Which type of radiation produces a wave and a lot of energy?A. GammaB. AlphaC. BetaD. Zeta
1 answer:
The correct answer is option A.
The Gamma waves emitted from radioactive decay have a frequency of around 10¹⁹ Hz, which is much greater compared to the alpha of beta waves.
The frequency is directly proportional to the energy of the waves as given by the equation,
Where E is the energy, h is the Planck's constant, and f is the frequency.
Thus the gamma waves have a lot of energy compared to the other options.
Thus the correct answer is option A.
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1. 0.16 N
The weight of a man on the surface of asteroid is equal to the gravitational force exerted on the man:
where
G is the gravitational constant
is the mass of the asteroid
m = 100 kg is the mass of the man
r = 2.0 km = 2000 m is the distance of the man from the centre of the asteroid
Substituting, we find
2. 1.7 m/s
In order to stay in orbit just above the surface of the asteroid (so, at a distance r=2000 m from its centre), the gravitational force must be equal to the centripetal force
where v is the minimum speed required to stay in orbit.
Re-arranging the equation and solving for v, we find: