Physics: Sending short pulses of electromagnetic waves into the ground and then receiving reflections of these waves to detect underground changes in soil or archaeological features is known

Sending short pulses of electromagnetic waves into

Ответ:

blondielocks2002

10.01.2022

Ground Penetrating Radar (GPR)

Explanation:

Ground Penetrating Radar is a non-destructive testing method that uses electromagnetic radiations of the microwave band range of very high frequency and detects them after the reflection from the subsurface.

It is a geophysical method of subsurface imaging.

It is used to study the underground water, bedrocks, archaeological artifacts and features, detection of unexploded ordnance and detecting tunnels.

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Ответ:

leilaneedshelp3395

10.11.2020

Physics

a) $20\ \rm m/s^2$

b) 80 m

Explanation:

Given:

Initial velocity of the object, u=20 m/sFinal velocity of the object, v=60 m/sTime taken, t=2 s

Using Equation of motion we have

a)Let a be the acceleration of the object

$v=u+at\\60=20+2a\\a=20\ \rm m/s^2$

b) Let d be the distance covered by the object given by

Using equation of motion we have

$2ad=v^2-u^2\\2\times20\times d=60^2-20^2\\d=80\ \rm m$

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Sending short pulses of electromagnetic waves into the ground and then receiving reflections of these waves to detect underground changes in soil or archaeological features is known

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