concentrations of ozone‚ located at altitudes of 12-30 mi (19-48 km) above the earth’s surface. Ozone in the ozone layer is formed by the action of solar ultraviolet light on oxygen. The ozone layer prevents most ultraviolet (UV) and other high-energy radiation from penetrating to the earth’s surface but does allow through sufficient ultraviolet rays to support the activation of vitamin D in humans. The full radiation‚ if unhindered by this filtering effect‚ would destroy animal tissue. Higher
Premium Ozone depletion
determine which of DNA is labeled‚ half-labeled or unlabeled. To this end‚ I will use c13 label the bacteria and abruptly change carbon source with C12. Then I will collect four samples in different time and analyze the results from centrifugal by ultraviolet absorption. According to the hypothesis above‚ I design the experiment below. Firstly‚ Escherichia coli B will grow 14 generations at 36° C. with aeration in a glucose salts medium which is the only carbon source and labeled with C13. Then I
Premium DNA Bacteria Gene
have been established for the recommended purchase of a new printing press are as follows: 1. Price must not exceed our $500‚000 budget limit. 2. Press capacity must be 10‚000 impressions per hour. 3. Available options must include ultraviolet dryers‚ computer control console‚ and automatic register systems. 4. Maximum sheet size must be 52 inches. 5. Press size must be less than 6‚000 square feet and its weight no more than 15‚000 pounds. Discussion The remainder of this
Free Printing press Printing United States customary units
1. Which of the following is not one of Kepler’s Laws of planetary motion? A) As a planet orbits the sun‚ it sweeps out equal areas in equal time. B) The closer a planet is to the sun‚ the slower it moves in its orbit. C) A planet’s orbit is an ellipse‚ with the sun at one focus. D) The more distant a planet’s orbit is from the sun‚ the longer it takes to complete an orbit. Table for Individual Question Feedback Points Earned: 1.0/1.0 Correct Answer(s): B 2. What are the three
Free Solar System Sun Planet
beneficial. The ozone is a major factor that makes life possible on Earth. About 90% of the planet’s ozone is in the ozone layer. Ozone in this layer shields and filters out the Earth from 95-99 percent the sun’s ultraviolet radiation. A low level of ozone does not protect or prevent the sun’s ultraviolet rays from reaching the surface of the Earth‚ therefore‚ overexposing life on Earth causing many diseases. The depletion of the ozone is caused by many factors‚ but the one cause that will be elaborated on
Premium Ozone depletion Ozone layer Atmosphere
The electromagnetic spectrum is made up of six different types of waves. Radio waves‚ Microwaves‚ Infrared waves‚ Visible light‚ Ultraviolet light‚ X-rays and Gamma rays. The radio waves are used to transmit radio and television signals. The infrared waves are used to tell temperature of areas. Visible light is all the colors that we can see. Ultraviolet light can help things grow but to much can cause diseases such as skin cancer. X-rays are used as a tool to find broken bones or take pitchers
Premium Electromagnetic radiation Electromagnetic spectrum Light
Moles 1.How is molar mass calculated and why is it useful? You have to multiply the atomic weight of each element by the number of atoms that it contains in a compound. Molar mass is useful because its used to change a measurement of mass to an amount of a substance such as the number of particles. 2.Define a mole in chemistry and give 3 examples equivalent units that are used in chemical calculations. A mole measures the amount of a substance. Three examples that are equivalent to a mole is molar
Premium Chemistry Mole Mass
the tasks which gave him the strength to overcome his disorder. Prot had some extremely strange physical aspects that also lead me to believe he was an alien. He could see ultraviolet light ‚ he also had no response to medicine ‚and he ate fruit whole. The doctors ran test on him and said that he could see the ultraviolet light but they were unsure how. They also had the files from were Prot was before ‚and it said that he had been given medicines but they had no effect on him. Then when Prot was
Free Sun Scientific method Planet
with dark hair all over to protect ourselves from too much sunlight. However‚ as the human evolved and lost a significant amount body hair‚ the skin‚ the largest organ of the body‚ would become exposed to the strong ultraviolet rays of the sun. Ultraviolet B‚ a specific type of ultraviolet light‚ is beneficial as it effectively converts our cholesterol into Vitamin D‚ which the body cannot simply live without. However‚ too much sunlight exposure and harmful effects quickly outnumber the beneficial ones
Premium Africa Human Human evolution
massless bundles of concentrated electromagnetic energy. Light’s lower frequency is red‚ and the higher frequency is blue. Like sound‚ light has frequencies humans can’t detect. Ultraviolet light is at a frequency higher than violet‚ and infrared is at the frequency lower than the red of visible light. We get UV (ultraviolet) rays from the sun‚ and infrared is used in night vision to see better. Sound travels at about 1‚200 k/hr while light travels at about 300‚000 km/s. It’s easy to notice how
Premium Wavelength Electromagnetic radiation Wave