In order for two objects to have the same temperature

[tanzerino]

1. In order for two objects to have the same temperature, they must _____


a- be in thermal contact with each other
b-have all these qualities, except for thermal equilibrium
c- have all of these properties
d- have the same relative "hotness" or "coldness" when touched
e- be in thermal equilibrium




2. My guess is e but want to be sure.



3. a is not correct because of radiation i guess b and c don't sound right and for d some metals can be same temperature but because of conductivity one might feel hotter or colder

 

[willem2]

I've no Idea what the qualities or properties mentioned in answers b and c are.
a is wrong, because of the existence of thermometers, melting ice, radiative equilibrium and also dumb luck. d is also wrong for the reason you mentioned, and e is correct.

 

[tanzerino]

i think so too b and c don't make sense:S a and d are definetaly wrong so e is the choice to go then for sure right?