If the current increases in a solenoid, the induced emf acts to


increase the flux.

decrease the flux.

first increase then decrease the flux.

first decrease then increase the flux.

have no effect on the flux.

The direction of an electric field is determined from the behavior of a positive test charge that is set free in the electric field.This charge moves along a distinct vector showing the direction of the electric field  Therefore the answer is b. a positive charge will move in the field.

Ohm's law states that V=IR, where V=voltage, I=current(amps), and R=resistance (in Ohms).

Plugging the values into the above equation yields a resistance in the light bulb of 9.8 ohms

Answer:

1.34 m

Explanation:

For an open-end tube, the frequency difference between two consecutive harmonics is equal to the fundamental frequency of the tube:

[tex]f_1 = f_{n+1}-f_n[/tex]

In this case, we have

[tex]f_{n+1}=576 Hz\\f_n = 448 Hz[/tex]

so, the fundamental frequency is

[tex]f_1=576 Hz-448 Hz= 128 Hz[/tex]

For an open-end tube, the fundamental frequency is also given by:

[tex]f_1 = \frac{v}{2L}[/tex]

where v is the speed of sound and L the length of the tube.

Since we know v = 343 m/s, we can solve the formula for L:

[tex]L=\frac{v}{2f_1}=\frac{343 m/s}{2(128 Hz)}=1.34 m[/tex]

Final answer:

To find the length of the tube, we can use the formula v = fλ, where v is the speed of sound and f is the frequency. By calculating the wavelength for the fundamental frequency and the second harmonic, we can determine the length of the tube. In this case, the length of the tube is approximately 0.595 m.

Explanation:

To determine the length of the tube, we need to find the wavelength of each harmonic. The fundamental frequency corresponds to the first harmonic, so its wavelength is twice the length of the tube. The second harmonic has a wavelength equal to the length of the tube. Using the formula v = fλ, where v is the speed of sound and f is the frequency, we can solve for the length of the tube.

For the fundamental frequency:

v = fλ

λ = v/f

Substituting the values:

λ = (343 m/s) / 448 Hz

For the second harmonic:

λ = (343 m/s) / 576 Hz

Since the wavelength of the second harmonic is equal to the length of the tube, we can solve for the length:

Length = λ = (343 m/s) / 576 Hz

Substituting the values:

Length = (343 m/s) / (576 Hz)

Calculating the length:

Length = 0.595 m

Therefore, the length of the tube is approximately 0.595 m.

Answer:

b. The side the boy is sitting on will tilt downward

Explanation:

Initially, the seesaw is balanced because the torque exerted by the boy is equal to the torque exerted by the girl:

[tex]\tau_b = \tau_g\\W_b d_b = W_g d_g[/tex]

where

Wb is the weight of the boy

db is the distance of the boy from the pivot

Wg is the weight of the girl

dg is the distance of the girl from the pivot

When the boy moves backward, the distance of the boy from the pivot ([tex](d_b)[/tex] increases, therefore the torques are no longer balanced: the torque exerted by the boy will be larger, and therefore the side of the boy will tilt downward.

a. Its mass will decreaseb.

Answer:

A. Air

Explanation:

A thermal insulator is a material that does not let the heat trasmitting through it, or it transmits heat not very efficiently.

Generally, the lower the density of the material, the better insulator the material is: this is because in materials with very low density, particles are very spread apart, so they cannot collide with each other, and so the vibrations of the particles (which determine how hot a substance is) cannot be transmitted very efficiently.

In the options listed in this problem, air is the material with lowest density, therefore it is the best thermal insulator among them.

Answer: A. Air

Explanation: Air is a poor thermal conductor because it's particles are farther apart.

Answer:

a)The temperature of the gas in increased by four times its original value.

Explanation:

For a fixed amount of a gas, the ideal gas equation can be written as follows:

[tex]\frac{pV}{T}=const.[/tex]

where

p is the gas pressure

V is the gas volume

T is the gas temperature (in Kelvins)

For a gas under transformation, the equation can also be rewritten as

[tex]\frac{p_1V_1}{T_1}=\frac{p_2V_2}{T_2}[/tex]

where the labels 1,2 refer to the initial and final conditions of the gas.

In this problem, we have:

- The pressure of the gas is doubled: [tex]p_2 = 2p_1[/tex]

- The volume of the gas is doubled: [tex]V_2=2V_1[/tex]

Substituting into the equation, we find what happens to the temperature:

[tex]\frac{p_1V_1}{T_1}=\frac{(2 p_1)(2V_1)}{T_2}[/tex]

[tex]\frac{1}{T_1}=\frac{4}{T_2}[/tex]

[tex]T_2 = 4T_1[/tex]

So, the correct choice is

a)The temperature of the gas in increased by four times its original value.

Intensity being the physical parameter that describes the sound signal, sound stimulus, at the basilar membrane that we talked about last time. And, loudness being the perception of the sound signal intensity.

hope this helps:)sorry if it doesnt

plz mark brainliest

Final answer:

The perception of sound intensity is known as loudness, measured in phons or more commonly in decibels (dB). Light intensity is perceived as brightness and measured in candelas. The overall perception of sound, including loudness, pitch, and timbre, is processed by the CNS through the encoding of action potentials.

Explanation:

The perception of intensity in sound is commonly referred to as loudness, which is influenced by the physical property of sound wave amplitude. The unit of measurement for loudness is the phon, though more commonly, sound intensity level is measured in decibels (dB). In the case of light, intensity is perceived as luminous intensity or brightness, with the candela as its standard unit. Furthermore, timbre is what distinguishes different sounds at the same pitch and loudness, being influenced by the unique frequencies and intensities produced by an instrument.

The intensity of a stimulus, such as sound, can be encoded in two ways in the nervous system. One is by the rate of action potentials: an intense stimulus generates a rapid train of action potentials. The second method is by the number of receptors activated—the more intense the stimulus, the more receptors stimulated. The Central Nervous System (CNS) integrates these signals, further processing the sensory information into what we perceive.

There's probably a much quicker, easier way to do it, but I don't work with this stuff every day so this is the way I have to do it:

First, I searched the "ionization energy" of Hydrogen on Floogle.  That's how much work it takes to rip the one electron away from its Hydrogen atom, and it's 13.6 eV (electron-volts).

In order to find the frequency/wavelength of a photon with that energy, I need the energy in units of Joules.

1 eV = 1.602 x 10⁻¹⁹ Joule  (also from Floogle)

13.6 eV = 2.179 x 10⁻¹⁸ Joule

OK.  Now we can use the popular well-known formula for the energy of a photon:

Energy = h · (frequency)  

or  Energy = h · (light speed/wavelength)

' h ' is Max Planck's konstant ... 6.626 × 10⁻³⁴ m²-kg / s

Wow !  The only thing we don't know in this equation is the wavelength, which is what we need to find.  That's gonna be a piece-o'-cake now, because we know the energy, we know ' h ', and we know the speed of light.

Wavelength = h · c / energy

Wavelength =

(6.626 x 10⁻³⁴ m²-kg/sec) · (3 x 10⁸ m/s) / (2.179 x 10⁻¹⁸ joule)

Wavelength = 9.117 x 10⁻⁸ meter

That's  91.1 nanometers .

It's not visible light (visible is between about 390 to 780 nm), but it's not as short as I was expecting.  I thought it was going to be an X-ray, but it's not that short.  X-rays are defined as 0.1 to 10 nanometers.  This result is in the short end of Ultra-violet.

(You have no idea how happy I am with this result.  I figured it out exactly the way I showed you, and I never peeked.  Then, AFTER I had my solution, I went to Floogle and searched to see what it really is, and whether I came out anywhere close.  I found it in the article on the "Lyman Series".  It says the wavelength of the energy released by an electron that falls in from infinity and settles in the n=1 energy level of Hydrogen is  91.175 nm !  This gives me a big hoo-hah for the day, and I'm going to bed now.)

Wavelength of the light is about 9.14 × 10⁻⁸ m

[tex]\texttt{ }[/tex]

The term of package of electromagnetic wave radiation energy was first introduced by Max Planck. He termed it with photons with the magnitude is :

[tex]\large {\boxed {E = h \times f}}[/tex]

E = Energi of A Photon ( Joule )

h = Planck's Constant ( 6.63 × 10⁻³⁴ Js )

f = Frequency of Eletromagnetic Wave ( Hz )

[tex]\texttt{ }[/tex]

The photoelectric effect is an effect in which electrons are released from the metal surface when illuminated by electromagnetic waves with large enough of radiation energy.

[tex]\large {\boxed {E = \frac{1}{2}mv^2 + \Phi}}[/tex]

[tex]\large {\boxed {E = qV + \Phi}}[/tex]

E = Energi of A Photon ( Joule )

m = Mass of an Electron ( kg )

v = Electron Release Speed ( m/s )

Ф = Work Function of Metal ( Joule )

q = Charge of an Electron ( Coulomb )

V = Stopping Potential ( Volt )

Let us now tackle the problem !

[tex]\texttt{ }[/tex]

Given:

energy of photon = E = 13.6 eV = 2.176 × 10⁻¹⁸ Joule

Unknown:

wavelength of light = λ = ?

Solution:

[tex]E = h \times \frac{c}{\lambda}[/tex]

[tex]2.176 \times 10^{-18} = 6.63 \times 10^{-34} \times \frac{3 \times 10^8}{\lambda}[/tex]

[tex]2.176 \times 10^{-18} = 1.989 \times 10^{-25} \div \lambda[/tex]

[tex]\lambda = (1.989 \times 10^{-25}) \div (2.176 \times 10^{-18})[/tex]

[tex]\lambda \approx 9.14 \times 10^{-8} \texttt{ m}[/tex]

[tex]\texttt{ }[/tex]

[tex]\texttt{ }[/tex]

Grade: College

Subject: Physics

Chapter: Quantum Physics

[tex]\texttt{ }[/tex]

Keywords: Quantum , Physics , Photoelectric , Effect , Threshold , Wavelength , Stopping , Potential , Copper , Surface , Ultraviolet , Light

The image seen through the eyepiece of a telescope is (option D)a virtual and reduced image.

The answer to this question is d. A virtual and reduced image. When you look through the eyepiece of a telescope, you see a virtual image, meaning that the image appears to be there but is not actually present. Furthermore, the image is reduced in size because the eyepiece acts as a magnifying lens.

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The image seen through a telescope's eyepiece is a virtual and enlarged image. This is due to the nature of the converging lens used in the eyepiece, which refracts light to enlarge and invert the image.

The image that is seen through the eyepiece of the telescope is a virtual and enlarged image. When you look through a telescope, you see a magnified image of the object, but it is not an image that can be projected onto a screen - hence it's termed 'virtual'. This is due to the convex, or 'converging', lens used in the eyepiece of most telescopes. This lens refracts incoming light paths from the objective lens to enlarge and invert the image. So the correct answer to the question 'Which answer best describes the image seen through the eyepiece of the telescope?' would be b. A virtual and enlarged image.

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in my dream i had meet my favorite y o u t u b e r ever and he decided to spend they day with me at my grandparents house. i walked out of the bathroom and he was sitting on my bed playing on his phone and my phone buzzed and i checked it he had given me a shout out on i n s t a but then after lunch we went down to the beach right after high-tide and we went skim boarding we then went fishing and played football with J u j u Smith-S c h u s t e r one of his friends and my favorite NFL player. we got back to the house way after dark ( this is when it gets weird) my grand parents were fuming because it was s o o o late and he did a j e d i mind trick type thing and yeah the next morning he brought J u j u and some other famous people\ y o u t u b e r s (D e e e s t r o y i n g Meek Mill S t e e z y Kane and Travis Scott and they rented out the place for us six and they all gave me a shout out on i n s t a and snap THE END

hope this helps with whatever you needed it for

also can you email me at j t b o u v i e r 9 2 7 4 @ g m a i l . c o m

the ones in spaces are because it wont let me post with them

Answer:

Direction

Explanation:

Answer:

Direction

Explanation:

Refraction: It is a process in which when a light ray passes from one medium to another medium then the direction of light ray changes.

Refraction are of two types

Rare medium: The medium of low refractive index than the other medium in which refraction takes place  is called rare medium.

Denser medium: The medium of high refractive index than other medium in which refraction takes place is called denser medium.

Refraction from rare medium to denser medium: when a light passes from rare medium of low refractive index  to the denser medium of higher refractive index then the light ray bend towards the normal.

