Is heat absorbed or released by ice when it melts?
Heat is absorbed.
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Why is it important to look closely at the bands of the interior of a meteorite?
What will be an ideal response?
Using a resistor and two different value capacitors, which of the following combinations in an RC circuit would give the greatest time constant?
a. the resistor in series with both capacitors in series with each other b. the resistor in series with both capacitors in parallel with each other c. the resistor in series with the larger value capacitor d. the resistor in series with the lower value capacitor
Stromatolites date back to approximately
A) 4.6 billion years ago B) 3.5 billion years ago C) 3.85 billion years ago D) 4.0 billion years ago
Two ideal Carnot thermodynamic engines have the same efficiency. One operates between 5.0 × 102 K and 3.0 × 102 K, and the other between 4.0 × 102 K and some lower temperature. What is the lower temperature?
A) 200 K B) 220 K C) 240 K D) 260 K E) 280 K