Dao động điều hòa là chuyển động thẳng biến đổi đều hay không? và tại sao?

Ineed extreme for task 2. my student number is 571721. many to whoever solves this correctly, im in debt to you.

Which type of bond is found between the atoms of a molecule? a. metallic b. delocalized electron c. covalent d. ionic

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.