Engineering, 04.02.2021 22:40 marieroberts7148
Ethan is observing and measuring the properties of a substance. He heats the substance and observes that the substance turns from a brown solid to a black powder. He then measures the properties of the black powder
and compares them to the properties of the brown solid. He finds that the properties of the brown solid and black powder are different. Which option below best summarizes Ethan's observation?
The brown solid changed color and size when he added heat, which means he observed a physical change.
The brown solid became a new substance when he added heat, which means he observed a physical change.
The brown solid became a new substance when he added heat, which means he observed a chemical change.
O The brown solid changed color when he added heat, which means matter was destroyed by a chemical change.
Answers: 1
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Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.
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Engineering, 04.07.2019 18:10
Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1
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Ethan is observing and measuring the properties of a substance. He heats the substance and observes...
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