An arc flash hazard is defined in Article 100 as a source of possible injury or damage to health associated with the release of energy caused by an electric arc. Informational Note No. 1 indicates that the likelihood of occurrence of an arc flash incident increases when energized electrical conductors or circuit parts are exposed or when they are within equipment in a(n)_________.

Answer:

263.152kg

Explanation:

The density of a substance is related to its mass and volume as follows;

density = mass / volume      

mass = density x volume       -------------(i)

The substance in question here is mercury which has;

density = 13.56g/mL = 13.56g/cm³

Since the mercury is going to be put in the cylindrical glass, the volume of the cylindrical glass is going to be equal to the volume of the mercury that will be put.

And we know that the;

volume of a cylinder = πr²h

Where;

π = 3.142

r = bottom radius of the cylinder = 5.75inches

h = height of the cylinder = 0.950ft

For uniformity, let's convert the radius and height of the cylinder to their corresponding values in cm

r  = 5.75 inches = 5.75 x 2.54 cm = 14.605cm

h = 0.950 ft = 0.950 x 30.48 cm = 28.956cm

Therefore, the volume of the cylinder;

v = 3.142 x (14.605cm)² x 28.956cm = 19406.5cm³

v = 19406.5cm³ [This is also the volume of the mercury necessary to fit the cylinder]

Now the following value has been found;

volume = 19406.5cm³

Substitute the values of density and volume into equation (i)  as follows;

mass = 19406.5cm³ x 13.56g/cm³

mass = 263152.14g

Convert the result to kg by dividing by 1000

mass = 263.152kg

Therefore, 263.152kg kilograms of mercury would fit in the cylindrical glass.

Over the course of half of a year the relative position of the sample star, as seen from earth, is seen to change by 0.400''. The parallax angle in this case is: 0.400''

Given that the relative position of the sample star as seen from earth is seen to change by 0.400'' over the course of half of a year. We are to determine the parallax angle in this case. Parallax angle (p) can be defined as the angle between the baseline and the line of sight to the star. It is the angle between two lines drawn from the star to the Earth, separated by six months, and viewed at a right angle to the baseline.

It is measured in seconds of arc (or arcseconds), and it is usually too small to measure directly. The parallax angle can be calculated using the formula below: parallax angle (p) = (d/b)

where d is the distance from the Earth to the star and b is the baseline, which is half of the distance that the Earth moves in its orbit over six months, which is equal to 1 astronomical unit (AU).

Thus, using the given values, we can calculate the parallax angle as follows: \(p = (d/b) = (0.400/1) = 0.400''\)

Thus, the parallax angle, in this case, is 0.400'' (arcseconds). Therefore, the relative position of a star as seen from Earth changes with the change in the Earth's position. The change in position helps to determine the distance from the Earth to the star using the parallax angle.

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The light oscillates electrons which then absorbs some of the energy and reemit it thereby causing a delay.

This is defined as a subatomic particle which has a negative charge. In the glass of water the light oscillates the electrons which absorbs some energy.

The re-emission is what slows light when it passes from air into glass or water.

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Erosion is the moving of soil by water, which represent a geological process able to shape the features of different rock layers.

The geological erosion is the process by which natural forces such as winds and also water may shape a given layer of rock, which occurs at a geological scale because it is a slow phenomenon.

Therefore, with this data, we can see that the erosion process is a slow phenomenon that shape the geographic features of layers of rocks on the Earth surface.

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Moped riding represent angry customers in the model from the lesson.

Moped riding refers to the riding of a special type of small motorcycle, generally having a less stringent licensing requirement than full motorcycles or automobiles.

Generally, the word "moped riding" describes any two-wheeledth with a step-through chassis and footrest platform. These two-wheeled vehicle are usually equipped with bicycle-like pedals that the rider uses to propel the vehicles.

Although motorcycles are usually very harder to learn to ride

The following are other types of riders:

So therefore, moped riding represent angry customers in the model from the lesson.

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Velocity and displacement take direction of motion into account while distance does not take direction of motion into account.

Vector quantities take into account both magnitude and direction of motion while scalar quantities only take the magnitude of motion into account. In describing the motion of an object, we use terms such as; velocity, distance, displacement etc.

Looking at the options provided in the question, displacement and velocity are vectors hence they take the direction of motion into account. Distance is a scalar quantity hence it does not take direction of motion into account.

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The speed of the second bowling ball after collision is 1.55 m/s

Speed can be defined as the ratio of distance to time of a body.

To calculate the speed of the second bowling ball after collision, we use the formula below

Formula:

v = mu/m'................ Equation 1

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the second bowling ball is 1.55 m/s fast.

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Hello!

Answer:

When a gas gets hot it should go up because of the pressure.

Explanation:

Hope this helps!

For the right block to balance the forces and remain steady, it needs to weigh 7.9 kg.

The force is an external agent which is applied to the body or an object to move it or displace it from one position to another position.

When there is no net force acting on the system, the two blocks stay in place. In this instance, the strain in the rope holding the two blocks together balances the pull of gravity on them. The sine of the angles, along with the masses of the blocks, can be used to calculate the tension in the rope.

\(T= (m_1 \times g) \times sin(\theta_1) + (m_2\times g) \times sin(\theta_2)\)

Substituting the known values:

\(T = (10 \times 9.8 )\times sin(23^o) + (m_2\times 9.8 )\times sin(40^o)\)

Solving for m₂:

\(m_2= \dfrac{(T- (10 \times 9.8 )\times sin(23^o)} { (9.8\times sin(40^o))}\)

The mass of the right block must be 7.9 kg for the two blocks to remain stationary.

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The question is -

Two blocks in the Figure below are at rest on frictionless surfaces What must be the mass of the right block so that the two blocks remain stationary? 4.9kg 6.1kg 7.9kg 9.8kg

The magnification is mathematically given as

M= 0.125

Question Parameters:

A spherical glass ornament is 6 cm in diameter.

If an object is placed 10.5 cm away from the ornament, where will its image form

Generally, the mirror equation for ornament  is mathematically given as\

1/q = 2 / r - 1/p

Therefore

1/q = 2 / (-3 cm) - 1/(10.5 cm)

q = -1.31 cm

Therefore, the magnification

M = -q/p

M= -(-1.31 m)/ (10.5 cm)

M= 0.125

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Answer:

Human-driven changes in arrive utilize and arrive cover such as deforestation, urbanization, and shifts in vegetation designs moreover change the climate, coming about in changes to the reflectivity of the Soil surface (albedo), emanations from burning timberlands, urban warm island impacts and changes within the normal water cycle.

The acceleration of the car toward the cliff is 19.81m/s. Other part as well as the explanation of the question is discussed below.

To find the speed at which the car leaves the cliff, first we need to know how long it took to reach the ground. We do this with the equation Where the vertical position at a time , since we are looking for the moment when the car reaches the gound is the initial vertical position, in this case the height of the cliff  is gravitational acceleration: .

So replacing the known values and since we need the time, we clear for it At time  the car  reaches the ground, according to the problem at a horizontal distance from the base of the cliff of 100 to find the velocity we use where  is the horizontal distance at time  (in this case  and  ),  is the initial horizontal distance, we define the cliff as zero in horizontal distance so , and  is the velocity of the car when it rolled of the cliff.

Therefore, The initial velocity (when it rolled of the cliff) is 19.81m/s.

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Answer:

Electron affinity is the energy change that results from adding an electron to a gaseous atom. For example, when a fluorine atom in the gaseous state gains an electron to form F⁻(g), the associated energy change is -328 kJ/mol.

Give brainliest please.

Answer:

Electron affinity is the energy change that results from adding an electron to a gaseous atom.

Sorry I don't know about the second one.

Option A. An electromagnetic wave at very long wavelength (low frequency) best describes a radio wave.

A radio wave is best described as an electromagnetic wave at a very long wavelength or low frequency. It is not a pressure wave. Radio waves are a type of electromagnetic radiation, which also includes other forms such as visible light, infrared, and X-rays. The term "wavelength" refers to the distance between two consecutive points in a wave, such as from one crest to the next. In the case of radio waves, the wavelength is quite long, ranging from several millimeters to hundreds of meters. This long wavelength allows radio waves to travel long distances and pass through obstacles such as buildings and trees. Radio waves are used for various purposes, including communication, broadcasting, and radar systems. For example, when you listen to the radio, the sound is encoded onto a carrier wave, which is a specific radio wave frequency. The receiver then extracts the sound from the carrier wave, allowing you to hear it. Similarly, radar systems use radio waves to detect and track objects like airplanes or weather patterns. To summarize, a radio wave is an electromagnetic wave at a very long wavelength or low frequency. It is not a pressure wave. Radio waves are used for communication, broadcasting, and radar systems due to their ability to travel long distances and pass through obstacles. They play a crucial role in everyday life, allowing us to enjoy wireless communication and entertainment.

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The area of the spill increasing when the circumference of the circle is 100π meters at a rate of 2000 sq. m/sec.

The circumference of a circle or ellipse in geometry is its perimeter. That is, if the circle were opened up and straightened out to a line segment, the circumference would be the length of the arc.

The curve length around any closed figure is more often referred to as the perimeter. The term "circumference" can also refer to the circle's actual location, which corresponds to a disk's edge.

Given parameters:

circumference changing at a rate = 2π dr = 40m/sec.

the circumference of the circle is = 2πr = 100π meters

Hence, the rate of area of the spill increasing = 2πrdr

=  100π meters × 40m/sec/2π

= 2000 sq. m/sec.

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5. All the resistors in this circuit, the 18 Ω resistor included, are in parallel. The voltage drop across each resistor is the same, which is the equivalent to the potential difference of the battery. That is, 36 V [choice K].

