
During collision between the ball and driver, peak force applied to the ball can be as high as 4000 pounds. A swing of 110-mph can result in the ball going from rest to 150-mph in 0.0005 seconds. In fact, during certain stages of impact, the ball experiences more than 50,000-g’s of acceleration!
Full Answer
How fast does a golf ball travel?
Average Amateur Golf Ball Speed 1 • Scratch or Better – 161 mph 2 • 5 HCP – 147 mph 3 • 10 HCP – 138 mph 4 • Average Golfer (14.5) – 133 mph 5 • Bogey Golfer – 131 mph#N#Female Amateur (Driver) 6 • Scratch or Better – 131 mph 7 • 5 HCP – 125 mph 8 • 10 HCP – 119 mph 9 • 15 HCP – 111 mph More ...
What happens when a golf ball hits the ground?
When a golf ball is hit, the impact, which lasts less than a millisecond, determines the ball’s velocity, launch angle and spin rate, all of which influence its trajectory and its behavior when it hits the ground. A ball moving through air experiences two major aerodynamic forces, lift and drag.
What factors affect the trajectory of a golf ball?
Aerodynamics. When a golf ball is hit, the impact, which lasts less than a millisecond, determines the ball’s velocity, launch angle and spin rate, all of which influence its trajectory and its behavior when it hits the ground. A ball moving through air experiences two major aerodynamic forces, lift and drag.
What is the weight of a golf ball?
Golf ball. A golf ball is a special ball designed to be used in the game of golf . Under the rules of golf, a golf ball has a mass no more than 1.620 oz (45.93 grams), has a diameter not less than 1.680 in (42.67 mm), and performs within specified velocity, distance, and symmetry limits.

How much does a golf ball deform at impact?
Typically, golf balls you'll find compress 0.10-0.12 inches.
What is a good impact position golf?
1:403:46Perfect iron impact position | GolfPass | Golf Channel - YouTubeYouTubeStart of suggested clipEnd of suggested clipInto your armpit. So you're going to feel like that right shoulder gets tighter into your body. AndMoreInto your armpit. So you're going to feel like that right shoulder gets tighter into your body. And then from there i'm going to have my right palm up to the sky.
Do heavier golf balls go farther?
Because the ball is not slowed down as much if it is heavier, it will travel farther than a lighter ball.
How should the golf swing feel at impact?
The golf swing should feel effortless, with minimal tension. Think of it like a coiled spring: as you rotate and load into the backswing, you are storing up energy (just as a coiled spring would) before releasing all that energy – in one sweeping downswing motion – through the ball at impact.
Should your shoulders be open at impact?
For a golfer whose left arm is deeper and more across the chest and right arm stays bent longer, the shoulders should be more open at impact. This will help the golfer's swing move in the direction of the target. For this golfer, the arms are moving slower, or closer to the same speed as the right shoulder.
How do I get more open at impact?
3:177:22BEST ROTATION DRILL TO GET OPEN AT IMPACT - YouTubeYouTubeStart of suggested clipEnd of suggested clipLine swing to the top. Stop start to swing. Down. As my arms and everything moves into. Impact weMoreLine swing to the top. Stop start to swing. Down. As my arms and everything moves into. Impact we want to get these hips a little bit more open than the shoulders we're looking for about.
Do smaller golf balls go further?
A 0.06-inch difference in golf ball diameter doesn't sound like much. But according to golfers who played the two different golf balls back then, the smaller ball provided a bit more distance and was more workable in the wind.
How do I make my golf ball go farther?
2:3011:02Titleist Tips: To Hit the Golf Ball Farther, Get Wide! - YouTubeYouTubeStart of suggested clipEnd of suggested clipNow when i take the club. And i create a steep angle of attack. This club is coming in on this angleMoreNow when i take the club. And i create a steep angle of attack. This club is coming in on this angle right here. Energy is driving in that direction right there or downward.
How much does a professional golf ball weigh?
1.620 ouncesAccording to the USGA Rules of Golf, the weight of the golf ball shall not be greater than 1.620 ounces avoirdupois (45.93 gm).
Should your chest open at impact?
Tour players tend to match their body rotation through impact with their grip. I have observed that usually the more open the chest at impact the stronger the left hand grip of the player and as a result you will tend to see the face looking relatively down coming into impact with an open and active chest.
