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An unknown substance has a mass of 0.125 kg and an initial temperature of 99.4°C. The substance is then dropped into a calorimeter made of aluminium containing 0.285 kg of water initially at 27.6°C. The mass of the aluminium container is0.150 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; Compute the specific heat of the unknown substance.
An infinite nonconducting sheet has a surface chargedensity σ = 0.10µC/m2 on one side. How far apart areequipotential surfaces whose potentials differ by 147 V?
During a particular thunderstorm, the electric potential between acloud and the ground is Vcloud -Vground = 2.2 x 108 V, with thecloud being at the higher potential. What is the change in anelectron's potential energy when the electron moves from th..
the gases in two identical containers are at 1 atmosphere of pressure and at room temperature. one contains helium gas
An inductor with an inductance of 2.90H and a resistor with a resistance of 6.00? are connected to the terminals of a battery with an emf of 4.00V, Find the initial potential difference across the inductor
An elevator cable breaks when a 774 kg elevator is 22.9 m above a huge spring (k = 8.00104 N/m) at the bottom of the shaft. Calculate the speed of the elevator just before striking thespring
A length of aluminum wire has a resistance of 12.0 Ω at 22.0°C. When the wire is warmed in an oven and reaches thermal equilibrium, evaluate the temperature of the oven
A student stands at the edge of a cliff and throws a stonehorizontally over the edge with a speed of 27 m/s. The cliff is 53 mabove a flat, horizontal beach as shown in the figure below. What are the coordinates of the initial position of the ston..
a string of length 1.2m vibrates in 7 loops at a frequency of 70hz. show worka. what is the wavelength?b. at what
An 18 g rifle bullet travelling 210 m/s buries itself in a 3.6 kg pendulum hanging on a 2.7 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of pendulum's displacement.
the resistance of a very fine tungsten wire with a 10 micro m x 10micro m square cross section is 2978 ohm how long is
the center of a 1.50km diameter spherical pocket of oil is 1.50km beneath the earths surface. estimate by what
A sine wave is traveling along a string. The time for a particular point to move from maximum displacement to zero is 0.880 s. What is the period?
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