Afirecracker is thrown downward from a height of 2.75m above the ground, with a speed of 3.15m/s. ignore air resistance, determine the height above the ground that the firecracker would be moving at 5.23m/s.

Here in this question as we can see there is no air friction so we can use the principle of energy conservation

now here we know that

now plug in all values in above equation

divide whole equation by mass "m"

so height of the ball from ground will be 1.35 m

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!

i think its c if i'm wrong