Recent questions tagged bookproblem

How will you distinguish between the following pair of terms:Tetrahedral void and octahedral void?

asked Jul 29, 2014 by sreemathi.v

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How will you distinguish between the following pair of terms:Crystal lattice and unit cell?

asked Jul 29, 2014 by sreemathi.v

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How will you distinguish between the following pair of terms:Hexagonal close-packing and cubic close-packing?

asked Jul 29, 2014 by sreemathi.v

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'Stability of a crystal is reflected in the magnitude of its melting points'. Comment. Collect melting points of solid water, ethyl alcohol, diethyl ether and methane from a data book. What can you say about the intermolecular forces between these molecules?

asked Jul 29, 2014 by sreemathi.v

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How can you determine the atomic mass of an unknown metal if you know its density and the dimension of its unit cell? Explain.

asked Jul 29, 2014 by sreemathi.v

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What is the coordination number of atoms in a body centred cubic structure?

asked Jul 29, 2014 by sreemathi.v

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What is the coordination number of atoms in a cubic close-packed structure?

asked Jul 29, 2014 by sreemathi.v

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State whether the statement "$\sqrt {11}$ is a rational number." is true or false. Give reason.

asked Jul 29, 2014 by rvidyagovindarajan_1

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State whether the statement "If $x,\:y$ are integers such that $x>y$, then $-x<-y$" is true or false. Give reason.

asked Jul 29, 2014 by rvidyagovindarajan_1

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State whether the statement "Circle is a particular case of an ellipse." is true or false. Give reason.

asked Jul 29, 2014 by rvidyagovindarajan_1

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State whether the statement "The centre of a circle bisects each chord of the circle." is true or false. Give reason.

asked Jul 29, 2014 by rvidyagovindarajan_1

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State whether the statement "Each radius of a circle is a chord of the circle." is true or false. Give reason.

asked Jul 29, 2014 by rvidyagovindarajan_1

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What is meant by the term 'coordination number'?

asked Jul 29, 2014 by sreemathi.v

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Classify the following solid as ionic, metallic, molecular, network (covalent) or amorphous.Si

asked Jul 29, 2014 by sreemathi.v

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Classify the following solid as ionic, metallic, molecular, network (covalent) or amorphous.LiBr

asked Jul 29, 2014 by sreemathi.v

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Classify the following solid as ionic, metallic, molecular, network (covalent) or amorphous.Rb

asked Jul 29, 2014 by sreemathi.v

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Classify the following solid as ionic, metallic, molecular, network (covalent) or amorphous.Brass

asked Jul 29, 2014 by sreemathi.v

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Classify the following solid as ionic, metallic, molecular, network (covalent) or amorphous.Graphite

asked Jul 29, 2014 by sreemathi.v

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Classify the following solid as ionic, metallic, molecular, network (covalent) or amorphous.Plastic

asked Jul 29, 2014 by sreemathi.v

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Classify the following solid as ionic, metallic, molecular, network (covalent) or amorphous.$P_4$

asked Jul 29, 2014 by sreemathi.v

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Classify the following solid as ionic, metallic, molecular, network (covalent) or amorphous.$I_2$

asked Jul 29, 2014 by sreemathi.v

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Classify the following solid as ionic, metallic, molecular, network (covalent) or amorphous.SiC

asked Jul 29, 2014 by sreemathi.v

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Classify the following solid as ionic, metallic, molecular, network (covalent) or amorphous.Ammonium phosphate $(NH_4)_3PO_4$

asked Jul 29, 2014 by sreemathi.v

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Classify the following solid as ionic, metallic, molecular, network (covalent) or amorphous.Tetra phosphorus decoxide $(P_4O_{10})$

asked Jul 29, 2014 by sreemathi.v

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What makes a glass different from a solid such as quartz? Under what conditions could quartz be converted into glass?

asked Jul 29, 2014 by sreemathi.v

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By giving counter example show that the statement "The equation $x^2-1=0$ does not have a root lying between $0$ and $2$." is false.

asked Jul 29, 2014 by rvidyagovindarajan_1

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Define the term 'amorphous'. Give a few examples of amorphous solids.

asked Jul 29, 2014 by sreemathi.v

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By giving counter example show that the statement "If all the angles of a triangle are equal then the triangle is an obtuse angled triangle" is not true.

asked Jul 29, 2014 by rvidyagovindarajan_1

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Show that the statement "If $x$ is an integer and $x^2$ is even, then $x$ is also even." using contrapositive method.