Refraction from denser  medium to rare medium: When a light ray passes from denser medium to rare medium then the light will be refracted away from from the normal.

Hence, the refraction involve a change in direction.

sound waves travel through liquids tends to move faster than sound waves travelling through air (gases)

Answer:

The distance between interference fringes increases.

Explanation:

In a double-slit diffraction pattern, the distance of the n-order fringe from the centre of the pattern is

[tex]y=\frac{n \lambda D}{d}[/tex]

where [tex]\lambda[/tex] is the wavelength of the light, D the distance of the screen, and d the separation between the slits.

If we take two adjacent fringes, n and (n+1), their distance is

[tex]\Delta y = \frac{(n+1)\lambda D}{d}-\frac{n\lambda D}{d}=\frac{\lambda D}{d}[/tex]

so, we see that it is inversely proportional to the slit separation, d.

Therefore, if the separation between the slits decreases, the distance between the interference fringes increases.

Answer:

No. The protostellar cloud spins faster in the collapsing stage (stage 1) and becomes much slower in the contraction stage (stage 2)

Explanation:

Once the cloud is so dense that the heat which is being produced in its center cannot easily escape, pressure rapidly rises, and catches up with the weight, or whatever external force is causing the cloud to collapse, and the cloud becomes stable, as a protostellar cloud.

The protostellar cloud will become more dense over thousands of years. This stage of decreasing size is known as a contraction, rather than a collapse. In the contraction stage the cloud has become much slower, and because weight and pressure are more or less in balance. In the first stage of formation, the decrease of size is very rapid, and compressive forces completely overwhelm the pressure of the gas, and we say that the cloud is collapsing.

Iron cannot release energy by fusion.

I would say it would be the weight read.

Only because the Control is the type of liquid and the constants are Size of object and amount of liquid

Answer:

the amount of liquid in which the object was submerged

Explanation:

As we know that spring balance will read the spring force that is exerted by spring on the object

Now when the object is suspended by the spring then in that case the spring force is balanced by the weight so spring will read the correct mass of the object.

Now the object is suspended by the spring and then submerged into the liquid so in that case we can say

[tex]F_{spring} + F_b = mg[/tex]

[tex]F_{spring} = mg - \rho_{liquid}Vg[/tex]

so here the reading will be less and it depends on volume of object and density of liquid

so independent variable will be

the amount of liquid in which the object was submerged

Newton's Second law of motion is

F = m * a   ( force = mass * acceleration).

So if a is constant   then a = F 1 / m1  and  a = F2 / m2  then

F1 /m1 = F2 /  m2 and if  m1 > m2 then

F1 must be greater than F2.

Answer is C.

According to Newton's second law, a more massive object requires more force to accelerate at the same rate as a less massive object.

When two objects of different masses accelerate at the same rate, according to Newton's second law of motion, the more massive object requires more force to accelerate. This is because the force needed to accelerate an object is directly proportional to both the object's mass (m) and its acceleration (a), as described by the equation Fnet = ma. Since we are considering the same acceleration for both objects, the object with the greater mass will necessitate a larger force to achieve that acceleration.

Answer:

b. 1000m/1km

c. 1m/100cm

g. 1m/1000mm

Explanation:

To solve this you just have to keep in mind the conversion tables that meters have and that is given by the latin pre-fixes that are involved in their names:

1 meter.

1 kilo-meter, kilo means a thousand, so a kilo-meter would be a thousand meters.

1 mili-meter, mili means diveded by thousand, that means that there are a thousand mili-meters in a meter.

1 centi-meter, centi means divided by a hundred, so there are a hundred centi-meters in a meter.

That is why those are the correct options.

The standard fractions which represent correct conversion factors (ratios) are: 1000m/1km, 1m/100cm, 1m/1000mm.

This goes to say that:

1000m = 1km

1m = 100cm

1m = 1000mm.

Recall

10mm = 1cm

10cm = 1dm

10dm = 1m

1000m = 1km

In mathematics and science, conversion simply refers to or means the conversion of one unit to another unit of the same quantity is performed using multiplicative or divisive conversion factors. We can convert from one unit of a parameter or quantity to another such as

Learn more about conversions:

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A plane mirror is a highly polished flat surface with a very high capacity to reflect incident light.  

