A Radar Pulse Sent Out to an Airplane at a Distance

question 22

Multiple Choice

A radar pulse sent out to an airplane at a distance of 20.0 km will return as an echo to the source in what time interval? (c = 3.00 x 10⁸ m/s)

• A)33.3 x 10^-6 s
• B)66.7 x 10^-6 s
• C)133 x 10^-6 s
• D)0.033 3 x 10^-6 s

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Definitions:

Polar Transport

The directional movement of substances, such as plant hormones, from one part of a plant to another.

Gravitropism

Growth of a plant in response to gravity

Apical Dominance

The phenomenon where the main, central stem of the plant grows more vigorously than the other side stems due to the concentration of growth hormones at the tip.

Ethylene

A hydrocarbon gas (C2H4) that acts as a plant hormone, influencing growth, development, and responses to environmental stress.