In the Absence of Air Resistance,the Least Speed with Which $\times$

question 4

Multiple Choice

In the absence of air resistance,the least speed with which a body must be projected vertically upward from Earth's surface (m_e = 5.99 $\times$ 10²⁴ kg, r_e = 6.37 $\times$ 10⁶ m) if it is to reach an altitude of 800 km is

• A)~1.39 \(\times\) 10⁷ m/s
• B)~3.73 \(\times\) 10³ m/s
• C)~1.57 \(\times\) 10⁷ m/s
• D)~3.96 \(\times\) 10³ m/s
• E)None of these is correct.

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Definitions:

Aldrin

A potent insecticide that has been banned in many countries due to its toxic effects on wildlife and potential harm to human health.

Dieldrin

A highly toxic chlorinated hydrocarbon pesticide, banned in many countries due to its environmental persistence and potential to harm wildlife and humans.

Pesticides

Substances used to prevent, destroy, or control pests including weeds, insects, and disease-causing organisms in agricultural production and disease vector control.

Fungi

A kingdom of complex organisms distinct from plants and animals, including yeasts, molds, and mushrooms, often playing essential roles in decomposition and nutrient cycling.