Auroras are most brilliant during periods of increased solar activity
Indicate whether the statement is true or false
TRUE
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A negatively-charged rod is brought close to (but does not touch) two neutral spheres that are in contact with each other but insulated from the ground. If the two spheres are then separated, what kind of charge will be on the spheres?
A) The sphere near the charged rod becomes negative and the other one becomes positive. B) Both spheres become negative. C) The sphere near the charged rod becomes positive and the other one becomes negative. D) The spheres do not get any charge. E) Both spheres become positive.
Which of the solar system objects listed below is most similar to Earth in terms of mass and density?
a. Mercury b. the Moon c. Venus d. Mars e. Deimos
Fiber optics depends upon the phenomenon of
A) total internal reflection. B) diffuse reflection. C) polarization. D) dispersion. E) absorption.
Phase Angles: An series circuit consists of an ac voltage source, a resistor of resistance 810 ?, and an inductor. (There is no capacitance in the circuit.) The current amplitude is 0.40 A, and the phase angle between the source voltage and the current has magnitude 11°. (a) Does the source voltage lag or lead the current?(b) What is the voltage amplitude of the source?
What will be an ideal response?