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  • Solar System
    Our data has improved considerably in the last 20 years. Mercury: no moons Venus: no moons Earth: 1 moon Mars: 2 moons, Phobos, Deimos Jupiter: 67 moons, some of which do not yet have proper...

    Asked by enotes on via web

    1 educator answer.

  • Science
    There are several observations that we can identify some chemical reaction have taken place with in a system. Change in temperature-usually when a reaction takes place heat will be absorbed or...

    Asked by connorcolin3 on via web

    1 educator answer.

  • Science
    The cell theory was arrived at after much study of living cells due to the intellectual contributions of Matthias Schleiden who noted all plants contains cells, and in 1838 added that different...

    Asked by mgoun on via web

    2 educator answers.

  • Science
    The short answer is that velocity is the speed with a direction, while speed does not have a direction. Speed is a scalar quantity -- it is the magnitude of the velocity. Speed is measured in units...

    Asked by azzyj on via web

    2 educator answers.

  • Chemistry
    A compound is a chemical combination of two or more elements in definite proportions. For example, two hydrogen molecules + one oxygen molecule= one water molecule. A solution is a physical...

    Asked by cm16 on via web

    4 educator answers.

  • Speech
    If this is a persuasive speech, any of the hot-button political issues would probably do the trick: - Gun control: good or bad? - The death penalty: use it or not? - School dress codes: good or...

    Asked by hima-20 on via web

    11 educator answers.

  • Science
    Differences: - DNA is double-stranded, RNA is single-stranded. - DNA contains a pentose sugar Deoxyribose, RNA contains the pentose sugar Ribose. A pentose is a 5-carbon sugar molecule. - DNA is...

    Asked by bubbles13 on via web

    2 educator answers.

  • Science
    Similarities ... → Both involve in production of energy → Both involve the exchange of gases → Both the process takes place in cell organelle which was...

    Asked by akatude on via web

    3 educator answers.

  • Chemistry
    Compounds are substances that can be broken down through various chemical processes into elements. Elements are substances that cannot be broken down any further; all the atoms of an element are...

    Asked by oliviastabley on via web

    3 educator answers.

  • Science
    While the functions and applications of a computer are almost endless, we can sense four primary purposes that are all linked to data (information): Entering data, manipulating data, viewing...

    Asked by malfoyxx321 on via web

    1 educator answer.

  • Biochemistry
    DifferencesPassive transport doesn't require energy (ATP), active transport does require energy.Passive transport moves molecules WITH the concentration gradient (high to low), while active...

    Asked by ttt12 on via web

    2 educator answers.

  • Biochemistry
    This question deserves several "answers" aimed at different levels.For elementary-school students, it is important to know that photosynthesis is how green plant cells trap sunlight to...

    Asked by Scott Locklear on via web

    2 educator answers.

  • Science
    Polar and non-polar molecules A molecule is classified as a polar moleculewhen the arrangement of the atoms is such that one end of the molecule has a positive electrical charge and the other end...

    Asked by soccergirl21 on via iOS

    1 educator answer.

  • Science
    Reptiles are cold-blooded animals. They typically lay hard shelled eggs and have skin covered with scales or a bony external plate. They either have four legs or descended from four limber...

    Asked by topher01 on via web

    1 educator answer.

  • Science
    Helpful bacteria: E. Coli are found in the intestines of humans and aid in digestion. Streptomyces is used in making antibiotics. Rhizobium are helpful bacteria found in the soil. They convert...

    Asked by cakeyum3838 on via web

    1 educator answer.

  • Science
    Renewable energy sources are ones which don't run out - which can be renewed. We can keep using them and using them, and we'll never run out. Examples of renewable sources include wind, water power...

    Asked by fjnfkbjnkgjdf on via web

    1 educator answer.

  • Science
    Breathing is a necessary function for human beings. It supplies oxygen for a process called cellular respiration, which is how cells manufacture the energy they need for their life functions....

