if the intensity of radiation 3.0 cm from a source is 300. mci, what is the intensity 1.0 cm from the source?

A discordant igneous intrusion cuts across bedding planes. Here is the detailed explanation of the given question:Explanation:The Discordant igneous intrusion is the formation of an igneous rock mass when magma is injected into a host rock and cools there.

This form of igneous intrusion does not conform to the stratification or layering of the existing rock mass because it cuts across it.Therefore, a discordant igneous intrusion cuts across bedding planes.Option (a) is correct. It is the only option that describes the features of discordant igneous intrusion. Hence, the correct answer is option (a).

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Answer:

The most likely form of precipitation that may occur when the clouds are very grey and the temperature outside is -3°C is snow.

Explanation:

The amount of power required to lift 250 N over 4 m high in 2 seconds is 5000 W.

Power can be defined as the ratio of the work done by a body to the time taken to do the work.

To calculate the power, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the amount of power required is 5000 W.

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When a nerve cell fires, charge is transferred across the cell membrane to change the cell's potential from negative to positive. The average current through the cell membrane is 21.1 mA.

For a typical nerve cell, 9.5 pC of charge flows in a time of 0.45 ms. Express your answer to two significant figures and include the appropriate units. Given that: Charge, q = 9.5 pC. Time, t = 0.45 ms. Formula Used: I = q/t. Where,

I = Currentq =

Charge through cell membranet = Time.

Average current through the cell membrane is calculated as:I = q/tSubstituting the given values, we get: I = 9.5 pC/0.45 msI = 21.1 mATherefore, the average current through the cell membrane is 21.1 mA.

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In conclusion, when a point particle collides with a uniform stick on a frictionless horizontal surface, the common velocity of the stick and the particle after the collision can be determined using the equation v' = mv / (m + M).

In this scenario, we have a uniform stick with length l and mass m placed on a frictionless horizontal surface. A point particle of mass m is approaching the stick with a speed v on a straight line that is perpendicular to the stick and intersects it at one end.
When the particle collides with the stick, momentum is conserved. This means that the total momentum before the collision is equal to the total momentum after the collision.
Since the stick is initially at rest, its momentum is zero.

Therefore, the momentum of the particle before the collision is mv.
After the collision, both the stick and the particle will move together as a single system.

Let's assume that the stick and particle move with a common velocity v'. By applying the conservation of momentum, we have:
mv = (m + M) * v'
Here, M represents the mass of the stick.
We can rearrange this equation to solve for v':
v' = mv / (m + M)
This equation shows that the common velocity of the stick and particle after the collision is determined by the mass of the particle, the mass of the stick, and the initial velocity of the particle.
In conclusion, when a point particle collides with a uniform stick on a frictionless horizontal surface, the common velocity of the stick and the particle after the collision can be determined using the equation v' = mv / (m + M).

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At those instants, the energy of the wave has been transformed into the potential energy of the string.

This is because, during the wave's motion, the peaks and troughs move towards equilibrium. As they move, they store energy in the form of elastic potential energy, which is the energy stored in the string due to its stretching. When the wave is totally flat, the wave has reached equilibrium and the stored energy has been converted into potential energy. This is why the string appears flat at those instants.
The energy is not transformed into the kinetic energy of the string or the energy of sound waves. The nodes of the wave, where the string is flat, are points at which the wave's kinetic energy is zero, and the energy of sound waves is not produced by standing waves.

In conclusion, when a snapshot is taken of a standing wave on a string at certain instants, the energy of the wave is transformed into the potential energy of the string.

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We need to verify the thrid equation of kinematics here

\(\\ \tt\longmapsto v^2-u^2=2as\)

\(\\ \tt\longmapsto 20^2=2(-8)s\)

\(\\ \tt\longmapsto 400=-16s\)

\(\\ \tt\longmapsto s=|400/-16|\)

\(\\ \tt\longmapsto s=25m\)

The squirrel has a good luck ,Car gets stopped just 1m away from the squirrel .

Explanation:

According to the Question

A squirrel runs out in front of a car moving at +20m/s ( initial speed u) . The driver slams on the brakes and begins decreasing at -8m/s² ( here the acceleration is acting in opposite directions of motion a )

When Squirrel was 26 metres ( Distance from the car initially )

Using Kinematic Equation

On substituting the value we obtain

➥ 0² = 20² + 2 × -8 × s

➥ 0 = 400 - 16 × s

➥ -400 = -16 × s

➥ 400/16 = s

➥ 25 = s

So, the squirrel is 25 metres from the car .

It is true that without exception, instructions in Python are processed sequentially, from first to last in the program—a straight-line algorithm.

The not-in operator in Python works in the exact opposite way as the in-operator. It also checks to see whether a certain value exists inside a specified sequence, but the results are fundamentally different from those of the in-operator.

The logical inverse. There is a logical opposite for each of the six relational operators. For example, although we can get a driver's license if we are at least 17, we cannot get one if we are under 17. Take notice that this is the inverse of >=.

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The pair of quantities expressed in the same units of measure is B. work and energy. Work and energy are both expressed in the same units of measure.

Both work and energy are measured in joules (J) in the International System of Units (SI). Joules represent the amount of energy transferred or work done.

Work is defined as the transfer of energy that occurs when a force is applied to an object and causes it to move in the direction of the force. The work done on an object is equal to the force applied multiplied by the distance over which the force is exerted. The unit of work, joules, represents the amount of energy transferred.

Energy, on the other hand, is the ability to do work or transfer heat. It exists in various forms, such as kinetic energy (energy of motion), potential energy (energy stored due to position), and thermal energy (energy associated with temperature). Energy is also measured in joules.

Friction and weight, mentioned in option A, are not expressed in the same units of measure. Friction is a force and is typically measured in newtons (N), while weight is a force caused by gravity and is also measured in newtons.

Therefore, the pair of quantities expressed in the same units of measure is B. work and energy.

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Answer:

v = 1.5 [m/s]

Explanation:

This problem can be solved using the definition of velocity which is the relationship between space and time.

v = x/t

where:

v = speed [m/s]

x = distance = 105 [m]

t = time = 70 [s]

v = 105/70

v = 1.5 [m/s]

Answer:time.

v = x/t

where:

v = speed [m/s]

x = distance = 105 [m]

t = time = 70 [s]

v = 105/70

v = 1.5 [m/s]

Explanation:time.

v = x/t

where:

v = speed [m/s]

x = distance = 105 [m]

t = time = 70 [s]

v = 105/70

v = 1.5 [m/s]

The given statement " rotating the tree at branch point 2 would change the relationship between taxa d and a " is True. Because,  Rotating the tree at branch point 2 would change the relationship between taxa d and a.

In a phylogenetic tree, taxa are represented as nodes and branches, with each node representing a common ancestor and each branch representing evolutionary relationships. The placement of taxa on a branch is based on  similarity of their characteristics or genetic sequences. Rotating a tree at a branch point involves changing position of the nodes and branches while maintaining relationship between taxa. In given scenario, rotating  tree at branch point 2 would change order in which the taxa are related to each other .

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Answer:

well i know that the horizontal rows are called periods and the vertical ones are called groups

Explanation:

I don't really know what this question is exactly asking

Answer:

Breaker

Explanation: A wave is a motion or disturbance that transfers energy from one location to another without any permanent displacement of the particles involved in the wave motion.

Wave motion can occur in various media such as water, air etc a wave is described as a breaker when it steepens and before it finally stops or losses its energy/collapses.

Answer:

a

Explanation:

just did it on a p e x

Aluminum oxide consists of one aluminum ion (Al3+) and two oxygen ions (O2-) chemically bonded together to form the compound Al2O3. The correct option is A.

A chemical bond is a force of attraction that holds two or more atoms together in a molecule or compound. Atoms can bond together by sharing or exchanging electrons in their outermost energy levels, which is also known as the valence shell.

There are three main types of chemical bonds:

Covalent bond: This bond occurs when two or more atoms share electrons in their outermost energy level. Covalent bonds are strong and are commonly found in molecules of compounds like water (H2O) and methane (CH4).

Ionic bond: This bond occurs when one atom donates one or more electrons to another atom, forming oppositely charged ions that are then attracted to each other. Ionic bonds are strong and are commonly found in compounds like table salt (NaCl) and calcium chloride (CaCl2).

Metallic bond: This bond occurs between atoms of metallic elements, where their outer electrons are delocalized and shared among all the atoms in the metallic structure. Metallic bonds are strong and are responsible for the properties of metals like malleability and conductivity.

Chemical bonds are essential for the formation of molecules and compounds that make up all matter in the universe. Understanding chemical bonds is crucial for fields such as chemistry, biology, and materials science.

Here in the Question,

Option B, "A12+ and O3-", is not true because aluminum ions, in their stable state, lose three electrons to form a +3 ion, not a +2 ion.

Option C, "A13- and O2+", is not true because aluminum ions, in their stable state, lose three electrons to form a +3 ion, not a -3 ion.

