A copper cylinder with a mass of 125 g and temperature of 345°C is cooled by dropping it into a glass beaker containing 565 g of water initially at 20.0°C
The mass of the beaker is 50.0 g and the specific heat of the glass is 840 J/kg?K. What is the final equilibrium temperature of the system, assuming the cooling takes place very quickly, so that no energy is lost to the air? The specific heat of copper is 385 J/kg?K and that of water is 4190 J/kg?K.
26.4°C
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A. 0.19 kg B. 0.21 kg C. 0.26 kg D. 0.32 kg
Seafloor spreading occurs along ______________
a. fault lines b. subduction zones c. mid-ocean ridges d. none of these
The rings of Uranus are easily visible from Earth
Indicate whether the statement is true or false
A space probe approaches a planet, taking measurements as it goes
If it detects a potential difference of 6000 MV between the altitudes of 253,000 km and 276,000 km above the planet's surface, what is the approximate electric field strength produced by the planet at 264,500 km above the surface? Assume the electric field strength is approximately constant at these altitudes. A) 261 N/C B) 0.261 N/C C) 561 N/C D) 493 ?N/C