Im pretty sure it’s: A warm air rises
Explanation:
The reaction forms calcium hydroxide, Ca(OH)2 and hydrogen gas (H2). The calcium metal sinks in water and after an hour or so bubbles of hydrogen are evident, stuck to the surface of the metal.
<h3>
Answer:</h3>
Distance = 7 m
Power = 12.5 J/s or watts
<h3>
Explanation:</h3>
Work done = 175 Joules
Force exerted = 25 Newtons
Work done is the product of force exerted and the distance moved by a body.
Therefore;
Work done = Force × distance
Rearranging the formula we can work out the distance;
Distance = work done ÷ Force
= 175 J ÷ 25 N
= 7 m
Thus, the grand piano was moved by 7 m across the living room .
On the other hand,
Power is the rate at which the work is done.
Therefore;
Power = Work done ÷ time
Work done = 175 Joules
Time = 14 seconds
Thus;
Power generated = 175 J ÷ 14 sec
= 12.5 J/s or watts
Hence, a power of 12.5 J/s was generated in moving the grand piano.
The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension<span>. I think the correct answer is option A. H2O will have the highest surface tension due to the hydrogen bonds that are present. Hope this answers the question. Have a nice day.</span>
S will fill first in the third energy level
