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Q: Does the temperature of a body depend on its size?
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Q: freezing
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Q: Why do we feel hot after a long period of running or doing exercise?
A: When we do running or any exercise, it will lead to increase in the muscular activity.
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Q: Microwaving your burrito is an example of what type of heat transfer?
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Q: When you exhale outdoors on a cold day, you can “see your breath.” Why?
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Living creatures generally have a higher temperature than their environment. Explain why this makes sense.
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- Snakes and other reptiles that live on land warm up in the sun. Their bodies can reach temperatures well above the ambient air temperature. But fish don’t do this. Most fish are at nearly the same temperature as the water in which they swim. How do you explain the difference?In a warm room a naked resting person has a skin temperature of 33°C if the room temperature is 29° C, what is the body surface area if the rate of heat loss due to convection is 43watt and the convection constant K =7.1 watt /m?.K Choose the right answer: 1.8m? 1.5m2 O 1.7m2Male emperor penguins spend the long Antarctic night on the ice. They keep from freezing with exquisite thermal insulation. Their insulation is so effective that the surface temperature of their feathers can actually be lower than that of the surrounding air. Explain how this is possible.
- An average car consumes about 5 L of gasoline a day, and the capacity of the fuel tank of a car is about 50 L. Therefore, a car needs to be refueled once every 10 days. Also, the density of gasoline ranges from 0.68 to 0.78 kg/L, and its lower heating value is about 44,000 kJ/kg (i.e., 44,000 kJ of heat is released when 1 kg of gasoline is completely burned). Suppose all the problems associated with the radioactivity and waste disposal of nuclear fuels are resolved, and a car is to be powered by U-235. If a new car comes equipped with 0.1-kg of the nuclear fuel U-235, determine if this car will ever need refueling under average driving conditionsAt night, the surface of the earth cools, mostly by radiation. The surface radiates energy upward; the much cooler sky above radiates much less. Patches of ground under trees can stay warmer, which is why, if you live somewhere that has cold, clear nights, you may have noticed some mornings when there is frost on open patches of ground but not under trees. Why does being under a tree keep the ground warmer?. The hottest temperature on a planet was 864°F recorded on Venus by the Soviet Venera probe and the U.S. Pioneer probe. The coldest place in the solar system is Pluto where the temperature is estimated at 1360.0°F. Calculate each of these temperatures in degrees Celsius.
- The temperature of the ocean off the coast of New Jersey ranges from about 3 °C in late winter to about 24 °C in late summer. If we assume that the ocean temperature is representative of a layer that is 25 m deep and the only exchange of energy is at the ocean surface, what is the average energy flux at ocean surface that would be required to account for this temperature change?When night falls, the temperature of the earth’s surface starts to drop. On a cool night, dew starts to form on the grass as water vapor condenses. Once dew starts to form, the rate of temperature decrease slows. Explain why this change occurs.A container of water is heated at a constant rate. The table below shows the temperature, in degrees Celsius, of the water, y, after it has been heated for a number of minutes, x. Table: Minutes of heating (x) Temperature in degrees Celsius (y) 2 54 5 99 What was the initial temperature, in degrees Celsius, of the water before it was heated? Answer Choices: a) 0 b) 24 c) 39 d) 45
- You are standing in Death Valley, California on a summer afternoon, and the temperature is well above 100 degrees. You place a piece of asphalt (Specific Heat = 0.915 J/g°C) and a piece of concrete (Specific Heat = 0.879 J/g°C) on the ground next to one another. If you were to crack an egg onto each surface, which one would be more likely to fry the egg completely? Please explain.In Miami, Florida, which has a very humid climate and numerous bodies of water nearby, it is unusual for temperatures to rise above about 38°C (100°F). In the desert climate of Phoenix, Arizona, however, temperatures rise above that almost every day in July and August. Explain how the evaporation of water helps limit high temperatures in humid climates.Global warming will result in sea level rise. Assume that i) 2/3 or the earth's surface is oceans with average depth of the oceans is 3000m ii) that sea level rise will not result in the increase in the surface area of the oceans iii) that all of the oceans' water is at a the same temperature of 20°C and has (volume) coefficient of thermal expansion of ß = 2 x 10-4 K-¹. How much will the sea level rise for a 3°C rise in the average water temperature? (You should neglects the effects from the ice caps melting due to this temperature rises.)