Why are elements different from each other?

Why are elements different from each other?

The atoms of different elements are different from each other because they have different numbers of protons. The graphic below illustrates this point by showing the atoms of two elements in the containers of oxygen and hydrogen.

When did the US leave the gold standard?

No country currently backs its currency with gold, but many have in the past, including the U.S.; for half a century beginning in 1879, Americans could trade in $20.67 for an ounce of gold. The country effectively abandoned the gold standard in 1933, and completely severed the link between the dollar and gold in 1971.

Who invented the Celsius scale?

Anders Celsius was a Swedish astronomer who built the Uppsala Observatory and invented the Celsius (or centigrade) thermometer scale. Anders Celsius was born on November 27, 1701 in Uppsala, Sweden. He was a Swedish astronomer who taught at the University of Uppsala.

Is it legal to charge for tap water?

It seems like a sensible provision, but business is business and the law does not prevent charging for the use of a glass or for service. It doesn’t extend to filtered tap water. They can charge for that. But if they serve alcohol, they have to provide free drinking water, whether it’s filtered or unfiltered.

How long does it take for light to travel from Earth to Mars?

All communication between Mars and Earth goes through satellites. Because of the distance, there is a substantial delay. As communication signals travel at the speed of light, this means that it can take between 3 and 22 minutes for the information to reach the other end, so a phone call would not be practical.

What fears are we born with?

It is a common misconception, as people are born with only two fears – of falling and of loud noises. These two fears are incorporated in the human DNA and have become a mechanism for survival which is passed to new generations.

How do snakes hear if they dont have ears?

When people and most animals hear, sound waves strike the eardrum and go to the inner ear, which is sensitive to the sound waves or vibrations. Snakes do not have eardrums, but their skins, muscles, and bones carry the sound waves to the inner ears.

Who invented the Fahrenheit scale?

Fahrenheit (symbol °F) is a temperature scale based on one proposed in 1724 by the German physicist Daniel Gabriel Fahrenheit (1686–1736), after whom the scale is named.