Quantity of Heat: If We Use 67 W of Power

question 47

Multiple Choice

Quantity of heat: If we use 67 W of power to heat 148 g of water, how long will it take to raise the temperature of the water from 15°C to 25°C? The specific heat of water is 4190 J/kg ∙ K.

• A) 93 s
• B) 5.3 s
• C) 22 s
• D) 114 h

Differentiate between dependent and independent variables in experimental design.

Comprehend the importance and application of operational definitions in experiments.

Identify the roles of experimental and control groups in research.

Recognize the significance of random assignment and random sampling in minimizing bias.

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Definitions:

SMEs

Small and Medium-sized Enterprises, which are businesses with personnel numbers or financial turnover falling below certain predefined limits.