Should you see the golf ball at impact?
2:345:59WHERE SHOULD YOUR EYES BE AT IMPACT? - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo they're actually when they're hitting through the shot they literally are hitting through becauseMoreSo they're actually when they're hitting through the shot they literally are hitting through because their eyes are coming through toward the target.
Where should my body be at impact?
0:153:13Body at Impact - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe slag and really trying to keep a lot of this lag in to impact how do we go about doing that andMoreThe slag and really trying to keep a lot of this lag in to impact how do we go about doing that and what do we need to feel to get into a better impact position let's take a look.
How can I improve my impact position in golf?
2:438:32Improve Impact Position in the Golf Swing | Magic Drill - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo I need to bend my legs and rotate my legs. Notice how my right heel is coming off the groundMoreSo I need to bend my legs and rotate my legs. Notice how my right heel is coming off the ground that's good. I'll keep that right heel down it locks my hips.
What is the impact position?
A key feature at impact and through impact is a tucked bent trail arm. The trail arm is slightly below the lead arm and the trail wrist has angle to it. This forms a “pushing motion” through impact, a position to trap the ball through impact for a proper strike.
What should my smash factor be?
1.5Generally, 1.5 is an ideal smash factor, but the average golfer's smash factor is only about 1.42, TrackMan says. If an average golfer could achieve a smash factor of 1.5 (by solid, center hits), that would increase ball speed by 8 miles per hour and reduce spin by about 30 percent.
How do you fix an impact position?
2:297:40HOW TO FIX YOUR IMPACT WITH 2 SIMPLE DRILLS - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo what we're really looking for you to do is to try and get your arm in what we call an externallyMoreSo what we're really looking for you to do is to try and get your arm in what we call an externally rotated position at impact.
Why do golf balls have dimples?
The dimple pattern on the ball facilitates this control . The dimples reduce the drag on the surface of the ball, causing it to stay in the air longer. If you're an accomplished amateur with a low handicap you'll probably prefer a golf ball that gives you more control.
How big can a baseball ball be?
A ball must be no smaller than 1.68 inches, but there is no limitation on how large it can be. It must weigh no more than 1.62 ounces, but it can be lighter.
What are the limitations of the USGA?
The USGA puts limitations on the size, weight, speed and the potential distance of golf balls. The initial velocity and distance as tested using USGA equipment is limited, and the standards are updated to reflect the currently available equipment.
Who is the author of Golf Book?
The Golf Book; David Summers. Writer Bio. Brian Hill is the author of four popular business and finance books: "The Making of a Bestseller," "Inside Secrets to Venture Capital," "Attracting Capital from Angels" and his latest book, published in 2013, "The Pocket Small Business Owner's Guide to Business Plans.".
What is a two piece golf ball?
Two-Piece Balls. This is the ball that most ordinary golfers use and they usually comprise of a large core which is then wrapped in a plastic of some kind. For example one of the most popular is the Srixon AD333 which is in its 10th generation.
What are golf balls made of?
Usually these balls are made from one piece of Surlyn plastic and then the dimples are moulded into it.
Why are ionomer covers used in golf?
Thanks to their firmer feel, Ionomer cover balls tend to spin slightly less of the tee, helping to reduce unwanted sidespin that can cause destructive hooks and slices. Because of these characteristics, Ionomer covers usually feature on distance and two or three-piece golf balls.
What is a Srixon ball?
This is the ball that most ordinary golfers use and they usually comprise of a large core which is then wrapped in a plastic of some kind. For example one of the most popular is the Srixon AD333 which is in its 10th generation.
What would you find when you cut a golf ball in half?
There was a time when cutting a golf ball in half would reveal wood or leather but nowadays we are presented with an assortment of colours, materials and thicknesses.
Can you reheat a golf ball?
Urethane is a polymer that has many attributes that are beneficial for a golf ball, most notably its ability to have its toughness and hardness controlled when heat is applied. Because Urethane can be reheated and re-moulded, it allows for more precision and design flexibility.
How many dimples does a golf ball have?
The number of dimples on a golf ball ranges from 400 to 1,000.
How many patents have been granted for golf balls?
Since 1900, there have been more than 5,000 patents granted for golf balls. The impact of club to ball is just a fraction of a second, much quicker than the speed of sound. So, the sound of the ball occurs after you hit it.
What is a multi layer golf ball?
A multi-layered golf ball possess a liquid or solid core with a molded rubber outer core. It's cover is softer and designed for higher spin rates. The softer feel and high spin allows the intermediate golfer more control and better stopping power. These balls are more expensive and not as durable as the two-piece ball.
How fast does a golf ball spin?
Speed. A ball hit off the tee usually goes at speeds roughly at 160 miles per hour. The backspin of a tee is nearly 3,000 revolutions-per-minutes, three times the speed of a car's wheel. A wedge shot can spin at 10,000 revolutions, per minute.
What is a golf ball?
By Timothy Bodamer. The golf ball is a product custom crafted to improve a golfer's game. Although many golfers think the clubs make the game, golf balls are a key part of a successful round of golf. The golf ball is composed of a cover and core.
Why is a golf ball heavier than a golf ball?
The heavier the ball means that it is less resistance to wind and may fly farther. Golf balls are at least 1.68 inches in diameter. A smaller ball may also fly farther than a larger ball if weight is equal because the smaller ball is facing less wind resistance. Bryson DeChambeau and Aaron Rodgers win The Match.
What is the lowest compression golf ball?
These numbers represent the amount of compression of a golf ball. Eighty is the lowest compression that possesses a soft core for a spring-like effect that improves distance. The 80 compression is designed for women, seniors and juniors.
How does impact affect golf ball?
When a golf ball is hit, the impact, which lasts less than a millisecond, determines the ball's velocity, launch angle and spin rate, all of which influence its trajectory and its behavior when it hits the ground.
How big is a golf ball?
The Rules of Golf, jointly governed by the R&A and the USGA, state in Appendix III that the diameter of a "conforming" golf ball cannot be any smaller than 1.680 inches (42.67 mm), and the weight of the ball may not exceed 1.620 ounces (45.93 g). The ball must also have the basic properties of a spherically symmetrical ball, generally meaning that the ball itself must be spherical and must have a symmetrical arrangement of dimples on its surface. Additional rules direct players and manufacturers to other technical documents published by the R&A and USGA with additional restrictions, such as radius and depth of dimples, maximum launch speed from test apparatus (generally defining the coefficient of restitution) and maximum total distance when launched from the test equipment.
How do dimples work in golf?
Lastly, the pattern of dimples plays a role. By regulation, the arrangement of the dimples on the ball must be as symmetrical as possible. However, the dimples don't all have to be the same size, nor be in a uniform distribution. This allows designers to arrange the dimple patterns in such a way that the resistance to spinning is lower along certain axes of rotation and higher along others. This causes the ball to "settle" into one of these low-resistance axes that (golfers hope) is close to parallel with the ground and perpendicular to the direction of travel, thereby eliminating "sidespin" induced by a slight mishit, which will cause the ball to curve off its intended flight path. A badly mishit ball will still curve, as the ball will settle into a spin axis that is not parallel with the ground which, much like an aircraft's wings, will cause the shot to bank either to the left or to the right.
What is a high spin golf ball?
Another consideration is "spin", affected by compression and by the cover material - a "high-spin" ball allows more of the ball's surface to contact the clubface at impact, allowing the grooves of the clubface to "grip" the ball and induce more backspin at launch. Backspin creates lift that can increase carry distance, and also provides "bite" which allows a ball to arrest its forward motion at the initial point of impact, bouncing straight up or even backwards, allowing for precision placement of the ball on the green with an approach shot. However, high-spin cover materials, typically being softer, are less durable which shortens the useful life of the ball, and backspin is not desirable on most long-distance shots, such as with the driver, as it causes the shot to "balloon" and then to bite on the fairway, when additional rolling distance is usually desired.
Why does a golf ball backspin?
Backspin is imparted in almost every shot due to the golf club's loft (i.e., angle between the clubface and a vertical plane). A backspinning ball experiences an upward lift force which makes it fly higher and longer than a ball without spin.
What causes a golf ball to travel further?
The turbulent boundary layer is able to remain attached to the surface of the ball much longer than a laminar boundary with less eddies and so creates a narrower low-pressure wake and hence less pressure drag. The reduction in pressure drag causes the ball to travel further.
What is a golf ball?
A golf ball is a special ball designed to be used in the game of golf .
Why does a golf ball not travel as far?
Dimples are the main factor contributing to speed. A basic explanation is that a smooth golf ball will not travel as far because it creates more drag. A low compression ball will have its dimples closer together to try and max out the amount of distance you can get.
Which golf ball maker puts the most work into getting each golfer the proper compression?
Bridgestone and Wilson are the two ball makers that put the most work into getting each golfer the proper compression. Their research shows that matching your skill and swing speed to the correct compression will help you the most.
What does compression mean in golf?
Compression refers to how much the ball flexes or “smushes” against the club face at impact. When you see a slow-motion shot of a driver hitting a golf ball, it actually bends the ball. When it expands again, it’s launched off the club face.
How to find the right golf ball for you?
Just like choosing clubs, the best way to find the right ball for you will be to test a few of them out. Use a high compression ball for a whole round, then use a low compression ball for the next. Taking a ball on the course is an accurate measure to see if it suits you or not.
How does weather affect your ball?
Weather plays a huge role in how your ball reacts. Not just for compression but for other factors as well that could be a whole other article on its own. Weather affects your compression choice on a broader scale. It all depends on where you play the most.
Why is it important to get a low compression ball?
If you play in colder weather , getting a low compression ball will help the most. At colder temperatures, the ball firms up and makes it hard. The harder it is, the more difficult a time you have trying to get it to flex.
How fast should a golf swing be?
Swing Speed Under 85 mph — At this speed, control should not be as big of a concern as distance. These golfers will benefit most from a low-mid compression ball to squeeze every last yard possible out of your drives.
Golf Ball Positions for Drivers, Woods, Irons, and Wedges
With higher-lofted clubs, you’ll position the ball toward the center of your stance, working your way forward and to your left heel if you’re driving with a right-handed grip.
Golf Ball Positions for the Driver
We’ll start with the big hitter and the club for which the ball should be most forward in the stance — the driver.
Golf Ball Positions for Woods and Hybrids
The golf ball position should gradually move back from the front foot from the driver to the putter.
Golf Ball Positions for Irons
By now, you understand that generally, the ball goes further back in the stance from driver to woods to irons.
Golf Ball Positions for Wedges
For wedges, golf ball positions should be the furthest back, approaching between half and two-thirds of the way back in the stance.
Tips for Stance and How It Relates to Ball Positioning and Your Shot
Your stance and ball positioning go hand in hand for creating magnificent shots.
Can My Stance Cause Me To Top the Golf Ball?
The swing arc is usually why beginner players end up topping the ball. Changing the ball’s position to the centerline is the easiest way to fix the problem.
Why does the golf ball spin less?
Since the air is less dense at high altitudes, the spin has less effect on the ball's flight. The ball's spin generates a lifting force (like the wings of an airplane) as it moves through the air. The thinner the air, the smaller the lifting force. Thus, at higher elevations the trajectory is less influenced by lift, and thus has a "flatter" shape and a more glancing impact with the ground. This produces extra roll, which contributes to the increased distance but also makes it harder to hold the green, even though the spin is the same.
Why does the ball spin less at higher elevations?
It is also sometimes said that the ball spins less at higher elevations. This is false. The amount of spin generated on a given shot is the result of a complicated physical interaction among the club's properties, the ball's properties, and the golfer's swing properties. These aren't going to be directly affected by elevation.
How does altitude affect golf?
Hooking and slicing are reduced in severity due to altitude’s effect on the golf ball. A hook or slice is generated when the ball's spin axis is tilted and the lifting force pulls a little to the left or right (as a result of the golfer imparting some amount of sidespin to the ball) instead of straight up. Thus, instead of just holding the ball up against gravity, the lifting force also pulls to the side, creating the curved trajectory. If the lifting force is less due to lower air density, then the curvature will also be less. At 5,000 ft elevation, the air density is about 14% lower than at sea level, so the lifting force is also about 14% less and the hook or slice will curve about 14% less. It's easier to hit the ball straight, but it's harder to intentionally curve it.
Why does a golf ball fly at high altitudes?
The golf ball flies further in high altitudes mainly due to the change in air density, which decreases as elevation increases. Thinner air exerts less drag force on the ball. The ball moves more easily through the air and doesn't slow down as quickly as it flies, resulting in greater distance.
What is the effect of the spin of a ball on the trajectory of an airplane?
Thus, at higher elevations the trajectory is less influenced by lift, and thus has a "flatter" shape and a more glancing impact with the ground.
What is the lifting force of a 5,000 ft slice?
At 5,000 ft elevation, the air density is about 14% lower than at sea level, so the lifting force is also about 14% less and the hook or slice will curve about 14% less .
How to calculate percentage of distance increase?
However, as a starting point, one can estimate the percentage distance increase (compared to sea level) by multiplying the elevation (in feet) by .00116. For example, at 5,000 ft elevation the increase is about 5,000 x .00116 = 5.8%. Thus, a golfer who drives the ball 250 yards in LA might see an increase of 14.5 yards (5.8% of 250) when playing in Denver (264.5 yards). The percent increase will be less for players with slower swing speeds and/or when hitting a shorter shot. But on a mid to long approach shot, that could still make a one club difference. Not to mention that you'll be about a club closer to the green as a result of the longer drive.
What is golf ball speed?
Golf Ball Speed: What Is It? Summary: Golf ball speed is generated when the club swing speed has direct impact with the golf ball. Generally speaking, the faster the golf ball speed the further the golf ball will travel with the fastest speeds occurring on drives.
How many yards does 1mph add to a golf shot?
You may or may not know but 1mph of ball speed can add 2 yards onto your shots. ( GolfWRX)
Is there a correlation between golf ball speed and golf score?
When it comes to amateur golfers the story is slightly different with slower speeds and a direct correlation between slow golf ball speeds or higher golf scores. According to HankHaney.com these are the average amateur golf ball speeds.
Can you see different ball speeds in golf?
As we’re sure you are aware golfers of all abilities will see different golf ball speeds which will have a great effect when it comes to measuring distances. In fact if we take driver distance as an example you can see just how much of a difference we see in yardages here.
Does golf ball speed matter?
To summarize, golf ball speed matters immensely when it comes to measuring your performance, especially in terms of distance. Sure you may not reach long drive levels such as ____ or Tiger Woods average of ____ or Rory Mcilroy average of ____ but you may be able to add a few MPH which can make a huge difference.
What causes the G force?
For example, a force of 1 g on an object sitting on the Earth's surface is caused by the mechanical force exerted in the upward direction by the ground , keeping the object from going into free fall.
How to measure g-force?
In certain cases, g-forces may be measured using suitably calibrated scales. Specific force is another name that has been used for g-force.
What is the G force?
The gravitational force equivalent, or, more commonly, g-force, is a measurement of the type of force per unit mass – typically acceleration – that causes a perception of weight, with a g-force of 1 g (not gram in mass measurement) equal to the conventional value of gravitational acceleration on Earth, g , of about 9.8 m/s 2.
Which is better, the human body or the g-forces?
The human body is better at surviving g-forces that are perpendicular to the spine. In general when the acceleration is forwards (subject essentially lying on their back, colloquially known as "eyeballs in"), a much higher tolerance is shown than when the acceleration is backwards (lying on their front, "eyeballs out") since blood vessels in the retina appear more sensitive in the latter direction.
Does gravity produce g force?
Gravity acting alone does not produce a g-force, even though g-forces are expressed in multiples of the free-fall acceleration of standard gravity. Thus, the standard gravitational force at the Earth's surface produces g-force only indirectly, as a result of resistance to it by mechanical forces.

Types
- The three types of golf balls are two-piece, multi-layered and high-performance. The two-piece golf balls have a hard cover and solid inner core. The two-piece balls are created for distance and durability. These type of balls are good for beginners as it can hold up to being hit into the trees or hazards. A multi-layered golf ball possess a liquid or solid core with a molded rubber outer core. …
Cover
- The cover of a golf ball varies and it utilized for different type of golf games. Surlyn is a hard resin that is a popular choice among the majority of golfers. It's a hard, cut-resistant covering that creates greater distance, which is more affordable for the average golfer. Balata is a rubber-like material and is softer than surlyn. Balta provides more spin and feel off of the club for the golfer…
Compression
- Golf ball compression is usually broken into three numbers: 80, 90 and 100. These numbers represent the amount of compression of a golf ball. Eighty is the lowest compression that possesses a soft core for a spring-like effect that improves distance. The 80 compression is designed for women, seniors and juniors. The 90 compression is considered ave...
