Ineed this answered as fast as 15. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?

Displacement is d  

Vf² = Vi² + 2 g d  

(-20²) = (+10²) + 2 (-9.8) d  

-19.6 d = 300  

d = -15.3 m  

negative means lower

time is t  

d = Vi t + 1/2 g t²

-15.3 = 10 t + (-4.9) t²

4.9 t² - 10 t -15.3 = 0  

t = 3.06 s

Hope this helps -John

d they tend to lose electrons and become cations.

explanation:

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.