Description : During hot weather, the fan produces a feeling of comfort. This is because – (1) fan supplies cool air (2) fan cools the air (3) our perspiration evaporates rapidly (4) conductivity of air increases
Last Answer : (3) our perspiration evaporates rapidly Explanation: Fans make the air more comfortable for two reasons: (1) by moving the air, they blow away body heat and evaporate sweat, cooling the body, and (2) they also mix the cooler air near the floor with the warmer air by people's faces.
Description : A fan produces a feeling of comfort during hot weather. Why?
Last Answer : – Our perspiration evaporates rapidly
Description : A fan produces a feeling of comfort during hot weather. Why? -Do You Know?
Last Answer : answer:
Last Answer : Our perspiration evaporates rapidly
Description : We feel cool when we sit near the fan, this is because – (1) fan gives cool air. (2) an cools surrounding air. (3) air vapourises the sweat on our body. (4) we feel cool when air touches the body.
Last Answer : (3) air vapourises the sweat on our body. Explanation: We feel comfortable sitting under a fan when we are perspiring because a fan increases the rate of evaporation of sweat (or moisture) from our body and makes us feel cool and comfortable.
Description : We feel cool when we sit near the fan, this is because (1) fan gives cool air. (2) fan cools surrounding air. (3) air vapourises the sweat on our body. (4) we feel cool when air touches the body.
Last Answer : air vapourises the sweat on our body.
Description : The basic underlying principle of using a mist propagation system is that it: a. Keeps the propagation medium uniformly moist and supplies moisture to the base of the cuttings b. ... medium to promote root formation and development d. Increases humidity around the cutting and reduces transpiration
Last Answer : Increases humidity around the cutting and reduces transpiration
Description : During summer, we feel comfortable under a fan because it (a) throws cool air on us (b) sets the air in motion, thereby increasing the evaporation of sweat (c) produces convection currents (d) produces air which carries heat away from the body
Last Answer : Ans:(b)
Description : The water in an open pond remains cool even in hot summer because (a) Of continuous evaporation of water (b) Water radiates heat more rapidly than the atmosphere (c) Water absorbs heat less rapidly than the atmosphere (d) Water absorbs heat more rapidly than the atmosphere
Last Answer : Ans:(c)
Description : If a crystal cools rapidly it will?
Last Answer : small
Description : A hot air balloon has a volume of 2800 m^3 at 99°C. What is the volume if the air cools to 80°C?
Last Answer : A hot air balloon has a volume of 2800 m3 at 99°C. What is the volume if the air cools to 80°C?
Description : When air is warm, it rises and leaves an area of low pressure which becomes filled with sinking cold air. After a hot, sunny day, the land cools faster than the sea. What is likely to happen after a hot, sunny day on the sea shore?
Last Answer : When air is warm, it rises and leaves an area of low pressure which becomes filled with sinking cold air. After a hot, sunny day, the land cools faster than the sea. What is likely to happen after a hot, sunny day on the sea shore?
Description : The first step in the generation of a sea breeze is . (a) air over land expands and builds a pressure gradient at the surface that pushes air offshore (b) air over land expands and builds ... forms a cloud (d) air over land expands and builds a pressure gradient aloft that pushes air offshore
Last Answer : air over land expands and builds a pressure gradient aloft that pushes air offshore
Description : How to keep a room cool in hot-humid weather without air conditioning (science!)
Last Answer : I keep my windows open and use a fan,blinds lowered.
Description : When does the air cool most rapidly? Is it during w) a cloudy day x) a cloudy night y) a sunny day z) a clear night
Last Answer : ANSWER: Z -- A CLEAR NIGHT
Description : In a cup, tea cools from 90°C to 80°C in exactly one minute. It will cool from 70°C to 60°C in (a) less than one minute (b) exactly one minute (c) nearly one minute (d) more than one minute
Last Answer : Ans:(d)
Description : A body cools down from 75°C to 70°C in 10 minutes. It will cool down from 70° C to 65° C in __________ minutes. (A) 10 (B) > 10 (C) < 10 (D) Either (B) or (C), depends on the mass of the body
Last Answer : (B) > 10
Description : Asthma worse in foggy weather and relieved by profuse perspiration, is seen in Options: 1) Hypericum 2) Lachesis 3) Sambucus 4) Carbo veg.
Last Answer : Correct Answer: 1) Hypericum
Description : Why is induced draught considered better than the forced draught? a) Because power requirement is high for forced draught b) Maintenance of induced draught fan is costlier c) Forced draught is less efficient d) Forced draught produces less amount of speed of air
Last Answer : Because power requirement is high for forced draught
Description : How do camels cool themselves in hot weather?
Last Answer : A: Camels have several cooling mechanisms to cope with hot weather. They can sweat to dissipate heat, but their long hair often prevents the sweat from evaporating quickly. They also regulate their body temperature by seeking shade, panting, and reducing activity during the hottest parts of the day.
Description : How warm or hot does the weather need to be before wearing Daisy Duke or booty shorts is comfortable and not too cool?
Last Answer : I walk the shores of a huge lake every day. I’ve been seeing long sleeve sweaters with bikini bottoms at the volleyball courts for a week now. It’s topping out at 60 degrees. Direct sunshine feels great, but those girls are nuts.
Description : Can you still use "Ricey Cauliflower" Had streak hot weather, then cool again.
Last Answer : Need Answer
Description : How does La-Nina affect the Pacific Ocean? (1) Decreases salinity of ocean (2) Cools downs the temperature of water (3) Maintains stable temperature of water (4) Increases salinity of ocean
Last Answer : (2) Cools downs the temperature of water Explanation: La-Nina is a climate pattern that describes the cooling of surface waters of the Pacific Ocean along the tropical west coast of South America.
Description : Consider the diurnal (daily) cycle of temperature at the surface. Why is the tem- perature maximum in the mid-to-late afternoon? (a) There is a net energy gain at the surface from dawn to mid- ... this time. (d) Late in the day, evaporation from the surface increases and this cools the surface.
Last Answer : There is a net energy gain at the surface from dawn to mid- afternoon.
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.
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
Description : Air coolers are more suitable for – (1) hot and humid climate (2) hot and dry climate (3) cool and humid climate (4) cool and dry climate
Last Answer : (2) hot and dry climate Explanation: An air cooler works on the simple principle of evaporation. It does not yield good results when humidity is high. On the contrary, the temperature of dry ... liquid water to water vapor (evaporation), which can cool air using much less energy than refrigeration.
Description : Air coolers are more suitable for (1) hot and humid climate (2) hot and dry climate (3) cool and humid climate (4) cool and dry climate
Last Answer : hot and dry climate
Description : Where can one find a portable fan (about 10" or so) that blows either warm or cool air?
Last Answer : Why does it need to blow hot air also if you need it to cool?
Description : When it's hotter than hades, and you don't have air (or your fan doesn't keep you cool), how do you sleep?
Last Answer : answer:Pretty much just like you described. We caved a few years ago and bought the window unit for the bedroom when the thermometer in our room started reading 109+. With the humidity around here, it was ... sheets with a mist of cool water or stick an ice pack in my pillow in the past, though.
Description : If electrical conductivity increases with the increase of temperature of a substance, then it is a: (1) Conductor (2) Semiconductor (3) Insulator (4) Carborator
Last Answer : (2) Semiconductor Explanation: A solid substance that has conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects
Description : If electrical conductivity increases with the increase of temperature of a substance, then it is a (1) Conductor (2) Semiconductor (3) Insulator (4) Carborator
Last Answer : (2) Semiconductor Explanation: A solid substance that has conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects.
Description : What kind of change is it when water cools to ice ?
Last Answer : When water cools, it turns into ice. This is a physical change.
Description : What happens to a liquid, when the vapour pressure equals the atmospheric pressure? (1) The liquid cools (2) The liquid boils (3) No change (4) The liquid evaporates
Last Answer : (2) The liquid boils Explanation: Ordinary evaporation is a surface phenomenon -since the vapor pressure is low and since the pressure inside the liquid is equal to atmospheric pressure plus ... pressure is equal to atmospheric pressure, bubbles form, and the vaporization becomes a volume phenomena.
Last Answer : The liquid boils
Description : Feeling the termors of an earthquake a scared resident of seventh floor of a multistoried building starts climbing down the stairs rapidly. Which horm
Last Answer : Feeling the termors of an earthquake a scared resident of seventh floor of a multistoried building ... Gastrin B. Thyroxin C. Adrenaline D. Glucagon
Description : Feeling the tremors of an earthquake a scared resident of seventh floor of a multistoryed building starts climbing down the stairs rapidly. Which hormone initiated this action? (a) Adrenaline (b) Glucagon (c) Gastrin (d) Thyroxine
Last Answer : (b) embryo sac
Description : Transpiration increases in – (1) Hot, thy and windy condition (2) Hot, damp and windy condition (3) Cool, damp and windy condition (4) Cool, dry and still condition
Last Answer : (1) Hot, thy and windy condition
Description : Transpiration increases in : (1) Hot, dry and windy condition (2) Hot, damp and windy condition (3) Cool, damp and windy condition (4) Cool, dry and still condition
Last Answer : Hot, dry and windy condition
Description : In summer, man with excess perspiration feels weak, because of the (a) Loss of more water through evaporation (b) Loss of salts through evaporation (c) Loss of carbohydrates through evaporation (d) All factors mentioned above
Description : In the process of perspiration, which part of the leaf mixes with air or water ?
Last Answer : In the process of perspiration, the air in the leaves mixes with the water in the cell part.
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 : With increase in temperature, the rate of leaching increases, because the (A) Diffusivity of solute increases (B) Viscosity of solvent decreases (C) Thermal conductivity of solute increases (D) None of these
Last Answer : (A) Diffusivity of solute increases
Description : The electrical conductivity of a semiconductor increases with increase in temperature because (a) the carrier concentration increases (b) the mobility of carrier increases (c) both carrier concentration and mobility increase (d) the band gap decreases
Last Answer : The electrical conductivity of a semiconductor increases with increase in temperature because the carrier concentration increases
Description : What might happen next when an air mass cools to the point where it becomes saturated?
Last Answer : Precipitation
Description : Woollens keep us warm in winter because they (a) produce more warmth (b) are good absorbers of heat (c) do not allow our body heat to escape (d) do not allow cool air to enter
Description : Which of the following is not a property of Fluoride: A. Crosses placental barrier B. Deposits in bone C. Excretes rapidly by kidney D. Bacteria static E. Produces extrinsic tooth stain
Last Answer : E. Produces extrinsic tooth stain
Description : All of the following are properties of fluoride except: A. Crosses the placental barrier B. It deposits rapidly in bone C. It is excreted rapidly by kidneys D. It is bacteriostatic E. It produces extrinsic tooth stain
Last Answer : E. It produces extrinsic tooth stain
Description : The following statement is correct about buspirone: A. It interacts with benzodiazepine receptor as an inverse agonist B. It is a rapidly acting anxiolytic, good for panic states C. ... suppresses barbiturate withdrawal syndrome D. It has anxiolytic but no anticonvulsant or muscle relaxant propert
Last Answer : D. It has anxiolytic but no anticonvulsant or muscle relaxant property
Description : The following is true of sevoflurane except: A. It induces anaesthesia rapidly B. It is nonpungent C. It produces prolonged postanaesthetic psychomotor impairment D. It is less potent than halothane
Last Answer : C. It produces prolonged postanaesthetic psychomotor impairment