PLEASE HELP ANSWER BOTH QUESTIONS PLEASE!!

The work done on an elevator that has a mass of 1000 kg and lifted 4 m in ten seconds is Joules.
A. 39200
B. 4000
C. 408

The size motor is needed in the elevator is Watts.
A. 40.8
B. 3920
C. 400
D. 392

Iron reacts with sulfur to form iron sulfide. if 60 grams of iron reacts with sulfur to produce 90 grams of iron sulfide, how much sulfur has been used in the chemical reaction?

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

The energy produced as a result of this flow of electrons from atom to atom is called