An Engineer Uses a River (Minimum Temperature of 4°C) to Cool

question 25

Multiple Choice

An engineer uses a river (minimum temperature of 4°C) to cool his electrical plant, which heats water with a boiler operating at 220°C. His boiler uses 420 kW of energy to heat water to steam. What is the maximum power output under ideal circumstances?

• A) 230 kW
• B) 184 kW
• C) 330 kW
• D) 416 kW

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Definitions:

Sarcomeres

The fundamental units of a muscle's myofibril, responsible for muscle contraction.

Z Line (Disc)

A key component in skeletal muscle fibers that anchors the actin filaments and marks the boundary between sarcomeres.

Motor Unit

A single motor neuron and all the muscle fibers it innervates, functioning as a single operational unit in muscle contraction.

Neuron

A specialized cell transmitting nerve impulses; a nerve cell.