The current temperature of the universe as a whole is

2.73 Kelvin

Explanation:

At the beginning, the Universe was just a single hot, infinitely dense point of matter and energy, that later exploded and expanded over the time.

As the universe expanded over time, the average temperature of the universe decreased and decreased, until it reached the current value of 2.73 K.

This temperature corresponds to a peak wavelength in the microwave range: in fact, the accurate measurement of the temperature of the universe has been performed by measuring the Cosmic Microwave Background (CMB), whose distribution can be assimilated to the one of a blackbody radiator, whose corresponding temperature is 2.73 K.

report!

explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."

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.