Consider a restricted 2d random walk the random on a square lattice with lattice constant a walker is not allowed to step back, but it ca go forward, turn right and turn left with can 1 equal probability. calculate the mean-square end-to-end distance for such a restricted n-step random walk starting with the general equation n n 2(cos (0)) r2) (3) = a i=1 j=1 which in this case can be evaluated analytically. note that the values for the cosines can be only 0, 1 or - on the square lattice. derive the exact result for the characteristic ratio cn.

the independent variable, or the one that is intentionally manipulated is the speed.

it becomes positively charged by charging it

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.