Give reason: When you exert pressure on air pillow, its size gets reduced.

1 Answer

Answer :

The volume of air filled in the air pillow decreases as we increase the pressure.

Related questions

Description : Give reason: a) Soda bottles are often labelled “store in cool and dry place”. b) Balloons pops out during hot summer more frequently than in winter. c) During winter football filled with air reduces to its original size when taken outdoors.

Last Answer : a) Soda bottles are often labelled store in cool and dry place . The carbon dioxide filled in soda bottles on exposure to heat, expands because the gas inside the bottle expands as temperature ... . When football is taken out, its temperature decreases so the volume to gas filled also decreases.

Description : What happens to the volume when the temperature is reduced to one-half according to Charles’s law?

Last Answer : If the temperature is reduced to one-half, the volume would also be reduced to one-half.

Description : Why are the air bubbles smaller in size in lower layers but grows bigger as they rise up when water is boiled?

Last Answer : Lower layers of water exert a lot of pressure on air bubbles. Hence they are smaller in size. But the pressure decreases as bubbles rise to the top. Hence they grow bigger.

Description : Give reason: a) During the Bhopal gas tragedy, cockroaches, ants and mosquitoes survived. b) When there is L.P.G leakage, one is advised to open all doors and windows.

Last Answer : a) During the Bhopal gas tragedy, cockroaches, ants and mosquitoes survived. Methyl Isocyanate is a gas denser than air. Hence it was unable diffuse in the crevices. So these animals survived. b) ... diffusion of the LPG with air molecules is faster. Hence any damage by explosion can be prevented.

Description : Give reason: a) Burning of kerosene does not produce much smell but when the burning ceases, it produces strong smell. b) Smell of hot food reaches faster then that of cold food.

Last Answer : a) Burning of kerosene does not produce much smell but when the burning ceases, it produces strong smell. When kerosene is burnt, only few molecules diffuse with air after combustion. But when the ... . Smell of hot food reaches faster because rate of diffusion is faster. Cold food diffuses slowly.

Description : What happens when a balloon with little air is tied to the mouth of a bottle with hot water? Why?

Last Answer : The balloon increases in size because temperature increases kinetic energy of gas molecules of balloon. This increases the random movement of gas molecules. Hence the volume increases gradually.

Description : How are pressure, volume and mass of a gas related?

Last Answer : The product of the volume and pressure of a given mass of dry gas is a constant.

Description : What is the relationship between volume and temperature of gases when pressure is kept constant?

Last Answer : Volume of a fixed mass of gas is directly proportional to its absolute temperature.

Description : Give reasons: a) Deep sea fishes die when suddenly brought to surface.b) Scuba diver’s life is under threat when they suddenly come to the surface quickly. c) Balloons pop when squeezed. d) We feel uneasy pain in the ears during take off and landing of aeroplanes.

Last Answer : a) Deep sea fishes die when suddenly brought to surface. The pressure at the bottom of the sea is more, but the pressure at the surface is less. So due to low pressure the fish dies. ... aeroplanes. When the aeroplane takes off or lands, there is imbalance in pressure inside and outside of eardrum.

Description : Name the gas responsible for Bhopal gas tragedy.

Last Answer : Methyl Isocyanate which is produced by the chemical combination of phosgene gas and methyl cyanide.

Description : What is the relationship between rate of diffusion and mass of gas?

Last Answer : Rate of diffusion is inversely proportional to mass of gas.

Description : State Graham’s law of diffusion.

Last Answer : “The rate of diffusion of a gas is inversely proportional to the square root of its density”.

Description : What is rate of diffusion?

Last Answer : The rate of diffusion of a gas is the volume of gas diffusing per unit time.

Description : When does diffusion of gases takes place?

Last Answer : Diffusion of gases takes place when the gases do not react with one another.

Description : What is meant by diffusion?

Last Answer : The random movement of gaseous molecules from the region of higher concentration to the region of lower concentration is known as diffusion.

Description : Mention some applications of Boyle’s law in our daily life.

Last Answer : a) Deep sea fishes die when suddenly brought to surface due to low pressure. b) Scuba diver's life is under threat when they suddenly come to surface quickly. c) It is used in daily life situations ... to vehicle tyres. d) We feel pain in the ears when in an aeroplane during take off or landing.

Description : State Boyle’s law

Last Answer : “At constant temperature, the volume of a given mass of dry gas is inversely proportional to its pressure”.

Description : What happens to the volume when the temperature is doubled according to Charles’s law?

Last Answer : If the temperature is doubled, the volume would also be doubled.

Description : State Charles’s law.

Last Answer : “At constant pressure, the volume of a fixed mass of a gas is directly proportional to its absolute temperature (Kelvin)”.

Description : What is meant by absolute zero temperature?

Last Answer : The temperature -273^oC is called absolute zero or zero Kelvin.

Description : Mention the features of gases.

