure shows two connected wires that are made of the same material. The current entering the wire on the left is 2.0 A, and in that wire the electron drift speed is Vd. What is the electron drift speed in the wire on the right side?
a spring is hanging vertically from a ceiling. assume the springs mass is negligible. i hang a 0.5kg mass on the spring
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