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  • Waiting for answer How do you simplify ##(sec^2x-1)/ sec^2x##?

    ##=sin^2x## ##(sec^2x-1)/sec^2x## ##=cancel(sec^2x)/cancel(sec^2x)-1/sec^2x## ##=1-cos^2x## ##=sin^2x##

  • Waiting for answer Ethanol (ethyl alcohol) has a density of 0.789 g/mL at 25C....

    ##96.7"ml"## is mass per unit volume therefore: ##rho=m/v## ##:.v=m/rho## ##v=75.5/0.789## ##v=95.7"ml"##

  • Waiting for answer When 10.00g of iron is burned in O2(g) to form Fe3O4(s), eno...

    ##DeltaH_f=-1200"kJ/mol"## ##3Fe+2O_2rarrFe_3O_4## The heat produced: ##=mctheta=851xx4.2xx(38-18)=71484"J"## From the equation 3mol ##Fe## produces 1mol ##Fe_3O_4## Converting moles to grams: ##(3xx56)grarr[(3xx56)+(4xx16)]g## ##168grarr232g## We know that: ##10grarr71484"J"## So to form...

  • Waiting for answer My blood type is O+. Is this the type that is hard to find?

    Actually, it is one of the easiest to find since it is the commonest group. All the Rh+ groups are fairly common, of which O+ is the commonest. The Rh- groups are rare, of which AB-...

  • Waiting for answer How do you verify ##tanh x/(cosh x - sinh x tanh x) = sinh x...

    see below Left Side: ##=(sinhx/coshx)/(coshx-(sinhx*sinhx/coshx)## ##=(sinhx/coshx)/(coshx-sinh^2x/(coshx))## ##=(sinhx/coshx)/((cosh^2x-sinh^2x)/(coshx))## ##=sinhx/coshx * cosh...

  • Waiting for answer How are parallel circuits used in homes?

    Parallel circuits are used throughout your home - because they allow current to keep flowing through various paths, even when it cannot flow through one path. Here are two examples o...

  • Waiting for answer What is an example of an heterogeneous mixture?

    Sand in water. Heterogenous do not have a uniform composition. Generally, you can see the different parts. If you have sand in a glass of water you can see the sand and the water, m...

  • Waiting for answer When an atom has an atomic number of 6 and a mass number is...

    The atomic number is ALWAYS equal to the number of protons; the mass number is equal to the number of protons neutrons combined. Element 6, which is carbon, has several isotopes (f...

  • Waiting for answer How might a Loyalist view the Tea Act of 1773?

    A loyalist would disagree with the Boston Tea Party. They would be angered that the Patriots are breaking the British relations.

  • Waiting for answer How does gas exert pressure on its container?

    Gas exert pressures the same way that everything else does, by colliding with the sides of the container. Since gas molecules are very spread out from eachother as they move around and bounce off the sides of the container they push on it according to Newtons First Law of Motion, thus causing a on...

  • Waiting for answer Does tan(x) have points of discontinuity?

    Yes. It has a dicontinuity at every ##x## for which ##tanx## is not defined. These are the ##x## for which ##cos x =0## That is: ##tan x## is discontinuous at every odd multiple of ##pi /2## These point, of course, are not in the domain of ##tan x##. The discontinuities are non-removable, infin...

  • Waiting for answer What is granite?

    Granite is a felsic intrusive igneous rock consisting primarily of quartz, potassium feldspar (e.g., orthoclase or microcline) or plagioclase feldspar (albite, or labradorite), mica (e.g., muscovite or biotite), and amphiboles (e.g., hornblende). Granites make up much of the intrusive mass of cont...

  • Waiting for answer What is cross-bedding and how is it produced?

    Cross-bedding is a depositional feature formed by prograding deposition such as in ripples, sand bars, or even sand dunes. The cross-bedding appear as slanted beds within the main sand bed and indicate the direction of current or wind flow.

  • Waiting for answer What is the purpose of mitosis?

    To make our body larger and taller and to fulfil our wounds and reshape our body is required. Mitosis increase our body cells. That we grow a child to a grown-up.

  • Waiting for answer Why is k constant in Boyle's law?

    was first formulated as an experimental gas law which described how the pressure of a gas decreased when the volume of said gas increased. A more formal description of states that the pressure exerted by a mass of ideal gas is inversely proportional to the volume it occupies if temperature and a...

  • Waiting for answer What is cirrhosis of the lungs?

    "A chronic inflammation of the lungs, in which the normal air-cells are replaced by fibrous or connective tissue, followed by induration and atrophy of the lung. " (henriettes, 2016)...

  • Waiting for answer What is an organelle that modifies, packages, and transports...

    Golgi Apparatus (golgi bodies+lysosomes) modification is done by lysosomes i.e, digestion to get food ,etc. packing is done by golgi bodies and these are transported our by exocytosi...

  • Waiting for answer What is a buffer in chemistry?

    A buffer solution is defined as a a solution that resist the change on its . A buffer solution is defined as a a solution that resist the change on its pH. It is usually prepared fr...

  • Waiting for answer How do you write 0.05% as a fraction?

    ##1/2000## 1) Put the % over 100 2) Multiply numerator denominator by the same power of 10 that turns the numerator into an integer. 3) cancel the fraction down ##0.05%=0.05/10...

  • Waiting for answer How is friction force related to normal force?

    To a first approximation, the frictional force between two materials is proportional to the normal force. The proportionality constant is called the "coefficient of friction", and is often represented by the Greek letter mu.

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