A solid object of mass M is made from a material of specific heat capacity C and specific latent heat of fusion L and of very high thermal conductivity enters the atmosphere from outer space, its temperature being below its melting point by DeltaT. Because of atmospheric friction it absorbs energy at a constant rate R. The time before the solid becomes completely molten is given by

A solid object of mass M is made from a material of specific heat capa

1.	A solid object of mass M is made from a material of specific heat capacity C and specific latent heat of fusion L and of very high thermal conductivity enters the atmosphere from outer space, its temperature being below its melting point by DeltaT. Because of atmospheric friction it absorbs energy at a constant rate R. The time before the solid becomes completely molten is given by
Answer» `(M(C+L)DeltaT)/( R )` `(M(C DeltaT+L))/( R )` `M(C+L)DELTA TR` `( R )/(M Delta T(C+L))` Answer :B