Answer:
Explanation:
Given
Average Electric Field Strength
Considering charge distribution to be uniform and earth to be symmetrical
Using Gauss law
Also
here Electric Field is acting inward therefore
Answer:
B. -38.2 m/s
Explanation:
Given parameters:
Time of fall = 4s
Unknown:
Final velocity of the rock = ?
Solution:
To solve this problem, we use the expression below;
V = U + gt
V is the final velocity
U is the initial velocity
g is the acceleration due to gravity = 9.8m/s²
t is the time taken
Now, insert the parameters and solve;
V = 0 + (9.8 x 4) = 39.2m/s
Answer:
The voltage that must be supplied is
V=1750volts
Explanation:
Step one :
The formula for the electric field between the charges is given by
E=V/d
Where E= the electric field
V= voltage or potential difference
d= the distance between the two electrodes
Step two :
Given that
E=3.5*0^6v/m
d=0.05cm to meter we have 0.0005m
V= unknown
By making v subject of formula we can solve for the required voltage
V=d*E
V=0.0005*3.5*10^6
V=1750volts