    Asked by ofomfli on via web

    1 educator answer.

  • Biology
    The cell cycle of a somatic cell consists of interphase and mitosis/cytokinesis. During interphase, which occurs prior to mitosis, there are 3 phases: G1, S, and G2. During the G phases the cell...

    Asked by dgault11 on via web

    1 educator answer.

  • Science
    A rainbow is made by the reflection and refraction of light that interacts with raindrops. Depending on how this interaction occurs with your location relative to the sun and the raindrops you may...

    Asked by enotes on via web

    7 educator answers.

  • Physics
    The term "relative density" means the same as "specific gravity." It is a measure of how dense one thing is when compared to a given reference. The reference is usually water. With respect to...

    Asked by mahmuda092569 on via web

    1 educator answer.

  • Science
    Solute and solvent are the two components of a solution. A solvent is a substance that dissolves the solute. And the solute is the substance being dissolved. To identify them, take note that if the...

    Asked by anum30140a on via iOS

    1 educator answer.

  • Physics
    The formula for pressure is P = F/A In this equation, P stands for pressure while F stands for force and A stands for area. Pressure is typically measured in a unit called the Pascal. So what this...

    Asked by ustaad on via web

    1 educator answer.

  • Science
    There are several differences between monocots and dicots, here are three big ones. The main one (that gave rise to the names) is that monocots have seeds that are one piece (like corn), while...

    Asked by kalaun on via web

    2 educator answers.

  • Science
    Any object will accellerate due to gravity -9.81 m/s^2. By integrating this acceleration over time, one obtains the velocity at any time t. v = gt + v0. In this case, the ball started at rest, so...

    Asked by papertee on via web

    1 educator answer.

  • Science
    During the daytime plants need light to live, in order to be able to produce sugars and carbohydrates as well as oxygen. However at night they can't produce these. In order to survive this period...

    Asked by alpha-03 on via web

    1 educator answer.

  • Science
    The four spheres show how the four main components of Planet Earth form a complete system. These main components are land, air, water, and life. The lithosphere, also known as Geosphere is made of...

    Asked by jarmel on via web

    1 educator answer.

  • Science
    First, lets make sure we understand the word "ratio". A ratio is a comparison of any two things, usually in numerical form. We could compare the number of boys in one of my classes to the number...

    Asked by magicgirl12 on via web

    1 educator answer.

  • Physics
    Impulse is the change in momentum of an object. There are two impulses that your egg design will have to deal with. The first impulse is from the drop itself. Its momentum will increase due to the...

    Asked by meggym on via web

    1 educator answer.

  • Science
    This is an example of a combustion reaction. To answer this you must first balance the equation. The easiest way is to set up the reaction equation without any coefficients: C2H6O + O2 --> CO2...

    Asked by chocolate975 on via web

    1 educator answer.

  • Science
    The convention for converting a DNA code to mRNA code is as follows: DNA matches with mRNAA matches with UT matches with AG matches with CC matches with G Following that convention: DNA:...

    Asked by tabbyt on via web

    2 educator answers.

  • Science
    Mathematically, surface area is a squared dimension while volume is cubed. 3 squared is 9, but cubed it's 27. 4 squared is 16, but cubed is 64. Volume gets much bigger much faster because it's...

    Asked by spaceghost3d on via web

    1 educator answer.

  • Physics
    In a house, there are many electrical appliances that have to run independent of each other. If one appliance is turned on or off it should not affect the other appliances. This is not possible if...

    Asked by kylekasman on via web

    1 educator answer.

  • Biology
    Using a light microscope, one can view cell walls, vacuoles, cytoplasm, chloroplasts, nucleus and cell membrane. Light microscopes use lenses and light to magnify cell parts. However, they usually...

    Asked by tlvw on via web

    1 educator answer.

  • Science
    The hypothalamus is a part of the brain just inferior to the thalamus and superior to the pituitary gland. The hypothalamus is responsible for much of the maintenance of homeostasis in the body....

