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disa [49]
4 years ago
9

If a longitudinal wave passes a specific point seven times per second, and the distance between wave rarefaction points is 2 met

ers, what is the speed of the wave?
Physics
1 answer:
zavuch27 [327]4 years ago
4 0

Answer: 14 m/s

Explanation:

The speed S of a sound wave is given by the following equation:

S=\lambda f

Where:

\lambda=2 m is the wavelength of the sound wave

f=7 times/s=7 Hz

S=(2 m)(7 Hz)

Hence:

S=14 m/s

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garik1379 [7]

Answer:

Explanation:

Electrical energy is:

E = IVt

E = 210 * 12 * 10\\\\\\E = 25200 J

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3 years ago
A ray of light traveling in glass (refractive index na) reflects at the flat interface between the glass and water (refractive i
pickupchik [31]

Answer:

θr  will increase.

Explanation:

We know that when light travel from one medium to another medium the relationship between refractive index and angle given as

na. sinθa = nb . sinθr

sin \theta _r=\dfrac{n_asin\theta _a}{n_b}

If na is increased (by using a different type of glass) but θa is kept the same then sinθr will also increase.

So answer is θr  will increase.

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3 years ago
How does the force of gravity affects an objects acceleration
MrRissso [65]

Answer:

When objects fall to the ground, gravity causes them to accelerate.

Explanation:

Gravity causes an object to fall toward the ground at a faster and faster velocity the longer the object falls.

3 0
3 years ago
How can humans building a drainage system affect the water cycle?
nasty-shy [4]
Human building a drainage system could affect the water cycle because : 
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This could potentially changed the natural occurrence that usually happened within the water cycle

hope this helps


5 0
3 years ago
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In a game of pool, a cue ball rolls without slipping toward the stationary eight ball with a momentum of 0.23 kg. After the two
IrinaVladis [17]

This question involves the concepts of the law of conservation of momentum.

The magnitude of the final momentum of the eight ball is "0.22 N.s".

According to the law of conservation of momentum:

P_{i1}+P_{i2}=P_{f1}+P_{f2}

where,

P_{i1} = initial momentum of the cue ball = 0.23 N.s

P_{i2} = initial momentum of the eight ball = 0 N.s (since ball is initially at rest)

P_{f1} = final momentum of the cue ball = 0.01 N.s

P_{f2} = final momentum of the eight ball = ?

Therefore,

0.23\ N.s + 0\N.s = 0.01\ N.s+P_{f2}\\\\P_{f2} = 0.22\ N.s

Learn more about the law of conservation of momentum here:

brainly.com/question/1113396?referrer=searchResults

3 0
3 years ago
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