What is the meaning of SPF?

What is the meaning of SPF?

Sun Protection Factor – Sun Protection Factor, or SPF, is a measure of how effectively the sunscreen’s formula limits UV-B exposure and is printed right on the front of the container. A sunscreen’s SPF number effectively means how much longer you can stay in the Sun compared to not wearing any sunscreen at all.

What was the first country to allow females to vote?

New Zealand was the first country to allow women to vote (in 1893), while the King Abdullah of Saudi Arabia granted women the right to vote in 2011. The United States finally began allowing women to vote in 1920, after the ratification of the 19th Amendment to the Constitution.

What states border west Virginia?

It is bordered by Virginia to the southeast, Kentucky to the southwest, Ohio to the northwest, Pennsylvania to the north (and, slightly, east), and Maryland to the northeast. West Virginia is the 41st largest by area and the 38th most populous of the 50 United States.

Which gas is known as laughing gas?

Laughing gas is nitrous oxide, N2O (more properly called dinitrogen oxide). It is a colorless gas with a sweet odor and taste. Inhalation leads to disorientation, euphoria, numbness, loss of motor coordination, dizziness, and ultimately a loss of consciousness.

How much of air is nitrogen?

The common name given to the atmospheric gases used in breathing and photosynthesis is air. By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1%.

What kind of alcohol is safe to drink?

Ethanol is the only alcohol that is safe to drink till today. To the layman, the term: ‘alcohol’ is widely used rather than the chemist term ethyl alcohol or ethanol.

What kind of dinosaur is little foot?

The main characters include Littlefoot (Apatosaurus), Cera (Triceratops), Ducky (Saurolophus), Petrie (Pteranodon), Spike (Stegosaurus), and in the spin-off television series, Chomper (Tyrannosaurus) and Ruby (Oviraptor).

How many people in the world are over 100 years old?

A growing number of Americans are living to age 100. Nationwide, the centenarian population has grown 65.8 percent over the past three decades, from 32,194 people who were age 100 or older in 1980 to 53,364 centenarians in 2010, according to new Census Bureau data.