The correct answer is Van de Graaff generator. A large electrostatic generator is commonly called a Van de Graaff generator. This large generator is a device for the production of high voltage by means of endless belt collecting of electrostatic charge.
Answer:
2.5 Hz
Explanation:
3.0m/s / 1.2 m=2.5 1/s=2/5 Hz
Answer:velocity=
Explanation:
We shall use conservation of energy to solve this problem
we have
Potential energy of King Kong at top of building = His kinetic energy at the bottom
Potential energy of an object = = 20000 kg
Where m is mass of an object(20000 kg)
g is accleration due to gravity = 9.81
h is the height above the surface of earth = 1450 feet = 441.96 meters
Applying values we get
......................(i)
Now Kinetic energy is given by
.......................(ii)
Equating i and ii we get
86712.552 =
Applying values we get
density = mass/volume
50 kg to g
50*1000 = 50,000 grams
200 mm to cm
200*0.1 = 20 cm
Substitute: 0.8=50,000/volume of a cylinder
volume of cylinder= (pi)(r^2)(h)
volume of cylinder=(pi)(20^2)(h)
0.8=50,000/((pi)(20^2)(h))
0.8=50,000/400*pi*h
50,000/0.8=400*pi*h
62,500=400*pi*h
62,500/(400*pi)=h
h≈49.74 cm