We can understand in a better way how this works with the figure attached:  

1. The incident rays coming from the real object reach the mirror and  

2.are reflected following the law of Reflection.  

3.The prolongation of those reflected rays converge at a point that does not coincide with the actual position of the object. At that point the virtual image of the object is formed.  

4.Then, the reflected divergent rays are captured by our eye converging on the retina.  

Now, the image is said to be virtual because it is a copy of the object that looks as if the object is behind the mirror and not in front of it or on the surface, but it is not really there. However, it can be seen when we focus it with our eyes.  

In addition, the image formed is:  

symmetrical, because apparently it is at the same distance from the mirror  

the same size as the object.  

upright, because it retains the same orientation as the object.

Your answer is B) The natural tendency of systems is to evenly distribute energy until the objects are the same temperature.

Answer:

The correct answer is:

The natural tendency of systems is to evenly distribute energy until the objects are the same.

Explanation:

Thermal equilibrium

When ever two bodies differing in temperatures comes in contact with each other heat flow takes place from hotter body to cooler body in order to establish an equilibrium in which temperature of both the bodies becomes constant.

According to second law of thermodynamics:

When the energy of the system increases, matter moves more freely and change in entropy that is disorderliness of the system increases.

This increase in entropy is due to the energy possessed by the matter particles which has resulted in their motion or movement

With this increase in entropy of system, system will start interacting with its surroundings .And this interaction will results in evenly distribution of energy in its surroundings.

Answer:

D) points down.

Explanation:

The problem can be solved by using the right-hand rule to determine the direction of the magnetic field produced by each wire:

- Thumb: direction of the current in the wire

- The other fingers wrapped around the wire: direction of the magnetic field

So let's apply this rule to both wires:

- Wire on the right:

-- Thumb: direction of current --> toward you

-- Other fingers: direction of magnetic field --> point down (at a point on the left of the wire, which is where we want to determine the total field)

- Wire on the left:

-- Thumb: direction of current -->away from you

-- Other fingers: direction of magnetic field --> point down (at a point on the right of the wire, which is where we want to determine the total field)

So, at the point exactly midway between the two wires, both magnetic fields point down, so when they add together the total field will also point down.

Answer:

diffraction

Explanation:

diffraction occurs when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands

When a laser passes through two closely spaced slits, a pattern of alternating light and dark bands called two-slit interference is observed, resulting from the constructive and destructive interference of the light waves. With a mixture of two colors of light, multiple, colorful interference patterns emerge on the screen.

When a laser shines on a screen after passing through two closely spaced slits, you observe a pattern called two-slit interference. This pattern consists of an array of alternating light and dark bands resulting from constructive and destructive interference of light waves. If the light consists of a mixture of two colors or more, each color will create its own interference pattern, leading to an even more complex pattern with potentially varied colorful bands depending on the wavelengths of light used.

If we use a mixture of light with two different wavelengths, we will see several interference/diffraction patterns superimposed on the screen. The width and spacing of these bands are influenced by the properties of the light like its wavelengths and the dimensions of the slits such as the slit width and separation between the slits. The result on the screen is a spectrum of colors emerging from the overlapping interference patterns of the different wavelengths. This fascinating phenomenon demonstrates the wave nature of light.

Answer:

1/9 of that just outside the smaller sphere

Explanation:

The electric field strength produced by a charged sphere outside the sphere itself is equal to that produced by a single point charge:

[tex]E=k\frac{Q}{r^2}[/tex]

where

k is the Coulomb's constant

Q is the charge on the sphere

r is the distance from the centre of the sphere

Calling R the radius of the first sphere, the electric field just outide the surface of the first sphere is

[tex]E_0=k\frac{Q}{R^2}[/tex]

The second sphere has a radius which is 3 times that of the smaller sphere:

[tex]R'=3R[/tex]

So, the electric field just outside the second sphere is

[tex]E'=k\frac{Q}{R'^2}=k\frac{Q}{(3R)^2}=\frac{1}{9}(k\frac{Q}{R^2})=\frac{E_0}{9}[/tex]

So, the correct answer is 1/9.

The magnetic force acting on an electron moving eastward in a downward-directed uniform magnetic field would be to the north. This is determined by the right-hand rule, and the force direction is reversed because the electron carries a negative charge.

