Answer:
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.
A pedestal rock, also known as a rock pedestal or mushroom rock, is not a true balancing rock, but is a single continuous rock form with a very small base leading up to a much larger crown. Some of these formations are called balancing rocks because of their appearance. The undercut base was attributed for many years to simple wind abrasion, but is now believed to result from a combination of wind and enhanced chemical weathering at the base where moisture would be retained longest. Some pedestal rocks sitting on taller spire formations are known as hoodoos. I think this is the answer if I’m wrong I’m very sorry
It depends on what you're using this lightbulb for.
If you're using it to illuminate your walk-in closet, then it's 75% efficient.
If you're using it to warm the basket where the newborn kittens are, then it's only 25% efficient.
