Thursday, August 12, 2010

i need help with math

i need help with math

Pick out the Adjective Phrases, in the followingsentences:— < Â« *1. A man in great difficulties came to me for help.2. He is a person of very considerable renown.3. Wild beasts in small cages are a sorry sight.4. A man without an enemy is a man with few friends.5. He tells a tale with the ring of truth in it.6. A friend in need is a friend indeed.7. A stitch in time saves nine.8. A bird in the hand is worth two in the bush.9. Gardens with cooj shady trees surround the village.10. Only a man with plenty of money buys a car of such beauty and power.11. In a low voice he told the tale of his cruel wrongs.12. Po you know the story of the noble Padmini ?« Â»13. He was a lad of great promise,14. He bore a banner with a strange device.15. The police arrested a man of one of the criminal tribes.

math pictures

math pictures

Introduction to pictures of scatter plots:            Let us see about pictures of scatter plots. Scatter plots are also known as scatter graph. It is a mathematical stature used by Cartesian coordinates to display the variables of the group of data. In scatter plots are using when a variable survive that is under the control of the trial. The variable is either self-governing or dependent variable.

exponential notation

exponential notation

It is easier to understand exponents through tables. Here is the table for exponents from -3 to 6 for base 10.Remember 100  is always 1.  ExponentialNotation (Powers of 10)Exponential Form (Power)Expanded FormStandard Name10610x10x10x10x10x10100000010510x10x10x10x1010000010410x10x10x101000010310x10x10100010210x1010010110101001110-11/100.110-21/10 x 1/100.0110-31/10 x 1/10 x 1/10  0.001 

band name list

band name list

The midbrain bears two imperfectly divided optic lobes. A membrane, choroid plexus lies between the optic lobes. It is fused with the plexus over the fourth ventricle, the cavity of the medulla oblongata. Mesencephalon is concerned with sight.RhombencephalonIt is divisible into an anterior meten-cephalon (cerebellum) and a posterior my-elencephalon (medulla oblongata). The cerebellum is small and occurs as a transverse band roofing over the anterior end of the fourth ventricle. The medulla oblongata is largest and highly developed. It controls the powerful sucking structures through trigeminal nerve.Cavities of the brainThe cavities of the brain are ventricles and that of the spinal cord is central canal (p. 114).Spinal cordThe spinal cord is tubular, of fairly uniform diameter throughout its length, tapering gradually towards the posterior, and encloses the central canal. It is flattened, convex dorsally and concave ventrally. Grey matter is in the form of a longitudinal band surrounded by white matter, the two not sharply differentiated

global change biology

global change biology

Major issues of global environmental change are global warming and ozone depletion. The need of the hour is to stabilise the atmospheric concentrations of green house gases. It can be achieved only when all the countries join hand in lowering the global emission of green house gases from their present levels.1. Montreal Protocol. On 16th September, 1987, twenty seven industrialized countries signed an agreement to limit the production and use of ozone-depleting substances (ODS) e.g. chlorofluorocarbons, phasing out of ODS, and also to help the developing countries to implement use of alternatives to CFCs. In May, 1989 Montreal Protocol was ratified by 82 nations at Helsinki (Helsinki Declaration). 175 countries have signed this protocol till date.2. Earth Summit. United Nations Conference on Environment and Development was held in Rio-de-Janerio, Brazil in 1992. It is popularly known as Earth Summit. In this conference, recommendations of CCC (Convention on Climate Change) were signed by 154 nations. A general agreement was reached to maintain emissions of green house gases at 1990 level.3. Kyoto Protocol. A follow up international conference was held in December, 1997 in Kyoto, Japan. In this conference, an agreement was signed by different countries to mitigate global environmental change by taking appropriate measures to reduce emissions of green house gases at a level 5% below the 1990 level by 2008 A.D. to 2012 A.D.