In the given scenario, an electron is moving in a uniform magnetic field that is directed straight downward. According to the right-hand rule, which is used to find the direction of force when a charged particle moves in a magnetic field, the force on the electron would be directed to the north. As electrons carry a negative charge, the force direction would be exactly opposite to that obtained using the right-hand rule.

The magnetic force acting on the electron is given by the Lorentz force law: F = qvBsinθ, where 'F' is the magnetic force, 'q' is the charge of the particle, 'v' is the velocity of the particle, 'B' is the magnetic field strength, and 'θ' is the angle between the velocity and the magnetic field vectors. Because the electron is moving eastward and the magnetic field is directed downward, they are perpendicular to each other (θ=90°). Hence sinθ in the equation becomes 1.

Since the charge of an electron (q) is negative, the direction of the magnetic force will be opposite to what the right-hand rule shows. Therefore, for an electron moving to the east in a magnetic field directed straight downward, the magnetic force will be directed to the north.

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this is because the resistors cause the energy that is flowing through to go at a slower rate and this helps preserve a battery or power source. also it can be used as a trip for a alarm.

As more resistors are added in series to a constant voltage source, the current drawn from the source decreases, and as a result, the power supplied by the source also decreases, assuming the voltage remains constant.

Let's consider Ohm's Law, which states that the current (I) flowing through a circuit is directly proportional to the voltage (V) and inversely proportional to the resistance (R):

[tex]\[ I = \frac{V}{R} \][/tex]

The power (P) dissipated by a resistor is given by:

[tex]\[ P = I^2R \][/tex]

or, using Ohm's Law to eliminate I:

[tex]\[ P = \left(\frac{V}{R}\right)^2R = \frac{V^2}{R} \][/tex]

When resistors are added in series, the total resistance ([tex]R_total[/tex]) is the sum of the individual resistances:

[tex]\[ R_{total} = R_1 + R_2 + R_3 + \ldots \][/tex]

As [tex]R_total[/tex] increases, the current I decreases according to Ohm's Law. However, the power supplied by the source is not solely determined by the current; it is also influenced by the voltage and resistance.

If we keep the voltage constant and increase the resistance by adding more resistors in series, the power supplied by the source can be calculated using the formula:

[tex]\[ P_{source} = V \times I = V \times \frac{V}{R_{total}} = \frac{V^2}{R_{total}} \][/tex]

As [tex]R_{total}[/tex] increases, the denominator in the power equation increases, which means that the power supplied by the source will decrease if the voltage remains constant.

by using Coulumbs Law its 2.95N.

Answer:

E. greater than the angle of incidence.

Explanation:

Snell's law states that:

[tex]n_i sin \theta_i = n_r sin \theta_r[/tex] (1)

where

[tex]n_i, n_r[/tex] are the refractive index of the first and second medium

[tex]\theta_i, \theta_r[/tex] are the angle of incidence and refraction, respectively

For light moving from water to air, we have:

[tex]n_i = 1.33[/tex] (index of refraction of water)

[tex]n_r = 1.00[/tex] (index of refraction of air)

Substituting into (1) and re-arranging the equation, we get

[tex]\sin \theta_r = \frac{n_i}{n_r} sin \theta_i = 1.33 sin \theta_i[/tex]

which means that

[tex]\theta_r > \theta_i[/tex]

so, the correct answer is

E. greater than the angle of incidence.

Light enters air from water. The angle of refraction will be

Refractive Index is the value that calculated from the speed of light ratio in a vacuum to in a second medium of greater density. The refractive index variable is symbolized by the letter [tex]n[/tex] or [tex]n'[/tex] in descriptive text and mathematical equations.

Light enters air from water, the angle of refraction will be greater than the angle of incidence.

When light passed from a less dense to a more dense substance for example passing from air into water, the light is refracted towards the normal. The normal is a line perpendicular (forming a 90 degree angle) to the boundary between the two substances.

Hope it helps!

Grade:  9

Subject:  physics

Chapter:  refraction

Keywords:  The angle of refraction, the angle of incidence

The force of attraction will decrease when objects move apart

Hey I am here to help you.

Newton's law of universal gravation states that every particle attracts every other particles in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers

I believe that this answer was helpful.