Choose the BEST answer to the following: When you breathe on your hand, the temperature of the exhaled air reaching your hand (a) increases. (b) decreases. (c) remains unchanged. (d) depends on how you blow.

Q: If you vigorously shake a can of chicken broth back and forth for more than a minute, will the…

A: Yes increases.

Q: Consider a cylinder with a length of 15 cm and a diameter of 10 cm. The cylinder has a surface…

A:

Q: Which contains more heat, a coffee cup of boiling water or a bathtub with water at room temperature?

A: An average size bathtub contains 250 kg of water and an average size cup contains 0.25 kg of water.…

Q: What is meant by the statement that a thermometer measures its own temperature?

A: When we insert a thermometer in any medium it comes in thermal equilibrium with the surrounding…

Q: When you blow on the back of your hand with your mouth wide open, your breath feels warm. But if you…

A: When we blow out air keeping your mouth wide open your hand feels hot because the air has the…

Q: Your friend states that the average speed of all hydrogen and nitrogen molecules in a gas is the…

A: The average speed will not be same for all hydrogen and nitrogen molecules.

Q: When the temperature changes during the day, which scale, Fahrenheit or Celsius, will have the…

A: The change in degree in both temperature scales can be found as follows.

Q: What happens to the pressure when the temperature of gas at a constant volume increases

A: When temperature of the gas at constant volume increase.... The ideal gas equation is given as…

Q: Is it the boiling of water or the higher temperature of water that cooks food faster in a pressure…

A: Food can be cooked more quickly in a pressure cooker.

Q: Two different objects receive the same amount of heat. Give at leasttwo reasons why their…

A: To determine: The reasons why the temperature changes will not be same for the two different objects…

Q: What Is the effect of temperature on most probable speed ?

A:

Q: In a mixture of hydrogen and oxygen gases at the same temperature, which molecules move faster? Why?

A: The system has two gases that is hydrogen and oxygen. The system will have constant kinetic energy…

Q: What does it mean to say that two systems are in thermal equilibrium?

A: What does it mean to say that two systems are in thermal equilibrium?

Q: Your pet cricket chirps 112 times in one minute (60.0 s). Whatis the temperature in degrees…

A: Given data: The time is: t = 60 sec The total number of chirp is: N The temperature in Fahrenheit…

Q: Why will wrapping a bottle in a wet cloth for an outing often produce a cooler bottle than placing…

A: Wrapping a bottle in a wet cloth for an outing often produces a cooler bottle than placing the…

Q: When thermal energy is removed from a system, what happens to temperature and the average kinetic…

A: Temperature is a measure of average kinetic energy of the molecules of the system. As the…

Q: Which is largest unit of heat transfer- Calorie, calorie, joule?

A:

Q: An electric fan not only doesn’t decrease the temperature of air, but it actually increases air…

A: Given:  an electric fan

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: Consider 1 kg of water that is heated from -50 °C to 120 °C. The material will have its lowest…

A: Given 1 kg of water is heated from -50 c to 120 c As we increase temperature, the density of…

Q: When you step out of a swimming pool on a hot , dry day in the southwest , you feel quite chilly.…

A: When heat flows from our body, we feel chilly.

Q: In Convective Heat Transfer the greater the motion of the the greater the heat transfer, in general,…

A: Convective heat transfer takes place in fluids due to density difference .

Q: Consider two equal-size rooms connected by an open door. One room is maintained at a higher…

A: Since rooms are identical they have same volume and since the doors are open they have same…

Q: The Eiffel tower in Paris is made primarily of iron, whose coefficient of linear expansion is about…

A: The expression to solve for the length of the tower at temperature T. LT=L01+αT-T0…

Q: Which generally expands more for an equal increase in temperature- solids or liquids?

A:

Q: A platinum ball weighing 100 g is removed from a furnace and dropped into 400 g of water at 0°C. If…

A:

Q: Why does a piece of watermelon stay cool for a longer time than sandwiches do when both are removed…

A: Given:  watermelon and sandwiches

Q: Why is it incorrect to say that, when a hot object warms a cold one, the increase in temperature of…

A: To describe Why is it incorrect to say that, when a hot object warms a cold one, the increase in…

Q: Why is it important that glass mirrors used in astronomical observatories be composed of glass with…

A: A telescope uses glasses for high precision measurements and observations, and a slight variation in…

Q: Which is greater—an increase in temperature of 1 Celsius degree or an increase of 1 Fahrenheit…

A: The relation between Celsius and Fahrenheit scale,

Q: If two objects are in thermal equilibrium, that means they have the same

A: Thermal equilibrium is the state in which heat transfer between the two object is zero. The heat…

Q: Does it necessarily mean that, when an object feels colder than another, the object has a lower…

A: The temperature is the degree of hotness or the coldness of a body.

Q: You apply a flame to 1 L of water for a certain time and its temperature rises by 2°C. If you apply…

A: Q = m C dt  Q is the heat applied  m is the mass / quantity of the material C is the specific heat…

Q: er Bridge in England has the world’s longest single span, 1410m. Calculate the change in length of…

A: GivenOriginal length of span, Lo=1410 mTemperature increases from -5.0°C to 18°C

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: You apply a flame to 2 L of water for a certain time and its temperature rises by 2°C. If you apply…

A: You apply a flame to 2 L of water for a certain time and its temperature rises by 2°C. If you apply…

Q: Does a common electric fan cool the air in the room? If not then why it is used an overly warm room?

A: A fan doesn’t cool the room but it only recirculates the air in the room and the air inside is…

Q: Which one of the following processes of heat transfer requires the presence o fluid?

A: Processes of heat transfer requires the presence fluid

Q: When you blow up a balloon, do you slightly warm the balloon? When air is allowed to rush out of it,…

A: Let us assume the gas to be ideal and the ideal gas equation reads, All the symbols have their…

Q: Which law of thermodynamics tackles the role of insulators and conductors in heat flow: zeroth,…

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…