The square root of 80 is: 8.944
A charged particle moving in a magnetic field experiences a force equal to:

Thus, the magnitude of the force that the proton experiences is given by:

The magnetic field is perpendicular to the proton's velocity, therefore, we have
. Replacing the given values, we obtain:

I'm assuming we're applying the standard Integral form of the calculation of work. The solution is provided in the image.
A wind turbine turns wind energy into electricity using the aerodynamic force
Heat transfer by means of fluid flow is called "convection".