# data[].attributes.body
1. Serve

2. Forehand

3. Backhand

4. Volley

5. Overhead smash

6. Drop shot

7. Slice

8. Lob

# data[].attributes.body
The non-polar dirt particle is surrounded by soap micelles, which are clusters of soap molecules in which the hydrocarbon chains are attracted to each other by Van der Waals forces (dispersion forces, London forces, weak intermolecular forces), with the anion heads attracted to the surrounding water.

https://www.ausetute.com.au/soaps.html#:~:text=Soap%20micelles%2C%20clusters%20of%20soap,attracted%20to%20the%20surrounding%20water.

# data[].attributes.body
Cohesion is what holds water molecules together in plants. Surface tension is an intermolecular attraction mechanism that allows liquids to create a top or outer layer that acts like a thin film.

https://study.com/academy/lesson/capillary-action-in-plants-definition-examples-quiz.html#:~:text=For%20plants%2C%20cohesion%20keeps%20the,a%20thin%20film%20of%20sorts.

# data[].attributes.body
Individual sugar molecules are kept together by intermolecular attractive interactions in solid sugar. Water dissolves sugar by disturbing the attraction forces between the sugar molecules, but it does not break the covalent bonds between the carbon, hydrogen, and oxygen atoms.

https://chem.libretexts.org/Courses/Sacramento_City_College/SCC%3A_CHEM_330_-_Adventures_in_Chemistry_(Alviar-Agnew)/06%3A_Gases_Liquids_Solids_..._and_Intermolecular_Forces/6.04%3A_Forces_in_Solutions#:~:text=Solid%20sugar%20consists%20of%20individual,%2C%20hydrogen%2C%20and%20oxygen%20atoms.

# data[].attributes.body
Water possesses strong hydrogen bond dipole-dipole intermolecular forces, giving it a high surface tension and a high heat of vaporization, making it a strong solvent.

https://sciencing.com/what-intermolecular-forces-are-present-in-water-13710249.html

# data[].attributes.body
Drying: As the liquid solvent evaporates or is absorbed by the substrate, the solid adhesive is left behind, causing the bond to form.

# data[].attributes.body
Baseline – Ang mga baseline ay ang mga linya sa magkabilang dulo ng court na tumutukoy sa mga hangganan ng laro na pahaba. Doon din nagseserve ang isang manlalaro.

Center Mark – Tinutukoy ng sentrong marka ang dalawang hati ng tennis court. Pangunahing nakakatulong ito sa service upang matukoy kung saan dapat tumayo ang isang manlalaro bago serve.

Center Line – Hinahati ng gitnang linya ang dalawang service box sa isang natatanging kaliwang service box at kanang service box sa magkabilang gilid ng court. Ang pag-landing ng isang serve sa linya ay itinuturing na maayos na serve.

Net – Ang net ay may taas na 3 talampakan at 6 na pulgada kung saan nakalagay ang mga poste habang ang gitna ng net ay 3 talampakan ang taas, na ang mga poste ay 3 talampakan sa labas ng court sa magkabilang gilid. Ang pagtama ng bola sa net ay itinuturing na out habang ang anumang bola na tumama sa net cord at mahulog sa kabilang panig ay itinuturing na mabuti maliban sa isang serve, na nagbibigay-daan para sa re-do, o let.

Service Line – Ang linya ng service ay naghihiwalay sa forecourt mula sa back court, at minarkahan din nito ang haba ng service box.

Singles Sideline – Ang singles sideline ay ang pinakaloob na linya na pahaba at tinutukoy ang hangganan ng laro para sa mga single na laban pati na rin ang lapad ng service box.

Doubles Sideline – Ang doubles sideline ay ang pinakalabas na linya na pahaba at ginagamit lamang sa mga double matches.

# data[].attributes.attachment_link.description
Knowing the rules of tennis are essential if you want to understand or learn how to play tennis. So, here are all the tennis rules you’ll need to know.

# data[].attributes.body
The London dispersion force is the weakest intermolecular force. The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. This force is sometimes called an induced dipole-induced dipole attraction.

https://www.chem.purdue.edu/gchelp/liquids/dipdip.html#:~:text=Dipole%2Ddipole%20forces%20are%20attractive,to%2020%20kJ%20per%20mole.

