Answer:
a) an airplane in mid-flight
Explanation:
The gravitational potential energy is defined by

where m is the mass of the object;
g is the gravitational acceleration;
an h is the height of the object;
For the examples, the highest value in potential energy will be for the airplane, because it has the more mass and the higher altitude by far in relation to the baseball or the bird.
Answer:
im pretty sure thats called friction, or did you mean something else?
The answer is B because I took the test and had the question
Answer:
Solids
Explanation:
The speed of sound is different in different mediums. Among solids, liquids, and gases, sound travels faster through solids. The particles in solids are more closes as compared to liquids and gases.