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3 years ago

When a molecule absorbs IR eletromagnetic energy, what are the vibrational modes affected?

Physics

1 answer:

jok3333 [9.3K]3 years ago

3 0

Answer:

Stretching vibration and bending vibration

Explanation:

1. Stretching vibration results in the variation of the bond length. There are two types of stretching vibration:

In asymmetric bending, bonds move in and out as a result of the vibration.

In symmetric bending, bonds move such that the bond length either gets shorter or longer.

2. Bending vibration results in the variation of the bond angle.

These can be grouped into 4 types:

Rocking- It is that motion in which two atoms are in the motion like that of the motion of a pendulum of a clock.
Scissoring- The motion of to atoms either away from each other or towards each other.
Twisting- It is where the motion of the two atoms resembles that of the motion on a treadmill.
Wagging- It is the motion in V- shape in the back and forth direction.

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The difference between experimental technique and procedure

kaheart [24]

A procedure is all the steps used to do an experiment in order.
<span>the experiment is when you test your hypothesis and is designed to answer your question. </span>
<span>the procedure is all the steps of the experiment.</span>

4 0

4 years ago

Derive equation of motion s=ut+1/2at²

Pavel [41]

Recall the definitions of

• average velocity:

v[ave] = ∆x/∆t = (x[final] - x[initial])/t

Take the initial position to be the origin, so x[initial] = 0, and we simply write x[final] = s. So

v[ave] = s/t

• average acceleration:

a[ave] = ∆v/∆t = (v[final] - v[initial])/t

Assume acceleration is constant (a[ave] = a). Let v[initial] = u and v[final] = v, so that

a = (v - u)/t

Under constant acceleration, the average velocity is also given by

v[ave] = (v[final] + v[initial])/2 = (v + u)/2

Then

v[ave] = s/t = (v + u)/2 ⇒ s = (v + u) t/2

and

a = (v - u)/t ⇒ v = u + at

so that

s = ((u + at) + u) t/2

s = (2u + at) t/2

s = ut + 1/2 at²

4 0

2 years ago

Why do the heights of the tides change over the course of a month?

Y_Kistochka [10]

Answer:

The heights of the tides change over the course of a month due to -

<u>the position of Sun , Moon and Earth .</u>

Explanation:

Tides are formed due to the gravitational attraction of the sun and the moon on the surface of the Earth .

Since , the Moon is closer to Earth as compared to the Sun , Hence , Moon has greater attraction on Earth than Sun .

Moon plays an important role for producing the Tides .

In every 27.3 days , the Earth and the Moon revolves around the common point .

Therefore , in every 27.3 days , a new tidal cycle forms .

Two types of tides are possible , high tide and low tides .

In a day , two high tide and two low tide occurs ,

And because of the angle of Moon with respect to Earth , the two high tides do not have the same height . same for the case of two low tide .

The height of tides differ in the height on a daily basis .

5 0

3 years ago

If the strength of a magnetic field at B is three units the strength of the magnetic field at A is ____?

Tema [17]

If the strength of a magnetic field at B is three units the strength of the magnetic field at A, means that point B has three times more turns as compared to point A.

<h3>How strength of the magnetic field should be increased?</h3>

We can increase the strength of the magnetic field by increasing the number of turns which increases the strength of the current flow.

So we can conclude that point B has three times more turns as compared to point A.

Learn more about magnetic field here: brainly.com/question/14411049

#SPJ1

8 0

2 years ago

It takes me 12s to lift a box upward with 20 N of force to a height of 45m. What was my power output ?

Finger [1]

Answer:

75Watts

Explanation:

Given parameters:

Time = 12s

Force applied = 20N

Height = 45m

Unknown:

Power output = ?

Solution:

Power is defined as the rate at which work is done.

It is mathematically expressed as;

Power = $\frac{work done}{time}$

Work done = force x distance = 20 x 45 = 900J

Power = $\frac{900}{12}$ = 75Watts

6 0

3 years ago