Since in an electromagnetic wave the electric and magnetic fields are perpendicular to each other and perpendicular to the direction of motion, the electric field has to point in the z direction.
Lets do
We know
The rate of change of velocity is acceleration .
Integrate both sides
As acceleration is constant .Take it outside of integral .On velocity we can take limit u to v and time from 0 to t
Hence
Answer:
The answer an be the option A.
Explanation:
Because radioactive substances have atomic number greater than 82.
Answer:
4.69 s
Explanation:
u = Initial velocity = 30 m/s
= Angle of launch =
g = Acceleration due to gravity =
Time taken by the projectile to land is given by
The time the projectile is in the air before it contacts the ground again is 4.69 s.