Wana help me on this doubt of chemistry. I would be gratefully.
I will make you brainlist if you give me all of these answer.​

How do scientists think that gravity affected the formation of our solar system?

What produces wave a)sound b) heats c)transfer of energy d)vibrations

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device