Last Answer : a) Gases are highly compressible. b) Gases exert pressure equally in all directions. c) Gases mix evenly in all proportions without any mechanical aid. d) Gases are least dense than other two states of matter.

Description : The strength of concrete using air entraining cement gets reduced by (a) 5 to 10% (b) 10 to 15% (c) 15 to 20% (d) 20 to 25%

Last Answer : (b) 10 to 15%

Description : Do Objects of any size exert a gravitational force.?

Last Answer : If the object having some mass then for sure it exert agravitational force.The more the mass the more will be gravity.

Description : Prime coking coal is always blended with medium or non- coking coal before carbonisation (A) To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls (B) Because, it alone produces unreactive coke (C) Both (A) and (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) and (B)

Description : How do increasing number of industries exert pressure on existing freshwater resources ? -SST 10th

Last Answer : (i) industries used water as coolant, raw material, solvent, etc. (ii) Industries release harmful chemicals which contaminates water. (iii) Most of the Indian rivers are polluted due to toxic chemicals which are released by industries.

Description : “Pressure groups and movements exert influence on politics in different ways.” -SST 10th

Last Answer : Influence of pressure groups and movements on politics: . Pressure groups and movements try to gain public support and sympathy for their goal. . They carry out information campaigns, organize meetings ... and led by the leaders of political parties. . Some political parties grow out of movements.

Description : Pressure groups and movements exert influence on politics in different ways.' Support the statement with suitable examples. -SST 10th

Last Answer : 1. The activities of pressure groups and movements try to gain public support and sympathy for their goals by carrying out information campaigns, organizing meetings, filing petitions etc. 2. They ... in a society and remind the government of the needs and concerns of the ordinary citizens.

Description : How do pressure groups and movements exert influence on politics ? Explain with examples. -SST 10th

Last Answer : Pressure groups and movements exert influence on politics by: 1. They try to get public support and sympathy for their cause and activity by filing petitions, organizing campaigns and meetings etc. ... part of the committees or official bodies that advice the government on the policy to be taken.

Description : How do pressure groups and movements exert influence on politics ? Explain any five points in this regard. -SST 10th

Last Answer : Pressure groups and movements exert influence on politics by: 1. They try to get public support and sympathy for their cause and activity by filing petitions, organising campaigns and meetings etc. 2 ... part of the committees or official bodies that advise the government on the policy to be taken.

Description : How do pressure groups and movements exert pressure on politics ? Explain with an example. -SST 10th

Last Answer : Pressure groups and movements exert pressure on politics in a variety of ways 1. They try to gain public support by influencing media and the general populace. They carry out information campaigns, ... movement that questioned all such big dams and the model of development that required such dams.

Description : Explain three ways under which pressure groups exert influence on politics. -SST 10th

Last Answer : Pressure groups, interest groups and movements attempt to influence government policies and decisions without directly controlling or sharing political power. They often tend to have their opinion ... groups also participate in official bodies and committees that offer advice to the government.

Description : In what ways do pressure groups and movements exert influence on politics ? -SST 10th

Last Answer : Pressure groups and movements exert influence in a variety of ways: a) They mostly carry out information campaigns, organizing meeting, filing petitions, etc. to gain the support of public b) ... out of movements. So the pressure groups raise the issues and influence the various political parties

Description : How do pressure groups and movements exert pressure on politics? Explain with an example. -SST 10th

Last Answer : Pressure groups and movements exert influence on politics by: 1. They try to get public support and sympathy for their cause and activity by filing petitions, organising campaigns and meetings etc. 2 ... part of the committees or official bodies that advise the government on the policy to be taken.

Description : How do pressure groups and movements exert influence on politics? Explain with examples. -SST 10th

Last Answer : Pressure groups and movements exert influence on politics in a variety of ways: (i) They try to gain public support and sympathy for their goals and their activities by carrying out information campaigns, ... the foreigners' came to an end, it led to the formation of the Asom Gana Parishad.

Description : “Pressure groups and movement exert influence on polities in a variety of ways.” Explain any four ways. -SST 10th

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Description : n assisting the client to do deep breathing, coughing and turning to the sides on the first post-operative day, which nursing action would be most helpful for the client? A. Restate ... the prescribed analgesic round the clock as prescribed D. Apply abdominal splint (pillow) while coughing

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Description : What happens when a substance gains oxygen during reaction? The substance gets – (a) Oxidised (b) Reduced (c) Both oxidized and reduced (d) None of the above

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Description : In a furnace employing forced draught as compared to induced draught, (A) Air is sucked in, so air leaks are more and hence the furnace efficiency is reduced (B) The fan operates hot and hence blades are liable to corrosion and erosion (C) Positive pressure exists in the furnace (D) None of these

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Description : In pressure supply mains, water hammer pressure is reduced by providing  (A) Sluice valves  (B) Air valves  (C) Pressure relief valves  (D) None of these 

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