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3 years ago

Which radioisotope is used in dating geological formations?

Physics

1 answer:

ziro4ka [17]3 years ago

6 0

<h2>Answer: U-238</h2>

Explanation:

Let's begin by explaining that for radioactive geological dating (also called radioisotope dating) in which radioactive impurities were selectively incorporated when the fossil materials were formed, it is very useful to compare it with a naturally occurring radioisotope having a known half-life.

Now, taking into account that the fossils are millions and millions of years old, radioisotopes are needed that exceed this measure.

To understand it better:

The longer the half-life of a radioisotope, the greater its utility for estimating fossil ages or geological formations.

In this sense, uranium-238 (U238) has a half-life of 4,470 million years, therefore, it is among the most commonly used radioisotopes for fossil and geological dating.

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Where are the magnetic field and force weakest in a magnet?

nadya68 [22]

The magnetic field and force is weakest in the center of the magnet. The correct answer is C.

5 0

3 years ago

Find the net force and acceleration. 15 points. Will give brainliest!

gladu [14]

Answer:

$\boxed{F_{net} = 28.7 \ N}$

$\boxed{a = 2.1 \ m/s^2}$

Explanation:

Finding the net force:

Firstly , we'll find force of Friction:

$F_{k} = (micro)_{k}mg$

Where $(micro)_{k}$ is the coefficient of friction and m = 13.6 kg

$F_{k} = (0.16)(13.6)(9.8)\\$

$F_{k} = 21.32 \ N$

Now, Finding the net force:

$F_{net} = F - F_{k}\\F_{net} = 50 - 21.32\\$

$F_{net} = 28.7 \ N$

Finding Acceleration:

$a = \frac{F_{net}}{m}$

$a = \frac{28.7}{13.6}$

$a = 2.1 \ m/s^2$

8 0

3 years ago

1. An object in free fall will have an initial velocity equal to zero when: a. It is thrown vertically down

Ne4ueva [31]

Answer:

b. It is dropped

Explanation:

If the initial velocity is zero, the object move from rest. That happens if the object is dropped

6 0

3 years ago

Which of the following is not a use for a weather radar?

Elodia [21]

Weather radar is used to locate precipitation, calculate its motion, and estimate its type rain, snow, hail etc

so, d.measuring temperature is not a use for a weather radar

effect of global warming-heavier rainfall and flooding

5 0

3 years ago

Read 2 more answers

The energy that generates wind comes from what source?

Rudiy27

Answer:

we can say that wind energy is due to

D) Severe thunderstorms

Explanation:

As we know that wind energy is converted into kinetic energy of wind mills

This kinetic energy of wind mill is then converted into electrical energy using turbine

now we can consider here energy conservation theory that energy is only converted from one form to other form

it neither be destroyed nor be created but it can transfer from one form to other form

So here we can say that wind energy is due to

D) Severe thunderstorms

3 0

3 years ago