Answer:
B) the decay rates of radioactive uranium and lead
Explanation:
The radioactive decay is modeled using an exponential function with an essential parameter, namely the decay rate. The two rates (for urianium and lead) allow her to determine the number of years that passed since the time the zirconium was formed.
Answer:
Explanation:
The formula for KE is
and we fill in to solve for KE:
I used 2 significant digits in the velocity because 1 isn't accurate enough. Therefore, my answer will be rounded to 2 sig fig's:
KE = 340 J (rounded from 343). And we do the exact same thing in #2:
(Used 2sig fig's for both the mass and the velocity) to get
KE = 63 J (rounded from 62.5)
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Answer:
The distance from the positive plate at which the two pass each other is 0.0023 cm.
Explanation:
We need to find the acceleration of each particle first. Let's use the electric force equation.


<u>For the proton</u>




<u>For the electron</u>



Now we know that the plate separation is 4.26 cm or 0.0426 m. The travel distance of the proton plus the travel distance of the electron is 0.0426 m.

Both of them have an initial speed equal to zero. So we have:



With this time we can find the distance from the positive plate (x(p)).


Therefore, the distance from the positive plate at which the two pass each other is 0.0023 cm.
I hope it helps you!
Answer:
The English system of measures is a collection of measures for length, volume, weight, area, etc.
Explanation: