Sound is heard over longer distances on rainy days because – (1) sound travels slowly in moist air (2) sound travels faster in moist air (3) moist air does not absorb sound (4) moist air absorbs sound

Sound is heard over longer distances on rainy days because – (1) sound travels slowly in moist air (2) sound travels faster in moist air (3) moist air does not absorb sound (4) moist air absorbs sound
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(2) sound travels faster in moist air Explanation: The speed of sound in a medium is inversely proportional to the square root of its density. Higher is the humidity in the air, greater will be the velocity of sound. Therefore, the speed of sound in moist air is more than that in dry air. This is why the sirens of mills, whistle of trains and others are heard up to longer distances on a rainy day than on a dry day.
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Sound is heard over longer distances on rainy days because (1) sound travels slowly in moist air (2) sound travels faster in moist air (3) moist air does not absorb sound (4) moist air absorbs sound

Description : Sound is heard over longer distances on rainy days because (1) sound travels slowly in moist air (2) sound travels faster in moist air (3) moist air does not absorb sound (4) moist air absorbs sound

Last Answer : sound travels faster in moist air

The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because - (1) the ringing is not loud enough (2) the glass of the bell jar absorbs the sound waves (3) the bell jar is too small (4) there is no air or any other gas in the bell jar

Description : The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because - (1) the ringing is not loud enough (2) the glass of the bell jar absorbs the sound waves (3) the bell jar is too small (4) there is no air or any other gas in the bell jar

Last Answer : (4) there is no air or any other gas in the bell jar

Why is the sound heard faster in the rainy season than in winter ?

Description : Why is the sound heard faster in the rainy season than in winter ?

Last Answer : Because in winter the air is dry but in the rainy season it is humid. This means that the amount of water vapor in the air is high which helps to transport sound easily.

What air pressure usually means rainy weather because moist air is rising?

Description : What air pressure usually means rainy weather because moist air is rising?

Last Answer : Need answer

Why do wet clothes dry faster in winter than rainy days ?

Description : Why do wet clothes dry faster in winter than rainy days ?

Last Answer : On a rainy day the atmosphere is saturated with water vapor. As a result, air cannot hold large amounts of water vapor. Winter air is dry. The air is waterless. This air wants to be saturated by absorbing water vapor quickly from the wet. As a result, wet clothes dry quickly in winter.

The increasing amount of CO2 in the atmosphere is slowly raising its temperature because it absorbs (a) the infrared part of the solar radiation (b) the ultraviolet part of the solar radiation (c) all the solar radiations (d) the water vapour of the air

Description : The increasing amount of CO2 in the atmosphere is slowly raising its temperature because it absorbs (a) the infrared part of the solar radiation (b) the ultraviolet part of the solar radiation (c) all the solar radiations (d) the water vapour of the air

Last Answer : Ans:(a)

(4) sodium chloride contains hygroscopic impurities like magnesium chloride Explanation: Table salt is refined salt, which contains about 97 to 99 percent sodium chloride. It usually contains substances that make it freeflowing (anticaking agents) such as sodium aluminosilicate or magnesium carbonate. Because of Hygroscopic nature of salt it become wet in rainy season as the salt absorbs moisture from environment.

Description : (4) sodium chloride contains hygroscopic impurities like magnesium chloride Explanation: Table salt is refined salt, which contains about 97 to 99 percent sodium chloride. It usually contains substances that ... of salt it become wet in rainy season as the salt absorbs moisture from environment.

Last Answer : Which of the following could be used as fuel in propellant or rockets? (1) Liquid Hydrogen + Liquid Nitrogen (2) Liquid Oxygen + Liquid Argon (3) Liquid Nitrogen + Liquid Oxygen (4) Liquid Hydrogen + Liquid Oxygen

Table salt gets moist during rainy season because (1) sodium chloride is hygroscopic (2) sodium chloride is deliquescent (3) sodium chloride contains some quantity of sodium iodide (4) sodium chloride contains hygroscopic impurities like magnesium chloride

Description : Table salt gets moist during rainy season because (1) sodium chloride is hygroscopic (2) sodium chloride is deliquescent (3) sodium chloride contains some quantity of sodium iodide (4) sodium chloride contains hygroscopic impurities like magnesium chloride

Last Answer : sodium chloride contains hygroscopic impurities like magnesium chloride

Sound travels faster in which thing?

