<span>speed = wavelength x frequency
speed = 0.4m X 10 Hz
speed = 4 m/s</span>
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!
Answer:
1.17
Explanation:
Given that,
The refractive index of ice wrt air = 1.31
The refractive index of rock salt wrt air = 1.54
We need to find the refractive index of rock salt with respect to ice.
We know that,
refractive index = (speed of light in air or vaccum)/( speed of light in that medium)
So,
The speed of light in ice = c/(1.31)
The speed of light in rock salt = c/(1.54)
So, the refractive index of rock salt with respect to ice is :
So, the required refractive index of rock salt wrt ice is 1.17.
Answer:
rotation of earth from West to East
The answer to the given question above would be ZERO. For general projectile motion, the one that best describes the horizontal component of a projectile's velocity is this: <span>The horizontal component of a projectile's acceleration is zero. Hope this answers your question.</span>
