Recent content by athenaroa

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    What is the speed of light in a universe with altered physical constants?

    we find ourselves in a new universe where the rules of relativity still are valid, but aplace in which physical constants may have new values. For instance, in this new universe, a 1 kg mass is now equivalent to 4x10^15 joules. In this new universe, at what approximate speed in M/sec will light...
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    What is the final nucleus after a series of radioactive decays?

    modern physics A certain radioactive nucleus has ' approximate mass' 212 and contains 92 protons. The nucleus undergoes beta decay. The remaining (product) nucleus, still radioactive, undergoes alpha decay, leaving yet a new nucleus. The number of protons in this 'final' new nucleus is:
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    Light Refraction at 40 Degrees: Material 1 to Material 2

    A ray of light strikes an interface between materials 1 and 2 and enters the new material(2). The angle of incidence is 40 degrees. The index in material 2 is 1.5 times that of material 1. The refraction angle is ( in degrees):
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    How far behind a convex lens will the image of a small blue ball be formed?

    A very small blue ball is placed 50cm to the left of a convex lens of height 5 cm and focal length 10 cm. how far (in cm ) behind the lens will the image of the ball be formed.
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    Undergrad Right Hand Rule: Magnetic Field Direction from Current-Carrying Wire

    A vertical wire carries an upward 3 amp current. you are 1.2 m from the wire in a direction 20 deg north of east. You experience a magnetic field ( due to the wire) that is directed in what direction? Yes, you do use the right hand rule, but what direction does the right hand rule tell you?
    • athenaroa
    • Thread
    • Direction Field hand Magnetic Magnetic field Right hand rule Wire
    • Replies: 2
    • Forum: Electromagnetism
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    Undergrad Calculating Magnetic Force of Fe+ ion at a Given Point

    A Fe+ ion is traveling at 200 m/sec in a direction 20 deg south of west at a point. The magnetic field at that point is 0.4 T directed at 10 deg west of south. What is the instantaneous magnetic force that acts on the Fe is how many Newtons?
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    Impedance of circuit with capacitor

    You are given a capacitor( impedance 100 ohms), an inductor (impedance 300 ohms) and a resistor (400 ohms), all connected in series. Determine the impedance( in ohms) of this circuit.
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    A long straight wire carries a (+) current of two amps in a direction

    A long straight wire carries a (+) current of two amps in a direction 30 deg W of N. At apoint 0.5 m from the wire( in a direction 60 deg S of W) the magnetic field that it creates has size of how many Tesla.
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    High School What will be the current in the resistence after 5 minutes?

    At exactly 1:00 pm on a certain day a 10 v potential difference is suddenly applied across a 'real' resistance and generates a current of 0.2 amps in the resistance. The value of the resistance at this moment is about 50 ohms. Let's say the 10 v are held constant and current is allowed to travel...
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    Resistance of parallel resistors

    If resistors of 5 ohm, 20 ohm, 40 ohm, and 50 ohms are parallel with each other, the equivalent resistance would most nearly be how many ohms?
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    Charge on a mass by removing electrons

    HOW MANY ELECTRONS MUST BE REMOVED FROM AN ELECTRICALY NEUTRAL OBJECT, TO LEAVE THE OBJECT WITH A CHARGE OF + 1.92 mCOUL