Can a shark swim backwards?

Can a shark swim backwards?

Unlike fish, sharks cannot stop suddenly or swim backwards. A shark’s pectoral fins cannot bend upwards like a fish, limiting its swimming ability to forward motion. If a shark needs to move backwards, it uses gravity to fall, not swim backwards.

Were movie trailers always played before the movie?

No. They originally “trailed” the feature film—hence the name. The first trailer appeared in 1912 and was for a Broadway show, not a movie.

How many times did Einstein get married?

Albert Einstein was married two times. He married Mileva Maric (1875-1948) in January 1903, a former fellow student from his time as a student at the Polytechnic in Zurich. They were divorced in February 1919. 4 months later, in June 1919, he married his cousin Elsa Löwenthal (1876-1936), nee Einstein.

How long is the Hadron Collider tunnel?

The LHC is the world’s largest and highest-energy particle accelerator. The collider is contained in a circular tunnel, with a circumference of 27 kilometres (17 mi), at a depth ranging from 50 to 175 metres (164 to 574 ft) underground.

How old do you have to be to buy a motorcycle?

Instruction permit. To obtain a motorcycle instruction permit, the applicant must pass the motorcycle knowledge test, a sign test and a vision screening. If under age 18, the following are also required: Be at least 16 years old.

How many volts should an alternator put out?

A car alternator needs to be putting out at least 13-14 volts (ideally between 13.8 and 14.2 volts) to effectively charge a 12 volt car battery. If the alternator is putting out too much voltage (15+ volts), it is likely your battery acid will boil over out of the battery.

What percentage of the human brain is water?

“Your brain is made up of about 75 percent water” and then “The human brain is the fattest organ in the body and may consists of at least 60 percent fat”. Or: “The old adage of humans only using 10% of their brain is not true.

What vegetable was carved before pumpkins?

But, pumpkins were not the first vegetable to be carved. Long before pumpkin carving became popular, Celtic people in Ireland were carving turnips and lighting them with embers, to ward off evil spirits. This Celtic custom is the historical root of Halloween pumpkin carving.