(a) The calcium, magnesium, and iron hardness expressed as meq/L and as mg/L equivalent CaCO3. (b) The total hardness as meq/L and as mg/L equivalent CaCO3. (c) The alkalinity as meq/L and as mg/L equivalent CaCO3. (d) The nitrate as mg/L nitrogen (N). (e) The hydrogen and hydroxyl ion concentration in moles/L

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2