Using the distance scale at the bottom of Figure 3.10, measure the distance from the ridge axis to the beginning of the normal polarity period C for each ridge. Place the distances on Figure 3.10. How many kilometers has the left side of each of these ocean basins spread during the past 2 million years?
South Atlantic basin = _______km, North Atlantic basin = ______ km, and Pacific basin = _______ km

Answer:

Nanomagnetic chips.

Explanation:

In a computer, the hard disk drive chips are magnetic.

A non-volatile data storage device is a computer hard disk drive (HDD). Non-volatile storage devices are those that retain data even after being turned off. HDDs are merely one form of storage device, yet they are required by all computers.

Desktop computers, mobile phones, consumer gadgets, and enterprise storage arrays in data centers are frequently equipped with HDDs. They can use magnetic disks to store operating systems, applications, and other things.

Hence, Hard disk drive is belongs to one of those chips which at magnetic in nature.

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The potential function and the gravitational field intensity function inside and outside of a thin ring with radius R, in terms of r (the distance from the center of the ring to the field point), are as follows:

Inside the ring (r < R): The potential function is given by V = -GM/r, and the gravitational field intensity function is E = GM/r², where G is the gravitational constant and M is the mass of the ring.

Outside the ring (r > R): The potential function is V = -GM/r + GM/R, and the gravitational field intensity function is E = GM/r², where G is the gravitational constant, M is the mass of the ring, and R is the radius of the ring.

Inside the ring (r < R), the potential function is given by V = -GM/r. This represents the gravitational potential due to the mass of the ring at a point inside the ring. The negative sign indicates that the potential decreases as the distance from the center of the ring decreases. The gravitational field intensity function is E = GM/r², representing the strength of the gravitational field at a point inside the ring. The field intensity decreases as the distance from the center of the ring increases, following an inverse square relationship.

Outside the ring (r > R), the potential function is V = -GM/r + GM/R. In addition to the potential due to the mass of the ring, there is an additional potential term GM/R, which arises from considering the ring as a point mass located at its center. The gravitational field intensity function remains the same as E = GM/r², indicating that outside the ring, the gravitational field follows an inverse square relationship with the distance from the center of the ring.

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The normal acceleration of the car going around the turn with a radius of 100 ft at 54 miles/hr is approximately 0.635 Gs.

To calculate the normal acceleration of the car, we need to use the formula:

Normal acceleration = (Velocity²) / Radius

Velocity of the car = 54 miles/hr

Radius of the turn = 100 ft

First, we convert the velocity from miles per hour to feet per second:

Velocity = 54 miles/hr × (5280 ft/mile) / (3600 s/hr) = 79.2 ft/s

Substituting the values into the formula:

Normal acceleration = (79.2 ft/s)² / 100 ft

Normal acceleration ≈ 0.635 Gs

Note: 1 G is equal to the acceleration due to gravity, which is approximately 32.2 ft/s². So, the normal acceleration of 0.635 Gs means that the car experiences an acceleration 0.635 times that of the acceleration due to gravity.

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the complete question is:

car goes around a turn at 54 miles/hr. If the turn has a radius of 100 ft what is it's normal acceleration in Gs (1G-32.2ft/s^2)?

The wavelengths of visible light are really not interfere constructively  affected with by reflected waves.

When the maximum of two waves are combined together in a way that makes the amplitude of the resulting constructive wave equal to the sum of the separate waves, this is known as constructive interference, or doppler effect is the interference.

Briefing :

The constructive interference for two waves, in same phase can be find out as,

λ = \(\frac{2'nd}{m}\)

Here, m=1,2,3,....

The range of wavelengths of visible light given from 550 nm to 750 nm. It  has to be found out that, for which visible wavelengths of light, do the reflected waves interfere constructively,

Visible wavelength of light is a range of electromagnetic spectrum, which can be visible by human eyes. This ranges from 550 nm to 700 nm (approx). In the problem given, the range of wavelengths of visible light is from 550 nm to 750 nm.

Put the value of the 2nd wavelength (750 nm) in the above formula for m equal to 1 as,

λ = \(\frac{750}{1}\)

λ = 750nm

For m equal to 2,

λ =\(\frac{750}{2}\)

λ = 375nm

Both the values does not fall under the range of visible light. Hence, The visible wavelengths of light do not reflected waves interfere constructively.

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Answer:

Explanation:

chemical energy  :)   yay...  we can live  :D  

Answer:

Option (a) is correct

Explanation:

The acceleration of an object is defined as the rate of change of velocity. Mathematically, it can be written as :

\(a=\dfrac{v-u}{t}\)

Where

v and u are final and initial velocity

It is clear that if there is some change in velocity, it means the object is experiencing either acceleration or deceleration. Hence, the correct option is (a).

Answer:

a

Explanation:

The order of the given frequencies from lowest to loudest at 30 dB is: a. 63 Hz, b. 1,000 Hz, c. 8,000 Hz.

The loudness of a sound is measured in decibels (dB), while the pitch or frequency is measured in hertz (Hz). However, at the same dB level, not all frequencies are perceived as equally loud.

The human ear is more sensitive to frequencies around 1,000 Hz, so a sound at 1,000 Hz needs less intensity to be perceived as loud as sounds at other frequencies.

In this case, all the given frequencies have the same sound intensity level of 30 dB, so the order of loudness depends on their frequency. The frequency of 63 Hz is the lowest and is perceived as less loud than the other two frequencies.

The frequency of 8,000 Hz is the highest and is perceived as the loudest among the given frequencies. Finally, the frequency of 1,000 Hz is in the middle and is perceived as somewhat loud.

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The wavelength (in nm) of an electron in a sodium atom = 300.2 nm

h = 6.62607015 × 10^−34 joule second.

m =9.11 x 10 ^-31 Kg

v = 2.42 x 10^ 4 m/s

λ = h / ( mv) =  3.002 x 10^ -7 m

= 300.2 nm.

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The wavelength of the radio waves emitted by the radio station is approximately 3.38 meters. This means that the radio waves have a relatively long wavelength and can travel long distances, which is why radio waves are commonly used for broadcasting signals.

To determine the wavelength of the radio waves emitted by the radio station, we can use the formula:

wavelength = speed of light / frequency

The speed of light is approximately 299,792,458 meters per second. However, the frequency of the radio station is given in megahertz, which is a unit of frequency equal to one million hertz. To convert megahertz to hertz, we need to multiply by one million.

Therefore, the frequency of the radio station in hertz is:

88.7 MHz x 1,000,000 = 88,700,000 Hz

Now, we can substitute the values into the formula:

wavelength = 299,792,458 m/s / 88,700,000 Hz = 3.38 meters

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mass = 2.76 g

volume = 25.5 mL

density of the fluid = 2.5 g/mL

R. D = Density of fluid

Density of water

Density of water = 1g/mL

R. D = 2.5/1

R. D = 2.5

Answer:

A

Explanation:

potential energy is usually at rest at the highest point in comparason to the ground

Answer:

. tt tt t t t t t t tt t tt t t jk j k j k j k j k jk k j k jk

When a rifle fires at a distant target, the barrel should be pointing straight towards the target.

This is because the barrel is the part of the rifle that the bullet travels through to reach the target. If the barrel is not pointing directly at the target, the bullet may not hit it.

Therefore, it is important to aim the barrel accurately when shooting a rifle at a distant target.

A rifle is a long gun designed to be fired from the shoulder, with a barrel that has spiral grooves (rifling) cut into the inside of the barrel wall that forces the bullet to rotate as it moves out of the barrel.

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Answer:

x = 3.6 10⁷ m

Explanation:

The speed of an electromagnetic wave is constant, in a vacuum its value is    c = 3 10⁸ m / s, this speed decreases when entering a material medium,

         v = c / n

where n is the refractive index, but in this case the refractive index of air is n = 1.00002. The refractive index of a vacuum is n = 1, so we can assume that the change in velocity is negligible.

For the calculation we can use the relations of the uniform motion

        v = x / t

        x = v t

let's calculate

        x = 3 10⁸ 0.12

        x = 3.6 10⁷ m

Answer:

Below

Explanation:

Find acceleration first

vf = vo + at     (starts from rest so vo = 0)

8 = 0 + at    

8 = at

d = vo t + 1/2 a t^2     (substitute 8 in for 'at')

200 = 0 t  + 1/2 (8) t

200 / 4 = t = 50 seconds for front of train to pass her at 8 m/s

  acceleration = change in velocity / change in time = 8 / 50 = .16 m/s^2

Back of train has to travel 120 meters at initial v = 8 m/s  and accelerating  at .16 m/s^2   :

  d = vo t + 1/2 a t^2

 120 = 8 t + 1/2 ( .16 ) t^2

           .16t^2 + 8t - 120 = 0      Quadratic Formula shows t = 13.25 s

vf = vo  + a t

vf = 8 m/s  + .16 m/s^2 ( 13.25 s) = 10.1 m/s

The speed of water at the end of spillway is 58.5 (m/s)

Calculation:

According to the Bernoulli equation:

P/x + v^2/2 + gz = constant

The initial vertical height of 175 m

However, the atmospheric pressure and density are essentially the same at the peak and bottom of the falls. Therefore,

v^2/2 + gz = constant , so:

v_bottom^2/ 2 = v_top^2/2 + gz, or:

v_bottom = √(v_top^2 + 2gz) = √(v_top^2 + 2g*175)

If v_top ≈ 0, then:

v_bottom = √(2gz) = √(2*9.8*175) = 58.5  (m/s)

What is the flow rate of water?

The amount of water that might theoretically flow out of your kitchen faucet or bathtub each minute is measured by your water flow rate, sometimes referred to as the gallons per minute (GPM). the flow rate is affected by a number of variables, but the household size is the most important one.

