Answer: The package appears to fall straight downward
Explanation:
When the package is dropped from the plane (which has constant speed) it will follow a parabolic path. Then, as the plane and the package have the same constant speed in the horizontal component (X component of the movement) and a constant vertical acceleration due gravity, from the plane the package will always be seen below it, falling straight downward (free fall).
This is possible if it is assumed that there are no additional horizontal forces such as air resistance, thus fulfilling Newton's 1st Law of inertia that estates if a body is in equilibrium the sum of all the forces acting on it is equal to zero.
Answer:
carbon dioxide
Explanation:
In addition to carbon dioxide, discussed below, coal plants all produce the following pollutants: Sulfur dioxide, which leads to acid rain. Coal combustion is the leading source of US sulfur dioxide emissions. Nitrogen oxides, key contributors to ground-level ozone (smog) and respiratory illnesses.
Answer:
Velocity of sound is 512 m/s
Explanation:
for first resonance condition we know that
now the frequency is given as
now to find the velocity of sound we have
