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A cube of ice with a mass of 150 g at a temperature of 0.0oC is placed in 750 g of water at a temperature of 25.0oC. The water and ice are in an insulating container so that no heat is lost to the environment. The water and ice eventually come to thermal equilibrium. Calculate the entropy change of the system?
A particular amplifying device supplies electrons in a manner such that the current passing out of the device, Determine the charge that passes out of the device if left on for 30 seconds
To expose photographic film, a minimum energy of 1.0 eV must be absorbed from a photon by a silver bromide molecule on the film's surface. What is the maximum wavelength of light that will expose the film?
question a metal sphere is insulated electrically and is given a charge. if 25 electrons areadded to the sphere in
A proton moving to the right at 6.2 × 105 ms-1 enters a region where there is an electric field of 62 kNC-1 directed to the left. Describe qualitatively the motion of the proton in this filed. What is the time taken by the proton to come back to the ..
What should the charge (sign and magnitude) of a 1.44-g particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 670N/C? What is the magnitude of an electric field in which the electric force on a proton ..
suppose the gas in a hot air balloon has density 0.800 kgm3. what volume must the balloon exceed in order to lift a
The concrete wall of a building is 0.0972 meter thick. The temperature inside the building is 17.8 °C, while the temperature outside is 0.0 °C. Determine what is the emissivity of the wall
The pressure fluctuation of sound waves at the closed end of a pipe vibrating at resonance is: 1. Minimum 2. 1/2 minimum 3. unchanged 4. maximum 5. 1/2 maximum
neutrons are slowed down to thermal energies in a 11 mixture of h2o and uranium 4 atom 235-u 96 atom 238-u. estimate
a 210-kg projectile fired with a speed of 142 ms at a 69.0 degrees angle breaks into three pieces of equal mass at the
How various lines per centimeter does a grating have if the third-order occurs at a 23.0 degree angle for 630-nm light.
an irregularly shaped piece of metal has a weight of 0.882 n. it is suspended from a scale which reads 0.735 n when the
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