Tsar Nicholas II and Tsarina Alexandra were the Roma place in 1917. During this revolution, Tsar Nicholas Il v
killed. The remains of two of the Tsar and Tsarina's chi
people came forward who claims to be the missing Ro
Alexei?
O DNA technology
O STR analysis
O mtDNA analysis
O Y-chromosome analysis

the device is called “ rocket engine”

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.