Miscellaneous
- Since 1900, there have been more than 5,000 patents granted for golf balls. The impact of club to ball is just a fraction of a second, much quicker than the speed of sound. So, the sound of the ball occurs after you hit it. A rubber-like balata ball carries up to 15 yards less in cold weather, usually around 32 degrees F, than in warmer summertime temperatures. The number of dimples on a g…
Speed
- A ball hit off the tee usually goes at speeds roughly at 160 miles per hour. The backspin of a tee is nearly 3,000 revolutions-per-minutes, three times the speed of a car's wheel. A wedge shot can spin at 10,000 revolutions, per minute.
Size and Weight
- The United State Golf Association requires that a ball should not weigh more than 1.62 oz. The heavier the ball means that it is less resistance to wind and may fly farther. Golf balls are at least 1.68 inches in diameter. A smaller ball may also fly farther than a larger ball if weight is equal because the smaller ball is facing less wind resistance.
Overview
A golf ball is a special ball designed to be used in the game of golf.
Under the rules of golf, a golf ball has a mass no more than 1.620 oz (45.9 g), has a diameter not less than 1.680 inches (42.7 mm), and performs within specified velocity, distance, and symmetry limits. Like golf clubs, golf balls are subject to testing and approval by The R&A (formerly part of the Royal and Ancient Golf Club of St Andrews) and the United States Golf Association, and those th…
History
It is commonly believed that hard wooden, round balls were the first balls used for golf between the 14th through the 17th centuries. Though they were no doubt used for other similar contemporary stick and ball games, made from hardwoods such as beech and box trees, there is no definite evidence that they were used in golf in Scotland. It is equally, if not more likely, that leather balls filled with cows' hair were used, imported from the Netherlands from at least 1486 o…
Regulations
The Rules of Golf, jointly governed by the R&A and the USGA, state in Appendix III that the diameter of a "conforming" golf ball cannot be any smaller than 1.680 inches (42.67 mm), and the weight of the ball may not exceed 1.620 ounces (45.93 g). The ball must also have the basic properties of a spherically symmetrical ball, generally meaning that the ball itself must be spherical and must have a symmetrical arrangement of dimples on its surface. While the ball's dimples must be sy…
Aerodynamics
When a golf ball is hit, the impact, which lasts less than a millisecond, determines the ball's velocity, launch angle and spin rate, all of which influence its trajectory and its behavior when it hits the ground.
A ball moving through air experiences two major aerodynamic forces, lift and drag. Dimpled balls fly farther than non-dimpled balls due to the combination of these two effects.
Design
Dimples first became a feature of golf balls when English engineer and manufacturer William Taylor, co-founder of the Taylor-Hobson company, registered a patent for a dimple design in 1905. William Taylor had realized that golf players were trying to make irregularities on their balls, noticing that used balls were going further than new ones. Hence he decided to make systematic tests to determine what surface formation would give the best flight. He then developed a patter…
Behavior
Today, golf balls are manufactured using a variety of different materials, offering a range of playing characteristics to suit the player's abilities and desired flight and landing behaviours.
A key consideration is "compression", typically determined by the hardness of the ball's core layers. A harder "high-compression" ball will fly further because of the more efficient transfer of energy into the ball, but will also transmit more of a shock through the club to the player's hands …
Selection
There are many types of golf balls on the market, and customers often face a difficult decision. Golf balls are divided into two categories: recreational and advanced balls. Recreational balls are oriented toward the ordinary golfer, who generally have low swing speeds (80 miles per hour (130 km/h) or lower) and lose golf balls on the course easily. These balls are made of two layers, with the cover firmer than the core. Their low compression and side spin reduction characteristics su…
Marking and personalization
Golfers need to distinguish their ball from other players' to ensure that they do not play the wrong ball. This is often done by making a mark on the ball using a permanent marker pen such as a Sharpie. A wide number of markings are used; a majority of players either simply write their initial in a particular color, or color in a particular arrangement of the dimples on the ball. Many players make multiple markings so that at least one can be seen without having to lift the ball. Marking t…