Answer: A balloon provides a simple example of how a rocket engine works. The air trapped inside the balloon pushes out the open end, causing the balloon to move forward. The force of the air escaping is the "action"; the movement of the balloon forward is the "reaction" predicted by Newton's Third Law of Motion.
Explanation: ur welcome
Answer:
The velocity of the acorn just before it reaches the ground is 19 m/s
The kinetic energy when hitting the ground is 3.1 J
Explanation:
Given;
mass of the acorn, m = 0.017 kg
height of fall, h = 18.5 m
Apply the law of conservation of mechanical energy;
mgh = ¹/₂mv²
gh = ¹/₂v²
v² = 2gh
v = √2gh
v = √(2 x 9.8 x 18.5)
v = 19 m/s
Thus, the velocity of the acorn just before it reaches the ground is 19 m/s
Now, determine the kinetic energy when hitting the ground;
K.E = ¹/₂mv²
K.E = ¹/₂(0.017)(19)²
K.E = 3.09 J
K.E = 3.1 J
Therefore, the kinetic energy when hitting the ground is 3.1 J
Answer:
Convection causes warm air in your living space to rise. That air moves by conduction through the ceiling to the attic floor .
Electromagnet is<span> a strong, short-lived magnet created by a looped electrical current.
I am sure it is correct! </span>