# data[].attributes.body
Dipole-dipole forces are attractive forces between the positive end of one polar molecule and the negative end of another polar molecule. Dipole-dipole forces have strengths that range from 5 kJ to 20 kJ per mole.

https://www.chem.purdue.edu/gchelp/liquids/dipdip.html#:~:text=Dipole%2Ddipole%20forces%20are%20attractive,to%2020%20kJ%20per%20mole.

# data[].attributes.body
Hydrogen bonding is a special type of dipole-dipole attraction between molecules, not a covalent bond to a hydrogen atom. It results from the attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as an N, O, or F atom and another very electronegative atom. Hydrogen bonding is a special type of dipole-dipole attraction between molecules, not a covalent bond to a hydrogen atom. It results from the attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as an N, O, or F atom and another very electronegative atom.

https://www.chem.purdue.edu/gchelp/liquids/hbond.html#:~:text=Hydrogen%20bonding%20is%20a%20special,and%20another%20very%20electronegative%20atom.

# data[].attributes.body
An ion-dipole force is an attractive force that results from the electrostatic attraction between an ion and a neutral molecule that has a dipole.

Most commonly found in solutions. Especially important for solutions of ionic compounds in polar liquids.

https://www.chem.purdue.edu/gchelp/liquids/iondip.html#:~:text=An%20ion%2Ddipole%20force%20is,ionic%20compounds%20in%20polar%20liquids.

# data[].attributes.body
Ion-ion forces, also known as ionic bonding, are the simplest to understand. These forces arise from the electrostatic attraction between two ions with opposite charges. They are not technically considered intermolecular forces, but are a helpful starting point for understanding the true IMFs (intermolecular forces). Ionic bonds are also generally stronger than the forces discussed below, which is why most pure salts are solids except at extremely high temperatures.

https://chemistrytalk.org/intermolecular-forces/#:~:text=Ion%2Dion%20forces%2C%20also%20known,true%20IMFs%20(intermolecular%20forces).

# data[].attributes.body
Ion-ion force

Ion-dipole force

Hydrogen Bond force

Dipole-dipole force

London Dispersion Force

# data[].attributes.body
HELMET

The use of helmet is increasing, and the awareness towards head injuries is also on the increase. All these factors are useful in reducing risk of head injury.

Method
Electronic Model
- An electronic device that is put on the helmet measuring the force of the impact.

https://www.mysciencework.com/publication/download/force-measuring-helmet/d5c30ef3e53c1cf17c1bb81d12185a85

# data[].attributes.body
Van der Waals forces may arise from three sources. First, the molecules of some materials, although electrically neutral, may be permanent electric dipoles. Because of fixed distortion in the distribution of electric charge in the very structure of some molecules, one side of a molecule is always somewhat positive and the opposite side somewhat negative. The tendency of such permanent dipoles to align with each other results in a net attractive force. Second, the presence of molecules that are permanent dipoles temporarily distorts the electron charge in other nearby polar or nonpolar molecules, thereby inducing further polarization. An additional attractive force results from the interaction of a permanent dipole with a neighbouring induced dipole. Third, even though no molecules of a material are permanent dipoles (e.g., in the noble gas argon or the organic liquid benzene), a force of attraction exists between the molecules, accounting for condensing to the liquid state at sufficiently low temperatures.

# data[].attributes.body
The forces are named for the Dutch physicist Johannes Diderik van der Waals, who in 1873 first postulated these intermolecular forces in developing a theory to account for the properties of real gases.

https://www.britannica.com/science/van-der-Waals-forces

# data[].attributes.body
A theory of the attractive molecular forces between solid bodies separated by a narrow gap. This theory was macroscopic in character, and in it the interaction between the bodies was considered to be caused through the intermediary of the fluctuating electromagnetic field. The attractive force itself was then evaluated as the appropriate component of the Maxwell stress tensor of the electromagnetic field at the surface of the body.

https://www.sciencedirect.com/topics/mathematics/molecular-force

# data[].attributes.body
Serena Williams
Rank 1
Edad: 41
Lugar ng kapanganakan: Saginaw, Michigan
Naging pro: 1995
Taas: 1.75m

https://edition.cnn.com/2013/09/13/us/serena-williams-fast-facts/index.html

# data[].attributes.body
Daniil Medvedev
Rank 1
Edad: 26
Lugar ng kapanganakan: Moscow, Russia
Naging pro: 2014
Plays: Right-handed, Two-handed backhand
Timbang: 182lbs (83kg)
Taas: 6'6'' (198cm)
Coach: Gilles Cervara

https://www.atptour.com/en/players/daniil-medvedev/mm58/overview

# data[].attributes.attachment_link.description
Official tennis player profile of Daniil Medvedev on the ATP Tour. Featuring news, bio, rankings, playing activity, coach, stats, win-loss, points breakdown, videos, and more.

