CBSE TEST PAPER-02 CLASS - IX BIOLOGY (Improvement in food Resources) 1. Weeds affect the crop plants by – (a) Killing of plants in field before they grow. (b) Dominating the plants to grow. (c) Competing for various resources of crops (plants) (d) All the above. 2. ‘Operation Flood’ in India refers to – (a) Controlling floods during rainy season. (b) Increase in milk production by development of co-operative dairy on a large scale. (c)Increase in fish production during floods.
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Identify Laws of Motion and Thermodynamics The first example is oscillating a pendulum‚ which is categorized in the law of motion due to the object remaining in that state unless an external force is applied. The second example stating cooling food and drinks in a refrigerator is categorized in the laws of Thermodynamics due to thermalization. The third example of using the coffeemaker can be a combination of both laws due to moving touching to coffeemaker to make create an action is Law of Motion
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The Second law of thermodynamics There are four laws of thermodynamics‚ which define temperature‚ energy and entropy‚ characterizing thermodynamic systems. To understand the second law of thermodynamics we should know that on a basic level it explains the “catch twenty-twos” to the first law of thermodynamics. The first law of thermodynamics says that energy can never be created nor destroyed‚ only transferred to another form of energy. The second law states that some processes do not take place
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Fan Cart Lab We did a fan cart for our physics class the other day. To set up the lab first‚ we measured the effect of the mass of the fan cart on the acceleration of the cart. The mass of the fan cart was the independent variable and acceleration was the dependent variable. We kept the speed of the cart on medium‚ and calculated the acceleration and motion. As a result‚ we had figured out that the bigger the mass the slower the acceleration‚ as we all should have known. To calculate this we used
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Objectives: To learn about motion through studying and matching graphs of position vs. time and velocity vs. time; to develop an understanding of the concepts of kinematics. Predict‚ sketch‚ and test motion graphs to better understand motion. Equipment: Computer Vernier computer interface Logger Pro Vernier Motion Detector Meter stick Masking tape Preliminary Questions: 1a. The pink line shows the position of an object at rest with respect to
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applied force‚ on the acceleration of the cart. We will test this effect by hanging a constant mass to a cart and use a computer program‚ LoggerPro‚ to calculate the acceleration which is expressed through the slope of the graph. The cart’s initial mass is 500 grams which we change by adding more weights in order to see a difference in acceleration. Some basic background information needed for this experiment is first‚ and foremost‚ Newton’s Second Law of Motion stating: The acceleration (a) of a body
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BCA- I Physics Assignment 1 Unit I Laws of Motion 1. A man of mass 70kg stands on a weighing machine in a lift which is moving (a) upwards with a uniform speed of 10m/s. (a) downwards with a uniform acceleration of 5m/s2 . (a) upwards with a uniform acceleration of 5m/s2. What would be the readings in each case? (d)what would be the reading if lift mechanism failed and it hurtled down freely under gravity? 2. A shell of mass 0.2kg is fired by
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Isaac Newton Isaac Newton was born on December 25‚ 1642‚ in Woolsthorpe‚ England. His father died before he was born‚ and his mother mother‚ Hannah Newton‚ remarried and moved away. She left Newton to be raised by his uncle. In 1654‚ he was sent to the local grammar school‚ then he enrolled at Trinity College‚ at the University of Cambridge‚ in 1661. He received his bachelor of arts in 1665‚ and was named a fellow of the College two years later. In 1666‚ Newton made three of his greatest discoveries
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Newton’s Laws First let’s get to know some history about the man behind all of this‚ Sir Isaac Newton. Sir Isaac Newton‚ the man who is responsible for what we all have come to know as the “Laws of Motion” was born on January 4‚ 1643‚ which is very often displayed as December 25‚ 1642‚ if using the older version of the Julien calendar‚ in the Helmet of Woolsthorpe‚ England. Sir Isaac Newton is believed to be one of the most influential scientists known to have ever lived. His ideas became the basis
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sole purpose of applying the law of conservation of momentum. Is this true? I also would like to note that a graph could not be drawn in some situations again due to me lacking the technology to send photos of handwritten notes. Hence there is sadly no examples of a problem for translational equilibrium and for the force-time graph in which impulse can be identified. I also have referred to explosions as divisions. Is this appropriate? Newton’s First Law of Motion: A body will remain
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