What is the maximum number of 100-W lightbulbs you can connect in parallel in a 120-V home circuit without tripping the 20-A circuit breaker?
What will be an ideal response?
23
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Why are the layers of ice and dust in Mars's permanent ice caps not all the same thickness?
A. Jupiter's gravity affects Mars's climate. B. Mars's axial tilt has changed over time. C. Mars's orbital eccentricity has changed over time. D. All of these choices are correct.
Assuming you are sitting still as you take this quiz, how would you draw your own worldline on a spacetime diagram?
A) a straight, vertical line B) You would not have a worldline because you are not moving. C) a straight, horizontal line D) a diagonal line
When the Sun becomes a red giant
A) some life on Earth may still be able to survive on the surface B) life will probably not be able to survive even beneath the surface C) life may still be able to survive in the atmosphere D) the Earth will be destroyed
A defibrillator has a 130-mF capacitor charged to 2000 V and an internal resistance of 30 W. If the resistance of the path of the discharge through the patient is 170 W, how much energy is delivered to the patient upon complete discharge of the capacitor?
a. 170 J c. 220 J b. 30 J d. 240 J