Description : The large collection of Stars, dust and gas held together by gravitational attraction between components is known as (1) Cluster (2) Atmosphere (3) Galaxy (4) Sun Family
Last Answer : (3) Galaxy Explanation: The term galaxy refers to a large collection of stars, dust, and gas clouds which are held together by gravitational attraction.
Description : The large collection of stars, dust and gas held together by gravitational attraction between components is known as – (1) Cluster (2) Atmosphere (3) Galaxy (4) Sun Family
Last Answer : (3) Galaxy Explanation: The term galaxy refers to a large collection of stars, dust, and has clouds which are held together by gravitational attraction. The smallest galaxies may contain only a ... largest galaxies have thousands of billions of stars. The Milky Way galaxy contains our solar system.
Description : The large collection of Stars, dust and gas held together by gravitational attraction between components is known as - (1) Cluster (2) Atmosphere (3) Galaxy (4) Sun Family
Description : Which of these is a grouping of billions of stars, gas, and dust held together by gravity?
Last Answer : galaxy
Description : The weight of a body is due to (A) Centripetal force of earth (B) Gravitational pull exerted by the earth (C) Forces experienced by body in atmosphere (D) Gravitational force of attraction towards the centre of the earth
Last Answer : (D) Gravitational force of attraction towards the centre of the earth
Description : What is responsible for holding the stars gas and dust together?
Last Answer : What is the answer ?
Description : The weight of an object at the poles is greater than at the equator. This is because (a) Of the shape of the earth (b) The attraction of the moon is maximum at the earth’s surface (c) The attraction of the sun is maximum at the earth’s surface (d) Gravitational pull is more at the poles
Last Answer : Ans:(d)
Description : What is a large cloud of dust and gas where new stars are formed called?
Last Answer : NEBULAEBecauseA diffuse mass of interstellar dust or gas or both, visible asluminous patches or areas of darkness depending on the way the massabsorbs or reflects incident radiation.;it is a clouds of gas anddust that form a star..........
Description : A small cluster of stars appear, after many decades of observation, to be converging toward a common point in the sky. Does the light from these stars show a: w) red Doppler shift x) blue Doppler shift y) no Doppler shift
Last Answer : ANSWER: W -- RED DOPPLER SHIFT
Description : Two steel balls are at a distance S from one another. As the mass of ONE of the balls is doubled, the gravitational force of attraction between them is: w) quartered x) halved y) doubled z) quadrupled
Last Answer : ANSWER: Y -- DOUBLED
Description : Name the cloud of gas and dust in which new stars form. -Space
Last Answer : Nebula is the cloud of gas and dust from which new stars form.
Description : What is a spherical cluster of stars?
Last Answer : That is called a globular cluster.
Description : Dust collection efficiency of electrostatic precipitator can be as high as 99.9%. Maximum temperature and pressure of dust laden gas that can be cleaned in an electrostatic precipitator is respectively. (A) 200°C and 5 atm (B) 1000°C and 10 atm (C) 500°C and 50 atm (D) 1000°C and 500 atm
Last Answer : (B) 1000°C and 10 atm
Description : Dust collection efficiency of a cyclone separator depends upon its (A) Diameter (B) Inlet gas velocity (C) Overall height (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Pick out the wrong statement. (A) A slight haze at the top of chimney indicates good combustion in the furnace (B) A bag filter incurs very small pressure drop and is very efficient for ... dust collection equipment for removal of submicronic dust particles present in flue gas (D) None of these
Last Answer : (B) A bag filter incurs very small pressure drop and is very efficient for removal of submicronic dust particles from flue gases at very high temperature
Description : You are sitting next to your friend on ground. Is there any gravitational force of attraction between you two?
Last Answer : You are sitting next to your friend on ground. Is there any gravitational force of attraction ... gravitational force of the earth coming in picture?
Description : What happens to the gravitational attraction between two objects if one or both objects acquires more mass?
Last Answer : As mass increases, so does the gravitational pull from theobject.
Description : Which physical phenomenon or principle is most often applied in the search for petroleum reservoirs? w) gravitational attraction x) magnetic field distortions y) natural radioactive decay of minerals z) acoustic wave transmission and reflection
Last Answer : ANSWER: Z -- ACOUSTIC WAVE TRANSMISSION AND REFLECTION
Description : When two ice cubes are pressed together, they join to form one cube. Which one of the following helps to hold them together? (1) Hydrogen bond formation (2) Vander waals forces (3) Covalent attraction (4) Dipole interaction
Last Answer : (1) Hydrogen bond formation Explanation: When two ice cubes are pressed together, they join to form one cube due to hydrogen bond.
Last Answer : Hydrogen bond formation
Description : Pick up the correct statement from the following: (A) The amount of water retained on the surface of soil grains by molecular attraction, is known as pellicular water (B) The degree of resistance to ... (C) The pellicular water held in any soil, is called field capacity (D) All the above
Last Answer : Answer: Option D
Description : Which characteristic of the Sun primarily determines the orbits of planets in our solar system A Large volume B Strong gravitational field C Mostly made of hydrogen D High surface temperatures?
Last Answer : B (gravity)
Description : If the distance between the earth and the sun were twice what it is now, the gravitational force exerted on the earth by the sun would be (a) twice as large as it is now (b) four times as large as it is now (c) half of what it is now (d) one-fourth of what it is now
Description : A pulsar is a rapidly spinning neutron star which emits: A. A blinding light when it aligns with the planets B. Radio waves detectable from Earth (Answer) C. A gravitational pull which attracts high energy dust particles D. Enough energy to power itself indefinitely
Last Answer : B. Radio waves detectable from Earth (Answer)
Description : Operating principle of cyclone separator is based on the action of __________ dust particles. (A) Diffusion of (B) Centrifugal force on (C) Gravitational force on (D) Electrostatic force on
Last Answer : (B) Centrifugal force on
Description : What process produces most of the energy that is radiated by the Sun? w) gravitational contraction x) chemical combustion y) nuclear fusion z) nuclear fission
Last Answer : ANSWER: Y -- NUCLEAR FUSION
Description : How can I avoid excessive dust collection?
Last Answer : You can dust your house frequently with pledge products. Also, vacuum frequently to rid your house of pet hair, one of the worst causes of dust.
Description : Browning of paper in old books is caused by – (1) frequent use (2) lack of aeration (3) collection of dust (4) oxidation of cellulose
Last Answer : (4) oxidation of cellulose Explanation: Foxing is a term describing the age-related spots and browning seen on vintage paper documents such as books, postage stamps, certificates, and so forth. It ... oxidation of cellulose or the effect on certain papers of the oxidation of iron, copper, etc.
Description : Which of the following dust collection equipments is the least efficient (for sub-micronic particles)? (A) Dust catcher (gravity type) (B) Cyclone separator (C) Bag filter (D) Hollow wet scrubber
Last Answer : (A) Dust catcher (gravity type)
Description : Browning of paper in old books is caused by (1) frequent use (2) lack of aeration (3) collection of dust (4) oxidation of cellulose
Last Answer : oxidation of cellulose
Description : Explain ash disposal and dust collection in a thermal power plant.
Last Answer : Ash disposal:- Various methods of disposal of ash are: Mechanical handling system. Pneumatic system. Hydraulic system Steam jet system Commonly used ash handling ... be done either manually or automatically. This removed fly ash is collected in separate container
Description : Which of the following is not caused by atmospheric refraction of light? (1) Sun appearing red at sunset (2) Twinkling of stars at night (3) Sun appearing higher in the sky than it actually is (4) Sun becoming visible two or three minutes before actual sunrise
Last Answer : (3) Sun appearing higher in the sky than it actually is Explanation: The twinkling of stars and variation in size of the Sun are due to atmospheric refraction of light. Besides, refraction is also ... higher or lower in the sky due to the changing position of the Earth relative to the Sun.