    Asked by enotes on via web

    1 educator answer.

  • Science
    The main difference between a community and an ecosystem is that the ecosystem is defined as the result of what happens when a community of living organisms shares and interacts within their...

    Asked by muntaha123 on via web

    1 educator answer.

  • Science
    Specifying the equation: C5H12 + O2 --> H2O + CO2 So let's count up the number of atoms on each side: 5 carbons, 12 hydrogens, 2 oxygens for reactants, and 1 carbon, 2 hydrogens, 3 oxygens for...

    Asked by okerino on via web

    1 educator answer.

  • Science
    Substances have properties and characteristics by which we can identify and thus classify them. Two of the broad classifications of these would include the chemical and physical properties of a...

    Asked by directioner20 on via iOS

    1 educator answer.

  • Science
    Take note that the nucleus of an atom is composed of protons and neutrons. And the number of particles present in the nucleus is referred as mass number (Also, called as atomic mass). mass number =...

    Asked by laineyroy on via iOS

    1 educator answer.

  • Science
    I have to correct the first answerer--the "normal" number of 46 chromosomes is the DIPLOID number, not the haploid. In egg and sperm cells, half the number is present, and this is known as the...

    Asked by enotes on via web

    6 educator answers.

  • Science
    Physical property refer to the characteristic of matter that can be observed or measure without changing its composition.Examples are color, odor, phase of matter, freezing point, melting point,...

    Asked by paularinconnnn on via iOS

    1 educator answer.

  • Biology
    The mitochondria are organelles within an animal cell that provide energy for the rest of the cell's functions through the creation of the energy molecule ATP by the chemical reactions occuring in...

    Asked by meloshi on via web

    1 educator answer.

  • Science
    The physical change occurs when the heat displaces the bonds that solidify the wax. Upon cooling, the wax is able to form the bond again. The chemical changes are much more complex. The first...

    Asked by dematha on via web

    2 educator answers.

  • Science
    The major disadvantages of industrialization fall into two categories: social and environmental. Environmentally, industrialization both pollutes the environment and depletes its resources....

    Asked by rohangupta on via web

    5 educator answers.

  • Science
    Sodium chloride (NaCl) and silver nitrate (AgNO3) are both solids that are highly soluble in water. They give a double displacement reaction where the ions switch places and give sodium nitrate...

    Asked by sexymama1267 on via web

    1 educator answer.

  • Science
    The temperature at sea level, under standard conditions, is taken to be 15 degrees C. As we go up or our altitude increases, temperature falls. The rate of decrease of temperature is 6.5 degrees C...

    Asked by enotes on via web

    1 educator answer.

  • Chemistry
    You cannot directly convert grams to atoms. First you must covert your grams to moles, then you can take the moles and covert to atoms. If you take your 878 grams of fluorine and then look at the...

    Asked by msdee on via web

    1 educator answer.

  • Chemistry
    There are more than 1000 compounds we use in our daily lives few are listed below.Sodium chloride (NaCl) known as table salt used for cooking Sodium hydrogen carbonate (NaHCO3) known as baking...

    Asked by booksrawhsuhm on via web

    1 educator answer.

  • Science
    Reading is a complex combination of skills. The human brain must act like a computer: data is taken in via the eyes (or fingers, in the case of Braille), processed within the brain, interpreted and...

    Asked by malfoyxx321 on via web

    8 educator answers.

  • Geology
    There are generally two versions of the answer to this question. The first is the more general about 70% of Earth is water while about 30% is land (US Geological Society). The second is the more...

    Asked by smallys-army on via web

    2 educator answers.

  • Physics
    If I understand this question correctly, the angle of reflection should be 30 degrees with respect to the mirror as well. The angle of the incoming ray and the angle of the ray that is reflected...

    Asked by syedajmain on via web

    1 educator answer.

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