Why fragant perfum will be holding smell longer in colder temperaturate more than hot temperature?

Q: what is meant by optimal temperature ?

A: Optimum temperature: The temperature at which an enzyme shows its highest activity is called optimum…

Q: What is the identity of a 100g sample of metal that, upon absorbing 900 J of heat, increases in…

A: Using the equation for the heat required to increase the temperature, Q=mc∆Tc=Qm∆T

Q: The lowest temperature at which a liquid fuel producesenough vapor to burn is the ___________

A: Flash point, the lowest temperature at which  a liquid will form a vapor in the air that will…

Q: How does specific heat of metal compare to that of water?

A: The expression to determine the specific heat will be,

Q: What properties of metal make them conduct heat better than wood?

A: A metal is a good conductor of heat whereas a wood is a bad conductor of heat. Metals have more…

Q: Calculate the total amount of energy (in kJ) required to boil 0.2 kg of Mercury at its boiling point…

A: Mass of mercury =0.2kg latent heat of vaporisation=2.96×105Jkg-1  boiling point of mercury =+357oC

Q: involves no contact and uses only insulators. O friction O gavity O poplarization O-uduction

A: Induction charging is used to charge an object without touching the object to any other charged…

Q: What is calorimetre?

A: The device used to measure the heat in different process is known as calorimeter. The process can be…

Q: Why will spraying fruit trees with trees with water before a frost help to protect the fruit from…

A:

Q: Why does an iron ball seem to have a lower temperature than a wooden ball despite having the same…

A: iron ball seem to have a lower temperature than a wooden ball despite having the same temperature

Q: When air is quickly compressed, why does its temperature increase?

A: Explanation:

Q: Will 5 litres of kerosene oil weigh more in winter or in summer?

A: AnswerIn winter

Q: In summer cotton dresses should be preferred, Why?

A: Step 1During summers everyone tends to perspire a lot as a mechanism of our body to keep us cool.…

Q: How does the freezing point of a liquid compare with its melting point?

A: the melting point is the temperature at whcich a substance changes from the solid phase to liquid…

Q: Since all the objects emit energy to the surroundings, why don't the temperature of all the objects…

A: An object which is a good energy emitter will be also very good absorber. Such bodies are said to be…

Q: The two metallic strips that constitute some thermostats must differ in: * thickness length…

A: Thermostat are made with two different metallic strips that have different property of  linear…

Q: What causes evaporation

A: There can be many factors that can cause evaporation. Temperature of the liquid: If the temperature…

Q: When will water boil at a temperature of less than 100°C?

A: Yes, the water can boils at a temperature less than 100 degree Celsius.

Q: What property of water makes it an effective coolant?

A: To be an effective coolant, a substance has to have a high specific heat capacity, so that it can…

Q: What generally happens to the temperature of rising air and sinking air?

A: If the Air sinking down compresses air at the surface, raising temperatures near the ground. The…

Q: How does perspiration give the body a means of cooling itself?

A: To determine: How the perspiration give the body a means of cooling itslef

Q: Show that 1 cal/g · ºC =1 kcal/kg · ºC.

A: The calorie is defined as the unit of energy , which is the heat energy absorbed by water of weight…

Q: Boiling is a form of evaporation - O True O False

A:

Q: Which is more painful, burn caused by condensing steam or burn caused by boiling water at the same…

A: Given:- Which is more painful, burn caused by condensing steam or burn caused by boiling water at…

Q: What do you mean by the thermal agitation of molecules?

A: Thermal agitation of molecules can be defined as the ceaseless random motion of molecules or…

Q: What do fiberglass and snow have in common that make them good insulators?

A:

Q: Ca;culate the engergy required to raise the temperature of 2.8 kg of water from 20 degrees C to 100…

A: 2.8 kg of water from 20 degrees C to 100 degrees

Q: What happens to the temperature of water as it is boiling?

A: BOILING: Boiling is the process by which a liquid turns into a vapor when it is heated to its…

Q: If a piece of lead is hammered, it is found to be warmer.Why?

A: Every time a piece of lead is hammered, the kinetic energy of the hammer gets transferred to the…

Q: Ethyl alcohol has about one-half the specific heat capacity of water. If equal masses of each at the…

A: We heat , Heat Q = mc(dT) change in temperature dT = Q/mc Given mass (m) is same for both liquids…

Q: An ideal gas has its pressure doubled and its specific volume decreased by two-thirds. If the…

A:

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: If 100 g of a stream at 100∘C was mixed with 10 kg of ice at -100∘C, find the final temperature of…

A: Given the heat losses to the surrounding is zero. Therefore,

Q: Why does the boiling temperature of water decrease when the water is reduced under pressure, such as…

A: A substance starts boiling when the vapor pressure of the substance overcomes the ambient pressure.

Q: What will happen if a metal piece is touched with a finger in arctic cold?

A: A metal piece in artic cold will be frozen. When skin is exposed to cold weather conditions or came…

Q: What temperature gradient must exist in an aluminum rod for it to transmit 8.0 cal per second per…

A:

Q: When will water boil at the temperature of less than 100 degree C?

A: The process boiling occurs when the pressure of the atmosphere is equal to the pressure of liquid.…

Q: Are metals good thermal conduction

A: Thermal conduction is the phenomena by which the internal energy is transferred within the particles…

Q: Why is the energy is required to melt a solid?

A: Particles in solid are connected to each other by strong bonds and cannot move freely as in liquid…