which of the following small bodies are the hardest to tell apart because they are made of similar materials ? A . dwarf planets
2 answers:
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Answer:
The acceleration of the plane is 10.93 m/s² at that instant.
Explanation:
Given:
Mass of aircraft,
Downward thrust produced,
Upward resistance force by air,
Weight of the aircraft acting donward,
According to Newton's second law, net force acting on an object is equal to the product of mass and its acceleration.
Here, the net force is given as the difference of downward forces and upward forces.
Now,
Therefore, the acceleration of the plane is 10.93 m/s² at that instant.
The correct answer to the question is unitless i.e the IMA of a mechanical system has no unit.
EXPLANATION:
The IMA of a mechanical system stands for ideal mechanical advantage. It can be defined as the number of times the input or effort force provided to the mechanical system is multiplied under ideal conditions. The ideal conditions means that the system is free from friction, air resistance etc.
Let us consider is the distance over which the input force is applied.
Let is the distance over which the output force is applied.
The ideal mechanical advantage of the system is calculated as -
IMA = .
Both are measured in distance unit.
Hence, IMA is a unitless physical quantity.
Answer:
The underwater angles of refraction for the blue and red components of the light is 47.8° and 48.2°
Explanation:
Using the Snell's law
n1 * sin Ф1 = n2 sin Ф2
1 * sin 83 = n2 sin Ф2
Ф2 =
Red light
n2 = 1.331
Ф2 = °
Blue light
n2 = 1.340
Ф2 = °