I’m new but how do you friend people and except friend request

How to tell if two objects are in thermal equilibrium 1.the objects have the same temperature 2.the objects are the same size 3.the objects are touching each other 4.the objects temperatures are changing

Acar travels 40m in 8 seconds find the car speed

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2