Physics: How can you find the age of a layer of rock that is surrounded by layers of volcanic ash

Approximately .Explanation:Convert the initial speed of this truck to standard units:.Calculate the initial kinetic energy of this truck:.The kinetic energy of the truck would be when the truck is not moving. Hence, the friction on the truck would need to do of work on the truck to bring the truck to a stop.Calculate the displacement required to achieve of work at :.This result is negative because the direction of friction is opposite to the direction of the motion of the truck.Hence, the truck...

How can you find the age of a layer of rock that

Ответ:

jordan2875

19.01.2022

Physics

Radiometric dating method

Explanation:

The radiometric dating method is usually defined as a technique that is commonly used by the geologists in order to determine the age of the rocks based on the presence of radioactive elements or substances. These radioactive elements are comprised of unstable radioactive isotopes that release harmful radiations as it alters from an unstable condition to a stable one. They undergo decay at a definite rate which is known as the decay rate. For different rocks, this rate of decay is different.

The age of the rock layers can be determined by dating the rocks forming the layers. This will give a somewhat approximate age of the rocks.

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Ответ:

nas5119

29.11.2021

Physics

Approximately $63\; \rm m$ .

Explanation:

Convert the initial speed of this truck to standard units:

$\begin{aligned} v &= 72\; \rm km \cdot h^{-1} \times \frac{1\; \rm h}{3600\; \rm s} \times \frac{1000\; \rm m}{1\; \rm km} \\ &= 20\; \rm m \cdot s^{-1}\end{aligned}$ .

Calculate the initial kinetic energy of this truck:

$\begin{aligned}\text{KE} &= \frac{1}{2} \, m \cdot v^{2} \\ &= \frac{1}{2} \times 2600\; \rm kg \times (20\; \rm m \cdot s^{-1})^{2} \\ &= 5.2 \times 10^{5} \; \rm J\end{aligned}$ .

The kinetic energy of the truck would be when the truck is not moving. Hence, the friction on the truck would need to do $(-5.2 \times 10^{5}\; \rm J)$ of work on the truck to bring the truck to a stop.

Calculate the displacement required to achieve $(-5.2 \times 10^{5}\; \rm J)$ of work at $8200\; \rm N$ :

$\begin{aligned}x &= \frac{W}{F} \\ &= \frac{-5.2 \times 10^{5}\; \rm J}{8200\; \rm N} \approx -63\; \rm m\end{aligned}$ .

This result is negative because the direction of friction is opposite to the direction of the motion of the truck.

Hence, the truck would come to a stop after skidding for approximately $63\; \rm m$ .

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How can you find the age of a layer of rock that is surrounded by layers of volcanic ash

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