Therefore,  the highest possible speed of the water at the end of the spillway is 58.5m/s

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☄ Universal Gravitational Constant(G)

Gravitational constant is a constant of proportionality when F(Gravitational force) is proportional to product of masses and inversely proportional to the distance between them.

The value of G (universal gravitational constant) was found out by the scientist Henry Cavendish by using the sensitive torsion balance\(.\)

━━━━━━━━━━━━━━━━━━━━

Answer:

Here is the answer. Hope this helps you!

Explanation:

Now, from Universal law of gravitation, we come to know that:

F= force of attraction

M = the object with greater mass (taken from centre of the objects)

m = object with smaller mass (taken from centre of the objects)

d = distance (taken from centre of the objects)

F ∝ Mm

F ∝ 1/d²

Therefore, we get the formula

F ∝ Mm/d²

F = GMm/d²

Here, G is the constant of proportionality. It also accepted as the Universal gravitation constant. It has a value of 6.67*10^-11 Nm^2/kg^2.

The universal gravitation constant has allowed us to use the above formula to help us calculate and come to know about

Decreasing the mass of the car will help increase the acceleration of the car using application of Newton’s laws of motion.

This law discusses the relationship between motion of a substance and the forces acting on it.

Heavy objects are more difficult to move which is why decrease in mass will help increase the acceleration.

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Answer: decreasing the mass of the car

Explanation: this is for a TLDR trust

The expression sin 20° cos 40° + cos 20° sin 40°. So, the exact value of the given expression is √3/2.

The expression sin 20° cos 40° + cos 20° sin 40° can be written using the trigonometric identity for the sine of the sum of two angles:

sin(A + B) = sin A cos B + cos A sin B

Comparing this with the given expression, we can see that it matches the form of the sine of the sum of two angles. Therefore, we can rewrite the expression as:

sin(20° + 40°)

Now, let's calculate the exact value of the expression:

sin(20° + 40°) = sin 60°

The exact value of sine 60° is √3/2.

Therefore, the exact value of the given expression is √3/2.

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complete question :

Write the expression as the sine, cosine, or tangent of an angle. Then find the exact value of the expression.

sin 20° cos 40° + cos 20° sin 40° = ?

Answer:

CODIS should be the answer

Answer:

im just 15 yearsold hehhez i dont know that either

Studies of sunquakes, or helioseismology, have revealed that our mathematical models of the solar interior are fairly accurate. The correct option is (B).

Helioseismology is the study of the Sun's internal structure and dynamics by analyzing its oscillations.

These oscillations, often referred to as sunquakes, are caused by sound waves trapped and bouncing within the Sun. By studying the properties and behavior of these waves, scientists can gain valuable insights into the solar interior.

Through helioseismology, scientists have found that our mathematical models of the Sun's interior, based on principles of physics and stellar evolution, align quite well with the observed data.

The oscillation patterns and frequencies detected from the Sun match the theoretical predictions, providing confidence in our understanding of the Sun's internal structure, composition, and energy generation mechanisms.

A) the Sun vibrates only on the surface.

Helioseismology studies have revealed that the Sun vibrates not only on its surface but throughout its interior as well. Therefore, option A is incorrect.

Overall, helioseismology has contributed significantly to our knowledge of the Sun's dynamics and has validated our mathematical models, making option B the correct answer.

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Answer:

C

Explanation:

Alpha decay is a type of nuclear decay occurring by the emission of alpha particles. Thus the nuclei changes to a new nuclei with mass number decreased by 4 units and atomic number decreased by 2 units from the parent atom.

Nuclear decay is the process of radioactive decay of unstable isotopes to form its stable isotopes or new nuclei.  Unstable atoms undergo nuclear decay by the emission of alpha or beta particles or by  electron capture.

In alpha decay,  an alpha particle that is a helium nuclei is emitted with the new nuclei where the mass number reduces by 4 and atomic number reduces by 2.

For instance consider the alpha decay of carbon -14 produces stable beryllium -10 with an alpha particle.

\(\rm _{6}^{14}C \rightarrow _{10}^{4}Be + _{2}^{4}He\).

Similarly in beta decay, an electron is emitted where the atomic number increases by one and mass number does not change.

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We do not observe the wave-like nature of an object such as a quickly rolling bowling ball because the length of the wave is much shorter than the diameter of the ball.

As far as we know, matter possesses both wavelike and particle-like characteristics.  According to de Broglie hypothesis, waves flow in straight lines and exhibit minimal interference when they come into contact with things that are significantly bigger than their wavelength (for example light rays in geometric optics). The longest wavelength &, therefore, the lightest mass achievable would be beneficial to obtain easily seen interference mostly from matter particles. Thus, this phenomenon was first noticed in electrons. A wave must come into contact with an object that is similar in size just like its wavelength to produce noticeable interference effects. Furthermore, we might assert that wave nature only reveals itself in tiny things like electrons and neutrons.

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