Physics Essays

Abstract This study was undertaken to determine the relationship of different wavelengths of light and the rate of photosynthesis in spinach leafs. The rate of photosynthesis was measured every five min under light colors of white, green, red, blue and yellow under a light intensity of 2000 lux. The rate …

A calorie is a measure of energy. It is scientifically described as being the amount of energy required to raise the temperature of one gram by one degree Celsius. Calories of a food can also be recognized as a kilocalorie, or one thousand-calorie unit. In order for your body to …

The Kangaroo is an endotherm. Endotherms generate heat from their body’s metabolism. So their internal body temperature is independent of the external temperature. Endotherms eat more food than ectotherms. This higher food intake results in an increased level of metabolism, which is required to produce heat. The Red Kangaroo inhabits …

Part one 1. a) When hydrogen peroxide was added to manganese, tiny bubbles formed in the solution- intensity of (1). b)The solution did not change in temperature. c) The bubbles stopped forming after about 18 minutes. 2. After we added 2 more mL of hydrogen peroxide, the reaction occurred again. …

I. Physical Features Electric eels are not really eels, they are actually ostariophysians, but have a strong physical resemblance to true eels. . An electric eel is mostly tail. The internal organs are compressed into the anterior (front) 1/5th of the body, and the rest of the fish consists of …

Light and dark, kindness and cruelty, realism and fantasy, all of them dichotomies used by Tennessee Williams in A Streetcar Named Desire. Tennessee Williams uses many dichotomies, clear cut divisions, to illustrate main points. The most prominent dichotomy is the sweet and fragile Blanche opposed to the cruel and savage …

The Chinese proverb above was used by Adlai E.Stevenson, US ambassador to the United Nations to praise Eleanor Roosevelt after her death in 1962. Since then, many have been using this phrase to describe one’s positive actions taken when faced with difficulties or enigmas. “Don’t curse the darkness, light a …

Stress is the “wear and tear” our bodies experience as we adjust to our continually changing environment; it has physical and emotional effects on us and can create positive or negative feelings. As a positive influence, stress can help compel us to action; it can result in a new awareness …

Originally, a device known as the ‘photophone’ was used to transmit sound. This replaced Thomas .A. Edison’s ‘phonograph. Since the development of optical fibres ‘photo phones’ and ‘phonographs’ are no longer used or needed. Optical fibres have many advantages; they enable the sound messages to carry for 50km without any …

An electric generator is basically an electric motor working backwards. An electric motor converts electrical energy into mechanical energy, and an electric generator converts mechanical energy into electrical energy. An electric generator looks almost identical to an electric motor. Each consists of a loop that is able to rotate in …