Yes your choices of B C D are right
Answer:
Unit of power is watt
Explanation:
Power = rate of doing work
or
Power, P = W/t
Where
W is work done and t is time
The unit of work done is Joules and that of time is seconds.
Power, P = J/s
We know that, J/s = watts
Hence, the unit of power is watts.
Answer:
What is the question needing to be answered?
Explanation:
Usually with a scientific hypothesis, you ask the question in an if, then statement. For example: If it rains outside, then the ground will be wet. It's kind of like a cause and effect statement.
Answer:
A spectator ion refers to a charged atom in a chemical reaction that does not undergo a chemical change.
Hope this helps!!!
4 Movement of less dense material
3 Heating of cooler material
1 cooling of warmer material
2 movement of denser material