The diagram shows a spectrometer being used to analyze a sample of a solution.

Which letter represents the diffraction grating?

A. W
B. X
C. Y
D. Z

5.5 billion

Hope this helps :)

According to science its 5 billion years

And This Isn't in your option so we can say 4.5 billion years.

The weight is the product of the mass [tex]m[/tex] of the body and the gravity acceleration [tex]g[/tex]:

[tex]W=m.g[/tex]     (1)

Where [tex]g[/tex] is the acceleration due gravity with a value of [tex]9.8\frac{m}{s^2}[/tex] for the Earth

If we want to find the mass, we have to find  [tex]m[/tex] in equation (1):

[tex]m=\frac{W}{g}[/tex]     (2)

[tex]m=\frac{1323N}{9.8\frac{m}{s^2}}[/tex]     (3)

Finally:

[tex]m=135kg[/tex]

Jupiter is the largest planet in our Solar System. Hence, Jupiter has the greatest gravitational attraction in our Solar System.

Gravity is a fundamental interaction in physics that produces attraction between all objects with mass or energy. Of the four fundamental interactions, gravity is by far the least powerful; at the level of subatomic particles, it makes no difference at all.

The motion of planets, stars, galaxies, and even light is controlled by gravity, which is the most important interaction between things at the macroscopic level.

Strength of gravitational force an be expressed as:

E = GM/r²

Where G = universal gravitational constant and M = mass of the planet; r = distance between the planet and the object.

As Jupiter is the largest planet in our Solar System, Jupiter has the greatest gravitational attraction in our Solar System.

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conduction because energy is being conducted throughout the spoon

The handle of a metal spoon warms up when it is placed in a hot bowl of soup because of conduction.

By the process of  Conduction the handle of a metal spoon become warm.

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Answer:

B) the law of reflection

Explanation:

When a light ray reflects off a surface, it obeys the law of reflection.

A few definitions before giving the law of reflection:

- The angle of incidence is defined as the angle between the incident ray and the normal to the surface

- The angle of reflection is defined as the angle between the reflected ray and the normal to the surface

The law of reflection states that:

- The angle of incidence is equal to the angle of reflection

- The incident ray and the reflected ray lie both on the same plane.

The answer is March because they are have an equal amount of sunlight in the vernal equinox which is during the month March.

Answer:    March and September

Explanation:  Equinox is a term that is related to the position of the Earth in relation to the Sun, and this is a short period of time when the plane of the equator passes through the center of the Sun. This happens twice a year and there are spring and autumn equinoxes, more specifically around March 20 and September 23, and then, thanks to the position of the Earth's equator in relation to the center of the Sun, the amount of sunlight is the same in Africa and Europe. So in March and in September.

Answer:

58.8 N

Explanation:

Since the ball is hanging at rest, the net force on the ball must be zero.

There are only two forces acting on the rope:

- Its weight, downward, given by W = mg, where m = 6 kg is the mass of the ball and g=9.8 m/s^2 is the acceleration due to gravity

- the tension in the rope, T, upward

Therefore, the equation for the forces is:

[tex]T-W=0[/tex]

And solving for T, we find:

[tex]T=W=mg=(6 kg)(9.8 m/s^2)=58.8 N[/tex]

Answer will be c for this one!

Particles are objects in motion, so they have kinetic energy. The faster a particle moves, the more kinetic energy it has. Kinetic energy is related to heat. I hope this helps!

Yes without an eletrical current attached there would be no electrons.

The wires are empty of charge when there is no current flowing and no electrons moving through wire.

The charge is the physical quantity which defines the object's electric field. The charged objects creates the electric field around it and attracts or repels another objects coming into that field.

The like charges repels each other and unlike charges attract each other.

When a wire is connected with battery or voltage source and switch is on, the electrons leave from positive terminal and heading towards the negative terminal. Thereby, resulting in flow of current through wire.

Charge q = no of electrons x charge on electrons

Thus, Yes, wires are ever empty of charge.

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Answer:

50 J

Explanation:

The net force acting on the box is given by the algebraic sum of the two forces, so:

[tex]F=10 N -5 N = 5 N[/tex]

The net work done on the box is equal to (assuming the net force is parallel to the displacement of the object)

[tex]W=Fd[/tex]

where

F = 5 N is the net force on the object

d = 10 m is the displacement of the object

Substituting,

[tex]W=(5 N)(10 m)=50 J[/tex]

Mechanical advantage = 4

In this case;

Radius of the screwdriver’s handle = 4 cm

Radius of the shaft  = 1 cm

Therefore,

Ideal mechanical advantage = 4 cm/1 cm

                                                = 4

how does a pedometer help people reach their fitness goals?

a. It measures calories burned.  

b. It usually doubles as an MP3 player and keeps people motivated.  

c. They count steps during a workout.  

d. They measure the number of lifts done per exercise.

Answer:

By counting the steps it allows you to know the distance you have walked or ran.

Explanation:

A pedometer is an instrument that estimates the distance traveled by foot. It does this by recording the number of steps walked.

Some pedometers apps also have a feature that counts the calories burnt and lets you set the number of steps and calories you need to burn daily.

I hope this answer helps you.

