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Pavel [41]
2 years ago
13

Which is an example of a wave?

Physics
2 answers:
larisa [96]2 years ago
7 0
A Is the correct answer
Travka [436]2 years ago
4 0

Answer:

The answer is A

Explanation:

Someone shouting to you from across a room

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A 0.2-kg ball moving at 2.0 m/s perpendicular to a wall rebounds from the wall at 1.5 m/s. The impulse given to the ball is:
kiruha [24]

Answer:

J = 0.7 N-s away from wall

Explanation:

Given that,

Mass of the ball, m = 0.2 kg

Initial speed of the ball, u = 2 m/s

Final speed of the ball, v = -1.5 m/s (as it rebounds)

Impulse is equal to the change in momentum. So,

J=m(v-u)\\\\J=0.2\times (-1.5-2)\\\\J=-0.7\ N-m

So, the impulse given to the ball is 0.7 N-m and it is away from the wall. Hence, the correct option is (c).

8 0
3 years ago
Help please <br>the question is in the picture ​
zavuch27 [327]

Answer:

The SI unit of power is the watt

Explanation:

7 0
3 years ago
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An increase in temperature will ___________ the speed of a sound wave?
lbvjy [14]
I think it’s cause no change i think
3 0
3 years ago
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What is the gravitational acceleration close to the surface of a planet with a mass of 9ME and radius of 3RE, where ME and RE ar
Papessa [141]

Answer:

9.78 m/s²

Explanation:

To solve this, we use the gravitational formula

g = GM/r², where

g = acceleration due to gravity

G = gravitational constant

M = mass of the planet

r = radius of the planet

From the question, we got that the mass of the planet is

M = 9ME, where ME = 5.95*10^24

M = 9 * 5.95*10^24

M = 5.355*10^25 kg

Also, the Radius of the planet, R = 3RE, where RE = 6.37*10^6

R = 3 * 6.37*10^6

R = 1.911*10^7 m

On applying the values of both R and M to the equation, we get

g = GM/r²

g = (6.67*10^-11 * 5.355*10^25) / (1.911*10^7)²

g = 3.57*10^15/3.65*10^14

g = 9.78 m/s²

Therefore, the acceleration due to gravity on the planet is 9.78 m/s²

Please vote brainliest if it helped you <3

5 0
3 years ago
What are three examples of constructive forces
Olin [163]
The three main constructive forces are crustal deformation, volcanic eruptions, and deposition of sediment.
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3 years ago
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