# data[].attributes.body
Tennis shoes

Tennis racket

Tennis ball

Tennis clothes

Tennis court

Tennis cup

# data[].attributes.body
Ang mga Tennis Ball ay may diameter na 2.575"-2.7" (6.54-6.86 cm) at circumference na 8.09"-8.48" (20.6-21.5 cm). Ang bigat ng isang Tennis Ball ay dapat nasa pagitan ng 1.975-2.095 oz (56-59.4 g).

# data[].attributes.body
TENNIS RACKET HEAD SIZES:

OVERSIZE: 105” or larger

MID PLUS: 98” to 104”

MIDSIZE: 85” to 97”

TENNIS RACKET WEIGHTS:

LIGHTWEIGHT FRAME: 9 – 9.7oz / 255 – 275g

MEDIUM FRAME: 9.8 – 11oz / 275 – 310g

HEAVY WEIGHT FRAME: 11oz / 310g or heavier

https://www.wilson.com/en-us/blog/tennis/how-tos/how-choose-tennis-racket

# data[].attributes.attachment_link.readable_text
As one of the longest-running tennis equipment brands in the world, we know there are many different types of tennis players. Our job is to make a racket for each one of them. Wilson offers four key racket lines that each focus on a specific performance benefit, those being Precision, Feel, Power and Control. Once a player knows what benefit they are looking for out of their racket, we have varying weights and head sizes that provide an additional level of customization for any type of player.

Selecting the Right Tennis Racket for Your Skill Level

Before you can select the best tennis racket for your level of play, it's important to understand two elements of racket construction: head size and weight.

Tennis Racket Head Sizes:

OVERSIZE: 105" or larger

MIDPLUS: 98" to 104"

Tennis Racket Weights:

LIGHTWEIGHT FRAME: 9 - 9.7oz / 255 - 275g

MEDIUM FRAME: 9.8 - 11oz / 275 - 310g

HEAVY WEIGHT FRAME: 11oz / 310g or heavier

Beginner Tennis Players

Players first learning the game of tennis should start with a light racket featuring a larger head size, often called an "oversize" racket. This will help them make contact with the ball consistently while learning to rally without wearing out their arm as their muscles get used to the game.

When choosing a tennis racket for a beginner, here are a few things to look for:

Wilson's Ultra or Triad are great rackets for beginner tennis players. Curious about more? Wilson has curated a collection of beginner tennis rackets to make choosing the right racket easy.

Intermediate Tennis Players

Intermediate players can start to reduce their head size and add a little more weight to their racket as their tennis muscles develop and they learn to generate more pace on their own. Doing these two things will allow them to keep their new-found power under control.

When selecting a racket for intermediate tennis players, keep the following in mind:

Oversize or Midplus head size

Medium weight frame

Less power generated from the racket, more control

For intermediate tennis players, check out Wilson's Clash or Blade tennis rackets.

Advanced Tennis Players

Advanced players should be using "mid-size" rackets that allow them to play with control, feel and precision. These three benefits will provide a more connected-to-the-ball feel, allowing players to play more confidently as they go for their shots.

When selecting a racket for advanced tennis players, keep the following in mind:

Midplus to Midsize head size

Medium to heavy weight frame

Rackets optimized for control and feel, such as Blade or Pro Staff.

Choosing a Racket for Your Swing Style

Regardless of your swing style, Wilson has a racket built just for you. Players who play with shortened or flat swings typically prefer their rackets to generate power. For this swing style, beginners or intermediate players should go for the Ultra tennis racket while more advanced players should grab a Pro Staff.

