Complete a short essay (no more than 150 words) discussing the following topics: -the ph scale, what it consists of and what it measures.

-What makes something acidic.

-What makes something basic.

-How H+ ions and OH- ions are distributed in acids and bases.

-What litmus paper and hydration paper are used to measure.

The crank oa rotates in the vertical plane with a constant clockwise angular velocity ω0 of 5.6 rad/s. for the position where oa is horizontal, calculate the force under the light roller b of the 10.6-kg slender bar ab.

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s. a. determine jay’s mass. b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

What equation is used to calculate the weight of an object on a plant ?