All objects radiate energy?

Q: How does the specific heat of water compare with that of various metals? Why?

A: Specific heat can be defined as the amount of heat that is added or release from any substance to…

Q: What does thermal interaction cause?

A:

Q: How much thermal energy is released when 5 kg of a coal sample fromEmroy, Utah is burned?

A: 1 kg of coal when burnt approximately releases 30 MJ of energy. In that case, for 5 kg coal the…

Q: Standing in front of a fire, we can sense both its heat and its light. How are the light and heat…

A: Standing in front of a fire, we can sense both its heat and its light.  The light and heat radiated…

Q: A tennis ball bounces on the floor three times. If each time it loses 23.0% of its energy due to…

A: The ball loses 23% of the total energy in form of heat after every bounce. Therefore, the remaining…

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 is the front surface of a thermometer curved as shown?

A: The front surface of the thermometer is curved so as to produce a kind of magnifying effect to make…

Q: What does Radiation include?

A: One form of radiation is pure energy with no weight. This form of radiation known as electromagnetic…

Q: If the heat of fusion of water is 3.4 x 102 J/g, the amount of heat energy required to change 15.0…

A: Given that, The heat of fusion of water, H=3.4×102 J/g We need to find the amount of heat energy…

Q: If you had beeswax attached to one end of a metal skewer and you placed the other end of the skewer…

A: As it is known that the metals are the good conductor of heat

Q: If 1500J of heat is absorbed by 2kg of iron and the same amount of heat is absorbed by 2kg of water…

A: Given:Heat absorbed by iron and water = 1500 JMass of iron and water = 2 kgSpecific heat of iron =…

Q: The power radiated per square centimeters * from skin at a temperature of 20°C is 0.041 watt per…

A: Area (A) = 1 cm2= 0.0001 m2Temperature of skin (T) = 20oC = 293 kelvin

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: Why does a chunk of coal burn when ignited, whereas coal dust explodes?

A: The surface area of chunk of coal per volume is less than coal dust. More surface area per volume…

Q: This is rooted in qualitative ideas of "hot" and "cold"

A: As we know that temperature is defined as the degree of hotness and coldness of a body.So we can say…

Q: What is meant by temperature radiation?

A: When a matter having temperature greater than absolute zero, certain amount of electromagnetic waves…

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: Is there any connection between object's feeling hot or cold and its thermal conductivity?

A: Thermal conductivity is the amount of heat transferred per unit time through unit area with a…

Q: Why does ball pen ink written on paper does not spread when water is spilled on it?

A: Ink and water are immiscible liquids so they don't mix

Q: What happens to the volume of water as it is cooled from 3°C to 1°C?

A: The temperature 4° C is the special temperature of water, at which, if the water is cooled or…

Q: What are energies possessed by liquid?

A: Energies possessed by liquid in motion are:

Q: If the temperature of the surface of the object is 643.5 K. then calculate its value in F. O a…

A:

Q: Which state of matter has molecules that slide past each other but stay close together? They do not…

A: Solid, Liquid and gas are the three most common state of matter. Solid: In solid state, the…

Q: What is a thermograph?

A:

Q: 3 1 10 15 -3 -5

A: By analaysing the figure, +ve peak is the max point in Y axis, -ve peak is min point in -Y direction…

Q: Which is denser, ice at 0 °C or water at 4 °C?

A: Given: Ice at 0o C and water at 4o C The mass-to-volume ratio is related to density.

Q: What is another name of light energy?

A: The light energy is also known as electromagnetic energy because light is an electromagnetic…

Q: What happens to the temperature of the object that radiates energy without absorbing the same amount…

A: If an object radiates energy with absorbing the same amount in return, then there is no net effect…

Q: Choose the BEST answer to the following: A high-temperature source radiates relatively (a) short…

A: Step 1Let f is the frequency and T is the temperature, then it is known that

Q: Why does a body emit radiations of all wavelengths and not for a particular wavelength?

A: Wavelength – When we consider a point on a single wave, then the measurement of the distance between…

Q: Why don't atoms collapse if they are mostly empty space?

A: Atoms are not mostly empty space because there is no such thing as purely empty space. Rather, space…

Q: Why is light is pure energy?

A: The light is only a packet of energy. The photon is known as the packet of energy and in general the…

Q: Choose the BEST answer to the following: An object that absorbs energy well also (a) conducts well.…

A: Step 1A substance that absorbs energy well becomes hot by the absorption of energy.

Q: Which of these are matter? 1. atoms 2. molecules 3. energy (A) 1 only (B) 1 and 2 (C) 2 and 3 (D) 1,…

A: Matter is something which is occupying a fixed or definite amount of volume and even have a definite…

Q: We take a sample of atoms in the fundamental level. We excite the atoms until they're all in the…

A: Emission spectrum:

Q: When does Radiation occur?

A: Finding when does Radiation occur

Q: How many kilocalories are generated when the brakes are used to bring a 1200-kg car to rest from a…

A:

Q: some objects radiate thermal energy?

A: Thermal radiations are those radiations which produce in us the sensation of warmth due to of its…

Wien's displacement law

Students often get confused between Wien's displacement law and Planck's radiation law. Although both are historically related, yet they are conceptually different. Planck's law helps determine the spectrum of a blackbody, while Wien's law determines the relationship between peak wavelength and temperature.