§5.7 Echo

• Natuurkunde / Scheikunde
• Middelbare school
• vwo
• Leerjaar 1

§5.7 Echo

Before you do the questions:

1. You are setup in a group through zoom.
2. One of you shares your screen with the presentation on it.
3. Set lessonup to presentation mode.
4. One of you writes down the answers you come to in a word document (if this isn't possible, aks mr. Brands for help)
5. Now you're ready, start the questions

1) What is an echo? How does it work? Explain.

2)What is ultra sound? 

3) What do we use ultra sound for? and why do we use ultra sound instead of regular sound?

4) 

a. What is echolocation and how does it work?

 

b. Give three examples where echolocation is used (you may inclde animals that use it).

6) Little brown bats use echolocation, but megabats don't. Why do little brown bats have an advantage over megabats when it comes to living in caves?

Little brown bat

Megabat

7) Most submarines have powerful lamps. Why do they still require echolocation to detect objects such as wercked ships?

8) Why are the walls in the theater designed to absorb sound?

9) How do you call the effect of echoes effecting the sound of the original source of their sound?

The dutch prime minister is standing in a mountain valley and wants to know how far away the closest mountain to him is. He hits two wooden planks together, producing a loud sound. 5 seconds later he hears the echo. How far away is the mountain closest to him?

Remember to apply 
G
A

F

C

A

A group of hikers walking through a forest finds a cave. One of the hikers makes a loud yell, a moment later an echo comes back. The cave is 500 meters deep. How long does it take before they hear the echo?

A whale uses echolocation to detect objects in its surroundings. The whale creates a high pitch sound and 6.6 seconds later he hears an echo coming back. How far away is the object that the whale has detected in km?

Done?

Start doing the workbook exercises of 5.8 

They are about everything we have coverd about sound, so far.