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What is near point of vision?
The near point of vision increases with age because the elesticity of the lens decreases as we get older.near pointthe nearest point of clear vision, the absolute near p. being that for either eye alone with accommodation relaxed, and the relative near p. that for both eyes with the employment of accommodation
Why do you grow old?
Because the cells in your body begin to get run down and produce less cells, weakening your body. This causes your heart to become less strong, which effects your whole body. Your skin cells loose elesticity causing wrinkles, showing physical signs of age along with hair that turns gray due to loss of pigment.
What are three factors that affect the speed of a sound wave in a substance?
speed of sound is affected by following factors:directly with square root of temperature in kelvinin directly with square root of densitydirectly with square root of modulus of elesticity of the medium
What is the near point of vision?
The near point of vision increases with age because the elesticity of the lens decreases as we get older.near pointthe nearest point of clear vision, the absolute near p. being that for either eye alone with accommodation relaxed, and the relative near p. that for both eyes with the employment of accommodation
What do you mean by cross demand?
Demand can be defined as the quantity of goods and services that a consumer is willing and ready to buy and at given price and at a particular period of time. Cross demand can be explain by using the knowledge of cross elasticity of demand. Hence cross demand is the same as cross elesticity of demand. Cross elasticity of demand measured the degree of responsiveness of the demand for one good due to a price change of another good. Complements goods are denoted by negative cross elasticity while substitude goods are denoted by positive elasticity. Cross demand is measured as the percentage change in demand for the first good that occurs in response to a percentage change in price of the second good. Take for instance, if, in response to a 5% increase in the price of Kerosine, the demand of new stove that are kerosine inefficient decreased by 10%, the cross elasticity of demand would be: -10% divided by 5% equal to -1
Dose sound travel better through a solid a liquid or a gas?
like with many scientific problems, you have to be careful how you ask the question! What do you mean by 'best'? Fastest? Farthest? Loudest? I'll assume you meant fastest. The speed of sound depends on both the density and the elasticity of the medium it's travelling through. Sounds travels in waves of compression and rarity, so it's fastest in solids because the molecules are packed together more tightly. Sound is next fastest in liquids, again for the same reason. It's slowest in a gas. And, in a gas, the temperature is particularly important--the faster the molecules are moving from heat, the more sound energy they can transfer to their neighbors. As far as distance travelled --- again, solids and liquids win. However, ther's an additional factor called 'damping' that depends on the elesticity of the medium the sounds waves are travelling through, also scattering. It ends up that lower-frequency sound waves can travel much longer distances than high frequency sounds....this is how whales can communicate over long distances in the ocean--and how elephants do the same in air. Both do their 'long distance' calling with low frequencies
