Which is expected to happen during El Niño?
A) Drought conditions in Australia
B) Cool temperatures in the equatorial Pacific
C) An increase in the pressure gradient
D) Unusually high fish yields in Peru

Answer:

A. 28 m/s

B. 5.72 s

Explanation:

The following data were obtained from the question:

Maximum height (h) = 40 m

Acceleration due to gravity (g) = 9.8 m/s²

A. Determination of the initial velocity.

Maximum height (h) = 40 m

Acceleration due to gravity (g) = 9.8 m/s²

Velocity at maximum height (v) = 0 m/s

Initial velocity (u) =.?

v² = u² – 2gh (Ball is going against gravity)

0² = u² – (2 × 9.8 × 40)

0 = u² – 784

Collect like terms

0 + 784 = u²

784 = u²

Take the square root of both side

u = √784

u = 28 m/s

Thus, the ball was kicked with a velocity of 28 m/s

B. Determination of the time of flight.

We'll begin by calculating the time taken to reach the maximum height. This can be obtained as follow:

Velocity at maximum height (v) = 0 m/s

Initial velocity (u) = 28 m/s

Time taken to reach the maximum height (t) =?

v = u – gt (Ball is going against gravity)

0 = 28 – 9.8t

Rearrange

0 + 9.8t = 28

9.8t = 28

Divide both side by 9.8

t = 28/9.8

t = 2.86 s

Finally, we shall determine the the time of flight as follow:

Time taken to reach the maximum height (t) = 2.86 s

Time of flight (T) =?

T = 2t

T = 2 × 2.86

T = 5.72 s

Therefore, the time of flight for the ball is 5.72 s

The balloon will rise the most on Wednesday due to high temperature that will increase the thermal energy of the balloon and cause it to rise higher.

The average daily temperature of the different days is calculated as follows;

Monday = (4 + 18 + 22)/3 = 14.67 ⁰C

Tuesday = (6 + 19 + 24)/3 = 16.3 ⁰C

Wednesday = (10 + 20 + 25)/3 = 18.3 ⁰C

The average daily temperature of Wednesday is the greatest.

The balloon will rise the most on Wednesday due to high temperature that will increase the thermal energy of the balloon and cause it to rise higher.

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Law of Reflection :

The law of reflection states that when light rays strike a smooth surface, the angle of reflection equals the angle of incidence, and the incident ray, reflected ray, and normal to the surface all lie in the same plane.

Here, let us consider, the ray A as the normal , as it is perpendicular to the surface of the plane mirror. When the incident ray hits the plane mirror at an angle say, θ  with the normal ( here, incident ray A) , then, θ will be  the angle of reflection.

Now if we consider all the incident rays A, B, C and D. Among them, let the ray C  make an  angle  Θ, with the normal ( here, incident ray A).

Therefore, from the image given, clearly,  θ = Θ, hence Θ is the angle of reflection, thus ray C best represents the reflected ray.

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Answer: it’s A and B

Explanation: everyone else on this post was giving you the wrong answer.

An altering magnetic field will cause an altering electric field, and vice versa. Electromagnetic waves are created from these shifting fields. In contrast to mechanical waves, electromagnetic waves can travel without a medium. Thus option A, B is correct.

The EM wave's magnetic and electric fields are represented by the vectors E and B, respectively. In the case of electromagnetic waves, E and B are always perpendicular to the direction of propagation and to each other.

An oscillating charge generates an oscillating magnetic field, which in turn generates an oscillating electric field in space. As a result, an electromagnetic wave is created by the oscillating electric and magnetic fields that keep regenerating one another.

Therefore, An electric current produces a magnetic field and A moving magnet produces an electric current.

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The weight of an object is the force of gravity on the object and may be defined as the mass times the acceleration of gravity, w = mg. Where W = weight in N. m = mass in kg and g = gravitational field strength in N/kg. g = 10 N/kg.

Proton has positive charge whereas neutron has no charge.

Proton is a type of subatomic particle that has a positive charge whereas Neutron is a type of subatomic particle that has no charge.

An atom that has lost one or more number of electrons is known as anion.

Isotopes is defined as an element that have the same number of protons i.e. atomic number but different numbers of neutrons i.e. mass number.

Electron is located outside the nucleus of an atom.

Fluorine is that atom which has 9 number of protons so its atomic number is 9.

Atomic number is related to the number of particles in the nucleus of an atom because in the nucleus, proton is present which shows the atomic number of an atom.

There are three parts of an atom i.e. proton, electron and neutron.

The size of electron is about 2 × 10⁻¹⁰ cm, The size of proton is about 0.84×10⁻¹³ cm and the size of neutron is about 1.7×10⁻¹⁵ meters

Electron has negative charge, proton has positive charge and neutron has no charge.

Yes, we can tell about the element if we know about the charge and the number of electrons in it because different atoms has particular number of electrons.

The diameter of a nucleus in scientific notation is 1.6 x 10⁻¹⁵.

The mass of hydrogen atom in whole number is 0.00000000000000000000000000167.

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According to the question, If you drop a grand piano down a mine shaft, you would get a flat note.

This humorous response plays on the double meaning of the word "note." In the context of music, a "flat note" refers to a musical tone that is lower in pitch than the corresponding natural note. However, in this context, the phrase "flat note" is used to suggest that the grand piano would be damaged or destroyed upon impact with the ground at the bottom of the mine shaft. It is a lighthearted play on words rather than a literal answer.

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The amount of net force acting on an item is equal to the object's mass times its acceleration. An object is not speeding and is said to be in an equilibrium state if there is zero net force acting on it. Thus, option B is correct.

The total amount of forces exerted on an object is referred to as its net force. The product of the object's mass and its acceleration gives the amount of net force that is acting on the object.

An object is not speeding and is said to be in an equilibrium state if there is zero net force acting on it. The magnitude of a force is its measurement or intensity. The magnitude of the net force is the resultant force, which is the total of all forces acting on a body.

Therefore, The magnitude of the net force acting during interval C is greater than that during A.

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The amount of net force acting on an item is equal to the object's mass times its acceleration. An object is not speeding and is said to be in an equilibrium state if there is zero net force acting on it. Thus, option B is correct.

The total amount of forces exerted on an object is referred to as its net force. The product of the object's mass and its acceleration gives the amount of net force that is acting on the object.

An object is not speeding and is said to be in an equilibrium state if there is zero net force acting on it. The magnitude of a force is its measurement or intensity. The magnitude of the net force is the resultant force, which is the total of all forces acting on a body.

Therefore, The magnitude of the net force acting during interval C is greater than that during A.

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The required current in the windings of the solenoid is approximately 0.457 A. This can be calculated using the formula for the magnetic field inside a solenoid, which is given by B = μ₀ * n * I, where B is the magnetic field, μ₀ is the permeability of free space, n is the number of turns per unit length, and I is the current. Rearranging the formula, we can solve for I: I = B / (μ₀ * n).

Plugging in the given values (B = 1.00 x 10⁻⁴ T, n = 1090 / 0.420 m), along with the value for μ₀, we find that I ≈ 0.457 A.

The magnetic field inside a solenoid depends on the current flowing through the windings and the number of turns per unit length. By rearranging the formula for the magnetic field inside a solenoid and substituting the given values, we can solve for the required current. In this case, the solenoid has 1,090 turns uniformly distributed over a length of 0.420 m, producing a magnetic field of 1.00 x 10⁻⁴ T at its center. By plugging in the values for the magnetic field and the number of turns per unit length into the formula, along with the value for the permeability of free space, we find that a current of approximately 0.457 A is required.

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Answer:

What are your answer choices?

Explanation:

Work is like if you are a police officer you take down enemies. Force is like if you use a negatively charged balloon next to an uncharged piece of paper, they balloon would attract each other.

Hope this helps :D

The nuclear fusion reaction, which occurs in the star's core, is responsible for this. In stars that are more massive than the Sun, heavier elements such as iron and nickel are formed and ejected into the interstellar medium through supernova explosions. However, in the case of a 1-M star, the fusion process only produces helium, carbon, and nitrogen.

The answer is Hydrogen. Explanation: In terms of chemical elements, a single 1-M star will eventually eject significant amounts of hydrogen into the interstellar medium. Once the helium in the core has been exhausted, the outer layers of the star begin to expand and cool. It becomes a red giant as a result of this process. The star's outer layers eventually expand so far that they are lost, forming a planetary nebula. The core of the star, which is now exposed, emits ultraviolet radiation that ionizes the planetary nebula's gases, causing it to glow brightly. The core is now known as a white dwarf, which gradually cools and dims over time.

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A single 1-M star will eventually eject significant amounts of hydrogen, iron, nickel, and other chemical elements into the interstellar medium.

A 1-M star, also known as a solar-mass star, goes through several stages of stellar evolution. Initially, it burns hydrogen in its core, producing helium through nuclear fusion. As the star evolves, it undergoes a series of nuclear reactions, leading to the synthesis of heavier elements. During the red giant phase, the star expands and loses its outer layers, which results in the ejection of significant amounts of hydrogen and other light elements into the interstellar medium.

Additionally, during the late stages of a 1-M star's life, it undergoes a supernova explosion, which releases enormous amounts of energy and leads to the synthesis of even heavier elements like iron and nickel. These elements are synthesized through nuclear reactions occurring during the explosive event. The explosion disperses these newly formed elements into space, enriching the interstellar medium with iron, nickel, and other elements.

Therefore, a single 1-M star will indeed eject significant amounts of hydrogen, iron, nickel, and various other chemical elements into the interstellar medium throughout its evolution and, particularly, during the supernova explosion at the end of it.

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An object's mass, rather than its weight is used to indicate the amount of matter it contains because weight is defined as the amount of force due to an existing field (In most cases, gravitational field) that is experienced by the body. The weight of the same body can be different in different environments it's observed.

However, the mass of the body is the exact measure of the amount of matter contained in a body. Which is constant, regardless of the environment, or conditions the body is observed.

Hence, for real-world calculations and experimentation, the mass of the body is considered to represent the amount of matter it contains rather than its weight.

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At a depth of 10 m, the manatee's neutral buoyancy keeps it at the same level in water as if there were no air inside its lungs. However, because more air is now contained in the manatee's lungs than before it dove, its weight increases by 9.81 kg and therefore it accelerates downwards (due to momentum). This downward acceleration continues until equilibrium is reached and then ceases due to gravity pulling on both objects equally.

As a result, the manatee now becomes negatively buoyant and must rise to compensate.

When something has neutral buoyancy, it is not affected by the weight of anything above or below it.

This means that objects with neutral buoyancy will stay in place regardless of how high or low they are located in a liquid medium.

Examples of things with neutral buoyancy include air balloons and swimming caps.

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Well that happens to me all the time.

Answer:

Whats a rahul?

Explanation:

I'll edit this once I know :)

Answer: its B

Explanation: just took the quiz

The electrical energy consumed is 0.3 kWh.

The electrical energy consumed is determined by taking the product of the electric power and the time of energy usage.

The electrical energy consumed is calculated as follows;

E = Pt

where;

E = 1.2 kW x 0.25 h

E = 0.3 kWh

Thus, the electrical energy consumed is 0.3 kWh.

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In NEC 210.52 (a) (1),  the "6 foot rule" for spacing receptacles applies to all areas of a house, except for bathrooms.

The "6 foot rule" stated in NEC 210.52 (a) (1) requires that there should be no more than 6 feet of unbroken wall space between receptacles in dwelling units. This rule ensures that electrical outlets are conveniently placed throughout a home to provide easy access to power sources. However, bathrooms have different requirements for receptacle spacing due to safety considerations.

NEC 210.52 (d) specifies that at least one receptacle outlet must be installed within 3 feet of the outside edge of each basin or sink in a bathroom. This rule aims to minimize the use of extension cords and potential electrical hazards in wet areas. To summarize, the "6 foot rule" for spacing receptacles applies to all areas of a house, except for bathrooms. Bathrooms have their own specific requirements for receptacle placement to ensure safety in potentially wet environments.

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Answer: Frequency of 1 ÷ 2 = 0.5 Hz.

The energy of an incident photon is E=hf, where h is the Planck constant, and f is the frequency of the electromagnetic radiation. The kinetic energy of the most energetic electron emitted is

Km​ =E−Φ=(hc/λ)−Φ

where Φ is the work function for sodium, and f=c/λ, where λ is the wavelength of the photon. The stopping potential Vstop is related to the maximum kinetic energy by eVstop =

Km,so

eVstop = (hc/λ)−Φ

and

λ= hc / eVstop+Φ = 1240eV⋅nm / 5.0eV+2.2eV = =170nm

Here eVstop =5.0eV and hc=1240eV⋅nm are used.

Note: The cutoff frequency for this problem is

f0 =  hΦ (2.2eV)(1.6×10 −19J/eV) / 6.626×10 −34 J.s = 5.3×10 14Hz

The wavelengths of the visible mild range between 400-700 nanometers, that is among the infrared having longer wavelengths and the ultraviolet having shorter wavelengths. The wavelength of the visible mild suggests that its frequency is about 430-750 terahertz (THz).

The wavelength of light is the space between corresponding factors in two adjoining mild cycles, and the frequency of mild is the quantity of cycles of mild that skip a given factor in a single second.

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40cm³ is  volume of a metal block measures 10cm×2cm×2cm and 5 blocks have the same total volume.

volume=l×b×h

volume=10cm×2cm×2cm= 40cm³

volume=l×b×h

volume= 2cm×2cm×2cm=8cm³

blocks have the same total volume= 40cm³/8cm³= 5

The space occupied inside an object's borders in three dimensions is referred to as its volume. It is sometimes referred to as the object's capacity. Finding an object's volume can help us calculate the quantity needed to fill it, such as the volume of water needed to fill a bottle, aquarium, or water tank.

A sphere is the most basic and typical form of a three-dimensional shape. We see spheres on a regular basis in the form of balls, globes, ornamental lights, oranges, etc.

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The sound level of the hair dryer is approximately 58 dB.

The formula for sound level (in decibels) is:

L = 10 log (I/I₀)

Where L is the sound level, I is the intensity of the sound wave, and I₀ is the reference intensity of 1 pW/m².

Substituting the given values:

L = 10 log (2.25 x 10⁻⁶ / 1 x 10⁻¹²) = 10 log (2.25 x 10⁶) ≈ 58 dB

Therefore, the sound level of the hair dryer is approximately 58 dB when the intensity of a sound wave emitted by a hair dryer is 2.25 µW/m² which is comparable to the noise level of a normal conversation.

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Explanation:

It is given that,

Mass of an object is 13 kg

We need to find the mass of this object on the surface of Jupiter.

The mass of an object is the amount present in it. It it independent of location. It mass remains the same at Jupiter as well. Its does not depend on the gravity on that surface.

Hence, its mass will remain 13 kg on the surface of Jupiter.

Answer:

scattering of light

Explanation:

is the scattering of light as a light beam passes through a colloid. The individual suspension particles scatter and reflect light, making the beam visible. ...

Tech a says that tinted safety glasses can be worn when working outside. tech b says that welding can cause a sunburn. Both technician a and b are correct.

According to Technician a, tinted safety glasses can be worn when working outside, it is true the tinted lenses should be used for outdoor or job specific use only. Tinted lenses will not be worn indoors unless designed for a specific radiant energy hazard, because,

The tints are to protect workers from such hazards as welding, brazing, blast furnaces and other high intensity light sources.

According to Technician b, Welding can cause a sunburn, Hence, it is true because UV radiation in a welding arc will burn unprotected skin just like UV radiation in sunlight.

This hazard is true for direct exposure to UV radiation as well as radiation that is reflected from metal surfaces, walls, and ceilings.

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true. condensation is when gas converts to liquid. the molecules move slower because of a loss of thermal energy, so it forms liquid

The acceleration of a rocket increases as it travels upward from the ground mainly because of two primary factors: the decrease in mass due to fuel consumption and the reduction in air resistance as it gains altitude.

As a rocket burns its fuel, its mass decreases. According to Newton's second law of motion, acceleration is directly proportional to the net force acting on an object and inversely proportional to its mass. Therefore, as the rocket's mass decreases, its acceleration increases, given that the net force remains constant.

Additionally, as the rocket ascends, the air density decreases, leading to a reduction in air resistance. With less air resistance acting against the rocket's motion, the net force acting on it increases, which in turn boosts its acceleration.

In summary, the increasing acceleration of a rocket as it travels upward is primarily due to the decrease in mass resulting from fuel consumption and the reduction in air resistance encountered at higher altitudes.

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The acceleration of a rocket increases as it travels upward from the ground mainly because of the decreasing gravitational force (F_grav) and the absence of air resistance.

The force acting on a rocket can be broken down into two main components: the gravitational force (F_grav) and the thrust force (F_thrust) generated by the rocket engines.

Initially, when the rocket is on the ground, the gravitational force is the dominant force, and the rocket experiences a net force of F_net = F_thrust - F_grav, resulting in an upward acceleration.

As the rocket ascends, the distance between the rocket and the center of the Earth increases, causing a decrease in the gravitational force. The gravitational force is inversely proportional to the square of the distance between the rocket and the center of the Earth (F_grav ∝ 1/r²), where r represents the distance.

Therefore, as the rocket moves upward, the gravitational force decreases, and the net force increases, leading to an increased acceleration.

Additionally, as the rocket leaves the Earth's atmosphere, the effect of air resistance diminishes. Air resistance opposes the motion of the rocket, causing a drag force that reduces the net force. With decreasing air resistance, the net force and, subsequently, the acceleration of the rocket increase further.

Therefore, the increasing acceleration of a rocket as it travels upward is primarily due to the decreasing gravitational force and the diminishing effect of air resistance.

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The force in the rightward direction, fx , should Marcel push is this force leads to counterclockwise torque. Fx = - (w L2 + w L3 - W Lend) / h.

A force in physics is an effect that changes the velocity, or acceleration, of a mass-moving object. It is a vector quantity since it can be a push or a pull and always has magnitude and direction.

Viewing equilibrium of torque:

W Lend + Fx × h = w L2 + wL3

Fx = (w L2 + w L3 - WLend) / h

In the rightward direction, Fx,

Fx = - (w L2 + w L3 - W Lend) / h

Thus, this force leads to counterclockwise torque.

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The given question is incomplete, so the most probable complete question is,

With what force in the rightward direction, fx , should Marcel push? if your expression would give a negative result (using actual values) that just means the force should be toward the left.

The image of the question is attached below.

Apply hooke's law

\(\\ \rm\rightarrowtail F=kx\)

\(\\ \rm\rightarrowtail 1176=k(0.0075)\)

\(\\ \rm\rightarrowtail k=156800N/m\)

#b

We need mass again

\(\\ \rm\rightarrowtail F=kx\)

\(\\ \rm\rightarrowtail mg=kx\)

\(\\ \rm\rightarrowtail 9.8m=156800(0.0048)\)

\(\\ \rm\rightarrowtail 9.8m=752.64\)

\(\\ \rm\rightarrowtail m=76.8kg\)