Your favorite professor decided to throw in the air a marker above his head (vertically). if the marker leaves his hand at a height of 1.2 m from the ground with an initial velocity of 20 m/s, when would the marker reach the highest point in the air (1.6 m from the ground)?

Explanation:

From the exercise we know

To find how long does it takes the marker to reach the highest point we need to use the equation of position:

Now, we need to use the quadratic formula:

Solving for t

or

So, the answer is t=4.06s because the other option is almost 0 and doesn't make any sense for the motion of the marker

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!