Explanation:
The <em>electromagnetic spectrum</em> is the name given to the full range of frequencies and/or wavelengths that electromagnetic phenomena may have.
Human eyes respond to a small range of wavelengths in that spectrum. That response is called <em>sight</em>. Because humans can see that electromagnetic energy, it is called <em>visible light</em>.
The range of a projectile motion is given by:
where, 
is the initial speed of the projectile, 
is the angle of the projectile and 
is the acceleration due to gravity.
The maximum height reached is given by:
Part a
It is given that the maximum height reached is equal to the horizontal range. we need to find the angle of the projectile.
Equating the two:
Hence, the projectile was thrown at an initial angle of 
.
Part b
we need to find the angle for which range would be maximum and then write this maximum range in terms of original range.
So, we know that range is given by:
It would be maximum when 
Hence, 
Original range,
Part c:
In the part a, we know that the angle of the projectile is independent of the i.e. the acceleration due to gravity and this is the only factor that varies with the different planets. Hence, the answer would remain same.
Answer:
at the end of its first second of fall
Explanation:
Can I have brainliest
This is what wiki says hope it helps
A displacement is a vector whose length is the shortest distance from the initial to the final position of a point P.[1] It quantifies both the distance and direction of an imaginary motion along a straight line from the initial position to the final position of the point.
A displacement may be also described as a 'relative position': the final position of a point (Sf) relative to its initial position (Si), and a displacement vector can be mathematically defined as the difference between the final and initial position vectors:
