Marc Attaches a Falling 400-Kg Object with a Rope Through

question 62

Multiple Choice

Marc attaches a falling 400-kg object with a rope through a pulley to a paddle wheel shaft.He places the system in a well-insulated tank holding 30 kg of water.When the object falls,it causes the paddle wheel to rotate and churn the water.If the object falls a vertical distance of 120 m at constant speed,what is the temperature change of the water? (1 kcal = 4 186 J,the specific heat of water is 4 186 J/kg⋅°C,and g = 9.8 m/s²)

• A) 8,140 C°
• B) 3,700 C°
• C) 3.7 C°
• D) 0.6 C°
• E) ​22.2 C°

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Definitions:

Genetic Material

DNA or RNA molecules that carry the genetic instructions used in the growth, development, functioning, and reproduction of living organisms.

Fertilized Egg

A cell formed by the combining of a male and female gamete (sperm and egg) which then begins cell division to develop into an embryo.

Gametes

Reproductive cells (sperm in males and eggs in females) that carry half the genetic information of an individual and can combine to form a new organism.

Zygotes

The initial cell formed when a new organism is produced by the union of sperm and egg cells, representing the earliest developmental stage of the embryo.