Question

calculate the kinetic energy of an electron of mass 9x10^-31 when it moves with a velocity of 3x10^8 ms^-1

Answer 1

$\huge{\mathfrak{\purple{Question}}}$

calculate the kinetic energy of an electron of mass 9x10^-31 when it moves with a velocity of 3x10^8 ms^-1

$\huge{\mathfrak{\purple{Answer}}}$

K.E. => 21 mv 2

=> 21 ×9×10 −31 ×(10 7 ) 2

=> 4.5×10 −17 J (∵1.6×10 −19eV=1J)

=> 1.6×10 −194.5×10 −17 eV

=> 2.8125×10 ² eV

=>281.25 eV.

#hopeithelps

Answer 2

$\huge{\mathfrak{\purple{Question}}}$

calculate the kinetic energy of an electron of mass 9x10^-31 when it moves with a velocity of 3x10^8 ms^-1

$\huge{\mathfrak{\purple{Answer}}}$

K.E. => 21 mv 2

=> 21 ×9×10 −31 ×(10 7 ) 2

=> 4.5×10 −17 J (∵1.6×10 −19eV=1J)

=> 1.6×10 −194.5×10 −17 eV

=> 2.8125×10 ² eV

=>281.25 eV.

#hopeithelps