physical science

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a red light source and green light source shine on a white screen. so
if a blue object is placed in front of the screen, what color will it be? explain?

  • physical science -

    The combination of red and green light makes yellow light. That is what hits the screen.

    Putting a blue object in the combined light beam removes the red and the green from the light that is reflected by the object. That leaves only black.

  • physical science -

    How much current flows in a 12-watt radio connected to a 120-volt circuit?

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