A Glass Beaker of Unknown Mass Contains $74.0 \mathrm { ml }$

question 69

Multiple Choice

A glass beaker of unknown mass contains $74.0 \mathrm { ml }$ of water.The system absorbs $2000.0 \mathrm { cal }$ of thermal energy 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 cal/g ∙ °C,and that of water is 1.0 cal/g ∙ C°.

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

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A variable that affects the operation of a system and can be adjusted to control the system's behavior.

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The points of contact where electrical wires are securely connected to devices, components, or other wires to establish an electrical circuit.

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Variable Frequency Drive, a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the electric motor.

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