Venus' lack of magnetic field means that:

A) there is no lightning on Venus.
B) the surface of Venus has no protection from the Sun's radiation.
C) it doesn't have a liquid metallic core.
D) Venus' upper atmosphere is permanently ionized.
E) there are constant aurorae everywhere on Venus.


D

Physics & Space Science

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Air is pumped into a bicycle tire at constant temperature. The pressure increases because:

A. more molecules strike the tire wall per second B. the molecules are larger C. the molecules are farther apart D. each molecule is moving faster E. each molecule has more kinetic energy

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Vision Problems: What is the power of the lens that has a focal length of 40 cm and a diameter if 5.0 cm?

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The solar constant refers to that fact that the Sun's luminosity has remained unchanged in the age of the solar system

Indicate whether the statement is true or false

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