The answer is False, they are not always correct
Resultant: in biomechanics, often resultant vectors are calculated, in which case a single vector is formed by combining (or summing) two or more other vectors. For example, combining horizontal and vertical forces into a resultant force.
It will stay the same. Electric force decreases with distance but increases with magnitude of charge. By doubling them both, they essentially cancel out and nothing changes
Answer:
There is no heat transfer in the system as the temperature before and after remains same i.e, 25 C.
Explanation:
Heat energy is mathematically expressed as,
Q=mCΔT
By looking at the above equation we can say that heat gain or loss by any system is equal to the mass times specific heat multiplied by the change in temperature.
Now if we consider the water system in view of this equation then ΔT would be 0 therefore it is evident that there is no transfer of heat.
If we consider the empty half of the tank so it is mentioned that there is nothing no air and giving us m=0, hence Q=0.
Mathematically we can express this as
Q=mCΔT
Q=(5)(4200)(0)
Q= 0 KJ <em>(which indicates that there was no heat gain or loss by the system)</em>