If A is a square matrix such that A2=I, then (A – I) 3+(A+I)3 – 7A is equal to
If A is a square matrix such that A2=I, then (A−I) 3+(A+I)3−7A is equal to A Solution Given that A2=I (A−I)3+(A+I)3−7A... View Article
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243 is the cube root of _________
What is cube root? Cube root of a number can be found by a very simple method which is the prime... View Article
The number of octahedral voids in hexagonal primitive unit cell are_______
Solutions Effective number of anions ‘A’ in HCP=(12 x 1/6) +(2 x 1/2)+(3 x 1) =(2) + (1) + (3)... View Article
In solid state PCl5 is a
In solid-state PCl5 is an Ionic solid with [PCl6]+ octahedral and [PCl4]− tetrahedral Solution Phosphorus pentachloride is a pale greenish-yellow... View Article
Find the factors of 288
The factors of 288 are the numbers that divide 288 exactly without leaving any remainder. In other words, the factors... View Article
At what time between 4 and 5 o’clock will the hands of a watch point in opposite directions?
A clock has three hooks and all three move at different rates. The speed of moving object depends on the... View Article
Explain u/v rule of differentiation
If f(x) is a function, which is equal to ratio of two functions u(x) and v(x) such that; f(x) =... View Article
Animal husbandry and plant breeding programmes are the examples of_______
Animal husbandry and plant breeding programmes are the examples of artificial selection Artificial selection Artificial selection is a process in which one... View Article
The pairing of homologous chromosomes takes place in ____________ phase.
The pairing of homologous chromosomes takes place in Prophase I Mitosis Mitosis is that step in the cell cycle where... View Article
Convert ethanamine to methanamine
The structure of ethanamine is CH3CH2NH2. Conversion of ethanamine to methanamine To convert ethanamine into methanamine we will follow the... View Article
The HCF of 95 and 152 is
The Highest Common Factor (HCF) of two or more numbers is the greatest of all their common factors. Therefore, it... View Article
The reflex angle between the hands of the clock at 10:25 is
Solution A reflex angle is an angle that measures more than 180 degrees and less than 360 degrees. On observing... View Article
A water fountain on the ground sprinkles water all around it. If the speed of water coming out of the fountain is v, the total area around the fountain that gets wet is
The de-broglie wavelength of an electron is given by the equation λ=1.227/ √v nm On substituting the wavelength value in the... View Article
If an angle of a parallelogram is two-third of its adjacent angle, find all the four angles.
Solution Let x and y be two adjacent angles of a parallelogram. According to the question, x=2/3 y —– (... View Article
What is coefficient?
An algebraic expression is a mathematical phrase that contains integral or fractional constants (numbers), variables (alphabets) and algebraic operators (such... View Article
Cartilage is formed by________________________
Cartilage is formed by chondrocytes What is cartilage? Cartilage is defined as a type of connective tissue that provides structural... View Article
An electron is accelerated from rest through a potential difference of V volt. If the de Broglie wavelength of the electron is 1.227×10 – 2nm, the potential difference is
The de-broglie wavelength of an electron is given by the equation λ=1.227/ √v nm On substituting the wavelength value in the... View Article
The vapour density of N2O4 at certain temperature is 30. Calculate the percentage dissociation of N2O4 at this temperature.
Given that The vapour density of N2O4 at a certain temperature is 30 Find out The percentage dissociation of N2O4... View Article
Light with an average flux of 20W/cm2 falls on a non-reflecting surface at normal incidence having surface area 20cm2. The energy received by the surface during time span of 1 minute is :
Given that I=20W/cm2 Area A=20cm2 Time t=1min=1×60sec=60sec Find out We have to determine the energy received by the surface during time... View Article
A mass of 0.5 kg moving with a speed of 1.5 m/s on a horizontal smooth surface, collides with a nearly weightless spring of force constant, k = 50 N/m. The maximum compression of the spring would be ____
Given that Mass of the object m = 0.5 kg Velocity v = 1.5m/s Force constant k = 50N/m Find... View Article
