What kind of electric cell is considered to be rechargeable?
a. storage cell
b. dry cell
c. primary cell
d. electrode cell

a. Storage cell

Explanation:

A Storage cell is an electric cell that can be recharged. During recharging of a Storage cell, current flow is reversed and oxidation occurs on the positive electrode and reduction on the negative electrode. Since the anode is by definition the electrode on which oxidation occurs and the cathode where reduction occurs, the positive electrode is now the anode and the negative is the cathode.

ice to water 1 water to vapour 2 latent heat

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.