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

Physics & Space Science

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The Milky Way has no sharply defined outer edge.

Answer the following statement true (T) or false (F)

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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.

Physics & Space Science

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

Physics & Space Science

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.

Physics & Space Science