Which of these describes an endothermic process? (2 points) when lithium is placed in water, the temperature of the container increases. the combustion of kerosene releases heat. when barium hydroxide is mixed with ammonium chloride, ice crystals form on the outside of the container. the reaction of trinitrotoluene with oxygen releases heat and light.
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Physics, 22.06.2019 19:50
The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.
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Physics, 22.06.2019 21:50
As microwave light travels through a liquid, it moves at a speed of 2.2 x 108 m/s. if the frequency of this light wave is 1.1 x 108 hz, what is the wavelength of this microwave?
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Physics, 23.06.2019 02:00
Explain the difference in reactivity of the elements based on their electron configurations.
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Physics, 23.06.2019 12:10
What is a transverse wave? how do the particles in the medium move in relation to the energy of the wave? does this wave require a medium?
Answers: 1
Which of these describes an endothermic process? (2 points) when lithium is placed in water, the te...
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