An Electric Device,which Heats Water by Immersing a Resistance Wire $\Omega$

question 113

Multiple Choice

An electric device,which heats water by immersing a resistance wire in the water,generates 50 cal of heat per second when an electric potential difference of 12 V is placed across its leads.What is the resistance of the heater wire? (Note: 1 cal = 4.186 J)

• A)0.94 \(\Omega\)
• B)0.81 \(\Omega\)
• C)0.58 \(\Omega\)
• D)0.69 \(\Omega\)
• E)1.5\(\Omega\)

Explain how changes in temperature with latitude and season affect ecosystems.

Understand the processes involved in the carbon cycle and the importance of carbon dioxide in ecosystems.

Understand the composition and characteristics of the Earth's atmosphere.

Identify and describe the principal components and processes of the nitrogen cycle.

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Definitions:

Negatively Correlated

Describes a relationship where one variable increases as the other decreases, or vice versa.

Positively Correlated

A linkage between two elements where the elevation of one element correlates with the elevation of the other.

Saturated Fat

A type of dietary fat found in animal products and certain oils, known for raising LDL (bad) cholesterol levels in the blood.

Positively Correlated

A relationship between two variables where they move in the same direction, meaning as one variable increases, the other does as well.