It's not possible to calculate the current with the given data. "Amp" is not a unit for measuring resistors, and "C" is not a unit for measuring batteries. So we don't know the resistance of this circuit or the potential difference applied to it, and thus can't calculate the current. If we could, it might turn out to be 3 gallons, but that's just a reckless guess.
<span>NaCH is not an element, it is a compound. An element can be found and identified on the periodic table to elements. A compound is a combination of two of more elements. NaCH is composed of three elements: Na (sodium), C (carbon) and H (hydrogen), making it a compound.</span>
Missing question: "how much work is done by the teacher?" (found on internet)
Solution:
The work done to move the desk across the floor is equal to

where F is the horizontal force applied to move the desk, and d is the distance covered by the desk. If we use F=20 N and d=5 m, we find the work done:
There all diffrent speeds