Hard water contains calcium and magnesium, which undergo oxidation and clog water pipes. which statement best describes this change as a chemical change?

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

In a system, when potential energy decreases, then entropy also decreases. true false

2. -/1 pointsserpse10 2.7.p.017.mi. an object moving with uniform acceleration has a velocity of 14.0 cm/s in the positive x direction when its x coordinate is 2.97 cm. if its x coordinate 2.85 s later is -5.00 cm, what is its acceleration? cm/s2 need ? read it master it