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Alla [95]
3 years ago
5

The reflection of a sound wave from a wal is called

Physics
2 answers:
WINSTONCH [101]3 years ago
4 0
I think its an echo?
mestny [16]3 years ago
4 0

Answer:

The reflection of a sound wave from a wall is called <u>echo.</u>

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What Species can change over time to adapt to their environment
ryzh [129]

Answer:

Explanation:

Most environments have many niches. If a niche is "empty" (no organisms are occupying it), new species are likely to evolve to occupy it. This happens by the process of natural selection. By natural selection, the nature of the species gradually changes to become adapted to the niche.

3 0
3 years ago
A group of animals have short, narrow legs that are partly webbed. In which environment do these animals MOST LIKELY live? A) de
Burka [1]
I'd say it's answer D) rainforests
7 0
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Find the magnitude of the resultant of forces 6N and 8N acting at 240° to each other
Alexxx [7]

Answer:

magnitude of the resultant of forces is 11.45 N

Explanation:

given data

force F1 = 6N

force F2 = 8N

angle = 240°

solution

we get here resultant force that is express as

F(r) = \sqrt{F_1^2+F_2^2+2F_1F_2cos\ \theta}    ..............1

put here value and we get

F(r) = \sqrt{6^2+8^2+2\times 6\times 8 \times cos240}

F(r) =  11.45 N

so magnitude of the resultant of forces is 11.45 N

6 0
3 years ago
Please help me with both of them
8_murik_8 [283]

Answer:

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21212121512

546213171549895465621324547998995656565656565656565722426579898541321447985331321

Explanation:

4 0
3 years ago
A ball is thrown off the top of a building and lands on the ground below.
natita [175]

Answer:

Mass and velocity.

Explanation:

Kinetic energy <u>is the energy that an object has due to its movement</u>, mathematically it is represented as follows:

K=\frac{1}{2} mv^2

where m is the mass of the object, and v is its velocity at a given point in time.

So we can see that to find the kinetic energy just before the ball hits the gound, we need the quantities:

  • mass of the ball
  • velocity of the ball before it hits the ground

With the knowledge of these two quantities the kinetic energy of the ball  before touching the gound can be determined.

4 0
3 years ago
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