The electron gun in a television tube accelerates electrons (mass = 9.11 × 10?31 kg, charge = 1.60 × 10?19 C) from rest to 3.00 × 107 m/s within a distance of 2.00 cm. What electric field is required?
What will be an ideal response?
128 000 N/C
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According to Kepler's 3rd law, we expect:
A. A more distant planet, e.g. Jupiter, to spin about its axis faster than the Earth B. A more distant planet to spin about its axis slower than the Earth C. An interior planet, e.g. Venus, to spin about its axis faster than the Earth D. none of the above
A capacitor having, C1, is connected to a battery until charged, then disconnected from the battery. A second capacitor, C2, is connected in parallel to the first capacitor. Which statements below are true?
If an electron in the lab has a kinetic energy equal to twice its rest energy, what is its speed in the lab?
A) 0.87c B) 0.89c C) 0.94c D) 0.91c E) 0.84c
If a star's pressure increases in its interior to push the star outward, its temperature will drop, causing the star to contract and eventually return to equilibrium
a. True b. False Indicate whether the statement is true or false