Astone is thrown directly upward with an initial speed of 9.6 m/s from a height of 12.8 m. after what time interval (in s) does the stone strike the ground? use g 9.8 m/s^2 enter a number with 2 digits behind the decimal point.

1.89 seconds

Explanation:

t = Time taken

u = Initial velocity = 9.6 m/s

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

Time taken to reach maximum height is 0.97 seconds

So, the stone would travel 4.7 m up

So, total height ball would fall is 4.7+12.8 = 17.5 m

Time taken by the stone to travel 17.5 m is 1.89 seconds

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.