The temperature of the gas will be cold, because the atoms move very slow,

Answer:

cold

Explanation:

According to kinetic theory of gases, gases at same temperature have same kinetic energy. The speed (v) of the particles of the gas is directly proportional to the temperature (T) of the gas.

K.E. ∝ T

v ∝ T

In the given situation, the atoms of gas are moving very slowly. This means that the temperature of the gas must be very low. The temperature of the gas would be cold.

Answer:

they move in an orbit of a fixed size and also energy

Answer:

the electrons move by describing circular orbits around the nucleus.

Explanation:

The main characteristic of the Bohr model is that the electrons are located around the nucleus at certain determined distances. Bohr's model is simple and similar to Copernicus' planetary model, where the planets describe circular orbits around the Sun. The electron in an atom describes circular orbits, but the radii have fixed values.

The answer is C could be the moon, and D could be Venus. ;)

The answer is C could be the moon, and D could be Venus Good looks out there

THE LIFE OF A STAR

The star starts as a NEBULA basically like this really pretty universal gas. The gas then starts to attract to each other and sticks around together. In the universe the temperature may vary. When the temperatures are extremely high there is a REACTION aka FUSION that takes place.

Then THERE IS A STARR

The higher the voltage, the lower the current. ... The lower current that accompanies high voltage transmission reduces resistance in the conductors as electricity flows along the cables. This means that thin, light-weight wires can be used in long-distance transmission.

Among the most important characteristics of fuels is their heating value.

oil and gas have relatively high heating values as compared to other locally available materials. they are also easy to burn as they are highly inflammable.

ignition takes less time due to this property.

Answer:

Its B

Explanation:

edg2020

Spectrometer is the tool used by scientists to determine the composition of objects. So, option B is correct.

Spectroscopy is defined as the technique of studying the structure and properties of matter by using radiations.

Here,

The method of spectroscopy is that it analyses matter by using radiations. In this process, the radiations emitted and absorbed by the particles are analyzed. The instrument used is called spectrometer. Thus the absorption spectra and emission spectra of the particle are obtained. From this, the interaction of the particle with the materials in form of energy can be studied. Spectroscopy can be called as the measurement of the matter-energy interactions by means of radiation and their wavelengths as the function of energy. Spectroscopy and its applications have been widely used in many of the theories in physics. Quantum mechanics and relativity theories and many others has been developing their theories by the major applications of spectroscopy. Study of material particles are widely done by spectroscopy

Hence,

Spectrometer is the tool used by scientists to determine the composition of objects.

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b would be the best answer

Answer: B. It is the study of the organization of words into sentences, phrases, and clauses.

Explanation:

A syntax in linguistics can be define as the set of rules, processes, principles that is used to frame and govern the sentences in a particular language. It gives the knowledge of the order, arrangement and framing of the words, punctuation in phrases, clauses and sentences, so as to make them meaningful and understandable.

Answer: C- 70%

Explanation:

Useful energy = 250J-75J = 175J

175J/250J*100= 70%

Efficiency should always be less than 1 or below 100% because every device wastes some energy. You committed a calculating error if you receive a result that is more than 1 or 100% Thus option C is correct.

Efficiency refers to how effectively a technology converts energy input into usable energy output. The percentage of energy delivered in beneficial ways determines a device's efficiency. Either a decimal or a percentage can be used to represent the efficiency.

Any efficiency can be determined by dividing the energy input by the energy output by 100%. This equation serves as a general representation of energy in the form of heat or power.

Therefore, Useful energy = 250J-75J = 175J  175J/250J×100= 70%

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Answer:

Larger than the object

Explanation:

The magnification of a lens/mirror is given by the equation:

[tex]M=-\frac{h_i}{h_o}[/tex]

where

[tex]h_i[/tex] is the size of the image

[tex]h_o[/tex] is the size of the object

from the formula, we see that if M is greater than 1, it means that [tex]|h_i|>|h_o|[/tex]

and so, it means that the image is larger than the object.

The negative sign simply tells if the image is upright or inverted: when M is positive, the image is upright, when M is negative, the image is inverted.

Answer:

Larger than the object

Explanation:

Answer:

The answer is False.

Explanation:

The Light is a form of energy ( known as luminous energy ) that can be perceived by the human eye, therefore it allows us to see what surrounds us. Light is an electromagnetic radiation that spreads in the form of spherical waves in any space, consequently, it is not a mechanical wave.

Answer:

The answer is False.

Magnetize;

2 3 1

Demagnetize;

3 1 2

magnetize :

place in magnetic field,

rub on permanent magnet,

pass electricity through

demagnetize :

place on opposite polarity,

strike,

heat

Velocity and speed are basically the same thing but velocity has a direction and speed does not. Both are the rate at which something or someone moves :)

If there is really no friction and no air resistance, then NO force is needed to keep an object moving in a straight line at constant speed.  Check out Newton's first law of motion again.

Answer:

F = 0 N

Explanation:

Given that,

Mass of the hockey puck, m = 0.2 kg

Speed of hockey puck, v = 8 m/s

As the speed is constant. So, there is no change in the velocity. As a result, the acceleration of the hockey puck is 0. Force is given by :

[tex]F=ma[/tex]

Since, a = 0

F = 0

So, the amount of force needed to keep a 0.2 kg hockey puck moving at a constant speed of 8 m/s on friction less ice is zero newton.

Answer:

plato answer is c?

Explanation: