Explanation:
A plane mirror always creates an image with the same distance to the mirror as the object, only in the other direction. So both of them have a distance of 10cm, one is 10cm to the left, one 10cm to the right, thus their mutual distance is 20cm
(a) 9040 V/m
The magnitude of the electric field between two parallel, oppositely charged plates is given by
where
is the charge surface density on each plate
is the vacuum permittivity
In this problem, the magnitude of the charge density on each plate is
Substituting into the formula, we find the magnitude of the electric field:
(b) 90.4 V
The electric potential difference between the two plates is given by
where
E is the magnitude of the electric field
d is the separation between the two plates
In this problem, we have
E = 9040 V/m
d = 1.00 cm = 0.01 m
Substituting into the formula, we find
Answer:
Explanation:
During the first .8 s , the elevator is under acceleration . It starts from initial velocity u = 0 , final velocity v = 1.2 m /s , time = .8 s
v = u + at
1.2 = 0 + .8 a
a = 1.2 / .8
= 1.5 m /s²
During the acceleration in upward direction , let reaction force of ground on man be R .
Net force on man = R - mg
Applying Newton's 2 nd law
R - mg = ma
R = m ( g + a )
= 72 ( 9.8 + 1.5 )
= 813.6 N .
This reaction force will be measured by spring scale , so reading of spring scale will be 813.6 N .
Answer:
Montesquieu called the idea of dividing government power into three branches the "separation of powers." He thought it most important to create separate branches of government with equal but different powers. That way, the government would avoid placing too much power with one individual or group of individuals.
Explanation:
