How do scientists decide which isotope to use, when dating a rock?

Answer:

I think the the answer is creating and layout and template style     ( C )

Explanation:

I did it before and i was checking my notes and i wrote that down , Hope this Helps :)

A) water medium is usually used for determining the refractive index.

In physics, refraction is the direction change brought on by a wave's speed change as it travels through a medium. For instance, waves move more quickly in deep water than they do in shallow.

The most often investigated characteristic in the forensic analysis of glass pieces is refractive index since it is easily evaluated on the minuscule shards typically found in casework.

Glass is the ideal real-world illustration of light refraction. A glass jar will make an object appear smaller and a little elevated when viewed through it. The text on a piece of paper or a document will appear closer to the surface if a slab of glass is placed over it due to the different angle the light is bending at.

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The complete question is:

Forensic scientists immerse glass evidence into a medium to determine its refractive index. Which medium is usually used for determining the

refractive index?

A. water

B. Air

C. Gel

D. Oil

Answer: c living in a camber in an under water habitat

Explanation:

Light travels faster in thin air compared to dense air. This is because the density of the medium affects the speed of light. When light enters a denser medium, such as air, its speed slows down. The opposite occurs when light travels through a less dense medium, like thin air, where its speed increases.

This difference in the speed of light in different mediums has a small effect on the period of daylight. As light travels faster in thin air, it takes less time for the sun's rays to reach our eyes. This means that the period of daylight would be slightly longer in a location with thin air compared to a location with dense air. However, this effect is very small and is not significant enough to cause a noticeable difference in the length of daylight. Other factors, such as the tilt of the earth's axis and its orbit around the sun, have a much greater impact on the length of daylight.

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The relationships in Fick's law include the flow rate being proportional to the diffusion coefficient and the flow of particles only occurring when there is a density gradient.

Fick's law describes the rate of diffusion of particles in a system. It states that the flow rate of particles (J) is proportional to the diffusion coefficient (D) and the concentration gradient (dC/dx) of the particles in the system. Therefore, the statement "The flow rate is proportional to the diffusion coefficient" is accurate. The diffusion coefficient represents the ability of particles to move through a medium, and a higher diffusion coefficient leads to a higher flow rate.

On the other hand, the statement "The flow rate of particles is independent of the diffusion coefficient" is incorrect. The flow rate is directly influenced by the diffusion coefficient as mentioned earlier.

The statement "The flow rate is independent of temperature" is not a characteristic of Fick's law. Temperature can affect the diffusion coefficient, as higher temperatures generally increase the rate of diffusion.

The statement "The flow of particles only occurs when there is a density gradient" is correct. Diffusion occurs due to the concentration gradient of particles, where particles move from regions of higher concentration to lower concentration. Thus, the presence of a density gradient is essential for the flow of particles according to Fick's law.

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Centripetal refers to “center-seeking” Quantifies the change in directionof the velocity The acceleration is directed toward the center of the circle of motion.

The magnitude of the centripetal acceleration is given by V^2/r, the direction is toward the center of the circle. The tangential component of the acceleration is due to changing speed. The centripetal component of the acceleration is due to changing direction.

When an object is rotating at a constant angular velocity, the whole object has a constant angular velocity. Therefore, every mint on the turntable has the same, constant angular velocity.

The acceleration which causes the tangential velocity to change direction is called Centripetal acceleration. Centripetal acceleration is always in toward the center of the circle.

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Answer:

The option that best describes the relationship between frequency and wavelength of electromagnetic waves is the third option

c. The frequency increases as the wavelength decreases

Explanation:

The frequency of an electromagnetic wave, 'f', is given by the following formula;

\(Frequency, \, f = \dfrac{Wave \ Speed,v }{Wavelength, \ \lambda}\)

From the above formula, the frequency of an electromagnetic wave is inversely proportional to the wavelength, and therefore, a higher frequency, ('f', to increase), requires a lower wavelength, (λ, decreases)

The correct option is that the frequency of an electromagnetic increases as the wavelength of the wave decrease.

Answer:

35 degrees

Explanation:

The incident angle, an 80-degree angle, and as the angle of incidence increases, the amount of refraction also increases. So, we can expect a significant change in the angle of refraction from blue to red light at an 80-degree angle of incidence.

Refraction refers to the bending of light when it passes from different mediums.The amount of refraction that occurs at an interface between two materials depends on the wavelength of light, the angle of incidence, and the properties of the materials. The relationship between these factors is described by Snell's law:

n1 sinθ1 = n2 sinθ2

where n1 and n2 are the refractive indices of the two materials, θ1 is the angle of incidence, and θ2 is the angle of refraction.

For a given angle of incidence, the amount of refraction that occurs is greater for shorter wavelengths (i.e., blue light) than for longer wavelengths (i.e., red light). This effect is known as dispersion, and it is why we see rainbows when sunlight is refracted through water droplets.

In the absence of any information about the properties of the materials involved, we can assume that the amount of refraction will increase as the wavelength decreases.

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The light travels through water and gets reflected off on the glass surface into the water. There had been a 180° phase change between the incident and the reflected wave. This is called Total internal reflection (TIR).

In total internal reflection, in physics, a ray of light in a medium such as water or glass is completely reflected back into the medium from the surrounding surfaces. This phenomenon occurs when the angle of incidence is greater than a certain critical angle called the critical angle.

TIR only occurs when both of the following two conditions are met

Thus, the phases which include the TIR are the incident and the reflected phase and the incident light hits the surface while the reflected light reflects back.

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The magnitude of the resultant vector is 13.9m.

The size of the resulting vector can be determined using the Pythagorean theorem. As you can see from these two examples, the result of adding three or more rectangular vectors is easy to determine using the Pythagorean theorem. The vectors should be added in a different order. Equation 2 Subtracts the vectors in opposite directions from each other to get the resulting vector.

Where vector B is in the opposite direction to vector A and R is the resulting vector. The resulting vector is defined as a single vector that produces the same effect as many vectors produced together. The size of a vector is the length of the vector. The absolute value of vector a is represented by |a|. For more information on vector sizes, see Vectors overview. The formulas for the sizes of 2D and 3D vectors in terms of coordinates are derived on this page.

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Answer:

0.734 L or 734 mL

Explanation:

We'll begin by calculating the number of mole of HCl in 20.0 mL of a 3.00 M solution of hydrochloric acid, HCl.

This is illustrated below:

Molarity of hcl = 3 M

Volume = 20 mL = 20/1000 = 0.02 L

Mole of HCl =..?

Molarity = mole /Volume

3 = mole /0.02

Cross multiply

Mole of HCl = 3 x 0.02

Mole of HCl = 0.06 mole.

Next, we shall determine the number of mole of Hydrogen gas, H2 produced from the reaction of 0.06 mole of HCl. This can obtain as follow:

Mg + 2HCl —> MgCl2 + H2

From the balanced equation above,

2 moles of HCl reacted to produce 1 mole H2.

Therefore, 0.06 mole of HCl will react to produce = (0.06 x 1)/2 = 0.03 mole

Therefore, 0.03 mole of H2 was produced.

Finally, we shall determine the volume of the balloon by calculating the volume of Hydrogen gas, H2 in the balloon.

The volume of H2 can be obtained by using the ideal gas equation as follow:

Pressure (P) = 1 atm

Temperature (T) = 25°C = 25°C + 273 = 298K

Number of mole (n) of H2 = 0.03 mole

Gas constant (R) = 0.0821 atm.L/Kmol

Volume (V) of H2 =?

PV = nRT

1 x V = 0.03 x 0.0821 x 298

V = 0.734 L = 734 mL.

Therefore, the volume of the balloon is 0.734 L or 734 mL

An inactive electrode can be made from a plastic rod, a rubber policeman, and a glass stir rod.

Inactive electrodes are used in electrochemical reactions to complete the electrical circuit with the active electrode. These electrodes do not participate in the reaction and are typically made of materials that do not react with the solution or produce any unwanted products. Platinum wire and carbon rod are examples of active electrodes that can participate in the reaction.

Plastic rods, rubber policemen, and glass stir rods are all non-conductive materials that can be used to make inactive electrodes. They do not conduct electricity and do not react with the solution, making them suitable for use as electrodes in electrochemical reactions. Plastic and rubber are particularly useful as they can be easily shaped into different forms to suit the requirements of the experiment.

In conclusion, a plastic rod, a rubber policeman, and a glass stir rod can be used to make inactive electrodes. These materials are non-conductive and do not react with the solution, making them suitable for use in electrochemical reactions. Platinum wire and carbon rods should be avoided as they are active electrodes that can participate in the reaction.

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Answer:

l think that the answer is 10.hope this helps . Can you mark me the brainest pliz.lt's LAURA RAYS AMIRA.

Answer:

Explanation:

700-40 = 760

760/10 = 76

It will take her 76 days to finish the book

Answer:

10

Explanation:

would

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

\(a = \frac{f}{m} \\ \)

where

f is the force

m is the mass

From the question we have

\(a = \frac{750}{349} \\ = 2.14899713...\)

We have the final answer as

Hope this helps you

The term that best fits the definition of "Occurs at divergent boundaries and creates new seafloor" is seafloor spreading.Seafloor spreading is a geological process that takes place at mid-ocean ridges. At these sites, new oceanic crust is generated through volcanic activity and then gradually moves away from the ridge axis.

Seafloor spreading is a key part of plate tectonics, which is the theory that the Earth's outer layer is composed of plates that move relative to one another. The movement of these plates is driven by convection currents in the Earth's mantle, and as they move, they interact with one another at their boundaries. At divergent boundaries, which are where two plates are moving away from each other, seafloor spreading occurs.

This process is responsible for the creation of new oceanic crust and the widening of ocean basins over time. In conclusion, Seafloor spreading is a geological process that occurs at divergent boundaries and creates new seafloor.

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Answer: It leads to a front. A front is.., I don't know how to explain it, so I'll add a picture. Fronts are made out of clouds and usually bring rain. So the answer is C: The formation of clouds and rain.

Explanation:

Answer:

The penguins are gliding foward without stopping because there is no external force changing their state.

Explanation:

Newtons first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.

The distance between the slits, d = 1.50 × 10⁻⁸ cm, and the distance from the center of the slits to the first node, x = 97.5 cm. The position of the first node is given as y = 4.50 cm. We are required to calculate the wavelength using these values.

Wavelength of the light can be calculated using the relation given below;y = (m + 1/2) λD/dwhere m is the order of the interference maximum observedD is the distance between the screen and the slitsd is the distance between the two slitsλ is the wavelength of the light

The We have to rearrange the formula given above to obtain the value of λ. We can write this as;λ = (m + 1/2) (d/y) (D)Substitute the values in the equation above,λ = (0 + 1/2) (1.5 × 10⁻⁸ cm / 4.50 cm) (97.5 cm) = 1.28 × 10⁻⁶ cmTherefore, the wavelength of light is 1.28 × 10⁻⁶ cm.

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Answer:

3.626 m/s

Explanation:

v=d/t

1. -0.02/0 = 0 m/s

2. 0.86/0.2 = 4.3 m/s

3. 1.71/0.4 = 4.275 m/s

4. 2.54/0.6 = 4.23 m/s

5. 3.32/0.8 = 4.15 m/s

6. 4.08/1.0 = 4.08 m/s

7. 4.79/1.2 = 3.99 m/s

8. 5.48/1.4 = 3.91 m/s

9. 6.15/1.6 = 3.84 m/s

10. 6.76/1.8 = 3.76 m/s

11. 7.37/2.0 = 3.66 m/s

12. 7.92/2.2 = 3.6 m/s

13. 8.45/2.4 = 3.52 m/s

14. 8.96/2.6 = 3.45 m/s

the mean of these numbers is 3.626

his average velocity ks 3.626 m/s

Answer:

P = 12000 W

Explanation:

General data:

Work is force times unit of distance. So in order to calculate the power we must first calculate the work.

Formula:

Replace and solve

once the work is found, we proceed to find the power according to the formula:

The power of the crane is 12000 Watts.

Greetings.

The emission power of sun is 3.868 * \(10^{26}\) W

We know that,

Energy flux on earth = Emission power of sun / 4 π \(r^{2}\)

where,

r = Distance between sun and earth

Given that,

Energy flux on earth = 1368 W / \(m^{2}\)

Diameter of sun = 1.39 * \(10^{9}\) m

Diameter of earth = 1.27 * \(10^{7}\) m

r = 1.5 * \(10^{11}\) m

Emission power of sun = 1368 * 4 * 3.14 * ( 1.5 * \(10^{11}\) \()^{2}\)

                                      = 1368 * 2.828 * \(10^{23}\)

Emission power of sun = 3.868 * \(10^{26}\) W

Energy flux is the rate of transfer of energy through a surface. The unit of total rate of energy transfer is W = J / s. The unit of specific rate of energy transfer is W / \(m^{2}\) = J / \(m^{2}\) s

Therefore, The emission power of sun is 3.868 * \(10^{26}\) W

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The translational speed of the barrel at the bottom of the hill can be determined using the principles of conservation of energy and rotational motion.

To start, we need to find the potential energy of the barrel at the top of the hill. The potential energy (PE) is given by the formula PE = mgh, where m is the mass of the barrel, g is the acceleration due to gravity, and h is the height from which the barrel is released. In this case, m = 25.0 kg, g = 9.80 \(m/s^2\), and h = 23.0 m.

PE = (25.0 kg) * (9.80 \(m/s^2\)) * (23.0 m) = 5555 J

Next, we need to find the kinetic energy of the barrel at the bottom of the hill. The kinetic energy (KE) is given by the formula

KE = 0.5 * I * \(ω^2\),

where I is the moment of inertia and ω is the angular velocity.

The moment of inertia for a cylindrical barrel rolling without slipping is I = 0.5 * m * \(r^2\), where m is the mass of the barrel and r is the radius. In this case, m = 25.0 kg and r = 0.325 m.

\(I = 0.5 * (25.0 kg) * (0.325 m)^2 = 1.6506 kg·m^2\)

Since the barrel rolls without slipping, the angular velocity (ω) is related to the translational speed (vf) by the equation ω = vf / r, where r is the radius.

Now, we can use the conservation of energy to find the translational speed at the bottom of the hill. The total mechanical energy (E) is equal to the sum of the potential energy and the kinetic energy, and it remains constant throughout the motion.

E = PE + KE
\(E = 5555 J + 0.5 * (1.6506 kg·m^2) * (vf / 0.325 m)^2\)

Solving for vf, we can rewrite the equation as:

\(vf = √(2 * (E - PE) / (m / 0.325^2))\)

Substituting the values, we get:

\(vf = √(2 * (5555 J - 5555 J) / (25.0 kg / 0.325 m)^2)\)
\(vf = √(2 * 0 / (25.0 kg / 0.325 m)^2)\)
\(vf = √(0 / (25.0 kg / 0.325 m)^2)\)
vf = √0
vf = 0 m/s

Therefore, the translational speed of the barrel at the bottom of the hill is 0 m/s. This means that the barrel comes to rest at the bottom of the hill.

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Answer:

I'm not sure if the directions affect the speed tho

but I think it's 4? cause it's the speed relative to the ground

hope this helps:))

The statement given "Galileo's early telescopes revealed the four large moons of Jupiter, the rings of Saturn, and its large moon Titan." is true because Galileo's early telescopes revealed the four large moons of Jupiter, the rings of Saturn, and its large moon Titan.

Galileo Galilei, an Italian astronomer, made significant observations using his early telescopes. His observations provided evidence to support the heliocentric model of the solar system proposed by Copernicus. With his telescope, Galileo discovered four large moons orbiting Jupiter, which are now known as the Galilean moons: Io, Europa, Ganymede, and Callisto. He also observed and documented the presence of rings around Saturn and identified its largest moon, Titan. These observations revolutionized our understanding of the solar system and provided critical evidence for the heliocentric model.

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The statement that is NOT true is: "the magnetic field lines always cross one another."

Magnetic field lines do not cross one other since they depict the direction of the magnetic field at every position in space. The crossing of two field lines would cause the magnetic field to have two opposite directions at the same spot, which is not possible.

The magnetic field's direction is determined by the orientation of the magnetic dipole moment at its source of starting.

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The frequency of the second harmonic of a note with a fundamental frequency of 200 Hz is 400 Hz, and the frequency of the third harmonic is 600 Hz.

To calculate the harmonics of a note, you will need to know the fundamental frequency of the note. The frequency of the second harmonic is twice the fundamental frequency, and the frequency of the third harmonic is three times the fundamental frequency. For example, if the fundamental frequency is 200 Hz, then the frequency of the second harmonic is 400 Hz and the frequency of the third harmonic is 600 Hz.

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