De la 2surse coerente aflate la distanta d=2 metri una de alta se propaga intrun mediu elastic unde cu viteza =340 m/s. la distanta l =4 metri de la mijlocul dintre surse perpendicular pe segmentul care le uneste a fost inregistrat un maxim de interferenta iar urmatorul la distanta de 1, 5 metri de la acesta pe linia paralela cu cea pe care se afla sursele. care este frecventa de oscilatie a surselor?

answer: good job it's all correct !

explanation:

that would be because of both gravity and friction. so     c

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.