TDS and ppm are common units used to measure a) the amount of some item in the water.
b) the temperature of water.
c) the direction of water currents.
d) the flow speed of a river

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

Newtons view of arrangement of the universe. don't copy from anywhere.

An athlete swings a ball, connected to the end of a chain, in a horizontal circle. the athlete is able to rotate the ball at the rate of 8.13 rev/s when the length of the chain is 0.600 m. when he increases the length to 0.900 m, he is able to rotate the ball only 6.04 rev/s. (a) which rate of rotation gives the greater speed for the ball? 6.04 rev/s 8.13 rev/s (b) what is the centripetal acceleration of the ball at 8.13 rev/s? m/s2 (c) what is the centripetal acceleration at 6.04 rev/s? m/s2