6. The ammeter is in series with the branch containing a 12 Ω resistor. Since the voltage drop across this resistor is 36 V, the current in this branch will be I = V/R = (36 V)/(12 Ω) = 3.0 A [choice D].

7. The equivalent resistance of the circuit can be calculated as follows:

1/R = 1/12 + 1/9 + 1/18 = 1/4; thus, R = 4.0 Ω [choice G].

8. Electrical power can be defined as electrical work/time, and electrical work can be given by W = qV. If P = qV/t and q/t = I (charge flowing per unit time is equal to current), then P = VI. From Ohm's law, V = IR, and I = V/R. Substituting V/R for I in the power equation, P = V²/R.

For this circuit, the V = 36 V and R (the equivalent resistance) = 4.0 Ω. So, the power loss in the circuit is P = (36 V)²/(4.0 Ω) = 324 W [choice J].

Jupiter's volume is more than ten times as large as Saturn's volume. This statement is true. Jupiter is the largest planet in our solar system with a volume of about 1,431,281,810,739 km³ while Saturn is the second-largest planet with a volume of about 827,129,915,150 km³.

Jupiter is approximately 11 times larger than Saturn. The two planets belong to the gas giant category, and they share many similarities such as having a large number of moons. Jupiter is famous for its Great Red Spot and powerful magnetic field, while Saturn is well-known for its stunning ring system. Both planets have been the focus of scientific research and exploration, and they continue to fascinate scientists and stargazers alike. In conclusion, Jupiter's volume is more than ten times as large as Saturn's volume.

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Answer:

3.6 m/s

Explanation:

Answer:

a moving car

Explanation:

a body remains in its constant state unless un extenal force is applied.

Answer:

it could be 32 cm/sec the answer

The three particles, with different charges and the same mass and horizontal velocity, enter a region of constant magnetic field. The paths of the particles are shown in Figure 1.

In the given scenario, the path of a charged particle in a magnetic field is determined by the Lorentz force, which is given by the equation F = qvB, where F is the force experienced by the particle, q is its charge, v is its velocity, and B is the magnetic field.

Analyzing the paths of the particles, we can observe the following:

Particle with charge q: The particle follows a curved path with a certain radius determined by the Lorentz force acting on it. The direction of the curvature depends on the sign of the charge and the direction of the magnetic field.

Particle with charge -2q: Since the charge is negative, the particle experiences a force in the opposite direction compared to the particle with charge q. As a result, the particle follows a curved path in the opposite direction.

Neutral particle: A neutral particle has zero net charge and, therefore, does not experience any force in a magnetic field. It continues to move in a straight line with its initial velocity, unaffected by the magnetic field.

In summary, the charged particles with charges q and -2q follow curved paths in opposite directions due to the Lorentz force, while the neutral particle continues to move in a straight line without any deflection in the magnetic field.

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I will go through each statement and provide a true or false answer for an electron.
(a) True

(b) False

(c) True

(d) True

(e) True

(a) True. An electron is a quantum particle that exhibits both particle-like and wave-like behaviour, depending on the experiment being conducted.
(b) False. An electron's rest energy is not zero. It has a rest mass, which means it has a non-zero rest energy according to the equation E=\(mc^2\).
(c) True. An electron carries energy in its motion, both kinetic energy due to its movement and potential energy due to its position in an electric field.
(d) True. An electron carries momentum in its motion, which can be described as the product of its mass and velocity (p=mv) in classical mechanics, or as the product of its wavelength and Planck's constant divided by 2π in quantum mechanics (p=h/(2πλ)).
(e) True. The motion of an electron is described by a wave function, which has a wavelength and satisfies the Schrödinger wave equation. This wave function provides information about the electron's position and momentum in a probabilistic manner.

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Explanation:

Chemical properties

Chemical properties are properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter. They include reactivity, flammability, and the ability to rust. Reactivity is the ability of matter to react chemically with other substances

No it isn't. It's a chemical property.

Answer:

C.

Explanation:

c. the source is written by the person who conducted the experiment. A primary source is an original piece of information created at the time under study. It can be a diary, a letter, a photograph, a recording, or any other type of artifact. It provides firsthand information about an event or topic, and is created by a person who was directly involved or witnessed it.

Answer:

Transverse waves

Explanation:

Transverse waves are a type of wave that oscillates perpendicular to the direction of movement (the direction of propagation). These type of waves are usually represented by the sine or cosine functions due to the up and down oscillation of the waves.

In the case of water waves the thing that oscillates up and down are the water particles affected by the disturbance.

And for the case light waves what oscillates are the electric and magnetic fields, both oscillating perpendicular to the direction of light propagation.

Answer:

D. sympathetic

Explanation:

Answer:

Muscle memory is found in many everyday activities that become automatic and improve with practice, such as riding bicycles, driving motor vehicles, playing ball sports, typing on keyboards, entering PINs, playing musical instruments, poker, martial arts, and dancing.

Explanation: