Answer:
I think no 3 is false
and 4 is true
and the the ones you did are correct
if wrong correct me pls
Voltage, V = IR
Where I is current in Ampere, R is Resistance in Ohms.
V = 9A * 43 Ω
V = 387 V
The main reason why it's very dangerous to open compress gas tank is it can cause major disaster not only in human but also in plants and animals. Compress gas is flammable. And it's like a bomb the damage of gas tank is very catastrophic. It is very harmful if mishandled.
Instantaneous velocity is the velocity at a specific instant in time. I bet you are taking Honors Physics.
