When water is placed in ice-cube trays in a freezer, whydoesn’t the water freeze all at once when the temperature has reached0°C? In fact, the water freezes first in a layer adjacent to the sides of thetray. Why?
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A: The latent heat of fusion,
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A: Given Pvapour = 8.05. torr Tair = 35° c Tdew = 25° c
Q: brass ring of diameter 10.00 cm at 19.3°C is heated and slipped over an aluminum rod of diameter…
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A: Given that ,The change in the temperature : ∆T =1.10°CThe heat gained by the water : Qgain =…
Q: You fill an insulated mug with 360 g of coffee at 99 °C. How many grams of ice at -10 °C should you…
A: The mass of the water = 360 gramThe temperature of the coffee = 99 degree celciuscoffee's specific…
Q: (a) How much heat transfer is required to raise the temperature of a 0.750-kg aluminum pot…
A: a) The heat required is given by,
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A: The mass of a hot air balloon and its cargo m=200 kg the air outside is at a temperature-…
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Q: (a) How much heat transfer is required to raise the temperature of a 0.766-kg aluminum pot…
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Q: Indigenous peoples sometimes cooked in watertight baskets by placing enough hot rocks into the water…
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Q: heat transfer rate
A: Given: Width of plate is W=2.37 m Height of plate is H=1.17 m Heat transfer rate is Q·=123 W Initial…
Q: When builders were constructing a sidewalk they forgot to include an expansion joint between two of…
A: The length of the segments is The initial temperature is The linear expansion coefficient is The…
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A: Original length (L0) of the steel rod = 1 meter.Initial temperature (T0) of the steel rod = .Final…
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A: Given that,Melting point of mercury, Ti=234 KBoiling Point of mercury, Tf=630 KBoiling point of…
Q: much heat transfer (in kcal) is required to raise the temperature of a 0.600 kg aluminum pot…
A: Given mass of aluminium = 0.6 kg Mass of water = 3 kg Initial temperature = 10 0 C Final…
Q: A brass ring of diameter 10.00 cm at 22.3°C is heated and slipped over an aluminum rod of diameter…
A: Given Data: The diameter of brass ring is, db = 10 cm. The diameter of aluminium rod is, da = 10.01…
Q: On a cold day, Why does a metal door knob feel colder than wooden door?
A: Metal is a very good conductor of heat energy than wood. So, it conducts heat away from our hand…
Q: It’s possible to boil water by adding hot rocks to it, a technique that has been used in many…
A: Here, the heat is Q=mc∆T=5.0kg4180J/kg100°C-10°C=1881000J
When water is placed in ice-cube trays in a freezer, why
doesn’t the water freeze all at once when the temperature has reached
0°C? In fact, the water freezes first in a layer adjacent to the sides of the
tray. Why?
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- A beaker of water at room temperature is placed in an enclosure, and the air pressure in the enclosure is slowly reduced. When the air pressure is reduced sufficiently, the water begins to boil. The temperature of the water does not rise when it boils; in fact, the temperature drops slightly. Explain these phenomena.(a) Why does food cook faster in a pressure cooker?(b) Why does pasta or rice need to boil longer at high altitudes? (c) Is it harder to boil water at high altitudes?On the sea bottom at the Galapagos Rift, water heated to 350 °C gushes out of hydrothermal vents at a depth of 3000 m. Will this water boil or remain liquid at this depth? Assume the enthalpy of vaporization for water to be independent of pressure and temperature.
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- On a hot summer day, a student turns his fan on when he leaves his room in the morning. When he returns in the evening, will the room be warmer or cooler than the neighboring rooms? Why? Assume all the doors and windows are kept closed.A 1.82 m wide by 1.11 m high metal plate must be insulated to prevent contact burn injuries. If the heat transfer rate is 136 W and the temperature across the insulation must be reduced from 87.3°C to 40.3°C, what is the minimum thickness (in cm) of insulation required [round your final answer to two decimal places]? {kins = 0.031 W/m∙K}