сторінка 73 вправа 1 гдз 11 клас англійська мова Морська 11 рік 2019

 

Відповідь до p. 73 ex. 1:

Skydivers in free fall exceed speeds of 100 miles per hour in seconds. They reach terminal velocity when air resistance on their bodies prevents more acceleration. But in challenger speed skydiving, participants use scientific approaches to go faster.
The peregrine falcon, however, has learned how to reach higher speeds. Ken Franklin decided to find out just how fast the peregrine falcon was. He released a falcon from 15,000 feet and then he jumped out. When Ken reached terminal velocity, he dropped a lure of meat, which the bird chased in an attack dive. A computer attached to the bird recorded a speed of 242 miles per hour.
Mark Calland, who holds the British record for speed skydiving, hopes a method similar to the falcon's will increase his speed for the world championship. His main competitive is Marco Wiederkehr from Liechtenstein.
The average speed of participants' best three jumps is measured with
speedometres attached to their harnesses. Mark's first jump is 302 miles per hour, but Marco's is 312 miles per hour. Mark is still confident because of his special trousers that inflate with air. His body takes the shape of a shuttlecock, giving him more control during a dive. Marco's rubber suit keeps air resistance to a minimum, but he wobbles and loses speed. Mark's final skydive goes beautifully and he manages to take first place.