Explain the theory of plate tectonics in your own words please do not use any website this is 50 points and brainlist for the longest one and i will check to see if its from the internet or any website.

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 c water to flow through it at an average speed of 4.0 m/s?

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?