- rocket science
- automotive research
- space research
Answer:
time of flight of a pulse, and these most often
involve triggering of the measuring oscilloscope
with the signal that generates the sound pulse and
timing the time delay of the pulse picked up by a
conveniently placed microphone45
. Loren Winters
has reported a method similar in principle to the
present one, but which uses a completely different
detection system6
.
Explanation:
Pesticides are nothing but strong chemicals that kill the pests.
They are harmful for human also.
While spraying, the pesticide mixes with the air and enters the farmer’s body who is spraying.
Inside the body this chemical gets mixed with the blood and affects the immune system.
As a result the farmer falls ill.
So it is important that the person who is spraying pesticide mush cover his mouth and nose to protect himself from its harmful effect.
Answer moderate alcohol can be good for you health
Explanation: but I wouldn't do none of those things to be honest
SMARTEST
Answer: A. at the point which
is twice the focal lenght of the lens of the camera
Explanation:
When a certain document is to be produced through the use of a duplicating camera, it should be noted that the camera should be placed at the point which is twice the focal lenght of the lens of the camera so as to get the exact copy of the document.
It should be noted that placing the camera between the principal and a point twice the focal lens of the camera lens or beyond a point that's twice the focal length will not produce the document.
Therefore, the correct option is A