u substitution integration

u substitution integration

1. Indefinite integrations:          An indefinite integration is the family of functions that have a given function as a common derivative. The indefinite integral of f(x) is written ∫ f(x) dx.2. Definite integrations:                If F(x) is the integral of function f(x) over the interval [a, b] ,i.e., ∫ f(x) dx = F(x) then the definite integral of function  f(x) over the interval [a, b] is denoted by `int_a^bf(x)dx` and is defined as `int_a^bf(x)dx`  = F(b) – F(a).                   Where 'a' is called the lower limit and b is called the upper limit of integration and the interval [a, b] is called of integration.Methods of integration:                        It is not possible to integrate each integral with help of the following methods but a large number of varieties of the problems can be solved by these methods so, we have the following methods of integration:                        1. Integration by substitution                        2. Integration by parts.                        3. Partial fractions

body surface area calculator

body surface area calculator

The behaviour of liquid surfaces and the phenomenon of surface tension can be explained by considering the forces of attraction between the molecules of a liquid.Intermolecular forces of attraction are of two types : (i) Attraction between two molecules of the same substance is called cohesion and the force of attraction is called the cohesive force, (ii) Attraction between two molecules of different substances is called adhesion and the corresponding force of attraction is called the adhesive force.These intermolecular forces, both cohesive and adhesive, are short range forces, i.e. they are effective over a very short distance, beyond which they are negligible. The maximum distance between two molecules upto which the intermolecular forces are effective is called the range of molecular attraction (R). An imaginary sphere drawn round a molecule as centre, with a radius equal to the range of molecular attraction, is called the sphere of influence of that molecule. The molecule is attracted only by the other molecules inside this sphere since the forces exerted by molecules outside the sphere are negligible.Three molecules. A, B and C of a liquid, with their spheres of influence, are shown in Fig. 6.3. The molecule A is well within the liquid, molecule B is just inside the liquid surface and molecule C is on the liquid surface.The sphere of influence of the molecule A is completely inside the liquid, so that the other liquid molecules are symmetrically distributed around the molecule A. The molecule is therefore attracted equally in all directions, so that the resultant intermolecular force acting on this molecule is zero.The molecule B is just inside the liquid surface. Its distance from the liquid surface is less than the range of molecular attraction. Therefore a part of its sphere of influence lies outside the liquid surface. This part contains molecules of air, but their number is very small and the forces of attraction exerted by them on molecule B are negligible compared to those exerted by the liquid molecules, inside the sphere of influence. It is clear from the consideration of symmetry, that a resultant downward force acts on the molecule B, trying to pull it inside the liquid.For the molecule C, which is on the liquid surface, half of the sphere of influence lies outside the liquid. This half contains air molecules whose number is extremely small compared to the number of liquid molecules in the lower half of the sphere. Therefore the molecule C experiences maximum downward force, trying to pull it into the liquid.Thus all molecules in a layer of thickness R, below the free surface of the liquid, experience an inward pull. The pull is greater if the molecule is nearer to the surface and it is maximum for a molecule on the surface.In order to increase the surface area, molecules from inside the liquid must be brought to the surface. For this purpose, work must be performed against the in ward pull exerted by the liquid. This work is stored in the surface in the form of potential energy. Thus potential energy of the liquid increases due to increase in its surface area. Conversely, the potential energy of a liquid decreases with decrease in its surface area. Now the natural tendency of a body is to attain the condition of minimum potential energy. Therefore the free surface of a liquid has a tendency to contract and minimise its area, so that the potential energy of the liquid is minimum. This tendency to minimise the surface area gives rise to the phenomenon of surface tension. In order to minimise the surface area, the forces due to surface tension always act tangentially to the liquid surface.The free surface of a liquid is ordinarily plane and horizontal. Sometimes, however, we find the liquid surface to be concave or convex. For example, the surface of water in a capillary tube is concave, while the surface of mercury in a capillary tube is convex. We shall consider the explanation of curved surfaces in Art. 6.4