A student woke up in the morning and checked the rain gauge in her backyard. The rain gauge was empty, but the grass was moist.
Which of the following best explains how this could happen?
A. It snowed, but did not rain during the night.
B. Run-off from a nearby river made the grass wet.
C. Water Vapor Condensed on the grass.
D. The water in the rain gauge evaporated, but the water on the grass did not.
Explain why you choose the answer you did.
THANK YOU!
A. It snowed, but did not rain during the night.
B. Run-off from a nearby river made the grass wet.
C. Water Vapor Condensed on the grass.
D. The water in the rain gauge evaporated, but the water on the grass did not.
Explain why you choose the answer you did.
THANK YOU!
2 answers:
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Answer:
a) In a parallel plate capacitor the capacitance is
So, in order to halve the capacitance the plate separation should be twice the original distance.
b) Same question as (a).
c) According to the above equations, the charge stored in a capacitor is directly proportional to the plate separation.
In order to halve the charge stored the plate separation should be half the original distance.
d) Same question as (c).
e) The energy stored in a capacitor is
In order to halve the energy stored in the capacitor, the plate separation should be twice the original distance.
f) Same question as (e).
g) The energy density is given by the following equation
As it turns out, the energy density is independent from the geometric factors. This makes sense, because the electric field in a parallel field capacitor is independent from the distance.
Answer and Explanation: Kinetic energy is related to movement: it is the energy an object possesses during the movement. it is calculated as:
For the object thrown in the air:
Kinetic energy of the object as a function of time:
Potential energy is the energy an object possesses due to its position in relation to other objects. It is calculated as:
For the object thrown in the air:
Potential energy as function of time:
Total kinetic and potential energy, also known as mechanical energy is
TME = + (
)
TME = 1752
The expression shows that total energy of an object thrown in the air is constant and independent of time.