Option D, "A12- and O3+", is not true because oxygen ions, in their stable state, gain two electrons to form a -2 ion, not a +3 ion.

Therefore, option A, "Al3+ and O2-", is the correct answer as aluminum oxide consists of one aluminum ion with a charge of +3 and two oxygen ions, each with a charge of -2, that bond together to form the compound Al2O3.

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Quantization of electron energy states in an atom is a fundamental concept in atomic physics and quantum mechanics. It refers to the discrete and distinct energy levels that an electron can occupy in an atom.

This quantization is better understood in terms of the electron's wave-like nature. The electron behaves like a wave, and its energy is related to the wavelength and frequency of the wave.
The wave-like behavior of the electron was first proposed by Louis de Broglie in 1924, and it was later confirmed by experiments. According to de Broglie's theory, electrons have wave-particle duality, meaning that they can exhibit both wave-like and particle-like behavior. When an electron is confined to an atom, its wave-like behavior leads to the quantization of energy levels.
The quantization of energy levels in an atom arises from the fact that electrons can only occupy specific orbitals around the nucleus. These orbitals have specific energies associated with them, and the electron can only exist in one of these energy levels. When an electron absorbs or emits energy, it must do so in discrete packets or quanta, which correspond to the energy difference between the energy levels.
In summary, the quantization of electron energy states in an atom is a consequence of the wave-like nature of the electron. It arises from the fact that electrons can only occupy specific orbitals around the nucleus, and their energies are quantized in these orbitals. This concept is fundamental to our understanding of atomic structure and has important implications for a wide range of fields, including chemistry, materials science, and electronics.

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Torque =   force x distance from point of rotation

Torque is a measure of the turning effect of an applied force about a specific point or axis. It is calculated by multiplying the force applied to an object by the distance from the point of rotation to the point where the force is applied. The greater the force or the longer the distance from the point of rotation, the greater the torque. The unit of torque is typically Newton-meters (N·m) in the International System of Units (SI) or pound-feet (lb·ft) in the imperial system. Torque is essential in various fields such as physics, mechanics, engineering and robotics.

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In a reaction, reactants are the substances on which the reaction takes place. The reactants undergo changes to form the products.

Consider the following reaction:

C + O₂ ---> CO₂

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Answer: The balloons repel each other but attract the rabbit fur.

Brainliest pwease if I could do you any help!

Here, both the balloons gains a negative charge through rubbing and they attracts to the neutral rabbit fur. But the balloons themselves repel each other. Hence, option B is correct.

When a  material rub on a surface its electrons gets aligned and acquire a negative charge. This negative charge when comes in contact with a neutral material, the second one get partially polarized and gets attracted to the negative charge.

This flow of electrons through induced polarization is called static electricity. When the balloon are rubbed with the neutral rabbit fur and gets negatively charged by friction.

This negatively charged balloons repel each other but they induce a polarity to the neutral rabbit fur and its positive charges gets aligned with the negative charges results in electrostatic attraction.

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To write the wave equation for the electric field of an electromagnetic wave traveling in the +x direction with a wavelength of 2.0 m and an amplitude of 100 N/C,

1. Identify the given values: amplitude (E0) = 100 N/C, wavelength (λ) = 2.0 m.
2. Calculate the wave number (k) using the formula: k = 2π / λ.
3. Calculate the angular frequency (ω) using the formula: ω = 2πf, where f is the frequency. First, find the frequency (f) using the formula: f = c / λ, where c is the speed of light (3.0 x 10^8 m/s).
4. Write the wave equation in terms of E, x, t, k, and ω: E(x, t) = E0 * sin(kx - ωt).

Now, let's calculate k and ω:

k = 2π / λ = 2π / 2.0 m = π m^-1
f = c / λ = (3.0 x 10^8 m/s) / 2.0 m = 1.5 x 10^8 Hz
ω = 2πf = 2π(1.5 x 10^8 Hz) = 3π x 10^8 s^-1

Finally, plug in the values to get the wave equation:
E(x, t) = 100 N/C * sin(πx - 3π x 10^8 t)

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Answer:

2. Repulsion

Explanation:

number two is the answer

Answer:

Repulsion is the surest test which confirms that the given piece of the object is a magnet.

........

Answer:

30 ml

Explanation:

it is very easy

The condition for the first dark fringe through a single slit of width w is when the path difference between the rays passing through the top and bottom edges of the slit is half a wavelength, which causes destructive interference and results in a dark band on the screen.

This can be expressed mathematically as sin θ = λ/w, where θ is the angle between the direction of the incoming light and the direction of the diffracted light, λ is the wavelength of the light, and w is the width of the slit.

