Recent questions tagged sat

The ratio of the difference in energy between the first and second Bohr orbit to that between the second and the third Bohr orbit is

asked Jul 26, 2018 by meena.p

1 answer

If the quadratic eqaution $y= 3(x+5)^2+12$ is written in the standard form what is the value of $c$ ?

asked Jul 26, 2018 by meena.p

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Which of the following are the roots of the equation $x^2+8x+12=0$ ?

asked Jul 26, 2018 by meena.p

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If $x=-2$ when $x^2-2px+p^2=0$ what is the value of $p$ ?

asked Jul 26, 2018 by meena.p

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The factored form of a quadratic polynomial is $y=(2x-3)(x+5)$. What are the solutions to the equation $y = 0$ ?

asked Jul 26, 2018 by meena.p

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If $x^2-x=30$, what is the value of $x-2$?

asked Jul 26, 2018 by meena.p

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If $2x-5 \sqrt x+9=16$ then $5 \sqrt x-15=$

asked Jul 26, 2018 by meena.p

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The equation $\large\frac{1}{4}$$(4x^2-8x-p)=132$, is satisfied. When $x=+8$ and $x=-6$. What is the value of $\large\frac{p}{4}$ ?

asked Jul 26, 2018 by meena.p

1 answer

Which one of the following ions has electronic configuration $[Ar]3d^6?$

asked Jul 25, 2018 by meena.p

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Deuterium nucleus contains

asked Jul 25, 2018 by meena.p

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Calculate the Broglie wavelength of an electron moving with 1% of the speed of light ?

asked Jul 25, 2018 by meena.p

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The uncertainty in the position of a moving bullet of mass 10 g is $10^{-5}\;m$. Calculate the uncertainty in its velocity ?

asked Jul 25, 2018 by meena.p

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Calculate wave number of yellow radiations having wavelength of $5800\; A_0$ .

asked Jul 25, 2018 by meena.p

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Which of the following is not permissible arrangement of electrons in an atom ?

asked Jul 25, 2018 by meena.p

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Maximum number of electrons in a subshell of an atom is determined by the following

asked Jul 25, 2018 by meena.p

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If uncertainty in position and momentum are equal, then uncertainity in velocity is

asked Jul 25, 2018 by meena.p

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Given : The mass of electron is $9.11 \times 10^{-31}\;kg$ . Planck constant is $6.626 \times 10^{-34}\;Js$ the uncertainty involved in the measurement of velocity within a distance of $0.1\;A$ is :

asked Jul 25, 2018 by meena.p

1 answer

The orientation of an atomic governed by

asked Jul 25, 2018 by meena.p

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What will be the sum of values of x in the equation $16^x-10(4)^x+16=0$ ?

asked Jul 24, 2018 by meena.p

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Solve for x: $\qquad \qquad \qquad 2(x+2)^2=3x-5$

asked Jul 24, 2018 by meena.p

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If $18x^2=39x+84$, what can be the possible values of x.

asked Jul 24, 2018 by meena.p

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If $\large\frac{x^2-x}{x-1}$$=1$ what are the possible values of $x$ are :

asked Jul 24, 2018 by meena.p

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Simplify the rational expression : $\qquad \qquad \qquad \large\frac{6k^2-18k-24}{2k+2} $

asked Jul 24, 2018 by meena.p

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$36x^2-12x-15=0$ solve for $x$

asked Jul 24, 2018 by meena.p

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Given $x^2-5x+6=0$ and $x+k=4$ find the value of k.

asked Jul 24, 2018 by meena.p

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Solve $\qquad \qquad \qquad 2x^2+7x-9=0$

asked Jul 24, 2018 by meena.p

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When electrons are passed through electromagnetic field, electrons are deflected away from

asked Jul 23, 2018 by meena.p

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$Mg^{2+}$ is isoelectronic with

asked Jul 23, 2018 by meena.p

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Identify the wrong statement in the following

asked Jul 23, 2018 by meena.p

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Find energy of each of the photons which correspond to light of frequency $3× 10^{15}\; Hz.$

asked Jul 23, 2018 by meena.p

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Write the complete symbol for the atom with the given atomic number (Z) and Atomic mass (A) $Z = 92, A = 233$

asked Jul 23, 2018 by meena.p

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Find the total mass of protons in 34 mg of $NH_3$ at STP.

asked Jul 20, 2018 by balaji.thirumalai

1 answer

Which of the following is the energy of a possible excited state of a possible excited state of hydrogen?

asked Jul 20, 2018 by swapnarajan1982

1 answer

Calculate the wavelength (in nanometer) associated with a proton moving at a velocity $1.0\times10^3ms^{-1}$ (mass of proton =$1.67\times10^{-27}kg \;and\; h = 6.63\times10^{-34}Js)$

asked Jul 20, 2018 by swapnarajan1982

1 answer

The de Broglie wavelength of a tennis ball of mass 60g movig with a velocity of 10 metres per second is approximately. Planck's constant, $h= 6.63\times10^{-34}Js$

asked Jul 20, 2018 by swapnarajan1982

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In a hydrogen,if energy of an electron in the ground state is 13.6 eV, then that in the 2nd excited state is

asked Jul 20, 2018 by swapnarajan1982

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The energy of an electron in the first Bohr orbit of H atom is −13.6eV . The possible energy value(s) of the excited state(s) for electrons in Bohr orbits to hydrogen is(are)

asked Jul 20, 2018 by swapnarajan1982

1 answer

In a Bohr's model of atom when an electron jumps from n=1 to n=3 how much energy will be emitted or absorbed

asked Jul 20, 2018 by swapnarajan1982

1 answer