make x the subject of 3=x/y-z​

Answer:

temperature of about  2.72548 ± 0.00057 K.

Explanation:

The cosmic background radiation is an electromagnetic radiation that remains from an early stage of the universe during the big bang. It was accidentally discovered in 1965 by two American radio astronomers Arno Penzias and Robert Wilson. The radiation was given off before the formation of stars and planets, when the universe was young, denser, hotter, and filled with a uniform glow from a white-hot fog of hydrogen plasma, which cooled down as the universe expanded. From calculations, it was deduced that the radiation had a temperature of 2.72548±0.00057 K, which is close to the temperature of the universe during its formation.

Answer:

measuring

Explanation:

In international development, good governance is a way of measuring how public institutions conduct public affairs and manage public resources in a preferred way. Governance is "the process of decision-making and the process by which decisions are implemented"

Explanation:

way of measuring how public institutions conduct public affairs and manage public resources in a preferred way.

Having students run in place at different speeds to illustrate particle movement in states of matter is an example of kinetic theory of matter.Kinetic theory of matter is the explanation of how particles in matter behave.

The kinetic theory explains that particles in matter are always in constant motion. The movement of these particles depends on the temperature and phase of matter.Particles in a solid state move slower than particles in a liquid state. Also, particles in a liquid state move slower than particles in a gaseous state. The faster the particles are moving, the higher the temperature.This means that having students run in place at different speeds to illustrate particle movement in states of matter is an example of kinetic theory of matter.

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Answer:

earth's crust

meatle

outercore

innercore

Answer:

the crust

the mantle core

the outer core

the inner core

A) The value of AE car's engine is -1210KJ  

The relationship between work, internal energy and heat are  used for first law of thermodynamic. the first law of thermodynamic is applied for the energy principle to the systems where heat ,work are transfer in and out of the systems.

Value of AE for car's engine is -1210KJ

Where AE = +Q+W (or) -Q-w

The work of moving car is 370KJ therefore W =370KJ

The heat of the moving car is 840KJ therefore Q = 840KJ

The AE is negative because absorbs heat and work has done on it and the above values are negative

Then, Q= -840 KJ

          W = -370 KJ

The formula for AE  for negative is AE = -Q-W

AE= -370 - 840

AE= -1210KJ

The correct option is A.

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Answer:

8.79 J

Explanation:

Given that a slinky is traveling down the stairs, like in the video clip below. What is the total KINETIC ENERGY of the slinky at the bottom of the stairs (just before it stops moving) IF the Height of the stairs is 2 meters, the weight of the slinky is 4.41 Newtons, its spring constant is 0.84 N/m, and the distance the slinky is initially stretched (to get it going) is 0.25 meters??

Total energy = mgh

Total energy = 4.41 × 2 = 8.82 J

Elastic potential energy = 1/2 × Ke^2

Elastic potential energy = 1/2 × 0.84 × 0.25^2

Elastic potential energy = 0.02625

Also,

Total energy = P.E + K.E

Substitute them into the formula above

8.82 = 0.02625 + K.E

K.E = 8.82 - 0.02625

K.E = 8.79375

K.E = 8.79 J

Therefore, the KINETIC ENERGY of the slinky at the bottom of the stairs is 8.79 Joules approximately

The total force will be 100 N .

Imagine that If suspend a 1 kilogram load from a spring scale. This has a pulling force of about 100 N. Next, take the weight off the spring scale and fasten it to a wall. Pull the scale until 1 kilogram is displayed. The weight and gravity's downward force of 100 N was the same when it was dangling. Consider what would happen if the end of the thread was linked to one spring scale and a second spring scale was attached to the wall. The spring scale on the other end will display 1 kg when you pull one of them firmly enough to get it to register that weight. They represent equal forces acting in opposition to one another.

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According to special relativity, one can travel at increased rates. However, this is only possible when moving at very high speeds approaching the speed of light. When an object moves at high speeds, the time slows down, and the length of the object appears to be shortened.

These observations are known as time dilation and length contraction. Time dilation refers to the difference in the elapsed time measured by two observers, where one is stationary, and the other is moving at a constant velocity relative to each other. The faster the moving observer, the slower time appears to be for them. Length contraction, on the other hand, refers to the phenomenon where an object appears to be shorter in length when it's moving at high

This effect is more noticeable as the speed of the object approaches the speed of light. As a result, traveling at very high speeds can allow one to cover great distances in less time, which can be used for space exploration and other scientific research. However, it's worth noting that the effects of relativity are only noticeable at very high speeds, which are currently impossible to achieve with our current technology.

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The charge residing on the metal ball is approximately 6.87 × 10⁻⁹ C. The force exerted on the metal ball due to the electric field is approximately 2.58 × 10⁻⁶ N.

a) To find the charge residing on the metal ball, we can use Gauss's Law which states that the flux of the electric field through any closed surface is proportional to the charge enclosed within the surface. For a metal ball of radius R, the electric field just outside the ball is given by:

E = k * Q / R²

where k is the Coulomb constant, Q is the charge on the ball, and R is the radius of the ball.

Substituting the given values, we get:

3.75 × 10² N/C = (9 × 10⁹ N⋅m²/C²) * Q / (3.50 × 10⁻² m)²

Solving for Q, we get:

Q = (3.75 × 10² N/C) * (3.50 × 10⁻² m)² / (9 × 10⁹ N⋅m²/C²)

Q ≈ 6.87 × 10⁻⁹ C

Therefore, the charge residing on the metal ball is approximately 6.87 × 10⁻⁹ C.

b) To find the force exerted on the ball due to the electric field, we can use the formula:

F = Q * E

where Q is the charge on the ball and E is the electric field just outside the ball.

Substituting the given values, we get:

F = (6.87 × 10⁻⁹ C) * (3.75 × 10² N/C)

F ≈ 2.58 × 10⁻⁶ N

Therefore, the force exerted on the metal ball due to the electric field is approximately 2.58 × 10⁻⁶ N.

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Answer:

6097 = x

Explanation:

x = VT + at²/2

x= 2.7 * 35 + 9.8 * (35)²/2

x=6097

Answer:

5km/h

Explanation:

distance divided by total time

The net force on particle q1 to the right is 3.6 x 10⁻⁴ N.

These connections are summarized by Newton's second law of motion. Net Force = Mass Acceleration, or F = m a, can be derived from the following equation for acceleration to solve for net force.

We must get the vector sum of the forces resulting from q2 and q3 in order to determine the net force acting on particle q1:

F_net = F_1,2 + F_1,3

The force between two point charges q1 and q2, which are separated by a distance r, can be calculated using Coulomb's Law as follows:

F = k×(q1 * q2) / r²

Using Coulomb's Law, the force on q1 due to q2 is:

F_1,2 = k * (q1 * q2) / r²

where q1 = 2 x 10⁻⁶ C, q2 = -4 x 10⁻⁶ C, and r = 0.10 m (distance between q1 and q2).

Substituting the values, we get:

F_1,2 = (9.0 x 10⁹ N m² / C²) * (2 x 10⁻⁶ C * -4 x 10⁻⁶₈ C) / (0.10 m)²

F_1,2 = -7.2 x 10⁻⁴ N (repulsive force)

Using Coulomb's Law, the force on q1 due to q3 is:

F_1,3 = k * (q1 * q3) / r²

where q1 = 2 x 10⁻⁶ C, q3 = 3 x 10⁻⁶ C, and r = 0.05 m (distance between q1 and q3).

