There was a significantly greater number in this group who reported a desk as being in a tilted position while a tennis ball resting on it remained stationary on the incline.

Although the butterfly effect may appear to be an esoteric and unlikely behavior, it is exhibited by very simple systems: for example, a ball placed at the crest of a hill may roll into any of several valleys depending on, among other things, slight differences in initial position.

This is generally used to knock either the jack or another ball away to attain a more favorable position.

* Ball-in-hand: A ball that the striker can pick up to change its position, for example:

* Lift: A turn in which the player is entitled to remove the ball from its current position and play instead from either baulk line.

A lift is permitted when a ball has been placed by the opponent in a position where it is wired from all other balls, and also in advanced play when the opponent has completed a break that includes hoops 1-back or 4-back.

* Pioneer: A ball placed in a strategic position near the striker's next-but-one or next-but-two hoop, to assist in running that hoop later in the break.

* Rush: A roquet when the roqueted ball is sent to a specific position on the court, such as the next hoop for the striker ’ s ball or close to a ball that the striker wishes to roquet next.

* Scatter shot: A continuation stroke used to hit a ball which may not be roqueted in order to send it to a less dangerous position.

If a team fails to gain ten yards in two downs they usually punt the ball on third down or try to kick a field goal ( see below ), depending on their position on the field.

If any part of the ball reaches any part of the imaginary vertical plane transected by this line while in-bounds and in possession of a player whose team is striving toward that end of the field, this is considered a touchdown and scores six points for the team whose player has advanced the ball to, or recovered the ball in, this position.

To make a strike at the ball with a left to right swing the player must present the flat of the ' face ' of the stick to the ball by ' reversing ' the stick head, i. e. by turning the handle through approximately 180 °( while a reverse edge hit would turn the stick head through approximately 90 ° from the position of an upright forehand stoke with the ' face ' of the stick head.

Tackling is permitted as long as the tackler does not make contact with the attacker or his stick before playing the ball ( contact after the tackle may also be penalised if the tackle was made from a position where contact was inevitable ).

However, should a player cross the zone in an attempt to gain an advantage ( e. g., better position ) their team cedes the ball.

The lowball signal was indicated when the weighted ball, and therefore signal, was at the end of its rope in the low position, indicating stop.

One key difference between the rugby and gridiron variants of the backward pass is that the gridiron lateral is based solely on the path of the ball, unlike in rugby, where it is based on the position of the player.

While a forward pass may only be thrown once per down by the team on offense from within or behind the neutral zone, there are no restrictions on the use of lateral passes ; any player legally carrying the ball may throw a lateral pass from any position on the field at any time, any player may receive such a pass, and any number of lateral passes may be thrown on a single play.

In classical systems, for example a ball trapped inside a heavy box, the particle can move at any speed within the box and it is no more likely to be found at one position than another.

Martínez threw from a low three-quarter position that hid the ball very well from batters, who have remarked on the difficulty of picking up Martínez's delivery.

After the ensuing kickoff, New England lost 13 yards in 3 plays and had to punt again, but got the ball back with great field position when defensive back Raymond Clayborn recovered a fumble from Suhey at their own 46-yard line.

I know that I myself felt that it was a mortal shame for a man to be torn open by a British musket ball, as Isaac had been, yet I also felt relieved and lucky that it had been him and not myself.

`` I'll do as you say, but I'll also play a provisional ball and get a ruling ''.

For example, the Banach – Tarski paradox is neither provable nor disprovable from ZF alone: it is impossible to construct the required decomposition of the unit ball in ZF, but also impossible to prove there is no such decomposition.

The contents of the Darnley urn are also problematic ; they were variously reported to be the remains of a stump, bail or the outer casing of a ball, but in 1998 Darnley's 82-year-old daughter-in-law said they were the remains of her mother-in-law's veil, casting a further layer of doubt on the matter.

In baseball statistics, a hit ( denoted by H ), also called a base hit, is credited to a batter when the batter safely reaches first base after hitting the ball into fair territory, without the benefit of an error or a fielder's choice.

If a batter reaches first base because of offensive interference by a preceding runner ( including if a preceding runner is hit by a batted ball ), he is also credited with a hit.

The sacrifice fly is one of two instances in baseball where a batter is not charged with a time at bat after putting a ball in play ; the other is the sacrifice hit ( also known as a sacrifice bunt ).

A player completes a turn batting when: he strikes out or is declared out before reaching first base ; or he reaches first base safely or is awarded first base ( by a base on balls, hit by pitch, or catcher's interference ); or he hits a fair ball which causes a preceding runner to be put out for the third out before he himself is put out or reaches first base safely ( see also left on base, fielder's choice, force play )

A technical foul gives the opposing team a free throw, and the opposing team is also retained possession of the ball.

Bowls ( also lawn bowls, variants include flat-green bowls and crown-green bowls ) is a sport in which the objective is to roll biased balls so that they stop close to a smaller ball called a " jack " or " kitty ".

His voice became a fixture of both Memorial Stadium and Camden Yards, and his expression " Give that fan a contract ", uttered whenever a fan caught a foul ball, was one of his trademarks – the other being his distinct " Thank Yooooou ..." following every announcement ( He was also known on occasion to say " Give that fan an error " after a dropped foul ball ).

In the late 1960s the D2000, D4000 range was produced ( also known as the TC500 — Terminal Computer 500 ) which had a golf ball printer and a 1K ( 80 bit ) disk memory.

He also dropped the ball.

Harvard would eventually go on to fully adopt the McGill version of the game that included more carrying of the ball and also used an oblong ball that was easier to carry and throw.

Camp is responsible for pioneering the play from scrimmage ( earlier games featured a rugby scrum, and was also the one who decided that teams should have four downs to advance the ball ten yards.

A small portion of exploding gas also escapes through the vent, but this does not dramatically affect the total force exerted on the ball.

Association football goalkeepers also often return the ball to play with drop kicks.

This also made it difficult to pass the ball when very close to one's own end zone, since merely dropping back to pass or kick would result in a safety ( rules of the forward pass at the time required the passer to be five yards behind the line of scrimmage, which would make throwing the forward pass when the ball was snapped from behind one's own five-yard line illegal in itself ).

He noticed that the structure of a corannulene molecule was a subset of football shape, and he hypothesised that a full ball shape could also exist.

Increased use of the forward pass encouraged adoption of a narrower ball, starting with changes in the 1920s which enhanced rifled throwing and also spiral punting.

* bump or hip and shoulder tackle is a legal Aussie rules tactic for both dispossession of the player with the ball and also impeding players involved in a contest but not in possession of the ball.