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The number of lines per mm in the diffraction grating is 326.

A diffraction grating is a type of optical instrument obtained with a continuous pattern. The pattern of the diffracted light by a grating depends on the structure and number of elements present.

The given data in the problem is

[tex]\rm \theta[/tex] is the angle formed between the path of the incident light and the diffracted light = 9. 2°

λ is the wavelength of the light=490nm=4.9

N is the number of lines per mm in the diffraction grating=?

n is ordered = 1

The formula for the diffraction grating is;

[tex]n \lambda = d sin\theta \\\\ d = \frac{n \lambda}{sin \theta } \\\\ d = \frac{1 \times 4.90 \times 10^{-7}}{sin 9.2^0 } \\\\ d=3.06 \times 10^{-6} \\\\ d=3.06 \times 10^{-3} \ mm[/tex]

The number of lines per mm is found as;

[tex]\rm N= \frac{1}{d} \\\\ N= \frac{1}{3.06 \TIMES 10^{-3}} \\\\ N=326.8 /mm[/tex]

Hence the number of lines per mm in the diffraction grating is 326.

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E-books have made it easier to carry books across long distances and have made learning  simpler.

In the twenty first century, we have seen a sudden budding of technology  such as have never been. Part of this mordern technology is the introduction of electronic books in several formats such as pdf, epub etc.

These books can be read on computers, ipads, laptops, sart phone etc having the appropriate reader software. These ebooks unlike the paper books have eased the inconvienence associated with carrying  paper books which are often bulky from place to place.

Several ebooks could be housed at once in a  smartphone and carried in the pocket. This has made learning easier than ever. Thus, ebooks are better than paper books.

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Answer:

microwave ovens are better for crispy foods microwaves are better for re heating food or microwave food

Explanation:

Explanation:

do we can say that the first step is finding the acceleration of the object. We do so by saying F = ma

so a = F/m

a = 500 m/s^2

we now have the time, acceleration and initial velocity.

so we can find the final velocity by using one of newtons equations which is: vf = vi + at

so:

vf = 0 + 500 × 12

vf = 6000

note that our initial velocity was zero since the object was initially at rest.

if you still have any doubt dont hesitate to ask for further help.

Answer:

Solution s =ut + ½ at 2 = 0×10 + ½ × 10×10 2 = 1000/2=500 m

Explanation:

The body is accelerating from stationary to a velocity of 100 m/s within 10 seconds. Thus, the distance covered is 500 m.

Acceleration of a moving body is the rate of change in its velocity. Acceleration is a vector quantity having both magnitude and direction. The change in magnitude or direction or both in velocity causes an acceleration in the moving body.

The relation between distance with the velocity, acceleration and time is given as :

s = ut + 1/2 at²

The initial velocity u = 0 here

v = 100 m/s

t = 10 seconds.

acceleration =  100 /10 = 10 m/s²

Then the distance covered is calculated as follows:

s = 1/2 at²

  = 1/2 10 m/s²× 10²

  = 500 m

Therefore, the distance covered by the body is 500 m.

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(a) The work done by the ideal gas during the isothermal exapnsion process is -3.556 J.

(b) The heat added to the gas during this process is 3.556 J.

The work done by an ideal gas in isothermal expansion is change in pressure and volume of the gas. The change in the internal energy of the gas is zero.

The work done by the given ideal gas is calculated as follows;

W = ΔPV

where;

W = (P₂ - P₁)(V₂ - V₁)

W = (7kPa - 9kPa)(8L - 6.222L)

W = -3.556 kPa.L

1 kPa.L = 1 J

W = -3.556 J

ΔU = q + w

where;

0 = q + (-3.556)

q = 3.556 J

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Answer:

Explanation: 10%

The law of physics that this scenario would violate is the law of conservation of energy.

The law of conservation of energy states that energy possessed by an object or physical body can neither be created nor destroyed but can only be transformed from one form to another.

This ultimately implies that, the energy possessed by the rock at the beginning must be equal to the energy possessed by the rock at the end in accordance with the law of conservation of energy.

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The coulombs of charge which are flowing into the house is 400 coulombs.

This is the physical property of matter that causes it to experience a force when placed in an electromagnetic field and its unit is Coulomb.

Electric charge(Q) = It where I is current and t is time

Q = It

 = 200A × 2s

 = 400 coulombs

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Answer:

He did not do it very well.

