The ionization potential of hydrogen is
13.6 eV/mole. Calculate the energy in
kJ required to produce 0.1 mole of H^+
ions. Given, 1 eV = 96.49 kJ mol^(−1) )
Given any positive integer n show
that there are two positive rational
numbers a and b, a ≠ b, which are not
integers and which are such that a − b,
a^2 − b^2 , a^3 − b^3 , ....., a^n − b^n are all
integers.
Let ABC be a triangle and h_a the
altitude through A. Prove that
(b + c)^2 ≥ a^2 + 4h_a ^2 .
(As usual a, b, c denote the sides BC,
CA, AB respectively.)
The students were asked whether
they had dictionary(D) or thesau
rus(T) in their room.the results
showed that 650 students had dict
ionary,150 did not had dictionary,
175 had a thesaurus,and 50 had
neither a dictionary nor a thesaur
us,fimd the number of student who
(i)live in domitory
( ii)have both dictionary and thesaurus
(iii)have only thesaurus
STATEMENT-1 : If an object is at
rest then there should not be any friction
on it.
STATEMENT-2 : If an object is moving
then the friction acting on it has to be
kinetic.
STATEMENT-3 : If an object is at rest
then kinetic friction cannot act on it.
Two balls of mass 500g and 750g moving with 15m/s and
10m/s towards each other collides. Find the velocities of the ball after
collision, if the coefficient of restitution is 0.8