An is the conducting connection between electrical equipment or an electrical circuit and the earth

1) Ions: H⁺ and OH⁻ ; 2) Ions: Na⁺ and Cl⁻ ; 3) Ions: K⁺ and Br- ;  4) Ions: Na+ and OH⁻ ; 5) Ions: Ca²⁺ and CO₃²⁻

1) H₂O
Ions: H⁺ and OH⁻
The hydrogen ion (H⁺) has a positive charge and the hydroxide ion (OH⁻) has a negative charge.

2) NaCl
Ions: Na⁺ and Cl⁻
The sodium ion (Na⁺) has a positive charge and the chloride ion (Cl⁻) has a negative charge.

3) KBr
Ions: K⁺ and Br-
The potassium ion (K⁺) has a positive charge and the bromide ion (Br⁻) has a negative charge.

4) NaOH
Ions: Na+ and OH⁻
The sodium ion (Na⁺) has a positive charge and the hydroxide ion (OH⁻) has a negative charge.

5) CaCO₃
Ions: Ca²⁺ and CO₃²⁻
The calcium ion (Ca²⁺) has a positive charge and the carbonate ion (CO₃⁻) has a negative charge.

In summary, the different compounds have different ions that make them up, each with their own specific charge. Understanding the ions present in a compound is important in many areas of chemistry and can help us understand the properties and behavior of substances.

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Answer:

the direction of the angular velocity of the wheels is north  

Answer:

word done = fore * distance moved by the force, so 11n * 0.8=8.8j then 8.8 * 6=52.8j

but all the books at ones means, 6*11=66N

and 66*0.8 = 52.8j

Explanation:

The work done is equal..

Identical forces act for the same length of time on two different objects. the magnitude of the change in momentum of the lighter object is: c. exactly equal to the magnitude of the change in momentum of the larger mass.

if a ball is thrown at a guy and strikes him in the face. It illustrates how difficult it would have been to stop the scenario. A baseball is flying through the air. An enormous truck is moving. This kind of gun fired a bullet. Momentum is measured by "mass velocity" since it depends on the body's motion's velocity and direction. Since mass is a scalar and velocity is a vector, momentum is a vector quantity. Momentum is the product of mass and speed.

Identical forces act for the same length of time on two different objects. the magnitude of the change in momentum of the lighter object is: _________a. larger than the magnitude of the change in momentum of the larger mass. b. smaller than the magnitude of the change in momentum of the larger mass, but not zero. c. exactly equal to the magnitude of the change in momentum of the larger mass. d. There is not enough information to answer the question zero.

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From the formula for coulomb's, the formula for k would be k = Fd²/q1q2.

Here, we are required to solve for k from the Coulomb's formula, F=kq1q2/d².

Solving the formula for k, we obtain;

k = Fd²/q1q2

To solve the formula for k, we need to make k the subject of the formula;

F = kq1q2/d²

Then, F × d² = kq1q2

Therefore, to make k the subject of the formula; we divide both sides of the equation by q1q2.

Therefore, k = Fd²/q1q2.

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Complete question

Coulomb's Law is given by the formula

F=kq1q2/d2

The force F between two charges q1 and q2 in a vacuum is proportional to the product of the charges, and is inversely proportional to the square of the distance d between the two charges. Solve the formula for k.

Answer:

A = 2 π R^2 + 2 π R H      total area of cylinder

A / (2 π R) = R + H     at given conditions

H = 800 / (2 π 10) - 10 = 800 / 62.832 - 10 = 2.732

dA / dt = 2 π (2 R dR/dt+ R dH/dt + H dR/dt)      from first equation

0 = 2 R dR/dt + R dH/dt + H dR/dt

R dH/dt = -(2 R dR/dt + H dR/dt)

dH / dt = -dR/dt  (2 + H / R)

dH / dt = -5 (2 + 2.732 / 10) = -5 * (2 + .2732) = -11.366

sheesh sheesh                                                    

Explanation:

The statement "The first harmonic is equal to the first overtone" is false. The first harmonic and the first overtone are two distinct concepts in the study of waves and vibrations.

The first harmonic, also known as the fundamental frequency, is the lowest frequency at which a system can vibrate. It corresponds to a single wavelength with one node and one antinode. In other words, the entire medium vibrates in phase.

The first overtone, also known as the second harmonic, is the next higher frequency at which a system can vibrate. It corresponds to two wavelengths with two nodes and one antinode. In this case, the medium vibrates in two equal segments, with opposite phases.

Therefore, the first harmonic and the first overtone are not equal, as they represent different frequencies and modes of vibration in a system.

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By studying the emission, reflection, refraction, and absorption of energy from objects, scientists can gather valuable information about their properties, composition, and behavior.

We can learn about objects of interest through matter/energy interaction using various processes such as emission, reflection, refraction, and absorption. Here's how each process provides information:

1. Emission: Objects can emit energy in the form of light or other electromagnetic radiation. By studying the emitted radiation, we can gather information about the object's composition, temperature, and other properties. For example, analyzing the emission spectra of stars helps us determine their chemical composition.

