1975 B1 - Class A 2kilogram block is released from rest at the top of a curved incline in the shape of a quarter of a circle of radius R. The block then slides onto a horizontal plane where it finally comes to rest 8 meters from the beginning of the plane. The curved incline is frictionless‚ but there is an 8newton force of friction on the block while it slides horizontally. Assume g = 10 meters per second2. a. Determine the magnitude of the acceleration of the block while it slides along
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Introduction: Specific gravity or relative density is the ratio of the density of a substance to the density of a given reference material. Specific gravity usually means relative density with respect to water. Temperature and pressure must be specified for both the sample and the reference. The following formula is used- Specific gravity= density of sample/density of same volume of water. Specific gravity is commonly used as a simple means of obtaining information about the concentration of solutions
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photosynthesis and the net consumption of carbon dioxide. In this experiment‚ the effects of how the intensity of light energy affected photosynthesis were observed. Two pieces of elodea was placed into separate beakers and one of the beakers was placed under a bulb of lower intensity and the other beaker being placed under a higher intensity bulb. The results showed that the beaker under the higher intensity light energy had a higher consumption of carbon dioxide when compared to the beaker that was under
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Kinetic Energy: Consider a baseball flying through the air. The ball is said to have "kinetic energy" by virtue of the fact that its in motion relative to the ground. You can see that it is has energy because it can do "work" on an object on the ground if it collides with it (either by pushing on it and/or damaging it during the collision). The formula for Kinetic energy‚ and for some of the other forms of energy described in this section will‚ is given in a later section of this primer. Potential
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Can We Really Hide From Failure? Does success and failure go hand in hand? Success gives people satisfaction and delight‚ where failure can discourage and exhaust them. But what people can tend to forget is that in life‚ everyone comes across failure every once in a while. What everyone should remember is that no one is perfect and they should not lose hope and give up. Winston Churchill once said “Success is not final‚ failure is not fatal: It is the courage to continue that counts” (Winston
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One Small Lie Can Turn Into One Big Problem In my personal experiences‚ lying does not seem very appealing. I had to learn the hard way just how much of a negative effect a simple lie can have on a person. From all of my experiences of lying and seeing lies occur‚ or hearing stories of someone lying‚ I have learned that there really is no point in lying. One small lie you tell someone could cause many different outcomes. Whether it’s just a small fabrication or a huge fallacy‚ or even if it seems
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How Mice Can Damage Your House? Have you woken up to the unnerving sounds of mice chewing your clothes‚ books or furniture at night? Mice are one of the most common animal problems that many people have to deal with in their homes. If you see mice in your home‚ it doesn’t mean that your home is dirty; it simply means that you have the food and shelter they’re looking for. Once they find their way in‚ they always cause some level of economic damage within a very short period of time. Let’s examine
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Ever since I can remember‚ I have always been fascinated with cars. I do not know what it is‚ there is just something about being able to customize and race a variety of different types of cars. Some may say that spending money on cars is a waste of money and time‚ but I think it is one of the best investments because of how long they can last‚ especially if they are taken care of. Cars that are really old and have been taken care of can still to this day sell for a substantial
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The Energy Star Program has Influenced Businesses The Energy Star program was developed by the U.S Environmental Protection Agency in 1992 due to concerns about the increasing emission of greenhouses gases. The increasing sales and use of Energy Star products have influenced manufacturers‚ retailers‚ and other businesses to produce Energy Star products and use them in their buildings. The Energy Star program has included its Energy Star logo on many products and has recently extended to cover
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7 Good Reasons to Give Back Improve Your Health and the World Around You By Leanne Beattie‚ Health & Fitness Writer According to the Giving USA Foundation‚ charitable giving in the United States reached an estimated $295 billion in 2006—a new record. The record-setting donations included $1.9 billion from Warren Buffett‚ paid as the first installment of his 20-year pledge of more than $30 billion to four different foundations. But you don’t have to be rich to make a difference. Millions of ordinary
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