Answer:
76 V/m
Explanation:
= Electric potential at initial location = 119 V
= Electric potential at final location = 43 V
= distance between initial and final location = 1 m
= magnitude of electric field
Magnitude of electric field is given as


= 76 V/m
A) The vertical component of velocity v is taking the rock to a height
Vertical component =

The time taken to reach maximum height =

So total time of rocks flight =

Range of rock is due to the horizontal component of velocity =

Range =

=

Maximum height =

=

Since range = maximum height
We have



So when angle of projection is

range is equal to maximum height reached.
b) We have range =

=

Maximum of range is reached when

Maximum range =

c) For range to be equal to maximum height only condition is

, it does not depend upon acceleration due to gravity and velocity. That angle is a constant.
Answer:
The population of the mice will decrease to the faster, stronger, and smarter mice because the weaker will die because of natural selection.
Explanation:
Force applied by the machine to over come resistance