Science

Refine Search

What are some sources of water vapor in the air?

Atmospheric water vapor can also result from human activities, such as farming, the watering of lawns and landscaping. Additional sources of water vapor include man-made geographical alterations, such as the evaporated water from canals, artificial lakes and reservoirs behind dams.\nWater vapor is also a by-product of combustion; the burning of natural gas, petroleum and other fossil fuels also contributes to the amount of water vapor in the atmosphere. Extraction of water from underground sources such as aquifers for drinking and irrigation is another anthropogenic source of water vapor.\nWat..

Continue Reading

Which organelles carry out cellular respiration?

For a cell to go through the process of cellular respiration, it must use glucose as an initial source of energy. There are two phases of cellular respiration: glycolysis, whereby glucose is broken down into pyruvic acid, and the oxidation of pyruvic acid into carbon dioxide and water. In both phases of cellular respiration, adenosine triphosphate, or ATP, an energy source, is also released. While glycolysis takes place in the cytosol of cells, the rest of the process of cellular respiration occurs in the mitochondria.

Continue Reading

What were Irene Joliot-Curie's experiments?

The daughter of famed scientists, Pierre and Marie Curie, Irene continued her parent's work in the realm of molecular physics. Two of her most successful experiments were the creation of radioactive nitrogen by fusing boron with alpha particles and the creation of a radioactive phosphorus isotope from aluminum. Joliot-Curie also conducted extensive research on the atom that was instrumental in the discovery of the neutron. Her experiments in this area led to the discovery of uranium fission.\nThe creation of these radioactive elements have made a vast impact on modern life, particularly i..

Continue Reading

What do organisms need to survive?

All organisms need food because it contains essential nutrients that body cells use for their growth, movement, and reproduction. Water is very important because it is the medium where vital nutrients and minerals enter the body. Without water, the cells and tissues of animals and humans would not function properly. At the same time, water is the natural habitat for such organisms as fish, crocodiles, hippopotamus, octopus, and other marine animals. The heat energy from the sun is perhaps the most important need for most organisms. While plants need sunlight for photosynthesis, animals need it..

Continue Reading

How can you get the answers for Apex Biology Semester 2?

Finding the answers to questions that are likely to appear on the semester 2 test requires more than just reading the book. Apex recommends that students develop familiarity with the methods of scientific inquiry through direct instruction from the course instructor. This is important, as the course ends with a close look at applied biology in reference to the anatomy and physiology of the human body.\nThe Apex program also calls for a significant lab component. Answers to the questions posed during this phase of the curriculum are most easily found in the course materials, direct instruction ..

Continue Reading

What would happen if plate tectonics stopped?

Recent research into plate tectonics suggests that there were times during the earth's geologic history when the continental plates stopped moving. The motion of tectonic plates contributes to the cooling of the earth's interior. Thus, if plate tectonics were to stop, the earth would cool more slowly. Investigations of the isotopes present in older rocks on the earth suggests that this occurred roughly 1.5 billion years ago and may happen again.

Continue Reading

What is the diameter of the low power field of view of a microscope?

Microscopes are optical devices used to view and magnify objects that are too small to be seen by the naked eye. Generally, compound light microscopes are composed of two lens systems: ocular and objective. The ocular lens pertains to the eyepiece, which has a constant magnification of 10x. The objective lenses provide shifting magnification power for the eyepiece.Compound microscopes usually have four objective lenses that are used for scanning, low power magnification, high power magnification and oil immersion. The low power objective lens has a magnification of 10x. To calculate the total ..

Continue Reading

What is the molecular weight of toluene?

Toluene is a water-insoluble liquid that is used as a solvent in organic chemistry. It is a mono-substituted benzene ring that is also an aromatic hydrocarbon. The compound is a common solvent due to its ability to dissolve many carbon compounds and industrial compounds such as paint thinners, rubber, ink, adhesives and disinfectants. It is also utilized as a fuel booster in gasoline, so it's often utilized in internal combustion engines.

Continue Reading

How many gallons are in a 100-pound propane tank?

Tanks of this size are not required by law to have OPD valves. OPD stands for overflow protection device and prevents the propane tank from being overfilled. This protective valve is required on smaller sizes of propane tanks. Since it is not required on larger tanks, care must be taken not to overfill a 100-pound tank that's not equipped with an OPD.

Continue Reading

How do you convert Central time to GMT?

Determine Central TimeCST converts to Central Daylight Time, or CDT, when the United States is on Daylight Savings Time from late March to early November. This impacts the conversion to GMT.Add hours to Central TimeCentral Time is behind GMT. When the U.S. is on Standard Time, CST is six hours behind GMT. During Daylight Savings, CDT is five hours behind GMT. Therefore, to convert Central Time to GMT, add six hours to CST and five hours to CDT.State GMT TimeIf it is 9 a.m. CST, add 6 hours to get 3 p.m. GMT. Inversely, if it is 9 p.m. CST, add 6 hours to get 3 a.m. GMT. For Daylight Savings, i..

Continue Reading
Showing 2481 to 2490 of 10000 (1000 Pages)