Answer:Magnetic fields are invisible, at least usually. But scientists from NASA's Space Sciences Laboratory have made them visible as "animated photographs," using sound-controlled CGI and 3D compositing.
Explanation:
When acid reacts with water, the hydroxide ion is formed I think it is true.
First we need to know the equation of work
work=force times distance
w= 25 N times 20 meters
w= 500 joules