Answer:
option D
Explanation:
The correct answer is option D
Potential energy of an object is because of its location.
Expression of potential energy
P E = m g H
where H is the height of the object.
g is acceleration due to gravity, 9.8 m/s²
m is the mass of the object.
Potential energy is directly proportional to the location of the object.
If the height of the object is more than the potential energy of the object will also increase.
Answer:
principle of contiguity
Explanation:
The Law of Contiguity states that after events occur together (in spatio-temporal proximity), the re-occurrence of just one of the event awakens the 'memory' of the others. It is employed in a great number of scientific theories of learning, memory, and knowledge.
Your heart beats approximately once per second. There are 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, 365.25 days in a year, and approximately 75 years in a lifetime.
Answer: the electric field is equal to: E=0 for r<2 cm; E= -2.29*10^4/r^2 for 2cm<r<4cm; E=0 for 4cm<r<5 cm; E=5.26*10^4/r^2 for r>5 cm
the electric field in N/C units
Explanation: In order to find the electric field for all r values, we have to use the definition of electric field and Gaussian law.
In this sense, for r<2 cm as it is inside a conductor teh electric field is zero.
for 2cm< r< 4 cm we applied the field from a spherical charge distribution so by the Gaussian law we find the total charge inside the gaussian surface so
E.4π r^2= Q inside/ε0 = -2.55μC/ε0
Idem for other regions.
for 4 cm<r< 5 cm in the outsider conductor the E=0
Finally, for r>5 cm
E.4π r^2=Q inside/ε0=(8.40-2.55)μC/ε0
From the Pythagorean theorem, we have
Simplifying both sides gives
But we're talking about lengths, which can't be negative, so <em>x</em> = 2.