Radar works by sending out electromagnetic energy at a particular wavelength and receiving a reflected signal from distant objects, similar to a sound echo. Many modern military aircraft have what is known as “stealth technology” that allows the aircraft to be invisible to enemy radar. What statement best explains how this is possible?

This question is incomplete

Explanation:

This question is incomplete because of the absence of options. However, stealth technology works (in two major ways) by using coating materials other than the normal coating materials or by changing the shape of the aircraft.

Normally, the coating material of the aircraft are always produced in a way that they can be able to reflect antenna signals back to radar antenna. However, with stealth technology, other coating materials have been developed that absorbs the radar energy instead of reflecting it. Also, conventional aircrafts have a rounded shape which makes the body easily reflect some radar signals back to the radar antenna but stealth aircrafts have a flat surfaces and pointed edges instead; this enables the aircraft to reflect radar signals away from the radar antenna.

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

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