Players who play with more modern, vertical swings typically want their rackets to generate more control and feel. Beginners or intermediate players should start with Clash while advanced players will feel most confident with Blade.

Tennis Racket Construction

When choosing a racket, there are three elements which affect power and control: headsize, weight, and string pattern.

Larger Headsize = More Power; Smaller Headsize = More Control

Lighter Racket = More Power; Heavier Racket = More Control

Open Stringbed = More Power; Denser Stringbed = More Control

Stringing Rackets

Beginners to Intermediate players, seniors, or those suffering from tennis elbow, should play with multifilament string while Advanced players can have a go at polyester string.

Players should typically string multifilament (synthetic gut) from 53 to 55 lbs to start, and then adjust from there. Higher tension = more control, while lower tension = more power.

If stringing as a hybrid (half poly/half multi), string the polyester 2 lbs below the multifilament. Typically, you should avoid string polyester above 54 lbs as it is already a very stiff material.

To learn more about how to string tennis rackets, check out Wilson's racket stringing guide.

Racket Grip Sizes

Racket grip sizes are measured 0 through 5, or in the US, 4(0) - 4 5/8. Most adult women find success with a 4 ¼ (grip size 2) while men typically gravitate towards 4 3/8 (grip size 3).

However, recent trends have seen players using smaller grip sizes to generate more spin.

If you're unsure about what grip size is best for you, it's always best to go with a smaller handle because you can use overgrip to build up the thickness of the handle.

The Leaders in Racket Innovation

For decades, Wilson has been the leader in tennis racket innovation. Our team has spent thousands of hours on engineering to fine-tune the perfect racket for all levels of play. One of the innovations which makes Wilson unique is our latest patent-protected technology, "3D Bending," built into our entire line of rackets.

3D Bending ™ has to do with the three bending moments that occur when a racket makes contact with the ball. Horizontal bending is the forward-to-backward bending that occurs during a flat, or "traditional" swing, increasing control. Vertical bending is the up-and-down bending that occurs during a vertical, or "modern" swing, increasing dwell time and spin. Torsional bending is the twisting that occurs, stabilizing swings on off-center hits. Wilson has mastered how to adjust these three key bending moments to optimize different rackets for different players.

Consistently pushing the envelope of tennis racket technology, Wilson has developed a line of tennis rackets by exacting quality standards for ultimate playability. You can explore our entire collection of tennis rackets, strings, and accessories, or customize your own racket for a one-of-a-kind playing experience.

Need Help Choosing the Perfect Racket?

Still need help choosing? Let us help you find the perfect tennis racket using Wilson's racket selector tool.

# data[].attributes.attachment_link.description
Discover how to choose the best tennis racket for you. Whether you're looking for a beginner tennis racket, or seeking a racket to give you the perfect combination of power, spin and control, let Wilson be your guide to finding the perfect tennis racket for every type of player.

# data[].attributes.body
Haba ng tennis court

Ang haba ng tennis court ay 23.77m. Parehas lang sa singles at doubles court.

Doubles tennis court dimensions

Ang doubles tennis court ay may habang 23.77m at laki na 10.97m, ang haba simula sa net ay 6.4m. Ang kabuuang sukat ng court ay 260.87m².

Haba ng tennis court

Ang karaniwang haba ng tennis court ay 10.97m, na may roong guhit sa magkabilang gilid at ang sukat ay 1.37m. Ang laki ng singles court is 8.23m.

Sukat ng singles tennis court

Ang single tennis court may habang 23.77m at laking 8.23m, ang haba simula sa net ay 6.4m. Ang kabuuang sukat ng court ay 195.65m².

https://www.harrodsport.com/advice-and-guides/tennis-court-dimensions#:~:text=A%20tennis%20court%20is%2078ft,6.4m)%20from%20the%20net.

# data[].attributes.body
Tennis, ang orihinal na pangalan nito ay lawn tennis, isang laro kung saan ang dalawang tao ay magkalaban (singles) o kaya apat na tao ang magkakalaban (doubles) gamit ang isang raketa para matamaan ang bola na may tinutukoy na laki, bigat, at upang tumalbog sa ibabaw ng net sa isang parihabang court. Magkakaroon ng puntos ang isang manlalaro kapag ang kalaban ay hindi naibalik nang maayos.

https://www.britannica.com/sports/tennis