If the pool is 25 yards, and a lap is one length of the pool, then it would take 70.4 laps to go a mile. In a 25 meter pool you need to swim 64.4 laps. In collegiate swimming â¦ competitions, the swimmers in the mile event swim 64 laps in 25m pools.
Boron has five protons, and assuming it's not an ion, five electrons. The number of neutrons depends on the isotope. It can have anywhere from 2 to 14 neutrons, although only the isotopes with 5 or 6 neutrons is stable. Boron 11 (with 6 neutrons) is 80% of the boron found in nature, boron 10 (with 5 neutrons) is 20% of the boron found in nature. Source(s): The CRC Handbook of Chemistry and Physics, 79th Edition.
Boron has also been used in some rockets as an ignition source. Boron-10, one of the naturally occurring isotopes of boron, is a good absorber of neutrons and is used in the control rods of nuclear reactors, as a radiation shield and as a neutron detector. Boron filaments are used in the aerospace industry because of their high-strength and lightweight.