Questões de Inglês

Have you ever wondered what keeps a hot air balloon flying? The same principle that keeps food frozen in the open chest freezers at the grocery store allows hot air balloons to fly. It’s a very basic principle: Hot air rises and cold air falls. So while the super-cooled air in the grocery store freezer settles down around the food, the hot air in a hot air balloon pushes up, keeping the balloon floating above the ground. In order to understand more about how this principle works in hot air balloons, it helps to know more about hot air balloons themselves.

A hot air balloon has three major parts: the basket, the burner, and the envelope. The basket is where passengers ride. The basket is usually made of wicker. This ensures that it will be comfortable and add little extra weight. The burner is positioned above the passenger’s heads and produces a huge flame to heat the air inside the envelope. The envelope is the colorful fabric balloon that holds the hot air. When the air inside the envelope is heated, the balloon rises.

The pilot can control the up-and-down movements of the hot air balloon by regulating the heat in the envelope. To ascend, the pilot heats the air in the envelope. When the pilot is ready to land, the air in the balloon is allowed to cool and the balloon becomes heavier than air. This makes the balloon descend.

Before the balloon is launched, the pilot knows which way the wind is blowing. This means that she has a general idea........................... which way the balloon will go. But, sometimes the pilot can actually control the direction that the balloon flies while.......................................... flight. This is because the air above the ground is sectioned .........................................layers in which the direction of the wind may be different. So even though the pilot can’t steer the balloon, she can fly or higher or lower into a different layer ......................................air. Some days the difference between the direction of the wind between layers is negligible. But other days the difference is so strong that it can actually push the balloon in a completely different direction!

       BYOD (Bring Your Own Device) refers to the policy of allowing employees to supply their own computing devices for use at work. Employers save money by eliminating hardware purchasing and maintenance overhead, and employees enjoy the freedom of choice to use whichever mobile phone, tablet or laptop that best meets their preferences.

       For example, a user may have a Windows PC for work and a MacBook for a personal laptop. The keyboard shortcuts for each platform are slightly different, making it easy to mangle copy-paste functions in word processors and spreadsheets. Using the same BYOD MacBook for work and personal computing eliminates these switchover errors.              Even for non-SaaS organizations, user error typically represents a third of all data loss, second only to hardware failure. The reduction in user error gained from BYOD policies is present regardless of whether an employee is creating a document in Google Apps or Microsoft Word.

       There has yet been no rigorous study of the change in rates of user error before and after adopting BYOD policies. Nonetheless, it's safe to assume that some level of user error is reduced by familiarity and comfort with BYOD devices.

       BYOD can't make your data invulnerable, but combined with good security policies, regular user training and effective data backup, it can make a noticeable difference in the availability and integrity of your company data.

(Disponível em: https://www.wired.com) 

Have you ever wondered what keeps a hot air balloon flying? The same principle that keeps food frozen in the open chest freezers at the grocery store allows hot air balloons to fly. It’s a very basic principle: Hot air rises and cold air falls. So while the super-cooled air in the grocery store freezer settles down around the food, the hot air in a hot air balloon pushes up, keeping the balloon floating above the ground. In order to understand more about how this principle works in hot air balloons, it helps to know more about hot air balloons themselves.

A hot air balloon has three major parts: the basket, the burner, and the envelope. The basket is where passengers ride. The basket is usually made of wicker. This ensures that it will be comfortable and add little extra weight. The burner is positioned above the passenger’s heads and produces a huge flame to heat the air inside the envelope. The envelope is the colorful fabric balloon that holds the hot air. When the air inside the envelope is heated, the balloon rises.

The pilot can control the up-and-down movements of the hot air balloon by regulating the heat in the envelope. To ascend, the pilot heats the air in the envelope. When the pilot is ready to land, the air in the balloon is allowed to cool and the balloon becomes heavier than air. This makes the balloon descend.

Before the balloon is launched, the pilot knows which way the wind is blowing. This means that she has a general idea........................... which way the balloon will go. But, sometimes the pilot can actually control the direction that the balloon flies while.......................................... flight. This is because the air above the ground is sectioned .........................................layers in which the direction of the wind may be different. So even though the pilot can’t steer the balloon, she can fly or higher or lower into a different layer ......................................air. Some days the difference between the direction of the wind between layers is negligible. But other days the difference is so strong that it can actually push the balloon in a completely different direction!