Description : Sound travels faster in which thing?

Last Answer : – Iron than in air

Ordinary water is not used as a moderator because, it (A) Has a low absorption cross-section (B) Has a low scattering cross-section (C) Absorbs neutrons (D) Does not absorb neutrons

Description : Ordinary water is not used as a moderator because, it (A) Has a low absorption cross-section (B) Has a low scattering cross-section (C) Absorbs neutrons (D) Does not absorb neutrons

Last Answer : (C) Absorbs neutrons

The velocity of sound in moist air is more than in dry air because the moist air has (1) less density than city air (2) less pressure than dry air (3) more pressure than dry air (4) more density than dry air

Description : The velocity of sound in moist air is more than in dry air because the moist air has (1) less density than city air (2) less pressure than dry air (3) more pressure than dry air (4) more density than dry air

Last Answer : (1) less density than city air Explanation: The density of dry air is more than that of moist air (when moisture is removed from air, its density. increases). The speed of sound in a medium is inversely ... root of its density. Therefore, the speed of sound in moist air is more than that in dry air.

The velocity of sound in moist air is more than in dry air because the moist air has (1) less density than dry air. (2) less pressure than dry air. (3) more pressure than dry air. (4) more density than dry air.

Description : The velocity of sound in moist air is more than in dry air because the moist air has (1) less density than dry air. (2) less pressure than dry air. (3) more pressure than dry air. (4) more density than dry air. 

Last Answer : less density than dry air.

Light travels faster in a material with a lower refractive index. Therefore, light rays that travel a longer distance in a lower refractive index travel at a greater average velocity. What effect does this have on multimode graded-index fiber modal dispersion and bandwidth?

Description : Light travels faster in a material with a lower refractive index. Therefore, light rays that travel a longer distance in a lower refractive index travel at a greater average velocity. What effect does this have on multimode graded-index fiber modal dispersion and bandwidth?

Last Answer : Decreases the time difference between light rays, which reduces modal dispersion and increases fiber bandwidth.

Less dew is formed on cloudy nights because (a) Clouds absorb the falling dew (b) Clouds scatter moisture (c) In cloudy nights the radiation takes place very slowly (d) In cloudy nights the radiation takes place very quickly

Description : Less dew is formed on cloudy nights because (a) Clouds absorb the falling dew (b) Clouds scatter moisture (c) In cloudy nights the radiation takes place very slowly (d) In cloudy nights the radiation takes place very quickly

Last Answer : Ans:(d)

Sound travels faster in which thing? -General Knowledge

Description : Sound travels faster in which thing? -General Knowledge

Last Answer : The answer is 'Iron than in air'

Sound travels faster in which thing? -General Knowledge

Description : Sound travels faster in which thing? -General Knowledge

Last Answer : answer:

Sound travels faster in which thing? -General Knowledge

Description : Sound travels faster in which thing? -General Knowledge

Last Answer : answer:

In what medium sound travels the faster? A. Vacuum B. Solid C. Liquid D. Gas

Description : In what medium sound travels the faster? A. Vacuum B. Solid C. Liquid D. Gas

Last Answer : B. Solid

Sound travels faster in which thing?

Description : Sound travels faster in which thing?

Last Answer : Iron than in air

1. Sound travels faster in which thing? 2. Who was the first General-Secretary of the Indian National Congress? 3. From when was the Zero Base Budgeting in India first experimented? 4. Rainfall in the doldrums is of the nature of which precipitation? 5. Which first Indian leader to undergo imprisonment in 1882?

Description : 1. Sound travels faster in which thing? 2. Who was the first General-Secretary of the Indian National Congress? 3. From when was the Zero Base Budgeting in India first experimented? 4. Rainfall in ... equator found? 20. After whose name was a women's division of the Indian National Army named?

