Question
QUESTION 1 A 500.0 g metal block absorbs 5.875 10 3 J of heat to raise its temperature by 50.0 K. What is the substance?
QUESTION 1
- A 500.0 g metal block absorbs 5.875 103 J of heat to raise its temperature by 50.0 K. What is the substance? Show your work.
Specific Heats of Selected Substances
Substance | C [J/(kgK)] |
Water (ice) | 2,060 |
Iron | 450 |
Aluminum | 897 |
Gold | 130 |
Copper | 385 |
Silver | 235 |
Ammonia (liquid) | 4,700 |
Water (liquid) | 4,180 |
Water (steam) | 2,020 |
Lead | 128 |
Answer:
QUESTION 2
A 5.0 resistor is hooked up in series with a 10.0 resistor followed by a 20.0 resistor. The circuit is powered by a 12.0 V battery.
- Draw a labeled circuit diagram for the circuit described using correct symbols.
- Calculate the equivalent resistance.
- Calculate the voltage drop across each resistor in the circuit.
Answer:
(7 points)
QUESTION 3
A man lifts various loads with the same lever. The distance of the applied force from the fulcrum is 1.50 m, and the distance from the fulcrum to the load is 0.300 m. A graph of resistive force vs. effort force is shown. What is the mechanical advantage of the lever? What is the ideal mechanical advantage of the lever? What is the efficiency of the lever? Show your work.
ANSWER BY COMPUTER SO I CAN COPY PASTE
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