A piece of copper of mass 300g at a temperature of 950 o C is quickly transferred into a vessel of negligible heat capacity containing 250g
of water at 25 o C. If the final steady temperature of the mixture is
100 o C. Calculate the mass of water that will boil away. (take specific
heat capacity of copper = 4.0x10 2 Jkg -1 K -1 , specific heat capacity of
water = 4.2 x10 3 Jkg -1 K -1 , specific latent heat of vaporization of steam =
2.26x10 6 Jkg -

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

i think its c if i'm wrong

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.  

i think the answer is bone