Ihave a special thermos that has a vacuum chamber between my hot soup and its outside wall. because my soup is isolated from its surrounding by a vacuum,

a. my soup will stay warm forever because thermal energy cannot pass through a vacuum.
b. my soup will cool down because of conduction.
c. my soup will cool down because of radiation.
d. my soup will cool down because of convection. e. both b and d.

You are your friend move a new refrigerator into his kitchen. you apply a horizontal force of 252 n in the negative x direction to try and move the 56 kg refrigerator. the coefficient of static friction is 0.61. (a) how much static frictional force does the floor exert on the refrigerator? give both magnitude (in n) and direction. magnitude n direction (b) what maximum force (in n) do you need to apply before the refrigerator starts to move?