Discuss why wearing more layers of clothing during winter keeps us warmer than wearing just one thick piece of clothing.

Q: Loose-fitting white clothing covering most of the body, shown below, is ideal for desert dwellers,…

A: In desert the climate during day is sunny hot while during night it is cold. The speed of the air is…

Q: Even though metal is a good conductor, frost can be seen on parked cars in the early morning even…

A: The radiation from the Sun will be absent early in the morning. Therefore, the surrounding…

Q: Why will wrapping a bottle in a wet cloth at a picnic often produce a cooler bottle than placing the…

A: When a bottle is kept in a bucket of cold water, the bottle is being cooled by the process called…

Q: What happens to the amount of 'microscopic slush' in cold water when its temperature is increased?

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: Consider laminar forced convection in a circular tube. Will the heat flux be higher near the inlet…

A: In general, the heat transfer coefficient and wall shear stresses are higher at the region where the…

Q: On a chilly 10°C day, your friend who loves cold weather says she wishes it were twice as cold.…

A: Here, 10°C in Kelvin = 10+273 = 283 K         -131.5°C in Kelvin = -131.5+273 = 141.5 K

Q: When you open the door to an air conditioned room in the summer are you letting cold air out or hot…

A: When the door to an air conditioned room in the summer is opened.   And we need to tell whether we…

Q: If you leave a metal spoon propped up in a pot Is this Conduction, convection, or radiation

A: Conduction is transfer of heat energy through one medium to another through contact.

Q: Which represents a greater change in temperature: an increase of 1°C. 1'F, or 1 K?

A: Comparatively, the 1 degree rise in the Celsius is hotter than 1 degree rise in Fahrenheit as 1…

Q: Why does blowing over hot soup cool the soup?

A: Evaporation causes cooling of liquid as highly energetic molecules get wiped off the surface when…

Q: If the specific heat capacity of water were less, would a nice hot bath be a longer or shorter…

A: The formula of the specific heat:

Q: Why do woolen blankets keep us warm better than cotton sheets?

A: In the woolen blanket, there are more gaps. So, more air are confined within woolen blanket. Air is…

Q: At what common temperature would a block of wood and a block of metal feel equally cold or equally…

A: for any object feel equal cold or equal hot when it is touched since the temperature of any object…

Q: Mention four properties of thermal radiation?

A: If a body emits thermal radiation, at any temperature, it consists of wide range of frequencies. To…

Q: Consider laminar natural convection from a vertical hot-plate. Will the heat flux be higher at the…

A:

Q: How can devices that heat homes in winter also be used to cool homes in summer?

A: A heat pump pumps heat from the colder environment to the warmer one. During winter, the pump moves…

Q: Is metal a good heat shield?

A: heat shield means the protection form heat

Q: Why is it difficult to make mercury enter a fine thermometer tube?

A: Since the cohesive forces between the molecules of mercury are very large as compared to adhesive…

Q: Why does the water in a car radiator sometimes boil explosively when the radiator cap is removed?

A:

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 white or light coloured clothes in summer and dark coloured clothes in winter?

A: White or light coloured clothes reflects light, which is reflects heat. So it helps to possess our…

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: Does a body at 0 degree C radiate any heat?

A:

Q: If you wish to save fuel and you’re going to leave your warm house for a half hour or so on a very…

A: Answer : Turn it off altogether

Q: Why is being burned by steam more damaging than being burned by water at the same temperature (100…

A: when the state of any matter changes from one state to another state  its temperature when the state…

Q: Woolen clothes are worn in winter, Why?

A: Woollen clothes are worn in winter, because air is a poor conductor of heat.

Q: Make a contrast between a boot that is chilly and a boot that is warm.

A: We have to find the difference between a chill boot and a warm boot.

Q: A new quilt is warmer than old one. Why?

A: The working process of quilt is to keep warm the body. Quilt act like a insulator it keep the air…

Q: Consider two walls of a house that are identical except that one is made of 10-cm-thick wood, while…

A:

Q: you are trying to keep your house warm in the winter. using the idea of conduction, convection, and…

A: Conduction is the transfer of energy from more energetic particles of a substance to adjacent less…

Q: a 10 kg iron is dropped onto a sidewalk from a heigh of 100m. if half of the heat generated goes…

A:

Q: Why are mittens warmer than gloves on a cold day?

A: Gloves have larger surface area than the mittens since the gloves have individual fingers. This…

Q: What does the high specific heat of water have to do with convection currents in the air at the…

A: Specific heat capacity is the amount of heat energy required to raise the temperature of unit amount…

Q: Why are heat and temperature not the same thing?

A: To explain : The difference between the heat and temperture

Q: Discuss why water can issue from deep underwater vents at temperatures of some 300°C without…

A: In hydrothermal vents, temperature of water might be as high as 300 degrees but it does not boil.

Q: Does a good insulator prevent heat from escaping , or does it simply slow its passage?

A:

Q: What is limitation of Newton's cooling law?

A: The limitation s of the newtons cooling law are as follows:1. The difference of temperature between…

Q: How does a fan help us feel cooler in the summer?

A: Given fan help us feel cooler in the summer we have to find the cause of the above mentioned…

Q: If you wish to warm 50 kg of water by 20°C for your bath, show that the amount of heat needed is…

A:

Q: Why must the mercury bulb of the thermometer not touch the wall or base of the beaker when measuring…

A: Mercury thermometer is a temperature measuring device which is made of a mercury bulb which is…

Q: Why is it important to protect water pipes in the winter so that they don’t freeze?

A: Given:  water pipes