A Glass Beaker of Unknown Mass Contains 74 $20.0 ^ { \circ } \mathrm { C }$

question 63

Multiple Choice

A glass beaker of unknown mass contains 74.0 ml of water. The system absorbs 2000.0 cal of heat and the temperature rises $20.0 ^ { \circ } \mathrm { C }$ as a result. What is the mass of the beaker? The specific heat of glass is $0.18 \mathrm { cal } / \mathrm { g } \cdot { } ^ { \circ } \mathrm { C }$ and that of water is $1.0 \mathrm { cal } / \mathrm { g } \cdot \mathrm { C } ^ { \circ }$

• A) 560 g
• B) 540 g
• C) 140 g
• D) 270,000 g

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Definitions:

Test Reliability

The degree to which the results of a test are consistent over time and an accurate reflection of the variable being measured.

Correlation Coefficient

A statistical measure that describes the size and direction of a relationship between two or more variables, typically on a scale from -1 to 1.

Measures

Quantitative or qualitative tools and techniques used to assess or quantify variables of interest in various fields, including psychology.

Poor Reliability

The lack of consistency in a measurement, test, or evaluation, indicating that it cannot be depended on to yield the same results upon repetition.