asked Jul 26, 2014 by rvidyagovindarajan_1

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Show that the statement "For any real numbers $a$ and $b$, $a^2=b^2$ implies that $a=b$" is not true by giving counter example.

asked Jul 26, 2014 by rvidyagovindarajan_1

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Show that the statement " If $x$ is real number such that $x^3+4x=0$, then $x$ is 0." is true using contra positive method.

asked Jul 26, 2014 by rvidyagovindarajan_1

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Show that the statement " If $x$ is real number such that $x^3+4x=0$, then $x$ is 0." is true using contradiction method.

asked Jul 26, 2014 by rvidyagovindarajan_1

1 answer

Show that the statement " If $x$ is real number such that $x^3+4x=0$, then $x$ is 0." is true using direct method.

asked Jul 25, 2014 by rvidyagovindarajan_1

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An equilateral triangle is inscribed in the parabola $ y^2 = 4 ax$, where one vertex is at the vertex of the parabola. Find the length of the side of the triangle

asked Jul 24, 2014 by thanvigandhi_1

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A man running a racecourse notes that the sum of the distances from the two flag posts from him is always 10 m and the distance between the flag posts is 8 m. Find the equation of the posts traced by the man.

asked Jul 24, 2014 by thanvigandhi_1

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Find the area of the triangle formed by the lines joining the vertex of the parabola $ x^2 = 12y $ to the ends of its latus rectum.

asked Jul 23, 2014 by thanvigandhi_1

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A rod of length 12 cm moves with its ends always touching the coordinate axes. Determine the equation of the locus of a point P on the rod, which is 3 cm from the end in contact with the x-axis.

asked Jul 23, 2014 by thanvigandhi_1

1 answer

An arch is in the form of a semi-ellipse. It is 8 m wide and 2 m high at the centre. Find the height of the arch at a point 1.5 m from one end.

asked Jul 23, 2014 by thanvigandhi_1

1 answer

The cable of a uniformly loaded suspension bridge hangs in the form of a parabola. The roadway which is horizontal and 100 m long is supported by vertical wires attached to the cable, the longest wire being 30 m and the shortest being 6 m. Find the length of a supporting wire attached to the roadway 18 m from the middle.

asked Jul 23, 2014 by thanvigandhi_1

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An arch is in the form of a parabola with its axis vertical. The arch is 10 m high and 5 m wide at the base. How wide is it 2 m from the vertex of the parabola?

asked Jul 23, 2014 by thanvigandhi_1

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If a parabolic reflector is 20 cm in diameter and 5 cm deep, find the focus.

asked Jul 23, 2014 by thanvigandhi_1

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For the statement "If a quadrilateral is a parallelogram then its diagonals bisect each other"' is the statement "If the diagonals of a quadrilateral bisecyt then it is a parallelogram" contra positive or converse?

asked Jul 22, 2014 by rvidyagovindarajan_1

1 answer

For the statement "If a quadrilateral is a parallelogram then its diagonals bisect each other"' is the statement "If the diagonals of a quadrilateral do not bisect then it is not a parallelogram" contra positive or converse?

asked Jul 22, 2014 by rvidyagovindarajan_1

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For the statement "If you live in Delhi then you have winter clothes.' is the statement "If you have winter clothes then you live in Delhi" contra positive or converse?

asked Jul 22, 2014 by rvidyagovindarajan_1

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For the statement "If you live in Delhi then you have winter clothes.' is the statement "If you do not have winter clothes then you do not live in Delhi" contra positive or converse?

asked Jul 22, 2014 by rvidyagovindarajan_1

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Write the statement "To get 'A' in the class it is necessary that you do all the exercises of the book." in 'if-then' form.

asked Jul 22, 2014 by rvidyagovindarajan_1

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Write the statement "A quadrilateral is a parallelogram if its diagonals bisect each other" in 'if-then' form.

asked Jul 22, 2014 by rvidyagovindarajan_1

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Write the statement " The banana tree will bloom if it stays warm for a month.' in 'if-then' form

asked Jul 22, 2014 by rvidyagovindarajan_1

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Write the statement "You get a job implies that your credentials are good" in 'if-than' form.

asked Jul 22, 2014 by rvidyagovindarajan_1

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Find the equations of the hyperbola satisfying the given conditions : Foci $(0, \pm \sqrt{ 10} )$ , passing through $(2,3 )$

asked Jul 21, 2014 by thanvigandhi_1

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