The following statement (p->q)->[(~p->q)->q] is? 1.a tautology 2.equivalent to ~p->q 3.equivalent to p->~q 4.a fallacy
The diameter of the eye-ball of a normal eye is about 2.5 cm. The power of the eye lens varies from?
The diameter of the eye-ball of a normal eye is about 2.5 cm. The power of the eye lens varies from
Circle(s) touching x-axis at a distance 3 from the origin
and having an intercept of length on y-axis is (are)
explain how
Let PQ be a focal chord of the parabola
The tangents to the parabola at P and Q meet at a point lying on the line y = 2x + a, a > 0.
1.Length of chord PQ is?
2.If chord PQ subtends an angle θ at the vertex of y2 = 4ax, then tanθ =
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Atoms
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Ans
The synthesis of alkyl fluorides is best accomplished by?
An organ pipe open at one end is vibrating in first overtone and is in resonance with another pipe open at both ends and vibrating in third harmonic. The ratio of length of two pipes is?
The wheel of a car is rotating at the rate of 1200 revolutions per minute. On pressing the accelerator for 10 seconds it starts rotating at 4500 revolutions per minute. The angular acceleration of the wheel is?
In a npn transistor electrons enter the emitter in
s. 4% of the electrons are lost in the base. The current transfer ratio will be?
Hail storms are observed to strike the surface of the frozen lake at with the vertical and rebound at
with the vertical. Assume contact to be smooth, the coefficient of restitution is?
Explant is required to be disinfected before placing in culture. This is done by?
Chemistry
What is amount of work done in moving a point charge Q around a circular arc of radius r at the centre of which another point charge q is located?
Two electric field lines never cross each other why?
Why should electrostatic filed be zero inside a conductor?
Math
Ap
Calculate the Fermi energy for gold at 0K. The density of gold is , and the molar mass is 197 g/mol.
Describe Packing Efficiency
What is F Centre
Consider an expanding sphere of instantaneous radius R whose total mass remains constant. The expansion is such that the instantaneous density remains uniform throughout the volume. The rate of fractional change in density
is constant. The velocity v of any point on the surface of the expanding sphere is proportional to?
What are some examples of ionic bonds?
What are the three main properties of ionic compounds?
What are the characteristics of an ionic bond?
Are ionic bonds good insulators?
Is h20 an ionic compound?
What is the difference between covalent and ionic bonding?
Which one is the strongest bond?
Are ionic or covalent bonds stronger?
What is the weakest type of bond?
How would you describe the electrical charge of an ionic compound?
Which is an example of a metallic bond?
Why is the melting point of magnesium oxide is much higher than sodium chloride?
Why are ionic solids poor conductors of electricity?
Do ionic solids have high melting points?
What are the six properties of ionic compounds?
Are covalent bonds hard and brittle?
Why ionic compounds are solid?
Why are ionic bonds so strong?
Are ionic solids brittle?
Why ionic solids are highly brittle?
Why do ionic compounds tend to be hard and brittle?
What isReason of Ionic solids are hard and brittle ?
What is Difference between crystalline and amorphous solids with one example of each.
Give the significance of a lattice point.