Areal-valued function f is said to be periodic with period t ≠ 0 if f(x + t) = f(x) for all x in the domain of f. if t is the smallest positive value for which f(x + t) = f(x) holds, then t is called the fundamental period of f. determine the fundamental period t of the given function.

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue

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.