While calorie counts vary with pizza toppings and recipes, a slice of cheese pizza (weighing about 103 grams) is around 272 calories, according to LiveStrong.com. A calorie counting website averaged a slice of cheese pizza at nearly 250 calories. Indulge wisely and check out these eight pizza deals for Pi Day. Read: The Best Pi Day Jokes. Villa Italian Kitchen: Customers can get a Neapolitan cheese pizza for $3.14 with a coupon.
The Navy's nuclear-powered submarines can stay submerged for long periods of time. Air is isn't a problem as their make their own oxygen and keep the air clean. The limits on how long they can stay underwater are food and supplies. Submarines generally stock a 90-day supply of food, so they can spend three months underwater. The diesel-powered submarines (not now used by the Navy) had a limit of several days submerged.
The limits of battery technology severely constrain the amount of time a diesel sub can stay underwater. Because of these limitations of batteries, it was recognized that nuclear power in a submarine provided a huge benefit.Nuclear generators need no oxygen, so a nuclear sub can stay underwater for weeks at a time.Also, because nuclear fuel lasts much longer than diesel fuel (years), a nuclear submarine does not have to come to the surface or to a port to refuel and can stay at sea longer.Nuclear subs and aircraft carriers are powered by nuclear reactors that are nearly identical to the reactors used in commercial power plants.lso, because nuclear fuel lasts much longer than diesel fuel (years), a nuclear submarine does not have to come to the surface or to a port to refuel and can stay at sea longer. Nuclear subs and aircraft carriers are powered by nuclear reactors that are nearly identical to the reactors used in commercial power plants.