Answer:
C evaluating the solution
7,000 decimeters
it's the only volume quantity in the list ??? the rest are lengths ???
Answer: the momentum is increased
Energy and momentum are conserved, this was proved by he American physicist Arthur H. Compton after his experiments related to the scattering of photons from electrons (Compton Effect), in which he also proved that photons do have momentum.
So, this momentum is given by the following expression:
Where is the Planck constant and is the wavelength of the photon.
As we can see, the momentum is inversely proportional to to the wavelength. This means, if <u>decreases</u>, <u>increases</u>.
The
half-life of this radioactive isotope is 9 months for it decreases to
one-fourth its original amount in 18 months. Half-life means a certain length
of time after which half of the amount of radioactive element has decayed.
Therefore,
the half-life of this particular isotope is 18 months. After 18 months the
isotope was at one-half, then another 18 months, the isotope was at one-fourth,
which is 9 months where one-fourth is one-half of one half.