What component in a dry cell is like the hydro sulfuric acid in a wet cell? a) positive electrolyte b) primary contact c) positive electrode d) negative electrolyte

d

Explanation:

Hydro sulphuric acid in a wet cell acts as an electrolyte. Similarly in a dry cell ammonium chloride paste acts as electrolyte along with zinc anode, carbon rod as cathode in a cylindrical pot. The dry-cell battery stores energy in an immobilized electrolyte paste, which is ammonium chloride in this case. This minimizes the need for water or a wet electrolyte as in wet batteries.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.