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3 years ago

Why do you think fixed boundaries ""flip"" waves and loose boundaries do not?

Physics

1 answer:

Vinil7 [7]3 years ago

5 0

Answer:

When the obstacle is fixed, the law of action and reaction, makes the reflected wave is inverted.

When the obstacle is mobile, he mobile point, it moves in the direction of the wave, therefore there is no inversion of it.

Explanation:

Waves when they reach an obstacle behave like a shock, therefore if we use the conservation of momentum the wave must reverse its speed, this explains that the speed changes sign, the wave is reflected.

When the obstacle is fixed, the wave when it reaches the obstacle exerts a force on the point, by the law of action and reaction the point exerts on the wave a force of equal magnitude but in the opposite direction, this reaction force which makes the reflected wave is inverted.

When the obstacle is mobile, this is without friction, when the wave arrives it exerts a force on the mobile point, it moves in the direction of the wave, reaching the maximum amplitude of the incident wave, when it is reflected the point begins to go down along with the wave, therefore there is no inversion of it.

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A man starts his car from rest and accelerates at 1 m/s2 for 2 s. He then continues at a constant velocity for 10 s until

Bumek [7]

Answer: I showed you all calculation . You did not attach any graph to question .

Explanation:

Lets first find Velocity

Vr=o m/s

Ve=?

a=1m/s²

t=2s

----------

a=(Vr-V)/t

1m/s²=Vr-0m/s/2s

2m/s=Vr

Lets find the time neeeded to stop :

a=1m/s²

Vs=2m/s

Vf=0m/s

a=(Vf-Vs)/t

t*1m/s²=2m/s

t=2 s

4 0

3 years ago

Read 2 more answers

Battery of 12 V supplies charge of 1000 C to a device work battery

Y_Kistochka [10]

Answer:

W = 12 kJ

Explanation:

We have,

Voltage of a battery is 12 V

Charge supplied by the battery is 1000 C

It is assumed to find the work is done by the battery in moving the charge. The work done is given in terms of voltage as :

$W=qV\\\\W=1000\times 12\\\\W=12000\ J$

W = 12 kJ

So, the work of 12 kJ is done by battery in moving charges.

5 0

4 years ago

The gravity of Neptune is about 1.1 times the gravity of Earth. How will the mass of an object on Neptune compare with its mass

irina1246 [14]

Gravity has an effect on weight, but not on mass. The mass of the object will be the same on both planets. (choice-C)

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3 years ago

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9. When considering a magnet's force of attraction over a known distance, you would expect the strength of attraction 4 inches a

slavikrds [6]

Answer: B. 16 times

Explanation:

The mathematic expression for a magnetic force $F_{M}$ between two magnets is:

$F_{M}=K_{M}\frac{m_{1}m_{2}}{r^{2}}$ (1)

Where:

$K_{M}$ is a constant

${m_{1}$ and ${m_{2}$ are the magnetic charges, which depends on the size of each magnet

$r$ is the distance beteween both magnets

As we can see, this force in inversely proportional to the square of the distance. This means that if we increase the distance, the magnetic force will decrease.

Now, if we increase this value by 4 inches from 1 inch:

$F_{M}=K_{M}\frac{m_{1}m_{2}}{{(4)}^{2}}$ (2)

$F_{M}=K_{M}\frac{m_{1}m_{2}}{16}$ (3)

This means the strength of attraction will be 16 times weaker.

3 0

4 years ago

I need the named chemical compounds

NemiM [27]

Answer:

1 Acetaldehyde C2H4O

2 Acetamide C2H5NO

3 Acetic acid CH3COOH

4 Acetone C3H6O

Explanation: These are the only ones I know

7 0

3 years ago