Why is an MRI so loud?

Why is an MRI so loud?

An MRI is noisy because its magnetic field is created by running electrical current through a coiled wire—an electromagnet. When the current is switched on, there is an outward force all along the coil. And because the magnetic field is so strong, the force on the coil is very large.

How fast was the meteor that killed the dinosaurs?

Scientists calculate that it was blasted into Earth by a 10-kilometer-wide asteroid or comet traveling 30 kilometers per second — 150 times faster than a jet airliner. Scientists have concluded that the impact that created this crater occurred 65 million years ago.

What country’s language is Farsi?

Western Persian (Persian, Iranian Persian, or Farsi) is spoken in Iran, and by minorities in Iraq and the Persian Gulf states. Eastern Persian (Dari Persian, Afghan Persian, or Dari) is spoken in Afghanistan. Tajiki (Tajik Persian) is spoken in Tajikistan and Uzbekistan.

Is a mistletoe a parasite?

Mistletoe is a small evergreen shrub that is semi-parasitic on other plants. Instead of producing roots in the ground, mistletoe sends out root like structures into tree branches, from which it steals water and nutrients. The tree the mistletoe grows upon is known as its host.

How many miles does someone walk in a day?

The fitness gap detected by the pedometer studies is equal to about 30 to 40 minutes of walking each day. One mile of walking covers about 2,000 steps, researchers say. The health community typically urges people to take at least 10,000 steps a day to maintain good health, which is equal to about five miles of walking.

What is a palindrome?

A palindrome is a sentence or group of sentences that reads the same backwards as it does forward: Ex:  ‘Red rum, sir, is murder.’ ‘Ma is as selfless as I am.’ ‘Nurse, I spy gypsies. Run!’  ‘A man, a plan, a canal – Panama.’ ‘He lived as a devil, eh?

Who formulated the first periodic table?

Although precursors exist, Dmitri Mendeleev is generally credited with the publication, in 1869, of the first widely recognized periodic table. He developed his table to illustrate periodic trends in the properties of the then-known elements.

William Marston invented the polygraph, what else is he famous for?

William Marston engineered one of the earliest forms of the polygraph in the early 1900’s. Later he went on to create the comic strip Wonder Woman, a story about a displaced Amazon princess who forces anyone caught in her magic lasso to tell the truth