1. Force is one which changes or tends to change the state of rest or of uniform motion of a body 2. Force is a vector quantity 3. Force SI unit is Newton 4. If we apply a force by pulling the string X the block begins to move to the right 5. If we pull the string Y the block moves to the left 6. Forces acting on an object which do not change the state of rest or of uniform motion of it are called balanced forces 7. The block moves in the direction of the greater force 8. These two opposite forces acts on an object and brings it to motion. These opposite forces are called unbalanced forces 9. The tendency of object to stay at rest or to keep moving with the same velocity unless compelled to it is acted by an external force is called inertia 10.The first law of motion is also known as the law of inertia 11.A quantity if motion was called momentum by Issac Newton 12.Who was the first to make a study of the motion of a body under the gravity of earth Galileo 13.Total momentum before collision is equal to total momentum after collision 14.Force necessary to change momentum of the objects depends on time 15.Weight is the force which a given mass feels due to the gravity at its place 16.CRYOGENICS is the study of the production of very low temperature below 123K 17.Dewar flasks are generally 6 feet tall and 3 feet in diameter 18.How many images have beeb transmitted by chandrayan camera in 75 days ? 40000 19.Liquid heliun can reduce the temperature of the coil to around 4K 20.Forces acting aon an obfect which do not change the state of rest is balanced force 21.Momentum of an object is defined as the product of mass and velocity
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22.Who conducted in absence of air all bodies will fall at the same rate Galileo 23.The commercial cryogenic processing industry was founded by Ed busch 24.Chandrayan-1 carried 6 payloads from other space agencies 25.For every action there is an equal and opposite reaction 26.When the force rotates the body in clockwise direction then it is anticlockwise momentum 27.Who concluded that all objects in the universe attracts each other ? newton 28.Mass is the quantity of matter contained in a body 29.Weight is the gravitational force acting on a body 30.Acceleration due to gravity g is 9.8 ms-2 31.Who was the project direction of chandrayan -1 and chandrayan -2 mylsamy annadurai 32.Chandrayaan-1 was Indians first unmanned lunar probe 33.How many ISRO payloads did chandrayaan-1 carried ? 5 34.Bulgarian payload called radiation dose monitor 35.Liquid nitrogen is the most commonly used element in cryogenics 36.Liquid nitrogen is geld in special container called Dewar flasks 37.Metals frozen to low temperature shared resistance to wear and tear is known as cryogenic hardening 38.MRI is used to scan inner organs of human body by penetrating very intense magnetic field 39.Space stations is an artificial structure designed for humans to live and work in the outer space for a certain period time 40.The field of cryogenics advanced during world war-II 41.The commercial cryogenic founded in 1966 42.Cryogenics use Kelvin scale of temperature 43.Inertia of a body depends mainly upon mass 44.Momentum direction is same as that of velocity 45.Liquid hydrogen has been used as rocket fuel 46.The term cryogenic derived from greek 47.A person studies elements under extremely cold temperature is called cryogencist
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48.Chandrayaan-1 operated for 312 days 49.Chandrayaan-1 was launched on October 2008 50.Chandrayaan-1 was launched from srihari kota 51.The unit of momentum of force is Nm 52.Give an example for space stations almaz 53.The last military used space station Salyut-5 54.Salyut-5 was launched by soviet union 55.Which cryogen used in MRI scan ? liquid helium 56.Chandrayan’s moon mineralogy mapper has confirmed that moon was once completely molten 57.Chandrayaan -1 is a moon traveler 58.Mass is measured using spring balance 59.Weight is measured in newton 60.The SI unit of force is kg 61.SI unit of force is vector 62.Force changes the state of rest 63.Terrain mapping camera of chandrayaan-1 acquired of peaks and craters is moon 64.Space stations are used to study the effects of long duration space flight on the human body 65.The space stations so far launches are broadly classified into how many types? Two types 66.The space stations so far launched are broadly classified into two types , Salyut and skylab were monolithic 67.The term cryogenics is form Greek and means the production of freezing cold 68.Liquified gases such as liquid nitrogen and liquid helium are used in many cryogenic applications 69.The freezing of biotechnology products vaccines requires nitrogen freezing system 70.The acceleration in a body is due to unbalanced force. T.CHANDRASEKARAN M.Sc.,M.Ed.,M.Phil., B.T ASST (SCIENCE) MODEL SCHOOL, PATTIMANIAKARANPALAYAM
Lesson 15 Science One Mark Questions Doozy Study.pdf ...
When the force rotates the body in clockwise direction then it is. anticlockwise momentum. 27.Who concluded that all objects in the universe attracts each other ?
6. In a pea plant, the yellow colour of the seed dominates over the green colour. The. genetic make up of the green colour of the seed can be shown as ______. i) GG ii) Gg iii) Yy iv) yy. 7. Some people can roll their tongue and this is a genetically
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Explain the importance of respiratory. system. Lungs are protected by double. walled membrane called-----. In lungs there are about-------. alveoli. a)200million b) ...
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