The condition for the first dark fringe in a single-slit diffraction pattern occurs when the path difference between adjacent rays is equal to half the wavelength (λ/2). This can be represented by the equation:

sin(θ) = λ/(2w)

where θ is the angle of the first dark fringe, λ is the wavelength of the light, and w is the width of the slit.

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The mechanical advantage (M.A) of a real

machine is always less than its velocity ratio (V.R.)

because mechanical advantage decreases due to the friction and weight of moving parts of the machine where as the velocity ratio remains constant.

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Answer:

applied force

Explanation:

any force where you push or pull is always applied force.

The necessary power to drive transport in the plant is 219.4 W.

A) To find the energy required to evaporate the water, we can use the equation Q = mL, where Q is the energy, m is the mass of the water, and L is the latent heat of vaporization. The latent heat of vaporization for water at 30°C is 2.43 x 10^6 J/kg. Plugging in the values, we get:
Q = (3.9 kg)(2.43 x 10^6 J/kg) = 9.477 x 10^6 J

B) To find the power, we can use the equation P = Q/t, where P is the power, Q is the energy, and t is the time. Plugging in the values, we get:
P = (9.477 x 10^6 J)/(12 hours x 3600 seconds/hour) = 219.4 W

Therefore, the necessary power to drive transport in the plant is 219.4 W.

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The vertical nature of the Hayashi track on the H-R diagram So, the correct answer to the question is b. The star remains the same luminosity.

Indicates that as a protostar moves along this track, its temperature remains roughly constant while its luminosity increases. This is because during the early stages of a star's evolution, it is powered by the release of gravitational potential energy as it contracts. As the protostar contracts, its interior becomes denser and hotter, and it emits more radiation, causing its luminosity to increase. However, the protostar remains relatively cool on the Hayashi track because it is still surrounded by a thick envelope of gas and dust that traps most of the radiation produced by the star's interior. This results in the star having a nearly constant temperature, and therefore a nearly constant color, as it moves vertically along the Hayashi track.

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Option B is correct. mgsin30 0 = ma. The speed of an object travelling down a surface is said to be unaffected by normal force.

An object's motion can be altered by normal force, which acts as centripetal force, but no work is done because acceleration is perpendicular to velocity. No jobs are finished using normal force. Fn doesn't do any work. That's accurate. The typical force is ineffective even when a block is moving up or down an incline. No part of the normal force is parallel to the motion; by definition, the normal force is perpendicular to the surface, and the block moves along the surface.

The down plane, a=gsin30 0 =5ms 2, is smooth.

b. mgsin30 0 K N = ma

a=gsin30 0 K cos30 0 =4ms2

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Assume that a 7.0 cm diameter, 120 W light bulb radiates all its energy as a single wavelength of visible light. The electric field strength at the surface of the bulb is 41.7 kV/m and  the magnetic field strength at the surface of the bulbis  1.19 μT.

To estimate the electric and magnetic field strengths at the surface of the light bulb, we can use the formula for the power density of an electromagnetic wave:

P/A = cε0E^2/2 = cμ0B^2/2

where P is the power radiated by the light bulb, A is the surface area of the bulb, c is the speed of light, ε0 is the electric constant, μ0 is the magnetic constant, E is the electric field strength, and B is the magnetic field strength.

We can first calculate the power density of the electromagnetic wave at the surface of the bulb:

P/A = 120 W/(π(0.035 m)^2) = 102.6 W/m^2

We can then rearrange the equation to solve for the electric field strength:

E = √(2P/(cε0A)) = √(2P/(cε0πr^2))

where r is the radius of the bulb (3.5 cm).

Plugging in the values, we get:

E = √(2(120 W)/(3.00 x 10^8 m/s)(8.85 x 10^-12 F/m)(π(0.035 m)^2))

E ≈ 41.7 kV/m

This is a very high electric field strength, but it is not unexpected for a high-powered light bulb.

To estimate the magnetic field strength, we can use the same equation and solve for B:

B = √(2P/(cμ0A)) = √(2P/(cμ0πr^2))

Plugging in the values, we get:

B = √(2(120 W)/(3.00 x 10^8 m/s)(1.26 x 10^-6 T·m/A)(π(0.035 m)^2))

B ≈ 1.19 μT

This is a relatively small magnetic field strength, but it is still measurable with sensitive instruments. The magnetic field strength is smaller than the electric field strength because the speed of light in a vacuum is larger than the magnetic permeability of free space.

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Answer:

135.3 cm + 93.46cm

= 228.76 cm

So total length of two fish is 228.76