Answer:
Ball A
Explanation:
Let the initial speed of the balls be u .
Angle of projection for ball A = 20°
Angle of projection for ball B = 75°
As we know that at highest point, the ball has only horizontal speed which always remains constant throughout the motion because the acceleration in horizontal direction is zero.
Speed of ball A at highest point = u Cos 20° = 0.94 u
Speed of ball B at highest point = u Cos 75° = 0.26 u
So, the ball A has bigger speed than B.
Answer:
Part a)
E = 0
Part b)

Part c)
Electric field inside the conductor is again zero

Part d)

Explanation:
Part a)
conducting sphere is of radius
R = 2 cm
so electric field inside any conductor is always zero
So electric field at r = 1 cm
E = 0
Part b)
Now at r = 3 cm
By Gauss law



Part c)
Again when we use r = 4.50 cm
then we will have
Electric field inside the conductor is again zero

Part d)
Now at r = 7 cm
again by Gauss law



Explanation : Tina is doing work all of the time because whiles she’s pulling and allowing the rope to be pulled her body using muscles to keep herself upright and a firm grip on the rope.
Disease
Lack of natural reourses
war
asteroid
Polution.