Last Answer : Answer : 1. Iron than in air 2. Dadabhai Naoroji 3. April, 1987 4. Orographic precipitation 5. C. Vijiaraghavachari 6. Bacteria, microalgae and fungi. 7. 500 8. Because of barium 9. ... By Parliamentary Act 17. Surface tension 18. Inflation 19. North of the geographical equator 20. Rani Jhansi

The velocity of sound in moist air is more than in dry air because the moist air has (1) less density than city air (2) less pressure than dry air (3) more pressure than dry air (4) more density than dry air

Description : The velocity of sound in moist air is more than in dry air because the moist air has (1) less density than city air (2) less pressure than dry air (3) more pressure than dry air (4) more density than dry air

Last Answer : (1) less density than city air Explanation: The density of dry air is more than that of moist air (when moisture is removed from air, its density. increases). The speed of sound in a medium is inversely ... root of its density. Therefore, the speed of sound in moist air is more than that in dry air.

Among the following materials sound travels fastest in – (1) Steel (2) Air (3) Vacuum (4) Water

Description : Among the following materials sound travels fastest in – (1) Steel (2) Air (3) Vacuum (4) Water

Last Answer : (1) Steel Explanation: The speed of sound is the distance travelled during a unit of time by a sound wave propagating through an elastic medium. In dry air at 20 °C (68 °F), the speed ... varies from substance to substance. Sound travels faster in liquids and non-porous solids than it does in air.

Among the following materials sound travels fastest in (1) Steel (2) Air (3) Vacuum (4) Water

Description : Among the following materials sound travels fastest in (1) Steel (2) Air (3) Vacuum (4) Water

Last Answer : Steel

A certain thing is thrown twice from a place with the gap of 45 minutes between the two shots. A girl approaching this point in a train heard the second shot 44 minutes after she heard the first shot. What is the speed of train (in kmph) if sound travels at 660 m/s? a) 62 km/hr b) 54 km/hr c) 48 km/hr d) 27 km/hr

Description : A certain thing is thrown twice from a place with the gap of 45 minutes between the two shots. A girl approaching this point in a train heard the second shot 44 minutes after she heard the first shot. What is the speed of train ... travels at 660 m/s? a) 62 km/hr b) 54 km/hr c) 48 km/hr d) 27 km/hr

Last Answer : B Actual time between the two shots being fired = 45 minutes. If a girl was stationary she would have heard the shots after 44 minutes. But since the train was moving towards the source, she heard the second shot after ... = (15 *18/5) km/hr =54 km/hr Hence the speed of the train is 54 km/hr

.As a wave travels down a spring, the amplitude slowly decreases. Why does this occur? A. The law of conservation of energy does not apply to waves. B. The energy is spread out along the entire length of the spring. C. The wave slows down as it travels along the spring. D. Some energy is lost due to friction as the particles in the spring rub against each other. E. all of the above

Description : .As a wave travels down a spring, the amplitude slowly decreases. Why does this occur? A. The law of conservation of energy does not apply to waves. B. The energy is spread out along the entire ... due to friction as the particles in the spring rub against each other. E. all of the above

Last Answer : D. Some energy is lost due to friction as the particles in the spring rub against each other.

Why can multimode graded-index fiber 1300-nm systems using LEDs operate over longer distances and at higher bandwidths than 850-nm systems?

Description : Why can multimode graded-index fiber 1300-nm systems using LEDs operate over longer distances and at higher bandwidths than 850-nm systems?

Last Answer : Longer distances and higher bandwidths are possible because fiber material losses and dispersion are significantly reduced at the 1300-nm region.

A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because– (1) Stone is heavier than parachute (2) Special mechanisms are present in parachute (3) A parachute has a larger surface area and air resistance is more (4) None of these

Description : A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because– (1) Stone is heavier than parachute (2) Special mechanisms are present in parachute (3) A parachute has a larger surface area and air resistance is more (4) None of these

Last Answer : (3) A parachute has a larger surface area and air resistance is more Explanation: Gravity is pulling the man down while friction with the air slows him down. With the parachute out it adds more ... his parachute can make his downward speed vary between about 110 mph and 225 mph-using air resistance.

A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because (1) stone is heavier than parachute (2) special mechanisms are present in parachute (3) a parachute has a larger surface area and air resistance is more (4) None of these

Description : A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because (1) stone is heavier than parachute (2) special mechanisms are present in parachute (3) a parachute has a larger surface area and air resistance is more (4) None of these

Last Answer : a parachute has a larger surface area and air resistance is more

I heard that If anything travels at the speed of light space time warps ; then what about light...

Description : I heard that If anything travels at the speed of light space time warps ; then what about light...

Last Answer : answer:Maybe in the universe you design this should be so, but it's not in the one we share. Light travels at a certain speed (in what we consider the vacuum of space-and which may not be so vacuous ... it travels at different speeds as it enters air, water, glass, etc. That's just the way it is.

The closed circulatory system is more efficient. Since blood circulates only inside blood vessels it can do it with more pressure reaching farther distances between the organs where hematosis happens and the peripheral tissues. In addition the circulatory speed also heightens making possible more oxygen supply to great consuming tissues, like the muscle tissues that then can perform faster movements. Animals with an open circulatory system (with the exception of insects that do gas exchange independently from the circulation) are generally slower and have a low metabolic rate.

Description : The closed circulatory system is more efficient. Since blood circulates only inside blood vessels it can do it with more pressure reaching farther distances between the organs where hematosis ... exchange independently from the circulation) are generally slower and have a low metabolic rate.

Last Answer : What is the difference between octopuses and mussels regarding their circulatory systems?

Sodium fluorescein: a. has a higher affinity for plasma protein than indocyanine green. b. does not leak from the choroidal vasculature. c. does not leak from normal retinal vasculature. d. emits light of longer wavelengths than the one it absorbs

Description : Sodium fluorescein: a. has a higher affinity for plasma protein than indocyanine green. b. does not leak from the choroidal vasculature. c. does not leak from normal retinal vasculature. d. emits light of longer wavelengths than the one it absorbs

Last Answer : does not leak from normal retinal vasculature.

Higher concentration of CO2 in atmosphere (A) Allows visible solar radiation (ultraviolet) of short wave-length to pass through (B) Reflects and absorbs the longer wavelength (infra-red) radiations (C) Prevents solar heat being radiated out completely, resulting in 'heat trap' i.e., global warming (D) All (A), (B) and (C)

Description : Higher concentration of CO2 in atmosphere (A) Allows visible solar radiation (ultraviolet) of short wave-length to pass through (B) Reflects and absorbs the longer wavelength (infra-red) radiations (C) Prevents solar heat being ... in 'heat trap' i.e., global warming (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

The water from a hand pump is warm in winter because - (1) our body is cold in winter and the water appears to be warm (2) the temperature inside the Earth is higher than the atmospheric temperature (3) the pumping process causes friction which warms up the water (4) inside water comes out and absorbs heat from the environment

Description : The water from a hand pump is warm in winter because - (1) our body is cold in winter and the water appears to be warm (2) the temperature inside the Earth is higher than the atmospheric ... causes friction which warms up the water (4) inside water comes out and absorbs heat from the environment

Last Answer : (2) the temperature inside the Earth is higher than the atmospheric temperature

Wollen clothes keep the body warm because – (1) Wool increases the temperature of the body (2) Wool is a had conductor (3) Wool absorbs radiant heat from outer objects (4) Wool rejects heat from the outer objects

Description : Wollen clothes keep the body warm because – (1) Wool increases the temperature of the body (2) Wool is a had conductor (3) Wool absorbs radiant heat from outer objects (4) Wool rejects heat from the outer objects

Last Answer : (2) Wool is a had conductor Explanation: It is just because woolen clothes have fibres and between those fibres air is trapped which reduces heat loss. Air reduces heat loss because it is an ... have a greater bulk than other textiles, and retain air, which causes the product to retain heat.

The water from a hand pump is warm in winter because – (1) Our body is cold in winter and the water appears to be warm (2) The temperature inside the earth is higher than the atmospheric temperature (3) The pumping process causes friction which warms up the water (4) Inside water comes out and absorbs heat from the environment

Description : The water from a hand pump is warm in winter because - (1) Our body is cold in winter and the water appears to be warm (2) The temperature inside the earth is higher than the atmospheric ... causes friction which warms up the water (4) Inside water comes out and absorbs heat from the environment

Last Answer : (2) The temperature inside the earth is higher than the atmospheric temperature Explanation: In winter, the outside temperature is lower than that of water flowing out of the pump, and therefore, the ... the outside temperature is higher than the water of the pump, and therefore, it feels cold.

The water from a hand pump is warm in winter because – (1) Our body is cold in winter and the water appears to be warm (2) The temperature inside the earth is higher than the atmospheric temperature (3) The pumping process causes friction which warms up the water (4) Inside water comes out and absorbs heat from the environment

Description : The water from a hand pump is warm in winter because - (1) Our body is cold in winter and the water appears to be warm (2) The temperature inside the earth is higher than the atmospheric ... causes friction which warms up the water (4) Inside water comes out and absorbs heat from the environment

Last Answer : (2) The temperature inside the earth is higher than the atmospheric temperature Explanation: In winter, the outside temperature is lower than that of water flowing out of the pump, and therefore, the ... the outside temperature is higher than the water of the pump, and therefore, it feels cold.

An egg sinks in soft water but floats in a concentrated solution of salt because – (1) Egg absorbs salt from the solution and expands (2) Albumin dissolves in salt solution and egg becomes lighter (3) The density of salt solution exceeds the density of eggs (4) Water has high surface tension

Description : An egg sinks in soft water but floats in a concentrated solution of salt because – (1) Egg absorbs salt from the solution and expands (2) Albumin dissolves in salt solution and egg becomes lighter (3) The density of salt solution exceeds the density of eggs (4) Water has high surface tension

Last Answer : (3) The density of salt solution exceeds the density of eggs Explanation: Following the density principle, the density of the egg compared to the density of the tap water is lesser (the density principle ... and that is why an egg sinks in soft water but floats in a concentrated solution of salt.

The water from a hand pump is warm in winter because (1) Our body is cold in winter and the water appears to be warm (2) The temperature inside the earth is higher than the atmospheric temperature (3) The pumping process causes friction which warms up the water (4) Inside water comes out and absorbs heat from the environment

Description : The water from a hand pump is warm in winter because (1) Our body is cold in winter and the water appears to be warm (2) The temperature inside the earth is higher than the atmospheric ... causes friction which warms up the water (4) Inside water comes out and absorbs heat from the environment

Last Answer : The temperature inside the earth is higher than the atmospheric temperature

An egg sinks in soft water but floats in a concentrated solution of salt because (1) egg absorbs salt from the solution and expands (2) albumin dissolves in salt solution and egg becomes lighter (3) the density of salt solution exceeds the density of eggs (4) water has high surface tension

Description : An egg sinks in soft water but floats in a concentrated solution of salt because (1) egg absorbs salt from the solution and expands (2) albumin dissolves in salt solution and egg becomes lighter (3) the density of salt solution exceeds the density of eggs (4) water has high surface tension

Last Answer : the density of salt solution exceeds the density of eggs

Wollen clothes keep the body warm because (1) Wool increases the temperature of the body (2) Wool is a bad conductor (3) Wool absorbs radiant heat from outer objects (4) Wool rejects heat from the outer objects

Description : Wollen clothes keep the body warm because (1) Wool increases the temperature of the body (2) Wool is a bad conductor (3) Wool absorbs radiant heat from outer objects (4) Wool rejects heat from the outer objects 

Last Answer :  Wool is a bad conductor

The distances of two chords AB and CD from the centre of a circle are 6 cm and 8 cm respectively. Then, which chord is longer?

Description : The distances of two chords AB and CD from the centre of a circle are 6 cm and 8 cm respectively. Then, which chord is longer?

Last Answer : The distances of two chords AB and CD from the centre of a circle are 6 cm and 8 cm respectively. Then, which chord is longer?

