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  • Science
    A runner runs 100 meters in 12 seconds and we are asked to find the average speed: The average speed is the total distance divided by the total time over some interval. (This is the rate of change...

    Asked by user104621 on via web

    1 educator answer.

  • Science
    Zero. A bit fat 0. The reason it's called the "Hadean eon" is after Hades, which is the Greek word for the underworld---it's meant to invoke fire and brimstone, because that's what the world was...

    Asked by autumnkpinkme on via web

    1 educator answer.

  • Science
    Typically, the word "interior" is used to mean "inside". For example, when we are discussing various cell organelle (specialized structures that carry out specific functions), we commonly use the...

    Asked by ninaalaboyy823 on via web

    1 educator answer.

  • Science
    The process of phosphorylating ADP to form ATP and removing a phosphate from ATP to form ADP in order to store and release energy respectively is known as the ATP cycle. ATP stands for adenosine...

    Asked by user8441766 on via web

    1 educator answer.

  • Science
    Organelle are structures within cells that have specialized functions. Some of the key organelle in an animal cell are nucleus, mitochondria, golgi apparatus, cell membrane, endoplasmic recticulum,...

    Asked by alexmay123123 on via web

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  • Science
    The best choice to identify carbon dioxide gas is the limewater test. Limewater is an aqueous solution of calcium hydroxide. When CO2 is bubbled through lime water a precipitate of calcium...

    Asked by sararobideaux on via web

    1 educator answer.

  • Science
    For the mentioned reaction, the balanced chemical equation is: `` The reactants are hydrochloric acid (HCl) and sodium hydroxide (NaOH) and the products are sodium chloride and water. We can use...

    Asked by gabbiesaboss1738 on via web

    1 educator answer.

  • Science
    A salt can be produced by titration under two conditions: 1. If it’s soluble so that it precipitates out of solution. 2. If there’s a change in pH, color or conductivity that allows for...

    Asked by user4051659 on via web

    1 educator answer.

  • Science
    If the output power of the light source is P = 0.1 Watt, the intensity of the light at the location of the potassium foil (d = 0.5 meters away) will be `I = P/(4pid^2) = 0.1/(4pi(0.5)^2) = 0.032...

    Asked by user2375185 on via web

    1 educator answer.

  • Science
    Organic compounds are the compounds that contain carbon. There are a very large number of organic compounds around us, including those contained in our very own bodies, plants, animals, etc. Apart...

    Asked by gradztabala on via web

    1 educator answer.

  • Science
    Sun is our star and is the source of life on Earth. It keeps the Earth warm enough and provides sunlight to plants for making food and oxygen. The Sun has 3 layers, known as the core, radiative...

    Asked by user7474839 on via web

    1 educator answer.

  • Science
    We can use equations of motion to solve this problem. Using `v^2 = u^2 + 2as` for the part where the ball drops from the height of 3 m, we can calculate the ball's velocity as it hits the ground....

    Asked by mtshii on via web

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  • Science
    Reactivity is a measure of the reaction potential of an element. In other words, reactivity of an element tells us the likelihood of an element reacting with another element. For example, an...

    Asked by stephie28 on via web

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  • Science
    Designer babies are babies specifically 'designed' by using genetic engineering to contain some specific traits. These traits could pertain to intelligence, hair color, eye color, health, etc. This...

    Asked by user4271069 on via web

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  • Science
    Half life of an element refers to the time period over which half of the original amount of element will degrade and we will be left with only 50% of the original amount. For example, if the half...

    Asked by dashkalove97 on via web

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  • Science
    If a sunspot were pointed right at Mercury in this way, the planet would become even more mind-bogglingly hot.Sunspots look dark in our visual spectrum, so we might suspect that they are colder (or...

    Asked by jaheimknight28 on via web

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  • Science
    In comparison to other members of the electromagnetic spectrum (such as visible light, infrared, ultraviolet rays, etc.), gamma rays have the longest frequency and hence the smallest wavelength....

    Asked by user7645118 on via web

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  • Science
    The matter that we observe around us is composed of protons and neutrons, which in turn are composed of quarks. The quark is an elementary particle that interacts through the strong nuclear force....

    Asked by sweetsmiley125 on via web

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  • Science
    Hydrolysis is the process by which large polymers are broken down into their sub-- units known as monomers. These monomers are small molecules that are repeated inside the larger polymer and held...

    Asked by rosegardengate57 on via web

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  • Science
    Groups on the periodic table are the vertical columns. Sometimes groups on the periodic table are called families. Main group elements that are in the same group on the periodic table share similar...

    Asked by user6441208 on via web

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  • Science
    Nitrogen triiodide contains 3 atoms of iodine as the name suggests (note the word "tri"). It has a chemical formula of `NI_3` . Since it decomposes into nitrogen gas (represented as `N_2`) and...

    Asked by hachambers on via web

    1 educator answer.

  • Science
    The principal axis of a spherical mirror is a line going through the center of the mirror that is exactly perpendicular (sometimes said "normal") to the surface of the mirror. By definition, a...

    Asked by josviedsouzarocks17 on via web

    1 educator answer.

  • Science
    Hello! To find momentums we need the speeds before and after collision. The simplest way to find these speeds is to use the energy conservation law. Before fall, a ball had only potential energy...

    Asked by habeeb2hover on via web

    1 educator answer.

  • Science
    The general equation for the hydrolysis of a halogenalkane is: RBr + H2O `->` ROH + H+ + Br- In this equation, “Br- “ represents a halogen. Halogenalkanes are also known as haloalkanes or...

    Asked by on via web

    1 educator answer.

  • Science
    When sodium metal is added to ethanol, the following chemical reaction takes place: `2 C_2H_5OH + 2Na -> 2C_2H_5ONa + H_2` Thus, we can see that hydrogen gas is evolved when sodium reacts with...

    Asked by on via web

    1 educator answer.

  • Science
    When ethanol is heated with potassium dichromate (acidified with dilute sulfuric acid), the dichromate oxidizes the ethanol to ethanoic acid. The oxidation equation is written as: `C_2H_5OH + H_2O...

    Asked by on via web

    1 educator answer.

  • Science
    Hurricanes may lose strength over land because of cool temperatures, a lack of moisture, and/or friction. Hurricanes form over low pressure regions with warm temperatures over large bodies of...

    Asked by enotes on via web

    1 educator answer.

  • Science
    You refer to the book Never Cry Wolf, written by naturalist Farley Mowat. In 1948-49, Mowat was sent by the Dominion Wildlife Service (renamed the Canadian Wildlife Service in 1950) to investigate...

    Asked by mackenzienewhart on via web

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  • Science
    Pure water is composed entirely of water molecules. A sample that is composed of only one substance is called a pure substance. Mixtures contain two or more different types of substances. The...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Fungi and plants are two different kingdoms of multicellular eukaryotic cells. Being multicellular means that fungi and plants are made of many specialized cells. Being eukaryotes implies that the...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Diffusion is a transport mechanism (another example of a transport mechanism is advection) in which the material moves from a region of higher concentration to a region of lower concentration....

    Asked by enotes on via web

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  • Science
    The nitrogen cycle is one of the cycles of matter and details the movement of various forms of nitrogen through the components of the environment. There are different forms of nitrogen, such as...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Fleece is a soft, fuzzy material that is used to make a variety of things. Fleece is a common alterative of wool. Fleece has been used to make sweaters, jackets, throw blankets, mittens, hats,...

    Asked by sandydao97 on via web

    1 educator answer.

  • Science
    Glucose does not dissociate when dissolved in water. In comparison, a substance like sodium chloride, dissociates into sodium and chloride ions when mixed with water. And the chemical equation for...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Hello! By definition, acceleration is the measure of a velocity change in time. In a particular case when the acceleration is constant, the velocity of an object is changed uniformly (linearly)...

    Asked by enotes on via web

    1 educator answer.

  • Science
    A green plant is an autotroph capable of manufacturing organic nutrients from inorganic molecules. In order to do so, specific requirements must be met. The plant must have a sufficient supply of...

    Asked by user5772235 on via web

    1 educator answer.

  • Science
    People do light exercises to stay fit, improve blood circulation and stay healthy in general. Light exercises can include walking, light chores, etc. Basically, anything that does not raise your...

    Asked by duffyfiona00 on via web

    1 educator answer.

  • Science
    Hello, I would like to suggest for you to choose cloning research rather stem cell research. Stem cell research is more specific than cloning, since stem cell research can be discussed as a subset...

    Asked by user2252476 on via web

    1 educator answer.

  • Science
    The electronegativity of an atom indicates how strongly it can pull electrons towards itself when bonded with another atom. Each element has been assigned a numerical value to indicate its relative...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Whenever you perform a mole conversion calculation, you will need to use a mole conversion factor. The three mole conversion factors are: 1 mole = 22.4 liters (for ideal gases) 1 mole = molar mass...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Hello! I suppose we apply a constant braking force `F` perpendicularly to the radius of spin. Then the torque `tau` (moment of force) will be `F*r.` From the other hand, this torque will cause an...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Porous simply means containing pores, or holes. In other words, anything that has pores is termed as porous. For example, filters have pores and are hence porous. Similarly, soil is porous and so...

    Asked by rainbowduckie on via web

    1 educator answer.

  • Science
    The fundamental concept here is quite simple: Bigger things are heavier. The clast size tells us how large the individual pieces of rock are, and thus how heavy they will be.Therefore, a sediment...

    Asked by haleeord on via web

    1 educator answer.

  • Science
    Hello! The speed of a falling ball is `g*t` downwards, where g is the gravity acceleration. The height of a falling ball is `H(t)=H_0-g(t^2)/(2),` where `H_0` is the initial height. A ball strikes...

    Asked by enotes on via web

    1 educator answer.

  • Science
    The cell membrane is selectively permeable, that is, it allows the entry to only a few molecules, while barring all the others. If the cell membrane was completely permeable, all the molecules will...

    Asked by enotes on via web

    1 educator answer.

  • Science
    In biology, decomposition occurs when an organisms that is no longer living decays into smaller parts. This process returns nutrients to the ground. Organisms that aid in the process of...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Based on the general definition of weight, which is defined in physics by the formula: Weight=Mass times Force of acceleration due to gravity, objects do not weigh less in water. They actually are...

    Asked by enotes on via web

    1 educator answer.

  • Science
    Dinosaurs flourished and dominated the earth for about 186 million years, during the Mesozoic Era. Dinosaurs went extinct at the end of the Mesozoic era and at the beginning of the Paleogene...

    Asked by sourodeep98 on via web

    1 educator answer.

  • Science
    The chemical reaction that occurs when effervescent tablets are placed in water is as follows: Reaction in Words: Citric Acid + Sodium Bicarbonate yields Water + Carbon Dioxide + Sodium Citrate...

    Asked by michaelnien321 on via web

    1 educator answer.

  • Science
    Density is the amount of mass per unit of volume. Density is calculated using the equation: Density = mass/volume. Anything which increases the amount of mass in a particular volume will increase...

    Asked by enotes on via web

    1 educator answer.

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