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An unknown substance has a mass of 0.125 kg and an initial temperature of97.5°C. The substance is then dropped into a calorimeter made of aluminum containing 0.285 kg of water initially at25.1°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
The heat of fusion for water is 80. cal/g. How various calories of heat are released when 20.0 g of water at 30. °C is cooled to 0 °C and frozen to ice at 0 °C
A 28 mH inductor in series with a resistance of 35 omegacap.gif is connected to a source whose voltage is script E = 340 V cos 150?t, Determine the average power dissipation
A 16320-kg airplane lands with a speed of 89 m/s on a stationary aircraft carrier deck that is 115 m long. Find the work done by nonconservative forces in stopping the plane
Jeffery drills a very tiny hole in a sheet of brass. The hole is 0.001 inches in diameter. How large an Airy disk spot of red will form on a screen
A large boat with a weight of 70000 tons moves at constant speed due west. What is the net force on the boat
A solid cylinder is rolled down a ramp. They cylinder starts 0.29 m above the level surface below. If it starts at rest, what is the speed of the center of mass as it reaches the level surface
A rope and two masses are suspended from the ceiling of an elevator which is accelerating downward at 2.8 m/s^2. find the tension in the rope connecting the two masses
Select ALL the valid statements, i.e., B, AC, BCD. If an equation is dimensionally A) correct, the equation may be correct. B) incorrect, the equation may be correct. C) correct, the equation may be wrong. D) incorrect, the equation must be wrong...
q1. if the weight of a room full of water is so great why dont the first floors of houses built over basements all
Draw a ray diagram depicting the following: and object is 20cm in front of a concave mirror whose radius of curvature is 25cm. Calculate the image position using the mirror equation
A 600 turn solenoid is 23cm long and 1.2cm in diameter and carries 75mA. How much magnetic energy does it contain
Three charges are fixed to an x, y coordinate system. A charge of +20 µC is on the y axis at y = +3.0 m, Determine the magnitude and direction of the net electrostatic force on the charge at x= +3.0 m
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