Stretched wire gives 2 beats per second with a tuning fork when its l
ength is 1.43 m and also when its length is 1.45 m.
the tension bring the same in each case. What is the
frequency of the tuning fork?

, spearheaded by a dense concentration of armoured and motorised or mechanised infantry formations with close air support, breaks through the opponent's line of defence by short, fast, powerful attacks and then dislocates the defenders, using speed and surprise to encircle them with the help of air superiority.[1]

Blockade / Siege / Investment – An attempt to cut off food, supplies, war material or communications from a particular area by force, usually taking place by sea

Clear and hold – A counter-insurgency strategy in which military personnel clear an area of guerrillas or other insurgents, and then keep the area clear of insurgents while winning the support of the populace for the government and its policies.

Coercion – Compelling the enemy to involuntarily behave in a certain way by targeting the leadership, national communications, or political-economic centers

Command of the sea – A degree of naval superiority where a side holds complete control of naval power over opposing forces. Control of the sea is the naval equivalent of Air Supremacy

Counter-offensive – A strategic offensive taking place after the enemy's front line troops and reserves have been exhausted, and before the enemy has had the opportunity to assume new defensive positions. Tactic is usually implemented through surging at the enemy after their attack.

Counterforce – A strategy used in nuclear warfare of targeting military infrastructure (as opposed to civilian targets)

Countervalue – The opposite of counterforce; targeting of enemy cities and civilian populations. Used to distract the enemy.

Decapitation – Achieving strategic paralysis by targeting political leadership, command and control, strategic weapons, and critical economic nodes

Deception – A strategy that seeks to deceive, trick, or fool the enemy and create a false perception in a way that can be leveraged for a military advantage

Defeat in detail – Bringing a large portion of one's own force to bear on small enemy units in sequence, rather than engaging the bulk of the enemy force all at once. Similar to divide and conquer

Denial – A strategy that seeks to destroy the enemy's ability to wage war

Distraction – An attack by some of the force on one or two flanks, drawing up to a strong frontal attack by the rest of the force

Encirclement – Both a strategy and tactic designed to isolate and surround enemy forces

Ends, Ways, Means, Risk – Strategy is much like a three legged stool of ends, ways, means balanced on a plane of varying degree of risk

Enkulette – A strategy used often in the jungle that aims at attacking the enemy from behind.

Exhaustion – A strategy that seeks to erode the will or resources of a country

Feint – A maneuver designed to distract or mislead, done by giving the impression that a certain maneuver will take place, while in fact another, or even none, will.

Flanking maneuver – Involves attacking the opponent from the side, or rear

Guerrilla tactics – Involves ambushes on enemy troops. Usually used by insurgency.

Heavy force – A counterinsurgency strategy that seeks to destroy an insurgency with overwhelming force while it is still in a manageable state

Human wave attack – An unprotected frontal attack where the attacker tries to move as many combatants as possible into engaging close range combat with the defender

Incentive – A strategy that uses incentives to gain cooperation

Indirect approach – Dislocation is the aim of strategy. Direct attacks almost never work, one must first upset the enemy's equilibrium, fix weakness and attack strength, Eight rules of strategy: 1) adjust your ends to your means, 2) keep your object always in mind, 3) choose the line of the least expectation, 4) exploit the line of least resistance, 5) take the line of operations which offers the most alternatives, 6) ensure both plans and dispositions are flexible, 7) do not throw your weight into an opponent while he is on guard, 8) do not renew an attack along the same lines if an attack has failed

Interior lines – Placing one's forces in between the enemy forces and attacking each in turn in order to allow one's forces to have better communications and allows one to mass all of one's forces against a part of the enemies'

Limited war – A war in which the belligerents do not expend all of the resources at their disposal, whether human, industrial, agricultural, military, natural, technological, or otherwise in a specific conflict.[2]

Motitus - A Motitus or Motti is a double envelopment manoeuvre, using the ability of light troops to travel over rough ground to encircle and defeat enemy troops with limited mobility. By cutting the enemy columns or units into smaller groups, a mobile force can restrict the mobility of a stronger enemy and defeat it in detail. The name comes from the Finnish word for a cubic meter of firewood, and the strategy was used extensively during the Winter War.

Explanation:

the correct answer choices are a- b- and d