Answer:
Capacitance = ( 4π×∈×r×R ) / (R-r)
energy store = ( 4π×∈×r×R )×V² / (R-r)
Explanation:
given data
radius = r
radius = R
r < R
to find out
capacitance and how much energy store
solution
we consider here r is inner radius and R is outer radius
so now apply capacitance C formula that is
C = Q/V .................1
here Q is charge and V is voltage
we know capacitance have equal and opposite charge so
V =
here E = Q / 4π∈k²
so
V = Q / 4π∈
V = Q / 4π∈ × ( 1/r - 1/R )
V = Q(R-r) / ( 4π×∈×r×R )
so from equation 1
C = Q/V
Capacitance = ( 4π×∈×r×R ) / (R-r)
and
energy store is 1/2×C×V²
energy store = ( 4π×∈×r×R )×V² / (R-r)
Answer:
Part a)
Part b)
Explanation:
Part a)
as the mass of the suspension system is given as
also we have
so now for force balance we have
Part b)
Now we know that amplitude decreases by 63% in each cycle
so after one cycle the amplitude will become 37% of initial amplitude
so it is given as
also we know
here t = time period of one oscillation
so it is
now damping constant is
Answer:
The correct answer to the following question will be "41.87 m".
Explanation:
The given values are:
The speed of trooper =
The velocity of red car =
Now,
A red car goes as far as possible until the speed or velocity of the troops is the same as that of of the red car at
(∵ )
then,
The distance covered by trooper,
The distance covered by red car,
=
=
Maximum distance =
=
What is the primary source of a sound?
C. A vibration
Which of the following best describes reverberation?
A. The wavefronts become mixed and broken up due to contact with a rough or irregular surface.
_______ occurs when a body’s molecular wavelength sends vibrations to another body, resulting in the production of another sound wave.
D. Resonance
Which of the following is an example of the Doppler effect?
B. Vibrations from a tuning fork pass through the air and cause a nearby dish of water to produce ripples of the same frequency.
In Sir Isaac Newton's time in the early 1700s, what was the general consensus among scientists on the properties of light?
D. Light is composed of particles and travels in a straight line.
If the angle of incidence of a light source to a shiny surface is 30 degrees, what will the angle of reflection be?
C. 30 degrees
If a material has a high index of refraction, it has a
B. high optical density, and light travels more slowly through it.
Which of the following statements regarding the visible spectrum of light is accurate?
D. It has the longest wavelength of all types of waves along the electromagnetic spectrum.
If you were to combine a beam of blue light and a beam of yellow light, what would the result be?
C. Green light
The type of light waves that living things give off naturally is called
D. visible light.
When you're standing in a pool in the summertime, and your leg looks shorter under the water than in air, this is an example of light
B. refraction.