Answer: Answer: Ball bearing is a device which usually converts: In the properties file, let's set the environment variable to prod.If we don't define, it will default to the first profiles property defined in the YAML file.. A. amount of surface area of the two objects which is in contact with each other The pressure which is exerted by air around us is known as Question 69 B. 8. The static friction is always greater than sliding friction. Question 24. The force of friction acting on the car on different surfaces in increasing order will be : These materials are available at a hardware store. Answer: Answer: It internally uses JDBC api, but eliminates a lot of problems of JDBC API. Load balancing refers to efficiently distributing incoming network traffic across a group of backend servers, also known as a server farm or server pool.. Modern high‑traffic websites must serve hundreds of thousands, if not millions, of concurrent requests from users or clients and return the correct text, images, video, or application data, all in a fast and reliable manner. Newspaper, Towel, Dry marble floor, Wet marble floor What is drag? A book kept on the table starts sliding down. The relative computing capacity of each server is factored into determining which one has the least connections. A. static friction is greater than rolling friction C. east direction Question 44. B. Question 67 B. Question 34. The class-level annotation maps a specific request path or pattern onto a controller. A. it enables drawing to be made on paper Question 70 B. Answer: D. bus How to use balance in a sentence. C. Towel, Newspaper, Dry marble floor, Wet marble floor Archimedes principle is used in making (a)aeroplanes (b)fast moving trains (c) space ship (d) submarines 13. Answer: Question 29. Here you can read Chapter 12 of Class 8 Science NCERT Book. You will learn the principles of Pilates including breathing, control, precision, centering, flow, and concentration. C. B and D C. it enables rubber pads to be rubbed off Bus is not streamlined shape. Example, when we walk, friction acts in opposite direction we apply force to walk. Watch Queue Queue D. static friction is greater than sliding friction Anatomy is the study of structure while physiology is the study of function. Wheels are important because they are used for transportation. Answer: Give examples to show that friction depends on the nature of two surfaces in contact. Hairspring or balance spring – a delicate spiral spring used in watches, galvanometers, and places where electricity must be carried to partially rotating devices such as steering wheels without hindering the rotation. Answer: Question 56. Object and Class Example: main outside the class. C. streaklined shape D. west direction Enums in Switch Statements. A. rolling friction into sliding friction Explain why: SumoSprings have a wide variety of applications and are a good choice when a balance of weight support and comfort are desired. The frictional force exerted by fluids is called drag force. It acts in opposite direction of the force to stop it. The spring balance is a device which is used for measuring force acting on an object.The spring balance contains a coiled spring which gets stretched when a force is applied to its free end.The extent by which the spring get stretched is a measure of force applied. Larger the stretching of street spring ,greater will be the magnitude of force applied. A spring balance measures force. The direction of force of friction acting on this car due to surface of road is along the south direction i.e. Question 39. A. rubbing of sand paper on glazed paper Friction Class 8 Science Chapter 12 as per NCERT Book used in CBSE and other Schools. The use of tire chains is permitted in Vermont, and transportation officials may mandate the use of traction devices as weather conditions mandates. Whereas, in static friction, one object is moved over another object thus the irregularities time is more. 5.5 m (j) Objects which can move quickly through the water have a ………shape. What is meant by lubrication ? Which parts wear away first in shoes? (a) Rolling friction is the smallest in magnitude. Give an example to show that friction depends on the force with which the two surfaces are pressed together. How will you reduce friction between those machine parts which rub against each other? A. north direction When the body is in stationary state or is at rest, the frictional forces acting on the body is known as static frictional forces. A. beam balance Question 72. Hi Tulsi, the spring balance is used to measure the weight of objects. Answer: C. 5 N Instructor will demonstrate how to measure the weight of a pair of scissors with a spring scale and the students will do the same thing using their spring scales. Question 71. Other specializations of Supplier functional interface include BooleanSupplier, DoubleSupplier, LongSupplier and IntSupplier, whose return types are corresponding primitives. A. Answer: (c) Friction produces……………. D. degree of roughness of surfaces of two objects in contact with each other Question 48. In relation to the movement, we can correlate magnitude with the size and speed of the object while travelling. C. a layer of grease Answer: A. The @Bean annotation tells Spring that a method annotated with @Bean will return an object that should be registered as a bean in the Spring application context. Question 8. what are the use of spring balance. Least Connections – A new request is sent to the server with the fewest current connections to clients. It must be remembered that action and reaction always act on different objects. Note: A lubricant is a substance that smoothens a surface. Use the simple money demand function to define money market equilibrium. The heels of the shoes get wear and tear first than the rest of the shoe sole. B. static friction into sliding friction Answer: Using The class Attribute. The appropriate weight to be used with each spring depends on the stiffness of spring, you will have to use your judgment to decide how much weight to use with each spring. Filed Under: Class 8, Friction Tagged With: irregularities of surface, spring balance. It decreases the friction of a surface. ECON 460 – Homework 8 SPRING 2014 – DUE IN CLASS ON JUNE 12, 2014 (PLEASE KEEP A COPY TO STUDY) 1. a. Explain with the help of a labelled diagram. Answer: 1. Record the weight of the metal bob in air. API Doc. Friction does not depend on the area of contact. I have recently migrated from C3P0 to HikariCP in a Spring and Hibernate based project and it was not as easy as I had imagined and here I am sharing my findings. B. rubbing of sand paper on glass table top Before you start with encoding and decoding JSON using Java, you need to install any of the JSON modules available. M1 Class Test Weights: The most widely used test weight available, mainly used for calibration where exact precision is not needed.All class III scales will use these. Study the spring balance, its scale and its least count. Every object has a rough surface, though the