Tap water is fresh water.
The phrase "fresh water" refers to water with very little or no salt in it (as opposed to salt water, such as is found in oceans). Tap water contains little or no salt, and is therefore fresh water.
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the amount of salt dissolved in the water
You can tell if eggs are still fresh by placing them in a bowl of water - if they sink and lay flat on the bottom, they are fresh. If they stand upright or float, they are not fresh and should be discarded.
The size of an edge.
The density of the fresh water is less than the density of the salt water.
If you take a pinch of the baking powder and put it in water, it should fizzle. If it does not fizzle, it is no longer fresh.
Since we don't know the weight of the cube itself, we can only tell the weight of the water. Since the volume of a 3-foot cube is 27 cubic feet, we find that 27 cubic feet is equal to 202 gallons. Because one gallon of water weighs about 8.35 pounds, we multiply 202 x 8.35 for a result of 1,686.7 pounds for the water alone.
By the salinity or salt level in the water which can be measure by a number of devices most commonly the hydrometer or refractometer.
One way to differentiate between salt water and fresh water is by taste; salt water has a distinct salty taste due to its high mineral content, while fresh water tastes neutral. Additionally, salt water is denser than fresh water, so objects will float higher in salt water compared to fresh water. Conductivity tests can also be used to distinguish between the two types of water.
The cube has a larger volume.
u draw a cube and count the vertices... a cube has 8 vertices
Iron is magnetic, lead is not.