Hardness in groundwater is due to the presence of metal ions. true or false

False

Explanation:

Water hardness in most groundwater is due to a natural occurrence caused by the weathering of  limestone, sedimentary rock and calcium bearing minerals. Hardness can also  occur locally in groundwater from chemical and mining industry effluent or  excessive application of lime to the soil in agricultural areas.

Limestone is not a metallic element or metallic alloy, although it does contain the metallic element calcium, it is not formed by the same processes as metals are.

if the forces acting on an object are unbalanced, the object will accelerate in the direction of the net force on the object.

explanation:

this is best explained by having an understanding of newton's second law, which states that f=ma. you see, when the forces are unbalanced, net force (sum of all forces) is not zero. therefore making it necessary for the object to have an acceleration in the direction of the net force.

the answer is mosques. they are an important part of islamic culture.