Explanation:

He did it well ( into negative)

= He didn't do it well....

Answer:

its acceleration is doubled.

Explanation:

If the mass is doubled, then acceleration will be halved.

**halved is to divide into two equal parts**

Since unbalanced forces acts on the spheres, the aim of increasing the release distance of the spheres is to observe the effect of unbalanced forces acting on the spheres.

An experiment is a study whose objective is to study cause and effect relationships. In this case, the students had to increase the distance at which the spheres was released.

The aim of increasing the release distance of the spheres is to observe the effect of unbalanced forces acting on the spheres.

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The expression which one would use to calculate the distance to the star is distance = sq. root. of (luminosity/4pi*apparent brightness)

This is a scalar quantity and refers to how much ground a body has covered.

In a situation where parameters such as luminosity of a star and measured its apparent brightness are known then the distance to the star will be:

Distance= √(luminosity/4pi*apparent brightness)

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Explanation:

dc stands for direct current it won't hurt u if u get in contact with dc but ac will be threatening to life

si unit is same as in ac (alternate current) and it is ampere or amp

what unit of the energy does a power company charge a consumer for

Because of its crystal scructure, usually under normal circumstances aluminum is not magnetic.  This is why the magnet does not stick to the plate. The aluminium material is referred to as a paragmetic material, it shares this classification with other metals such as Lithium and Magnesium.

Answer:

hope this he;ps

Explanation:

power = work ÷ time

time = work ÷ power

time = 5,000 J ÷ 100 W

time = 50 s

Answer:

variable that doesnt change

Explanation:

contolled variable is that variable that does not change throughout the course of the experiment

Answer:

They sit or lay quietly

Explanation:

That's what they are trained to do when they find a explosive device

Answer:

Slick and smooth surfaces mediate friction to a low, allowing an object to speed across it with low resistance.

Explanation:

Answer: i would say true uwu

Explanation:hope this helps!

  ....Max-

Answer:

"One calorie of heat is defined as the amount of heat needed to raise the temperature of one gram of water by one degree Celsius"

Hope this Helps!

Explanation:

One calorie of heat is defined as the amount of heat needed to raise the temperature of one gram of water by one degree Celsius (or one kelvin).

Answer:

5 Oxygen , 3 Carbon dioxide and 3 water

Answer: the answer is 5

The process which involves plants to cause weathering to a seed that falls into a crack in a rock therefore, breaking apart the rock is called Mechanical weathering.

This is defined as the set of weathering processes that break apart rocks into particles (sediment) through physical processes. The most common form of mechanical weathering is the freeze-thaw cycle. Water seeps into holes and cracks in rocks then the water freezes and expands, therefore making the holes larger eventually making the rock split apart.

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Answer:

root-pry

Explanation:

i took the test

Answer:

they are like charges so they magnitude repulsive & direction will be ones left &ones right. but it depends on the axis of rotation.

You are given two particles, each with a positive charge, and a box that is 1 m by 1 m. To arrange the particles to create the weakest electric force between them i put at opposite direction diagonally.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

According to Coulomb's law, the force of attraction or repulsion between two charged bodies is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

To arrange the particles to create the weakest electric force between them i put at opposite direction diagonally.

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The focal length of the converging lens based on the arrow placed  3 centimeters to the left and the imaged formed 3 cm to the right is 1.5 cm.

The focal length of the converging lens is determined by applying the following converging lens formula.

1/f = 1/v + 1/u

where;

1/f = 1/3 + 1/3

1/f = 2/3

f = 3/2

f = 1.5 cm

Thus, the focal length of the converging lens is 1.5 cm.

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Answer:

A solenoid is a long coil of wire wrapped in many turns. When a current passes through it, it creates a nearly uniform magnetic field inside. Solenoids can convert electric current to mechanical action, and so are very commonly used as switches. The magnetic field within a solenoid depends upon the current and density of turns.

Explanation:

hope this helped its pretty long

Explanation:

1) D.

the other answer options don't make any sense in that regard. these 2 forms of energy represent in total mechanical energy.

2) C. Chemistry

3) D. Atoms.

although, protons and neutrons are part of them.

4) B. Input force

5) B. False

friction causes energy to be diverted to doing unwanted and unnecessary things, like creating heat instead of movement.