Q: A Centigrade and a Fahrenheit mercury thermometer are of identical size. At what temperature will…
A:
Q: Outdoors in winter, Why does a piece of metal feel colder than piece of wood?
A: Due to the thermal conductivity of the metal, the metal feels colder than the wood.
Q: Why more viscous oil is used in motor car in summer than in winter?
A: More viscous oil is used in motor cars in summer than in winter because in summer, due to the rise…
Q: Two shirts are warmer than a single shirt of double thickness . Why?
A: Insulators are the material which is a bad conductor of heat. Air layers behave as a good insulator.
Q: Loose-fitting white clothing covering most of the body is ideal for desert dwellers, both in the hot…
A:
Q: The silica cylinder of a radiant wall heater is 60cm long and has a radius of 5mm. If it is rated…
A: Given: Length h = 60 cm or 0.6 m radius r = 5 mm or 0.005 m P = 1.5 kW or 1500 W Stefan's constant =…
Q: On a humid day, you may notice that water droplets condense on the outside of glass on cold…
A: Condensation is Define as the process where water vapor becomes liquid. During the process of the…
Q: Why is wet sand at a beach cooler to walk on than dry sand?
A: Walk on the wet sand
Q: It’s a hot day, and your apartment is rather warm. Your roommate suggests cooling off the apartment…
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Q: On a very hot day, it’s possible to cook an egg on the hood of a car. Would you select a black car…
A: Body or surface having black color have more absorbing capacity of radiation and will reflect very…
Q: When there is morning frost on the grass in an open park, why is frost unlikely to be found on the…
A: The ground beneath the bench absorbs less solar radiation compared to the open ground. The ground…
Q: Why do farmers fill their fields with water on a cold winter night?
A: Water flows through the fine capillary veins of the plants. If the temperature on a cold winter…
Q: Why does water in a metal canteen stay cooler if the clothjacket surrounding the canteen is kept…
A: Metal can is cooler
Q: If an inflated tyre bursts , the air issuing out is cold, why?
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Q: On a very cold sunny day, you wear a black coat and a transparent plastic coat. Which coat should be…
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Q: Would you expect the temperature of water at the bottom of Niagara Falls to be slightly higher than…
A: The potential energy at the top is converted into heat at the bottom. This energy is used to rise…
Q: Why should we wear cotton clothes in summer?
A: We sweat more in the summer session. Cotton is a strong water absorber helps to absorb the sweat and…
Q: Why will spraying fruit trees with trees with water before a frost help to protect the fruit from…
A:
Q: What makes the tile floor so much cooler than the bathroom mat when I walk out of the shower?
A: The thermal conductivity of tiles is greater than that of the mat. It implies that heat can be…
Q: You know that the windows in your warm house get wet on a cold day. But can moisture form on the…
A: On a cooler day, the window surface will be probably cold enough that condensation will form as the…
Q: How can an iceberg survive for several weeks floating in sea water that is above freezing point?
A: The icebergs are the part of the glaciers that is formed during calving or splitting of glaciers.…
Q: Why is it that a tub of water placed in a farmer's canning cellar helps prevent canned food from…
A: Canning cellar is a place build by the farmers to store the foods in cold winters.The water has…
Q: An electric fan not only doesn’t decrease the temperature of air, but it actually increases air…
A: Given: an electric fan
Q: After you measure the dimensions of a plot of land with a steel tape on a hot day, you return and…
A: The metal expands and contracts according to the temperature it subjected to. The metal expands if…
Q: Why do you feel uncomfortably warm on a hot and humid day?
A: We feel uncomfortably warm on a humid day because as the humidity increases the rate of evaporation…
Q: An old remedy for a pair of nested drinking glasses that stick together is to run water at different…
A: When two thinking glasses are nested together, in order to separate them, cold water flows into the…
Q: Why are cloudy nights generally warmer than clear ones?
A: Cloud is defined as dense texture of moisture molecules present in the atmosphere.
Q: Why do we wear woollen clothes in winter?
A: During winter season the human body temperature increases to the environmental temperature and heat…
Q: On a cold windy day, a window will feel colder than on an equally cold day with no wind. This is…
A: Concept: The temperature of two systems is the same when the systems are in thermal equilibrium,…
Q: A spring is made of steel and not of copper. Why?
A: A good spring should have high restoring capacity and elasticity properties and both these…
Q: The ceiling of a single-family dwelling in a cold climate should have an R-value of 30. To give such…
A: Insulation thickness The given R-value is taken in I-P units which are then converted into SI units…
Q: Explain why a marble floor appears colder than cemented floor in winter though both are at same…
A: We feel an object cold because it takes away heat from our body when we come into contact with that…
Q: What do fiberglass and snow have in common that make them good insulators?
A:
Q: The Earth cools off at night much more quickly when theweather is clear than when cloudy. Why?
A: The cooling of Earth happens predominantly by radiation.
Q: An object is undergoing a phase change of condensation. That means A. Temperature of the object…
A: B. Temperature first increases and then decreases.
Q: Which is larger, a Celsius degree or a Fahrenheit degree?
A: In the Celcius scale, the scaling is form 0° C to 100°C to while in Fahrenheit scaling is from 32°F…
Q: In warm regions where tropical plants grow but the temperature may drop below freezing a few times…
A: In winters when the temperature may drop below freezing point a few times in tropical regions, the…
Q: A 7.0 Kg of glass bowl (clas= 840 J/Kg C°) contains 16.0 Kg of punch at 25.0°C. 2.5 Kg of ice (Ciee=…
A: Given: cglass=840 J/kg·°C, cice=2.0×103 J/kg·°Ccwater=4184 J/kg·°C, mglass=7 kgmp=16 kg, mice=2.5 kg…
Q: Woolen clothes are worn in winter, Why?
A: Woollen clothes are worn in winter, because air is a poor conductor of heat.
Q: How does a mercury thermometer work?
A: How does a mercury thermometer work?
Q: How would you know when an ice sample is already at 0ºC without using a thermometer?
A: 0oC is the only Temperature at which ice and water are found together. This temperature is known as…
Q: A common material for cushioning objects in packages is made by trapping bubbles of air between…
A: In a hot day the atmospheric pressure is higher than that inside the bubble. So, the air bubbles are…
Q: Why must an object be weighed at room temperature?
A: To explain : Why must an object be always weighed at room temperature
Q: Why is it important to protect water pipes in the winter so that they don’t freeze?
A: Given: water pipes
On a clear, cold night, why does frost tend to form on the tops, rather than the sides, of mailboxes and cars?
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- A stone floor feels very cold to bare feet in the winter but a carpet in the same room feels comfortably warm. Why?On a cold day, you grab a piece of metal and a fallen tree limb, both with bare hands. Both have been lying outside for a long time and are at the same temperature. The metal feels colder than the tree limb. Why?On a cold windy day, a window will feel colder than on an equally cold day with no wind. This is true even if no air leaks in near the window. Why?
- 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.If you hold one end of a metal bar against a piece of ice, the end in your hand will soon become cold. Does cold flow from the ice to your hand? In some cases, yes. Yes No In some cases, no.To help prevent frost damage, 4.00 kg of water at 0 °C is sprayed onto a fruit tree. (a) How much heat transfer occurs as the water freezes? (b) How much would the temperature of the 200-kg tree decrease if this amount of heat transferred from the tree? Take the specific heat to be 3.35 kJ/kg · °C , and assume that no phase change occurs in the tree.
- Fruit blossoms are permanently damaged when the temperature drops below about -4 °C, a "hard freeze." Orchard owners sometimes spray a film of water over the blossoms to protect them when a hard freeze is expected. Give a reason for the protection.One easy way to reduce heating (and cooling) costs is to add extra insulation in the attic of a house. Suppose the house already had 15.0 cm of fiberglass (glass wool) insulation in the attic and in all the exterior surfaces (including the floor of the attic room). If you added an extra 7.8100000000000005 cm of fiberglass to the attic ceiling, then by what percentage would the heating cost of the house drop? Take the room to be of dimensions 10 m by 15 m by 3.0 m. Ignore air infiltration and heat loss through windows and doors, and give your answer to one decimal place. Assume the same temperature difference between inside and outside the attic room, and that heat is lost through all six sides of the room. Hint: The cost of heating will be related to the amount of heat that is transferred through the walls, the floor and the ceiling of the attic. If let's say the heat loss is 1000 W in total (walls+floor+ceiling) without insulation, and then 800W in total with insulation, we are…The inner and outer surfaces of a 0.5-cm thick 2-m * 2-m window glass in winter are 10°C and 3°C, respectively. If the thermal conductivity of the glass is 0.78 W/m·K, determine the amount of heat loss through the glass over a period of 5 h. What would your answer be if the glass were 1 cm thick?
- In some climates, cleaning the ice off the windshield of a car is a common chore on winter mornings. Explain how ice forms on the windshield during some nights even when there is no rain or snow.A long steel I-beam used in bridge construction has a length of 15.0 m. The bear may be exposed to temperatures as low as -16°C in the winter and as high as 31°C in the summer. What is the difference in length of the beam between these two temperature extremes?A copper rod has a length of 1.9 m and a cross-sectional area of 4.4 x 10-4 m². One end of the rod is in contact with boiling water and the other with a mixture of ice and water. What is the mass of ice per second that melts? Assume that no heat is lost through the side surface of the rod.