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An unknown substance has a mass of 0.125 kg and an initial temperature of 77.5°C. The substance is then dropped into a calorimeter made of aluminum containing 0.285 kg of water initially at 28.8°C. The mass of the aluminum container is 0.150 kg, and the temperature of the calorimeter increases to a final equilibrium temperature of 32.0°C. Assuming no thermal energy is transferred to the environment, calculate the specific heat of the unknown substance.
J/kg·°C
At 25C, the resistance of a segment of gold wire is 61 ohm. When the wire is placed in a liquid bath, the resistance increases to 199ohm ?. What is the temperature of the bath
There are two capacitors of capacitance 5.0uF and 8.0uF are connected in series. Find the equivalent capacitance of the network and the charge on each plate of the capacitors
At what rate is the flywheel spinning while the power comes back on. How long after the beginning of the power failure would it have taken the flywheel to stop if the power had not come back on.
In a local bar, a customer slides an empty beer mug down the counter for a refill. The height of the counter is 1.16 m. find With what velocity did the mug leave the counter
how much work is required to place q3 at (0,-3)? D) Calculate the electric potential energy of the group of three charges.
A certain camera has f-numbers that range from 1.1 to 28. If the focal length of the lens is 40 mm, what is the range of aperture diameters for the camera
a uniform, upward electric field of magnitude 1.60 x 103 N/C has been set up between two horizontal plates by charging the lower plate positively and the upper plate negatively. How far horizontally from the left edge will the electron strike
A block is on a plane inclined at 75 degrees with a coefficient of static friction of 0.1. what is the minimum necessary magnitude of the force to keep it stationary
a block is being moved up a 60.0deg incline as shown in the figure above. the block has a mass of 16.0 kg. the block is
a metal airplane flies horizontally at 200. m/s where the Earth's magnetic fiels is vertical and is 45.0uT. If the wingspan is 25.0 meters. what emf is induced across the wings
A particle has a charge of 600 o C and a mass of 0.6 nkg. This particle is placed in a uniform electric field of 1,200 N/C. Find the a) electrostatic force acting on the mass. If the particle is free from rest what is its acceleration.
question1a solenoidal coil with 26 turns of wire is wound strongly around another coil with 330 turns. the inner
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