Compare to air sound heard is more in carbon dioxide , Why?

Q: How is the boiling point of water affected when some salt is added to it?

A: When salt is added to water, there is dissociation of sodium chloride into sodium and chlorine ions.…

Q: Give evidence that the density of water does not follow that of most substances, when heated.

A: Of course, density of most matter in the earth(not to say universe) depend on temperature. Water's…

Q: When wax is coated on clothes , they become water proof. Why?

A: When there is no wax, adhesive force between cloth and water molecules is stronger than the cohesive…

Q: what is the healthiest thing to drink

A: It has been known recently that one of the healthiest thing to drink is green tea.

Q: Which element is needed and absorbed normally by your body when you are breathing?

A: Oxygen is brought into the lungs by breathing, where it is transported by red blood cells to the…

Q: Why is half frozen fruit punch always sweeter than completely melted fruit punch?

A: The sweetness depends on the concentration of the sugar.One of the main constituents of fruit is…

Q: How about an oxygen molecule?

A:

Q: Particles of camphor move around on the surface of water. Why?

A: The surface tension of water decreases when the impurities are dissolved in it. The camphor is…

Q: Does water of crystallization alter the properties of a substance?

A: Does water of crystallization alter the properties of a substance

Q: If no molecule in a body can escape, would body have any odor?

A: The odour is due to molecular diffusion, hence if the molecule could escape, the body will have…

Q: Do you find the idea that you are made of recycled atoms disturbing? Why or why not?

A: We are made of atoms that were formed on other starts and distributed across the universe.

Q: The selective absorption of electromagnetic radiationby materials (can, cannot) be used as an aid…

A: Given:The selective absorption of electromagnetic radiation by materials (can, cannot) be used as…

Q: How are side bands produced?

A:

Q: is amber and rabbit fur negatively charged

A: Basically anything in this universe is electrically neutral. i.e the sum of negative charge and…

Q: Why do you think water and oil cannot be mixed even when beated?Support your answer.

A: Molecules of oil are chargeless and they are not polar. This is the reason oil particles are more…

Q: Why do you see a lemon as yellow?

A: We have broadly classified the cones in our human eye into red, green and blue in color.

Q: Why are most of the solids crystalline in nature?

A:

Q: In 12.0 g of carbon, there are NA = 6.02 x 10^23 carbon atoms (Avogadro’s number). If you could…

A: Given: The value of Avogadro's number is 6.02x1023 atoms. The mass of carbon is 1.00 g. The rate of…

Q: the mass of air in the hail.

A: Given; The dimension of hail are,  ⇒10m×7m×5mDensity of air=1.11 kg m-3Find the mass of air in the…

Q: Which accurately represents these building blocks of matter from the smallest to largest

A: Atoms can be described as particles that are composed of nucleus and electrons. The combination of…

Q: Wet air is less dense than dry air, but wet hydrogen is more dense than dry hydrogen. explain why…

A:

Q: Tents are coated with thin layer of aluminium hydroxide. Why?

A: Tents are coated with a thin layer of aluminium hydroxide because aluminium hydroxide is insoluble…

Q: Oil spreads over surface of water whereas water doesnot spread over the surface of oil. Explain.

A: The surface tension of the water is higher than the oil. Therefore, when oil is poured over water,…

Q: Air, CO2, some plastics, water, and hand sanitizer are all transparent materials. Yet you can tell…

A: any object when interacts with light the following four phenomena can occur: 1.Specular Reflection:…

Q: Water can be sprayed easily when soap is added to it, Why?

A: Because addition of soap decreases the surface tension of water. The energy for spraying is…

Q: What are physical changes of matter

A: To define: Physical changes of matter

Q: Question: What do you notice happens? Please describe your observations in at least two sentences.

A: Given case 1 The frequency and amplitude are dropped down by 25% and 50% respectively. case 2 The…

Q: What is Insulation ?

A: Insulation is used to fill the spaces such as little gaps behind walls and above ceiling of the home…

Q: Iron has a density of 6.75 g/cm³. The volume occupied by 44.45 g of iron is

A: Introduction :  In this question we are provided with value of mass and density . with these data we…

Q: Why are the temperature and pressure dependent properties in the saturated mixture region?

A:

Q: Most car oil is 5 W – 30. What does that mean?

A: Numbers preceding W describe the viscosity of the oil at low temperatures. The lower this number,…

Q: If no molecules in a body could escape, would the body have any odor?

A:

Q: Discuss what the predominant gas is in a bubble of boiling water.

A:

Q: How do we detect the smell of an incense stick?

A: The particles of hot (after lighting it) incense stick possess large kinetic energy and diffuse in…

Q: If cose = , then tane O a 13 5

A: Cosθ=base/hyponeus

Q: Timber is an anisotropic material as it?

A: solution as

Q: Is iced water a pure substance? Why?

A:

Q: Collimated lig a. come to O b. come to C. come to O d. diverge

A:

Q: Oil rises in lamp wick, Why?

A: The oil in the wick of an oil lamp rises up due to capillary action. This effect is due to surface…

Ideal Gas Law

Ideal gas law states that the product of pressure and volume of a gas directly varies with the product of the number of moles, the universal gas constant, and the temperature of the gas.