Answer:
True all waves that go up must come down
I feel like the follow the rule of gravity:everything that goes up must come d5
In a parallel circuit the voltage is the same across all branches.
Answer:
a) 1.6*10^21 Joules.
b) 40,000
Explanation:
part a )
maximum destructive energy that can be released is the case when all the kinetic energy of the asteroid is consumed.
therefore E = 1/2 m v^2
m= density * volume
= 3100* (4/3* pi * 1000^3 ) = 12978666666666.67 kg
given v = 16000m/s
therefore
E= 1/2 * 12978666666666.67 * 16000 * 16000
= 1.6 x 10^21 Joules!
part B)
each bomb is capable of 4 x 10^16 joules
therefore no of bombs that are needed to produce the required energy are
1.6 x 10^21 / 4 x 10^16 = 40,000
that is 40,000 such nuclear bombs are required!
Using the rotational equivalent of force:
Which is T = I*Alpha
Where: T is torque, I is the moment of inertia and Alpha is
the angular acceleration.
This is for the flywheel: J = 1/2mr^2 = 5*3^2 = 45
kgm^2
From the equation:
T = J*dω/dt
we get:
Δt = J*Δω/T = 45*8.13/110.0 = 3.326 sec
Imagine a right angle triangle with the diagonal side being 100m long. Since the angle between the ground and cable is 10 degrees, sin 10 = pole/cable.
Pole length = <span>17.36m
Answer is A, 17.4m.</span>
