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How often do comets collide with other planets? How often to comets collide with Earth?
Comet Shoe maker Levy hit Jupiter from July 16 to July 22 1994..This was observed by many space probes and astronomers..There are many evidences on earth but we do not...
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How is organic nitrogen converted into inorganic nitrogen?
The atmospheric nitrogen is converted into usable forms by the help of two great prokaryotic bacteria and cyanobacteria. This process is process known as nitrogen fixation. Most of...
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How do nitrogen, phosphorus, and potassium effect plant growth?
All I remember from basic biology is that those are macro nutrients that plants need to grow. The link should explain how each of those nutrients help the plant grow....
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Both cytokinins and gibberellins promote plant growth. What are the ways in which these hormones stimulate growth?
Both Cytokinins and Gibberellins promote cell division. As a result of cell division , lots of new cells are formed which results in the growth of plant. Growth is nothing...
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Why does cutting off the tip of the main stem ofa plant often result in the plant growing bushier?
The phyto hormone i.e., auxins are produced at the apex of the plants. This hormone is responsible for apical dominance by checking the growth of the lateral branches.. The pruning...
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Why do plant cells that transport water against the force of gravity contain many more mitochondria than other plant cells do?
The process of transporting water against gravity is called , so called because it requires energy to occur (as opposed to passive transport which occurs naturally). Now, the molecule which...
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Can the plant's cell wall burst if it is too full of water molecules? If so, why, how, and what would the plant and an individual cell look like? Also, is that why cut flowers wilt and die?
Under normal circumstances the cell wall will prevent too much water from entering. When the wall is weakened through the use of enzymes or freezing. The cut flowers get weak...
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What does it mean to repeat measurements often which are often dependent on the certainty with which an estimation can be made?
You repeat same thing multiple times, If it is in science experiment.E.g. if you are measuring temperature of water or weighing mass of something. In the end you can average...
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A Nitrogen atom with 7 protons and 8 neutrons has a mass number of 15 amu. However on the periodic table, the atomic mass for Nitrogen is 14.01. How is this possible?
If a nucleus possesses 7 protons, 7 fundamental positive particles, it is by definition a nitrogen atom. The most abundant isotope (as they are called) is $""^14N$, however, there exist...
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I did a Magnesium Oxide Lab.Magnesium often reacts with nitrogen in the air. If some of the magnesium had reacted with the nitrogen, would it make the % composition of ur sample higher or lower than it should be? Explain (Hint-Try a sample calculation).
Okay, so you've performed the classic magnesium oxide lab. I assume that you have your data, so I'll just walk you through this from a theoretical standpoint. So, you...
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