Answer: 4 s
Explanation:
Given
The ball leaves the hand of student with a speed of
When the hand is above the ground
Using the equation of motion we can write
Substitute the values
Thus, the ball will take 4 s to hit the ground.
Use what you learned in the passage to
2 answers:
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The correct answer is
C. Light can pass through Object B faster than it can pass through Object A.
In fact, the index of refraction of a material is defined as:
where c is the speed of light in vacuum and v is the speed of light in the material. Rearranging the equation, we can write the speed of light in the material as:
So we that, the smaller the refractive index n, the greater the speed of light in the material, v. In this problem, object B has lower refractive index than object A, so light travels faster in object B.