Berikut ini adalah pertanyaan dari jakasuryiti pada mata pelajaran Ekonomi untuk jenjang Sekolah Menengah Atas
1. Butterfly wing clap explains mystery of flightThe fluttery flight of butterflies has so far been somewhat of a mystery to researchers.Now
researchers at Lund University in Sweden have studied the aerodynamics of butterflies in a wind tunnel.
The results suggest that butterflies use a highly effective clap technique, therefore making use of their
unique wings. This helps them rapidly take off when escaping predators.
The study explains the benefits of both the wing shape and the flexibility of their wings. The
Lund researchers studied the wing beats of freely flying butterflies during take-off in a wind tunnel.
During the upward stroke, the wings cup, creating an air-filled pocket between them. When the wings
then collide, the air is forced out, resulting in a backward jet that propels the butterflies forward. The
downward wing beat has another function: the butterflies stay in the air and do not fall to the ground.
The wings colliding was described by researchers almost 50 years ago, but it is only in this study
that the theory has been tested on real butterflies in free flight. Until now, the common perception has
been that butterfly wings are aerodynamically inefficient, however, the researchers suggest that the
opposite is actually true.
"That the wings are cupped when butterflies clap them together, makes the wing stroke much more
effective. It is an elegant mechanism that is far more advanced than we imagined, and it is fascinating.
The butterflies benefit from the technique when they have to take off quickly to escape from predators,"
says biology researcher Per Henningsson, who studied the butterflies' aerodynamics together with
colleague Christoffer Johansson.
"The shape and flexibility of butterfly wings could inspire improved performance and flight technology
in small drones," he continues.
2021
a. Answer the following questions !
1) Who studied the butterflies’aerodynamics?
2) Where did the scientists do the experiments about the aerodynamics of butterflies?
b. How long has the wings colliding been described by scientists?
c. The sentence below is based on the paragraph above. Please answer the following question!
This helps them rapidly take off when escaping predators
What does the word this refer to?
d. What is the main idea of paragraph three ?
READY WA O896-55OO-5OOO.
researchers at Lund University in Sweden have studied the aerodynamics of butterflies in a wind tunnel.
The results suggest that butterflies use a highly effective clap technique, therefore making use of their
unique wings. This helps them rapidly take off when escaping predators.
The study explains the benefits of both the wing shape and the flexibility of their wings. The
Lund researchers studied the wing beats of freely flying butterflies during take-off in a wind tunnel.
During the upward stroke, the wings cup, creating an air-filled pocket between them. When the wings
then collide, the air is forced out, resulting in a backward jet that propels the butterflies forward. The
downward wing beat has another function: the butterflies stay in the air and do not fall to the ground.
The wings colliding was described by researchers almost 50 years ago, but it is only in this study
that the theory has been tested on real butterflies in free flight. Until now, the common perception has
been that butterfly wings are aerodynamically inefficient, however, the researchers suggest that the
opposite is actually true.
"That the wings are cupped when butterflies clap them together, makes the wing stroke much more
effective. It is an elegant mechanism that is far more advanced than we imagined, and it is fascinating.
The butterflies benefit from the technique when they have to take off quickly to escape from predators,"
says biology researcher Per Henningsson, who studied the butterflies' aerodynamics together with
colleague Christoffer Johansson.
"The shape and flexibility of butterfly wings could inspire improved performance and flight technology
in small drones," he continues.
2021
a. Answer the following questions !
1) Who studied the butterflies’aerodynamics?
2) Where did the scientists do the experiments about the aerodynamics of butterflies?
b. How long has the wings colliding been described by scientists?
c. The sentence below is based on the paragraph above. Please answer the following question!
This helps them rapidly take off when escaping predators
What does the word this refer to?
d. What is the main idea of paragraph three ?
READY WA O896-55OO-5OOO.
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Last Update: Thu, 10 Aug 23