If an airplane is flying at 300 km /h to the east and is facing a headwind of 18.0 km/h what is the airplane's final velocity

Explanation:

Airplane is moving with speed of 300 km/h

so this is the absolute speed with which airplane by which it can fly in still air

so here if air is also moving with some speed then the net speed of the plane in ground frame would be different

So here we can say

now when head wind is blowing then in that case the speed of plane is opposite to the motion of the plane

so here we have

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate

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.