a 200 g cooper calorimeter contains 150 g of water at 20 °c. the water is added 250 & of aluminum at 100° c. find the temperature of the system after equilibrium is established. (given c = 390 j/kg*c, c-4186 1/kg"c, c.-900 j/kg*c)​

i would think it's food chain

d eras and periods

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.