Thank you for posting your question here. I hope my answer will help. below are the choices that can be found elsewhere:
a. 300 mi/hr2
<span>b. 61 mi/hr2 </span>
<span>c. 8,201 mi/hr2 </span>
<span>d. 40,500 mi/hr
</span>
Below is the solution:
<span>135 * 135 / 0.450 = 40,500 mi/hr2 </span>
It takes 16.02 days for the activity of Y90
<h3>Further explanation
</h3>
The atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.
Usually radioactive elements have an unstable atomic nucleus.
The main particles are emitted by radioactive elements so that they generally decay are alpha (α), beta (β) and gamma (γ) particles
General formulas used in decay:

T = duration of decay
t 1/2 = half-life
N₀ = the number of initial radioactive atoms
Nt = the number of radioactive atoms left after decaying during T time
No=192 μCi
Nt=3 μCi
t1/2=2.67 days

Answer:
A reactant is there at the start of a chemical reaction, whereas a product is there at the end of a chemical reaction.
I hope this helps!
3 MgCl₂ + 1 Na₃P = 1 Mg₃P₂ + 6 NaCl<span>
Mg</span>₃Cl₂ = <span>Magnesium Phosphide
</span>
NaCl = Sodium <span>chloride
hope this helps!</span>
Answer:
<h3>F=4k.gm/s^2</h3>
Explanation:
<h3>F=m×a</h3><h3>f=2k.g×2m/s^2</h3><h3>f=4k.gm/s^2</h3>