Substituting the values, we get:

F_1,3 = (9.0 x 10⁹ N m² / C²) * (2 x 10⁻⁶ C * 3 x 10⁻⁶ C) / (0.05 m)²

F_1,3 = 1.08 x 10⁻³ N (attractive force)

the following is the net force acting on particle q1:

F_net = F_1,2 + F_1,3

F_net = (-7.2 x 10⁻⁴ N) + (1.08 x 10⁻³ N)

F_net = 3.6 x 10⁻⁴ N (to the right)

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Answer:

velocity

Explanation:

velocity includes the direction taken by a person or object

The universe was created due to an explosion that occured in space and that the universe is expanding but still maintains an average density that's constant.

The Big Bang Theory proposes that a space-based explosion led to the creation of the universe. The space expanded because of the extraordinarily high temperature and density. The elements were then created after the cosmos cooled.

According to the Big Bang Theory, the universe was created by a tremendous explosion that took place billions of years ago. The stars and galaxies that exist in our universe were formed when matter was drawn together by gravity.

The steady state theory is a description of the idea that although the cosmos is expanding, its average density remains constant.

The steady state theory claims that even though the cosmos is expanding, its appearance remains unchanged.

In conclusion, the steady state hypothesis and the big bang theory both describe how the universe came into being.

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Answer: Choice A, that X and Y are both positive

Explanation: positive charges are attracted to negative charges, so for their electric fields, positive charges point outward while negative charges point inward. In this model, it shows that both X and Y are pointing outward, hence they both have to have positive charges

Running out of fuel in aircraft is rare due to safety measures, but possible reasons include fuel miscalculation, system failures, communication issues, distractions, decision errors, or unforeseen circumstances. Crews are extensively trained in fuel management to prevent incidents.

Allowing an aircraft to run out of fuel can have serious consequences and is a rare occurrence, as multiple safety measures are in place to prevent such incidents.

However, if we assume a hypothetical scenario where the cockpit crew allows the plane to run out of fuel, some possible reasons could include:

1. Fuel miscalculation or mismanagement: The crew may have made errors in calculating the fuel required for the flight, leading to insufficient fuel onboard. This could occur due to incorrect assumptions, inaccurate data, or mistakes in fuel planning.

2. Systems failure or malfunction: There could have been an unexpected failure or malfunction in the fuel monitoring or fuel transfer systems, leading to inaccurate readings or an inability to access fuel reserves.

3. Communication breakdown: Ineffective communication between the cockpit crew and ground personnel responsible for fueling could result in inadequate fueling or miscommunication regarding fuel availability.

4. Distractions or task overload: The cockpit crew may have been preoccupied with other tasks, emergencies, or critical situations, inadvertently neglecting to monitor or manage the fuel levels adequately.

5. Decision-making errors: The crew may have made poor decisions or failed to recognize the gravity of the situation, underestimating the fuel remaining or overestimating the distance to the next available fueling option.

6. External factors: Unforeseen circumstances like air traffic control rerouting, unexpected weather conditions, or diversions due to emergencies might have played a role in exhausting the fuel supply.

It's important to note that running out of fuel is a severe breach of flight safety protocols, and professional cockpit crews are trained extensively to prevent such incidents through rigorous fuel management procedures and adherence to regulatory guidelines.

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The arrangement in fig 3.2 balance because, the two conditions of equilibrium for a system under the action of coplanar forces is satisfied.

The arrangement in fig 3.2 balances, because the conditions for equilibrium was met.

Moment is the product of force of a body and it perpendicular distance.

The conditions of equilibrium for a body acting under coplanar forces are

(1) The sum of upward force must be equal to me sum of downward force.

(2) The sun of clockwise moment must be equal to the sum of anti-clock wise moment.

From the diagram,

Hence, the arrangement in fig 3.2 balance because, the two conditions of equilibrium for a system under the action of coplanar forces is satisficed.

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In order to be classified as a hurricane, sustained wind velocity must exceed 160 km/h (100 mph). So, option d) is correct.

A tropical cyclone is a cyclonic rotating weather system with organized thunderstorms, but without a front (a boundary separating two air masses of different densities). Tropical cyclones with maximum sustained wind speeds less than 39 miles per hour (mph) are known as tropical cyclones. Those with maximum sustained winds of 39 miles per hour or more are called tropical storms. Hurricanes form in the Atlantic Basin, which includes the Atlantic Ocean, the Caribbean Sea, the Gulf of Mexico, the eastern North Pacific, and rarely the central North Pacific. A six-yearly rotating list of names, updated and maintained by the World Meteorological Organization, is used to identify these storms.

The prevailing winds that surround a hurricane, also known as the ambient wind field, guide the hurricane in its path. Hurricanes propagate in the direction of this wind field, which also affects the propagation velocity of the system.

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The rationale behind the construction of phylogenetic trees is based on the principle of common descent and the evolutionary relationships between organisms.

Phylogenetic trees represent the evolutionary history and genetic relatedness among species or groups of organisms. They are constructed using various methods, including molecular data analysis, morphological traits, and fossil records.

By analyzing shared ancestral and derived characteristics, genetic similarities, and branching patterns, scientists can infer the evolutionary relationships and ancestry of different organisms.

Phylogenetic trees provide a visual representation of the evolutionary tree of life, helping us understand the evolutionary connections, diversification, and evolutionary history of species.

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The diffraction pattern of the hair appears in the horizontal direction that it does because the diffraction pattern of the hair appears in the horizontal direction due to the bending and spreading of light waves around the hair.

1. When light encounters an obstacle, such as a hair, diffraction occurs. Diffraction is the bending and spreading of light waves around the obstacle.
2. The hair acts as a single slit, allowing light to pass through the narrow gap around it.
3. As the light waves pass through this gap, they interfere with each other, causing constructive and destructive interference.
4. This interference results in a diffraction pattern that appears in the horizontal direction, which is perpendicular to the direction of the hair.
5. The pattern is characterized by a series of bright and dark bands, with the bright bands representing areas of constructive interference and the dark bands representing areas of destructive interference.
In conclusion, the diffraction pattern of the hair appears in the horizontal direction due to the bending and spreading of light waves around the hair, which causes interference patterns to form perpendicular to the direction of the hair.

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The magnetizing current of a transformer does not lie in-phase with the applied voltage. It lags the applied voltage by a small angle.

Magnetizing current

No, the magnetizing current of a transformer does not lie in-phase with the applied voltage. It is slightly lagging behind the applied voltage by a small angle. This is because the transformer core has a small amount of resistance, which causes a small voltage drop across the core. This voltage drop is in-phase with the current, and it causes the current to lag behind the voltage by a small angle.

When the transformer core is saturated, the magnetizing current increases sharply. This is because the core becomes increasingly difficult to magnetize as it approaches saturation. The increased magnetizing current causes the transformer to lose efficiency and to produce more heat.

Inrush current

The inrush current of a transformer can cause a number of problems, including:

Overloading the transformer

Tripping the transformer's protective devices

Damaging the transformer's windings

Starting a fire

Even at no-load, a transformer draws a small amount of current from the mains. This current is called the magnetizing current. The magnetizing current is required to create the magnetic field in the transformer core. The magnetic field is necessary to induce the voltage in the secondary winding.

Exciting resistance and exciting reactance

The exciting resistance of a transformer is the resistance of the transformer core. The exciting reactance of a transformer is the reactance of the transformer's windings. The exciting resistance and exciting reactance together form the transformer's impedance.

Transformers are not designed to operate in the saturated region. The saturated region is a region where the core is unable to produce any additional magnetic flux. This can cause a number of problems, including:

Increased magnetizing current

Decreased efficiency

Increased heat generation

Transformers are designed to operate in the linear region, where the core is able to produce a linear relationship between the applied voltage and the induced voltage. This allows the transformer to operate efficiently and to produce the desired amount of power

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Answer: 0.3

Explanation: Jusy took it and got a 100

Answer: 0.3

Explanation: This is right trust me I answered this and it was correct!!

Answer:

3.2 hours

Explanation:

96÷30=3.2

so it should take 3.2 hours

The net force on a moving object suddenly becomes zero and remains zero then the object will be in rest according to Newton's first law of motion.

The force on an object is equal to its mass times of its acceleration i.e.

F =ma

where , m is the mass , F is the force and a is the acceleration of the object. Its unit is Newton (N).

Newton's first law can be stated as , when an object at rest remains at rest, or if in motion, remains in motion at a constant velocity unless acted on by a net external force. A reaction force is a force that acts in the opposite direction to an action force.

Velocity of an object can be said as, the rate of change of displacement with respect to time of an object . Its unit is m/s and it is a vector quantity.

V = Δx/Δt

In here , V is velocity ,  Δx is change in displacement and Δt is change in time of an object.

In hence ,when the net force becomes zero F=0 the velocity of the object will be zero , then the object will remain at rest.

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As the temperature of a sample of water approaches 0 K, particles of water slow down and form a solid. Option B

This process is known as solidifying or hardening, and it happens when the temperature of a substance is brought down to the point where the warm thermal energy of the particles isn't sufficient to keep them in a fluid state.

At this point, the particles start to bond together to create a crystalline strong, which is what we commonly allude to as ice.

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Answer:

To answer your question:

a) The formula to calculate the number of wavelengths within a laser pulse is:

number of wavelengths = pulse duration / wavelength

Plugging in the values given in the question, we get:

number of wavelengths = 38 ps / 1062 nm

Converting picoseconds to seconds and nanometers to meters, we get:

number of wavelengths = 38 x 10^-12 s / 1062 x 10^-9 m

number of wavelengths = 0.0358

Therefore, there are approximately 0.0358 wavelengths within the laser pulse.

b) To fit only one wavelength, the pulse duration would need to be equal to the wavelength. The formula to calculate the pulse duration is:

pulse duration = wavelength

Plugging in the value given in the question, we get:

pulse duration = 1062 nm

Converting nanometers to picoseconds using the speed of light ©, we get:

pulse duration = wavelength / c

pulse duration = 1062 x 10^-9 m / 3 x 10^8 m/s

pulse duration = 3.54 x 10^-12 s

Therefore, the pulse would need to be approximately 3.54 ps long to fit only one wavelength.

I hope this helps

Explanation:

\(workdone = force \times distance \\ = 500 \times 100 \\ = 50000 \: J\)

Answer:

\(975.1\ \text{m/s}\) and \(1392.56\ \text{m/s}\)

\(276830.96\ \text{m}\)

284 seconds

Explanation:

(a) \(u=\text{Initial velocity}=1700\ \text{m/s}\)

\(\theta\) = Angle of inclination = \(55^{\circ}\)

Horizontal velocity is given by

\(u_x=u\cos\theta\\\Rightarrow u_x=1700\times \cos55^{\circ}\\\Rightarrow u_x=975.1\ \text{m/s}\)

Vertical velocity is given by

\(u_y=u\sin\theta\\\Rightarrow u_x=1700\times \sin55^{\circ}\\\Rightarrow u_x=1392.56\ \text{m/s}\)

The horizontal and vertical velocities are \(975.1\ \text{m/s}\) and \(1392.56\ \text{m/s}\) respectively.

(b) Range of projectile is given by

\(R=\dfrac{u^2\sin2\theta}{g}\\\Rightarrow R=\dfrac{1700^2\sin(2\times 55^{\circ})}{9.81}\\\Rightarrow R=276830.96\ \text{m}\)

The shell hit the ground \(276830.96\ \text{m}\) from the launch position.

(c) Time of flight is given by

\(t=\dfrac{2u\sin\theta}{g}\\\Rightarrow t=\dfrac{2\times 1700\times \sin55^{\circ}}{9.81}\\\Rightarrow t=284\ \text{s}\)

The shell was in the air for 284 seconds.