A magician performs in a room with a ceiling, which is 2.70 m above his hands. He throws a ball upwards such that it reaches the ceiling with zero speed. Calculate the initial speed of the ball and the time it takes for it to reach the ceiling. A magician performs in a room with a ceiling, which is 2.70 m above his hands. He throws a ball upwards such that it reaches the ceiling with zero speed. Calculate the initial speed of the ball and the time it takes for it to reach the ceiling.

a) v = 7.28 m/s

b) t = 0.74 s

Explanation:

a) The initial speed of the ball can be calculated using the following equation:

Where:

is the final speed = 0

is the initial speed =?

g: is the gravity = 9.81 m/s²

h: is the height = 2.70 m

Hence, the initial speed of the ball is 7.28 m/s.

b) To find the time that takes the balls to reach the ceiling we can use the next equation:

Therefore, the time it takes for the ball to reach the ceiling is 0.74 s.

I hope it helps you!

1 - wave length

2 - amplitude

3 - crest

4 - trough

explanation:

duh.

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!