Explanation:
Let us assume that the initial velocity is u. And, according to the kinematics,
s =
ut = s -
Putting the given values into the above formula as follows.
ut = s -
u = 9.93 m/s
Hence, the required height will be calculated as follows.
h =
=
= 5.03 m
Thus, we can conclude that security look for the raucous hotel guests at 5.03 m.
The answer is: 720W
The definition of Power is:P =L/t =→F⋅→s/t =→F⋅→s/t = →F⋅→v
The ⋅ in the last formulation designate a scalar product, well-defined by:
→v . →w = |v| |w| cos(ˆvw), the angle ˆvw is 0 because →F and →v are parallel, so the cosinus is 1.
So: P=1800N⋅ 0,40m/s=720W.
Answer:
For outer points of shell
Now for inner point of shell
Explanation:
As we know that out side the shell electric potential is given as
inside the shell the electric potential is given as
now we know the relation between electric potential and electric field as
so we can say for outer points of the shell
Now for inner point again we can use the same