Explanation:
Below is an attachment containing the solution to the question.
Answer:
Ecu/Eag = 0.46
Explanation:
E = PI/A
Ecu = Pcu × I/A
Pcu = 1.72×10^-8 ohm-meter
r = 0.8 mm = 0.8/1000 = 8×10^-4 m
A = πr^2 = π×(8×10^-4)^2 = 6.4×10^-7π
Ecu = 1.72×10^-8I/6.4×10^-7π = 0.026875I/1
Eag = Pag × I/A
Pag = 1.47×10^-8 ohm-meter
r = 0.5 mm = 0.5/1000 = 5×10^-4 m
A = πr^2 = π × (5×10^-4)^2 = 2.5×10^-7π
Eag = 1.47×10^-8I/2.5×10^-7π = 0.0588I/π
Ecu/Eag = 0.026875I/π × π/0.0588I = 0.46
All bases have a pH above 7, so the solution that turned green (the soapy water) is basic.
Answer:
Newton's first law of motion state's that an object at rest can not be able to move provided that there is no external forces applied
Explanation:
- Meaning an object at rest will not move an less someone else applies a force to it
- Example if you leave a pot on the stove you expect to find it on the stove an less someone else moves it
Answer:
The tension in the string at the top = 
The tension in the string at the top = 
Explanation:
a) at the top
----------------------(1)
Where,
is the centripetal force
is the gravitational force
force due to tension
From (1)
where
R is the radius
m is the mass
T is the time taken for one revolution
g is the acceleration due to gravity
On Substituting the values
= 70.7259N
=71N
b) at the bottom
On Substituting the values
