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 × 10^7 m/s within a distance of 2.00 cm. What electric field is required?
128 000 N/C
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The Milky Way has no sharply defined outer edge.
Answer the following statement true (T) or false (F)
Stars that have masses similar to the Sun's, and sizes similar to the Earth are:
A) main sequence stars. B) white dwarfs. C) red giants. D) red dwarfs. E) brown dwarfs.
Which statement about images is correct?
A) A virtual image cannot be formed on a screen. B) A virtual image cannot be viewed by the unaided eye. C) A virtual image cannot be photographed. D) A real image must be erect. E) Mirrors always produce real images because they reflect light.
A point charge q = +1 ?C is located at the origin. What is the flux of the electric field of this charge through a square whose corners are (x, y, z) = (1, 1, 1), (-1, 1, 1), (-1, 1, -1), and (1, 1, -1)?
A) 11.3 × 104 Nm2/C B) 0.5 × 104 Nm2/C C) 0 D) 1.0 × 104 Nm2/C E) 1.9 × 104 Nm2/C