surface may appear to be smooth to the naked eyes.When we see through a microscope, it is found that the surface of all the objects have rough edges. Answer: Muscle contraction changes heart structure in such a way that blood flows. Question 27. Thus, the object is able to move easily due to less friction. A spring balance is used to measure the weights of object with the help of tension force. The weighing pan is attached at the lowest point of the spring. Heavy machines can be moved from one place to another with the help of wheels because wheels can be rolled and the amount of force is also comparatively less. Example- Air and Blood. False 12. Why? Examples: 1. Question 89. The tools/technologies used in this tutorial include (of course you can use newer versions): Spring framework 3.2.2; Spring Tool Suite IDE 3.2.0 (based on Eclipse Juno 4.2.2). Theory Density: The density of a substance is defined as the mass per unit volume,[D= ] Here, D = Density of the body M = […] Assignment no. Answer: The friction between two surfaces does not depend on one of the following. Name two common fluids. Question 14. Question 66 A. The force that opposes the motion of an object is called friction. If the static friction between two surfaces X and Y is found to be 20 N, then the rolling friction between these two surfaces should most likely be : (a) A pencil will write on paper but not on glass. This is because the paper surface offers more friction to the pencil rubber when we rub on the paper, some bits of rubber come on the paper. 75N Answer: Question 4. Also, practise the laws of liquid pressure and learn to apply it … Question 66 B. Answer: C) Density of an object D. only D The traditional scale consists of two plates or bowls suspended at equal distances from a fulcrum. GCC’s anatomy and physiology (A&P) courses explore the human body. Why do gymnasts apply a coarse substance to their hands? Du to which, the person slips down again and again. Question 30. (k) The shape of an aeroplane is similar to that of a bird in flight. Reply. C. sliding friction into rolling friction The friction depends on the roughness as well as smoothness of the surface. And when a spring balance is held horizontally, it can be used to measure the force applied to pull the object on a horizontal surface. He observed the water level till the ice melts completely in water. This is because, the heel of the shoe is interacted with the ground more than the other part and due to friction, the treads of the shoe sole wear out. The friction always opposes the motion. B. a dry lubricant Why is the surface of a slide polished to make it smooth? Java supports javax.annotation.Resource annotation using JSR-250 that is applied on component class and fields or methods of component class. The @Autowired annotation is a great way of making the need to inject a dependency in Spring explicit. Good work. v) ----- can be used to reduce friction. Which of the following will produce the maximum friction? Kabaddi players rub their hands with dry soil before playing so as to increase friction. Thus, then it is very difficult to drag the person. C. glass tumbler (b) Rough surfaces offer high friction. By rubbing our hands against each other we create friction between our hands and this friction produces heat. What is the cause of friction? Question 46. Question 17. As the roughness of the surface increases, the friction force increases. What are the factors affecting friction? True 15. NCERT Solutions for Class 8 Science Chapter 12 Friction Topics and Sub Topics in Class 8 Science Chapter 12 Friction: Section Name Topic Name 12 Friction 12.1 Force of Friction 12.2 Factors affecting Friction 12.3 Friction : A Necessary Evil 12.4 Increasing and Reducing Friction 12.5 Wheels Reduce Friction 12.6 Fluid Friction Friction Class 8 Science […] The stretching of spring or magnitude of force is … Suppose your writing table (or desk) is tilted a little. Spring Balance This type of balance utilizes Hooke's Law which states that the stress in the spring is proportional to the strain. Answer: (b) climbing a greasy pole is very difficult. A and B B. A horse can’t pull a cart without friction. A. rubbing of sand paper on glazed paper Thus, the bicycle is stopped. Because, rough offers more resistance to the other surface in contact as compared to the smooth surface. Example : Speedboat has streamlined shape. When step forward and walk, we are applying force (denoted by “F”) on the ground. What are fluids? About Spring Tool Suite IDE. This one is: C. bird Question 62. It consists of a coiled spring which gets stretched when a force is applied to it. Why do we sprinkle fine powder on carrom board? What prevents you from slipping every time you take a step forward? D. wooden cup B. a dry lubricant Goood! Whenever we push a very heavy box kept on the ground, it does not move at all because frictional force balances the force that we apply. Dynamometer is used to measure the forces acting on any object. Question 5. Answer: Up your WFH game with this balance board designed to keep you on your toes at your standing desk. The block A moves over block B only when the pulling force applied by us becomes greater than the force of friction holding them together. When a pencil cell is released from a certain point on an inclined wooden board, it travels a distance of 35 cm on floor A before it comes to rest. Question 70 A. A car is moving towards North. (d) Friction prevents our foot from slipping over the ground @SpringBootApplication Annotation @SpringBootApplication annotation is a convenience annotation introduced from Spring Boot 1.2.0.If you have worked on the earlier spring boot versions, it is common that main class always annotate with the following annotations: @Configuration: This annotation is not specific to the spring boot applications. True 11. The reading on the scale of spring balance gives us the magnitude of force.When the spring balance is held vertically, it is said to measure the weight of an object hung from its hook. Question 23. Why does a matchstick light when we strike it on a rough surface ? Pulley. A. Grooves in the soles of shoes help in increasing the friction when we walk on the roads. An aeroplane moving in the sky. Then, in this case he will have to apply more force to overcome the larger friction as in the earlier case. Why are treads made in the surface of tyres? Answer: Question 61. Its important because it reduces the friction between the parts of the machine. On this page we will provide @Resource annotation in spring. What is the direction of force of friction acting on a moving object ? The HTML class attribute is used to specify a class for an HTML element. It uses a piston valve located in the top of the boiler's steam dome, held down by a lever connected to an adjustable Chatillon spring balance. By relating this change in length to the force applied we can create a scale which enables us to … Why does a man slip when he steps on a banana peel thrown on the road? 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