Answer:
<h3>i think so 4 one ................. . </h3>
Mmm, you can work this one out in your head by reversing it.
<span>12.5 = 50g/4 </span>
<span>1/4 = 1/2 * 1/2 </span>
<span>thus in 14.4 seconds there have been 2 times the half life. 14.4/2 = 7.2 </span>
<span>the half life is 7.2 seconds.</span>
Answer:
velocity
Explanation:
The definition of acceleration is: Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.
Answer:
Explanation:
Number of molecules = Moles x Avogadro number
= 65 x 6.022 x 10^23
= 3.9 x 10^25
Answer:
See attached image.
Explanation:
The explanations are on the attachment. The numerical results are below.
1. 63g/7cm^3 = 9 g/cm^3
2. The m or mm must be converted so that the units are the same. 1 m = 1000 mm. I'll convert the meters to mm: 0.080 m = 80 mm.
480 mm^2/80 mm = 6 mm
3. L times L makes no physical sense, unless this is a new Star Wars technique for making dark matter. Entertaining, but useless.