Indeed because some leave headlights off and ignore that fact since there are street lights around.
<span>The major difference is the presence or absence of external energy source. In an electrolytic cell, one does not need an outside source of energy like a battery while in a voltaic cell the reaction occurs simultaneously, or without help. The other major difference is that in an electrolytic cell, the flow of electrons is from positive(cathode) to negative(anode). In a voltaic cell the flow of electrons is from negative(anode) to positive(cathode).</span>
I think 8.4
i learned that magnitude 8.4 earthquake had hit japan before
Answer:
Due to energy loss while collision ball will not reach to same height while if there is no energy loss then in that case ball will reach to same height
Explanation:
As we know that initially ball is held at height h = 40 cm
So here we can say that kinetic energy of the ball is zero and potential energy is given as
![U = mgH](https://tex.z-dn.net/?f=U%20%3D%20mgH)
now when strike with the ground then its its fraction of kinetic energy is lost in form of other energies
So the ball will left rebound with smaller energy and hence it will reach to height less than the initial height
While if we assume that there is no energy loss during collision then in that case ball will reach to same height again
Acceleration = force / mass = 8/10 m/s^2
After 5 s (from the start) velocity = 5 x 8/10= 4 m/s