A Piano Wire Has a Radius of 0

question 55

Multiple Choice

A piano wire has a radius of 0.50 mm. One end is fixed and the other is wrapped around a tuning peg, which has a diameter of 3.5 mm and is 80 cm away. After the wire just becomes taut, the peg is given three full turns. What is the tension in the wire? Young's modulus for steel is
20 × 10¹⁰ N/m².

• A) 3.8 kN
• B) 4.3 kN
• C) 6.5 kN
• D) 8.7 kN
• E) 9.8 kN

---

Definitions:

Left Side Of The Brain

Refers to the left hemisphere of the brain, which is typically associated with logical reasoning, analytical skills, and language processing.

Limb Movements

Physical actions or gestures involving the arms, legs, hands, or feet, often in relation to locomotion or expression.

Cerebral Cortex

The outer layer of the cerebrum in the brain, involved in various high-level brain functions such as sensation, voluntary muscle movement, thought, reasoning, and memory.

Mental Functions

The operations of the brain that are responsible for cognitive activities such as thinking, reasoning, memory, and perception.