Question

potable water should be use for drinking
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Answer 1

Answer:

Safe drinking (potable) water is the water that can be delivered to the user and is safe for drinking, food preparation, personal hygiene and washing [3]. The water must meet the required (chemical, biological and physical) quality standards at the point of supply to the users [5].

Explanation:

Water covers more than two-thirds of the earth’s surface, but mostly salty and undrinkable. The available freshwater resource is only 2.7% of the available water on earth but only 1% of the available freshwater (in lakes, rivers and groundwater) is accessible. Most of the available freshwater resources are inaccessible because they are in the hidden part of the hydrologic cycles (deep aquifers) and in glaciers (frozen in the polar ice), which means safe drinkable water on earth has very small proportion (~3%) in the freshwater resources. Freshwater can also be obtained from the seawater by desalinization process. In some countries, sufficient freshwater is not available (physical scarcity). In some countries, abundant freshwater is available, but it is expensive to use (economic scarcity).

Answer 2

Explanation:

Given: Mass of cylinder = 280 kg Volume of cylinder = 4m3. A/q the density of cylinder = mass of cylinder / volume of cylinder = 280 kg/ 4 m3 = 70 kg/ m3.