Sonic Dash

Sonic Dash is an endless runner platformer video game developed by Hardlight and published by Sega. It was released exclusively on mobile phones, and is the second game in the Sonic the Hedgehog series developed by Hardlight for the platform, the first being the remake of Sonic Jump in 2012. The game was released on March 7, 2013, for iOS, November 26, 2013, for Android, and December 3, 2014, for Windows.

A sequel based on the Sonic Boom franchise, entitled Sonic Dash 2: Sonic Boom, was released on Android devices on July 1, 2015. It was developed by Hardlight, with some assistance from Sumo Digital.

Gameplay

Sonic Dash is played as an endless runner, similar to the Temple Run and Rayman Jungle Run video games. In the game, the player directs Sonic through levels, collecting rings and avoiding obstacles and enemies. Unlike other games in the series, Sonic automatically moves forward at all times, similar to Sonic and the Secret Rings. Players are able to share and compete for accomplishments such as "fastest time" or "longest distance".

Sonic

Sonic or Sonic may refer to:

Companies

Music

Science and technology

Sonic boom

A sonic boom is the sound associated with the shock waves created by an object traveling through the air faster than the speed of sound. Sonic booms generate enormous amounts of sound energy, sounding much like an explosion. The crack of a supersonic bullet passing overhead or the crack of a bullwhip are examples of a sonic boom in miniature.

Causes

When an aircraft passes through the air it creates a series of pressure waves in front of it and behind it, similar to the bow and stern waves created by a boat. These waves travel at the speed of sound, and as the speed of the object increases, the waves are forced together, or compressed, because they cannot get out of the way of each other. Eventually they merge into a single shock wave, which travels at the speed of sound, a critical speed known as Mach 1, and is approximately 1,225 km/h (761 mph) at sea level and 20 °C (68 °F).

In smooth flight, the shock wave starts at the nose of the aircraft and ends at the tail. Because the different radial directions around the aircraft's direction of travel are equivalent (given the "smooth flight" condition), the shock wave forms a Mach cone, similar to a vapour cone, with the aircraft at its tip. The half-angle between direction of flight and the shock wave is given by:

Dash

A dash is a punctuation mark that is similar to a hyphen or minus sign, but differs from both of these symbols primarily in length and function. The most common versions of the dash are the en dash (–) and the em dash (—), named for the length of a typeface's lower-case n and upper-case M respectively.

Usage varies both within English and in other languages, but the usual convention in printed English text is:

EMD Dash 2

The EMD Dash 2 is a line of diesel-electric locomotives introduced by General Motors' Electro-Motive Division (EMD) on January 1, 1972. Designations of these models were those of the former models with "-2" added (e.g., the SD40 was replaced by the SD40-2). They retained the basic specifications of the earlier models in terms of power output and most other features, but introduced a number of improvements to the locomotives' internal systems, specifically the electrical systems. These were intended to improve availability, efficiency, and ease of maintenance.

One major improvement was a modularized electrical control cabinet, allowing maintenance by unit replacement and the use of common parts. These concepts were first tested on the DDA40X.

Changes

Minor externally visible changes common across the whole line include the following: