Recent content by Skittles

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    Voltage of Battery in Circuit with Bulb, Battery & Wires

    I'm not sure how to figure this one out: In a circuit with just a bulb, battery, and two wires, 3 amperes of current passes through the light bulb. The resistance of the light bulb is 1.5 ohms. What is the voltage of the battery?
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    AND & OR Circuits: Alarm in Car Explained

    Is the alarm that sounds when you open the door while the lights are on in your car an OR circuit or an AND circuit, and why?
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    Kinetic Energy & Cars: 4x the Energy at 100km/hr?

    I don't understand how kinetic energy works: How much kinetic energy does a car have when it moves at 100 km/hr, as compared with when it moves at 50 km/hr? The answer is 4 times as much, but why?
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    Why Is the Net Force on Both Cars Zero Despite Different Speeds?

    I don't understand this: A slow car moves at a steady 10 km/hr down a straight highway while another car zooms past at a steady 120 km/hr. Which car is has the greater net force on it? The answer is neither, because the net force on each car is zero. Why is it zero?
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