The word insulate means to protect from heat, cold,... So when a can is insulated, means that is protected from heat. So the answer is: C. stays the same :))) I hope this is helpful have a nice day
Heat flow by vibrating the molecules in any medium. Therefore, some medium is essential for heat transfer and hence no heat flows across an insulated vacuum can. Without any medium, heat transfer is stopped which means that neither the heat from outside environment can flow into the can nor it can flow from the can into the external environment.
Hence, the heat contained within the can shall remain the same.