Which of the following is not the reason for greater susceptibility of smaller sensory fibres to blockade by local anaesthetics than larger motor fibres: A. Sensory fibres are inherently more sensitive than motor fibres B. More slender fibres have shorter internodal distances C. Small sensory fibres generate higher frequency longer lasting action potential D. Smaller fibres have shorter critical lengths for blockade

Description : Which of the following is not the reason for greater susceptibility of smaller sensory fibres to blockade by local anaesthetics than larger motor fibres: A. Sensory fibres are inherently ... higher frequency longer lasting action potential D. Smaller fibres have shorter critical lengths for blockade

Last Answer : A. Sensory fibres are inherently more sensitive than motor fibres

Why when you are high in the sky and looking from the window of an airplane, it seemed that it moves very slowly, but when starting to lose altitude to land, suddenly it feels that it moves much faster?

Description : Why when you are high in the sky and looking from the window of an airplane, it seemed that it moves very slowly, but when starting to lose altitude to land, suddenly it feels that it moves much faster?

Last Answer : The farther you are from something, the slower it appears to move. The closer you are to something, the faster it appears to move. This probably has something to do with relative frames of reference.

The Ideal Spot a. is the best performance spot of a segment. b. drifts faster than the segment. c. drifts at same pace as the segment. d. is located at the center of the segment. e. drifts more slowly than the segment.

Description : The Ideal Spot a. is the best performance spot of a segment. b. drifts faster than the segment. c. drifts at same pace as the segment. d. is located at the center of the segment. e. drifts more slowly than the segment.

Last Answer : c. drifts at same pace as the segment.

The cloudy nights are warmer compared to clear nights (without clouds) during winter days. This is because: (A) clouds radiate heat towards the earth (B) clouds prevent cold wave from the sky, descend on earth (C) clouds prevent escaping of the heat radiation from the earth (D) clouds being at great heights from earth absorb heat from the sun and send towards the earth

Description : The cloudy nights are warmer compared to clear nights (without clouds) during winter days. This is because: (A) clouds radiate heat towards the earth (B) clouds prevent cold wave from the sky, ... (D) clouds being at great heights from earth absorb heat from the sun and send towards the earth

Last Answer : (C) clouds prevent escaping of the heat radiation from the earth

Cherapunji receives more rainfall than Shillong because: (a) the former is nearer to the sea (b) the air of different densities and temperature tends to converge towards Cherapunjl from different direction during the rainy season (c) Cherapunji is located on the windward side (d) convective precipitation brings more rain at Cherapunji

Description : Cherapunji receives more rainfall than Shillong because: (a) the former is nearer to the sea (b) the air of different densities and temperature tends to converge towards Cherapunjl from ... Cherapunji is located on the windward side (d) convective precipitation brings more rain at Cherapunji

Last Answer : Ans: (b)

Is it true that Light travels faster in a material with a higher index of refraction?

Description : Is it true that Light travels faster in a material with a higher index of refraction?

Last Answer : Its False

“Light travels 18 million times faster than rain.”

Description : “Light travels 18 million times faster than rain.” 

Last Answer : It take the average raindrop 1.1. minute to reach the ground, falling at about 20 mph. 

Jackson travels a distance of 100km in 5 hrs. How much faster in kilometer per hr, on an average, must he travel to make a journey in 5/3 hr less time? a) 5 km/hr b) 10km/hr c) 6 km/hr d) 8 km/hr

Description : Jackson travels a distance of 100km in 5 hrs. How much faster in kilometer per hr, on an average, must he travel to make a journey in 5/3 hr less time? a) 5 km/hr b) 10km/hr c) 6 km/hr d) 8 km/hr

Last Answer : B Time required = (5 hrs – 5/3 hrs) =(5 hrs – 100 mints) = (5 hrs – 1hr 40 mints) = 3 hrs 20 mints = 3 1/3 hrs Required speed = (100*3/10) km/hr =30 km/hr Original speed = (100/5)km/hr = 20 km/hr Difference speed = required speed – original speed =(30-20) =10km/hr