Given,
Kinetic energy of the car = 2000 J
speed of the car is doubled
we know,
now, speed of the car is doubled
v' = 2 v
Using
=1/22
Hence, the Kinetic energy would be equal to 8000 J.
Answer:
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Answer:

Explanation:
The capacitance of the parallel-plate capacitor is given by

where
ϵ0 = 8.85x10-12 C2/N.m2 is the vacuum permittivity
k = 3.00 is the dielectric constant
is the area of the plates
d = 9.00 mm = 0.009 m is the separation between the plates
Substituting,

Now we can calculate the energy of the capacitor, given by:

where
C is the capacitance
V = 15.0 V is the potential difference
Substituting,

They recorded the first references to electrical effects, such as static electricity and lightning, over 2,500 years ago. It was not until 1600 that a man named Dr. William Gilbert coined the term “electrica,” a Latin word which describes the static charge that develops when certain materials are rubbed against amber.
Laws that implemented the consumers' right to be informed forbid misleading advertising.
Answer is C.