2. Reflection: When light or other forms of energy strike an object, they can bounce off or reflect from its surface. By analyzing the reflected energy, we can gather information about the object's appearance, surface properties, and color. For instance, studying the reflection of radar signals can provide information about the shape and structure of distant objects like planets or asteroids.

3. Refraction: Refraction occurs when energy, such as light, passes through a medium and changes direction. By observing how light bends or changes its path while passing through an object, we can learn about its optical properties and the medium it interacts with. Refraction is utilized in techniques like spectroscopy to analyze the composition of materials.

Absorption: When energy interacts with an object, it can be absorbed by the object's atoms or molecules. The absorption spectrum of an object provides information about the specific wavelengths of energy it absorbs. This allows us to identify the presence of certain elements or compounds. Absorption spectroscopy is commonly used in chemistry, astronomy, and other scientific fields to identify substances based on their unique absorption patterns.

By studying the emission, reflection, refraction, and absorption of energy from objects, scientists can gather valuable information about their properties, composition, and behavior. These techniques are widely used across various scientific disciplines, including astronomy, chemistry, remote sensing, and materials science.

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Answer:

O Intense rain or an earthquake

Explanation:

Landslides can be initiated in slopes already on the verge of movement by rainfall, snowmelt, changes in water level, stream erosion, changes in ground water, earthquakes, volcanic activity, disturbance by human activities, or any combination of these factors.

Intense rain or an earthquake can trigger a landslide.

In conclusion, intense rain or an earthquake can trigger a landslide.

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Answer:sorry i am only in 6 grade but this is a explanation

Explanation:Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.

Answer:

(a) the height of the diving board is 22.896 m

(b) the horizontal distance traveled by the girl is 7.02 m

(c) if she had just drop off the board, her time to drop to the water would have been longer.

Explanation:

Given;

initial speed of the girl, u = 3.9 m/s

time to hit the water, t = 1.8 s

(a) the height of the diving board is calculated as;

h = ut + ¹/₂gt²

h = (3.9 x 1.8)  +  ¹/₂ x 9.8 x 1.8²

h = 7.02 + 15.876

h =  22.896 m

(b) the horizontal distance traveled by the girl is calculated as;

X = ut

X = 3.9 x 1.8

X = 7.02 m

(c) if she just drop off the board, then the initial speed will be zero;

h = ut + ¹/₂gt²

h = 0 + ¹/₂gt²

2h = gt²

\(t^2 = \frac{2h}{g} \\\\t = \sqrt{\frac{2h}{g} } \\\\t = \sqrt{\frac{2 \ \times\ 22.896 }{9.8} }\\\\t = 2.16 \ s\)

Thus, if she had just dropped off the board, her time to drop to the water would have been longer.

The volume of the heated balloon = 3.08L

What is Charlee's Law?

Charlee's Law is a law in the United States that was passed in 2015 in honor of Charlee Campbell, a six-year-old girl who tragically died due to medical negligence. The law provides legal protection for children who are victims of medical malpractice or negligence. It requires that hospitals and other medical facilities take steps to prevent medical errors and notify parents or guardians prior to any medical treatment. It also requires medical practitioners to use a standardized system for documenting and communicating medical information, and for health care providers to complete annual training on preventing medical errors. Charlee's Law is an important step forward in protecting the rights of children in the medical setting.

You will need to use Charles' law to solve this problem. The equation is

V1/T1=V2/T2

V1 =2.50L

T1=323K

v2=?

T2=398K

Therefore V2 = V1T2/T1

  = (2.5  × 398 )/ 323

 = 3.08L

Therefore the volume of the heated balloon   = 3.08L

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Answer:

Average speed I think it's correct

A radioactive isotope's half-life is the length of time it takes for one half of it to decay.

The duration needed for a quantity of a radioisotope to decay by half is known as its radioactive half-life. If an isotope has a half-life of only a few hours or less, the majority of the radioactivity will dissipate within a few days.

A radioactive element's half-life is the amount of time it takes for it to decay to half of its original value. It can be concluded from this that a source's activity has a half-life if it takes some time before it drops to half its starting value.

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Answer:

Velocity towards east = 20m/s

Distance in 2 min(120 sec) = 20 x 120= 2400m = 2km

Velocity towards west = 15m/s

Distance in 2 min(120 sec) = 15 x 120 = 1800m = 1.8km

Separation= 2+1.8 = 3.8km

Explanation:

Hope it helps you:))))))

have a good day

Answer:

104.3 cm  or 179.7

Explanation:

First find time that it takes for the object to hit the ground

\(\sqrt{(2H)/g} -> \sqrt{(2 x 179)/ 9.8} = 6.04s\\\)*

Then find xf of projectile \(xf= 5.9(6.04) = 37.7\\\\\)

not 100% sure if the projectile is going away from the object or towards it but you either do 142- 37.7   or    142+37.7  

hope that helps

"217 cm" would be the difference throughout the landing locations of the two objects.

