on touching electroscope gets positively charged, so answer is B. conduction
Answer:
Give four examples of landforms where both the water and the land around it are flat.
Explanation:
Answer: The answer is D: 300,000km/s
Explanation:
<h2>
Answer:50
</h2>
Explanation:
Let
be the airspeed.
Let
be the cross wind speed.
We know that,ground speed is the vector sum of airspeed and cross wind speed and airspeed is perpendicular to cross wind speed.
If
and
are two perpendicular vectors,the resultant vector has the magnitude 
Given,

So,the ground speed is 