Description : Which of the following is not caused by atmospheric refraction of light ? (1) Sun appearing red at sunset (2) Twinkling of stars at night (3) Sun appearing higher in the sky than it actually is (4) Sun becoming visible two or three minutes before actual sunrise
Last Answer : Sun appearing higher in the sky than it actually is
Description : Surfacetant molecules can cluster together as micelles, which are colloid sized cluster of molecules. Micelles from only above critical micelle concen
Last Answer : Surfacetant molecules can cluster together as micelles, which are colloid sized cluster of molecules. ... . `DeltaS` of micelle formation is negative
Description : Sun also has the Hadoop Live CD ________ project, which allows running a fully functional Hadoop cluster using a live CD. a) OpenOffice.org b) OpenSolaris c) GNU d) Linux
Last Answer : OpenSolaris
Description : When two or more atoms are linked together the force holding them together is called a _____. a. charged particle b. chemical bond. c. electric attraction. d. magnetic bond.
Last Answer : b. chemical bond.
Description : In large thermal power stations very fine particulates present in flue gas are removed by (A) Wet scrubber (B) Bag filter (C) Electrostatic precipitators (D) Dust catcher
Last Answer : (C) Electrostatic precipitators
Description : In an atomic nucleus, by which force are neutrons and protons held together?
Last Answer : – Exchange forces
Description : Which of the following will give a more accurate representation of the population from which a sample has been taken? a. A large sample based on the convenience sampling technique b. A small ... simple random sampling c. A large sample based on simple random sampling d. A small cluster sample
Last Answer : c. A large sample based on simple random sampling
Description : What is the force of attraction between Moon and Sun ?
Last Answer : The "gravitational" force of gravity acts between the moon and the sun.
Description : Which of the following represents the accepted method of cleaning dust and foreign particles from electrical equipment while limiting damage to electric components? A. Carefully wiping off the components ... the components. D. Using carbon tetrachloride as a cleaning solvent to clean the components.
Last Answer : Answer: C
Description : Why does man weigh more at the poles than at the equator? (a) Because there is no atmosphere at the poles (b) Because gravitational pull is more at the poles (c) Because gravitational pull is less at the poles (d) None of the above
Last Answer : Ans:(b)
Description : Satellites burn off during re-entry to earth's atmosphere, because of the (A) Combustion with air (B) Gravitational pull by earth (C) Friction with earth's atmospherch
Last Answer : Option C
Description : Satellites burn off during re-entry to earth's atmosphere, because of the (A) Combustion with air (B) Gravitational pull by earth (C) Friction with earth's atmosphere (D) Loss in weight of the satellite
Description : Processing of which minerals release huge amount of dust in the atmosphere? 1 a) Sandstone b) Iron ore c) Limestone d) Bauxite 15. -Geography
Last Answer : C) Limestone
Description : The main cause of global climatic change is – (1) increase in the content of carbon dioxide in the atmosphere (2) emissions of industrial gases (3) adding of dust (4) changes in plant cover
Last Answer : (1) increase in the content of carbon dioxide in the atmosphere Explanation: Our ever increasing addiction to electricity from coal burning power plants eleases enormous amounts of carbon dioxide ... sources, we are highly dependent on burning coal for our personal and commercial electrical supply.
Description : Combustion of pulverised fuel (A) Requires larger combustion chamber than rich gaseous fuel (B) In a metallurgical furnace does not contaminate the product in the furnace by ash from fuel (C) Suppresses the discharge of fine dust and grit into atmosphere (D) All (A), (B) and (C)
Last Answer : (A) Requires larger combustion chamber than rich gaseous fuel
Description : The main cause of global climatic change is (1) increase in the content of carbon dioxide in the atmosphere (2) emissions of industrial gases (3) adding of dust (4) changes in plant cover
Last Answer : increase in the content of carbon dioxide in the atmosphere
Description : How many stars are in a galaxy? -Space
Last Answer : millions or billions