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3 years ago

Light waves have constructive interference because they are emitted _____.

1 answer:

3 0

Constructive Interference occurs when the crust of one way falls on the crust of other and the trough of one wave falls on the trough of other. This way the points of the wave re-enforce each other resulting in an increased amplitude of the wave.

Since the crust and troughs of two waves are at the same place at the same time, the waves are said to be in phase. So the correct answer to the question is option A.

Light waves have constructive interference because they are emitted <span>In Phase</span>

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Paolo says that his bicycle is hard to pedal.Mia looks at the bicycle and tells him he needs to oil the chain.explain why oiling

laila [671]

Answer:

Less friction

Explanation:

Paolo's bike is too difficult to pedal because there is too much friction in the mechanisms of the bike. To reduce friction, Paolo must oil the chain. This will make the bike run much more smoothly and allow for easier pedalling.

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2 years ago

A proton of mass m is at rest when it is suddenly struck head-on by an alpha particle (which consistsof 2 protons and 2 neutrons

antiseptic1488 [7]

Answer:

3/5 v

Explanation:

The computation of speed will the alpha particle have after the collision is shown below:-

In a perfectly elastic the kinetic energy and collision the momentum are considered.

The velocity of the particles defines the below equation:

$VA_f=(\frac{m_A-m_B}{m_A+m_B})VA_i+(\frac{2m_B}{m_A+m_B})VB_i$

As we know that

$VA_i=v$

$\\VB_i=0$

Here, we consider A is the alpha particle and B is the proton and now by the above values we can solve the equation which is below:-

$VA_f=(\frac{4m-m}{4m+m})v$

$\\VA_f=\frac{3m}{5m}v$

$\\VA_f=\frac{3}{5}v$

Therefore the correct answer is $\frac{3}{5}v$

7 0

3 years ago

28. A reaction in which the products contain more chemical energy than the reactants is (4.7)

Serjik [45]

The answer is B !!!!!!!!! It’s B electrical

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3 years ago

Jane has four glasses of milk. The temperature and the amount of milk in each glass are shown:

SOVA2 [1]

The molecules of milk in Glass B have greater kinetic energy than the molecules of milk in Glass D.

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3 years ago

Social media is not always safe when?

Reika [66]

Answer:

social media is not safe when u start talking to creepy stalker or people who comment about ur body rather than that social media helps make good friend

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3 years ago