Given:

Initial horizontal speed,

Height,

By applying equation of motion, we get

→               \(S = ut+\frac{1}{2}at^2\)

By substituting the values, we get

→ \(179\times 10^{-2}=0+\frac{1}{2}\times 9.8\times t^2\)

→            \(3.58= 9.8t^2\)

                 \(t^2 =\frac{3.58}{9.8}\)

                  \(t = \sqrt{0.36531}\)

                     \(= 0.61 \ s\)

now,

The horizontal distance travelled by the first particle will be:

→ \(d = v\times t\)

     \(= 5.9\times 0.61\)

     \(= 3.59 \ m\)

or,

     \(= 359 \ cm\)

hence,

The distance between particle will be:

= \(d -142\)

= \(359-142\)

= \(217 \ cm\)

Thus the above approach is right.

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The slit separation is approximately 2.14 µm.

To find the slit separation, we can use the formula for double-slit interference:

sin(θ) = m * (λ / d)

where:
θ is the angle between the central maximum and the m-th dark fringe,
m is the order of the dark fringe (e.g., m = 1 for the first dark fringe),
λ is the wavelength of the light (450 nm),
d is the slit separation, and
tan(θ) ≈ y / L (small angle approximation).

In this case, we have:
y = 3.90 mm (distance between dark fringes),
L = 1.8 m (distance between the slits and the screen).

To find the angle θ, we use the small angle approximation:

tan(θ) = y / L
θ = arctan(y / L)

We also know that for dark fringes, m is an integer (1, 2, 3, ...), so we can use the formula for double-slit interference:

sin(θ) = m * (λ / d)

For the first dark fringe (m = 1), we have:

sin(arctan(y / L)) = λ / d

Now, we can solve for d:

d = λ / sin(arctan(y / L))

Plugging in the given values (λ = 450 nm, y = 3.90 mm, L = 1.8 m):

d = (450 nm) / sin(arctan(3.90 mm / 1.8 m))

After calculating, we get:

d ≈ 2.14 x 10^(-6) m or 2.14 µm

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The highest order dark fringe for a 561 nm light incident on a 1420 nm wide slit is the 3rd order.

Diffraction occurs when light passes through a narrow opening or slit, causing the wave to bend and interfere with itself. The pattern of bright and dark fringes produced by this interference is called a diffraction pattern. The position of these fringes can be determined using the equation d sin θ = mλ, where d is the width of the slit, θ is the angle of diffraction, m is the order of the fringe, and λ is the wavelength of the light.

Using this equation, we can calculate that the 3rd order dark fringe corresponds to an angle of approximately 5.68 degrees for a 561 nm light incident on a 1420 nm wide slit. Therefore, the highest order dark fringe in this situation is the 3rd order.

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Given,

Weight of a block on the Earth = 980 N

Acceleration due to gravity on Earth = 9.8 N/kg

To find,

Weight of the block on the moon.

Solution,

The  moon has acceleration (1/6) times that on earth. Let m be the mass of the block on the moon.

We know that,

W = mg

\(m=\dfrac{W}{g}\\\\m=\dfrac{980}{9.8}\\\\=100\ kg\)

As mass of an object remains the same everywhere. Weight of the block on Moon is :

W' = mg'

As g'=(g/6)

So,

\(W=100\times \dfrac{g}{6}\\\\=100\times \dfrac{9.8}{6}\\\\=163.33\ N\)

So, the weight of the block on the moon is 163.33 N.

Answer:

According to the Junction rule, in a circuit, the total of the currents in a junction is equal to the sum of currents outside the junction. Kirchhoff’s Voltage Law goes by several names as Kirchhoff’s Second Law and Kirchhoff’s Loop Rule. According to the loop rule, the sum of the voltages around the closed loop is equal to null.

Explanation:

A) The scale reading in Newtons is 735 N.

B)The scale reading compared with his weight is 10 times.

C) Compared to a typical elevator, the acceleration is substantially higher.

A.) The scale reading in Newtons  is calculated using the formula F = ma,

where F is the force, m is the mass of the person (75 kg), and a is the acceleration of the elevator (30 m/s2).

Thus, F = 75 kg x 30 m/s2 = 735 N.

B.) The scale reading compared with  his weight  is calculated by dividing the scale reading (735 N) by the weight of the person (75 kg). Thus, 735 N / 75 kg = 10.

C.) More than in a typical elevator is the acceleration.Elevators usually travel at much lower accelerations than 30 m/s2, making this acceleration unreasonable for this scenario.

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Answer:

It would break because how fast and how tall the fall is because at a certain hight water can act like a solid and break your body/bones or you could die

its a do or die situation

Explanation:

For this problem, lets use the kinetic energy formula

Where m is equal to mass and v is equal to velocity

In our given, we have:

velocity = 60 m/s

kinetic energy = 6,025,000 J

Plug these numbers into the formula to get the mass

m = 3347.222 kg

Answer:its D

Explanation: but i think u meant to put not in the question but if u did mean to put not then its A