Iron has a work function of 4.7 eV .
what is the longest wavelength of light that will release an electron from a iron surface?

To calculate the temperature of the air after it has doubled in volume, we need to use the Ideal Gas Law which states that PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the gas constant, and T is temperature. Since we know that the pressure is constant and the volume has doubled.

(P)(2V) = (n)(R)(T2) where T2 is the temperature after the air has doubled in volume. We can simplify this equation by dividing both sides by PV and using the fact that PV = nRT, which gives: 2 = (T2 / T) where T is the initial temperature of the air. Solving for T2, we get: T2 = 2T Substituting the initial temperature T = 300 K, we get: T2 = 2(300 K) = 600 K To calculate the temperature of the air after it has doubled in volume, we will use the following ideal gas law formula:
PV = nRT

where P is pressure, V is volume, n is the number of moles of gas, R is the ideal gas constant, and T is temperature. Since the pressure is constant, we can set up the following proportion: V1/T1 = V2/T Given the initial conditions: V1 = 1 L (initial volume) T1 = 300 K (initial temperature) V2 = 2 L (final volume, since the volume doubled) We want to find T2 (the final temperature). To do this, plug the values into the proportion: (1 L)/(300 K) = (2 L)/T2 Now, solve for T2: T2 = (2 L) * (300 K) / (1 L) T2 = 600 K The temperature of the air after it has doubled in volume is 600 K.

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The temperature of the air after it has doubled in volume is 600 K.

Given that air is an ideal gas, we can use the ideal gas law, which states that PV = nRT, where P is pressure, V is volume, n is the amount of gas, R is the ideal gas constant, and T is temperature. In this case, we have the initial state and final state of the gas, and we want to calculate the final temperature.
Initial state:
P1 = 1 atm
V1 = 1 L
T1 = 300 K
Final state:
P2 = 1 atm (constant pressure)
V2 = 2 L (doubled volume)
T2 = ? (we need to find this)
Since the pressure is constant, we can set up a ratio using the initial and final states:
(V1/T1) = (V2/T2)
Plugging in the known values:
(1 L / 300 K) = (2 L / T2)
Now we can solve for T2:
T2 = (2 L * 300 K) / 1 L
T2 = 600 K

So, the temperature of the air after it has doubled in volume is 600 K.

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A leftward force of 50 N is applied to an 8 kg object to move it across a rough surface with a leftward acceleration of 5 \(m/s^{2}\) , its

gravitational force = 78.4 N

normal force = 78.4 N

frictional force = 10 N rightward

net force =  40 N leftward

coefficient of friction = 0.128

given

force = 50 N

mass = 8 kg

acceleration = 5 \(m/s^{2}\)

gravitational force = mg = 8 * 9.8 = 78.4 N

normal force = mg = 78.4 N ( as N= mg )

- F (applied) + frictional force  = - F (net )

F (applied)  - fr = F (net )

50 - fr = mass * acceleration

50 - fr = 8 * 5

fr = 10 N

Fnet = ma = 8 * (-5) = -40 N

Frictional force = mu * N

10 = mu * 78.4

mu (coefficient of friction ) = 10 / 78.4 = 0.128

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Answer:

the picture is so blured can you type it in comment i will wait:(

A dirty headlight lens headlight lens can cut the amount of light it emits by 90%.

A dirty headlight lens has the ability to reduce the amount of light emitted by the lens by 90%. A plastic lens is commonly used to cover the headlight bulbs. The primary function of a plastic lens is to keep these bulbs from becoming blurry or clouded.

It was demonstrated that dirt is accumulated even when the road appears to be in good condition, and that even a little amount of dirt produces increased glare from low beam and decreased vision from high beam. Visibility is always lost when light levels are reduced by more than 20%.

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Answer:

There is a distinct juvenile form many animals undergo before metamorphosis into adults. The larva's appearance is generally very different from the adult form including different unique structures and organs that do not occur in the adult form. So, yes the Larvae baby is very different from the adult animal.

Explanation:

If the distance between them were to decrease by half, the force between them will be 4 times larger than with the initial separation (Option B)

The following data were obtained from the question:

The final force between the objects when their initial distance is decreased by 1/2 (i.e 0.5) can be obtained as follow:

From Newton's law of universal gravity,

F = GM₁M₂ / r²

Cross multiply

Fr² = GM₁M₂

GM₁M₂ = constant

F₁r₁² = F₂r₂²

With the above formula, we can obtain the final force as follow:

F₁r₁² = F₂r₂²

F × r² = F₂ × (0.5r)²

Fr² = F₂ × 0.25r²

Divide both side by 0.25r²

F₂ = Fr² / 0.25r²

F₂ = 4F

Thus, the force will be 4 times larger than the initial force.

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Detailed observations of the structure of the Milky Way are difficult because our position within the galaxy obstructs our view of certain regions, such as the galactic center. Additionally, the presence of interstellar dust clouds and the limitations of current technology make it challenging to collect comprehensive data on every star and structure within the Milky Way.

Detailed observations of the structure of the Milky Way are difficult because:

1. Our solar system is located within the Milky Way, which makes it challenging to get a comprehensive view of the entire galaxy.
2. The presence of dust and gas in the Milky Way obstructs our view, causing difficulties in observing distant stars and structures.
3. The sheer size of the Milky Way, with its billions of stars, makes it difficult to study its overall structure in detail.

These factors contribute to the challenges in making detailed observations of the Milky Way's structure.

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The labels A and B in the triangle's supplied picture stand for the transitions from a gas to a liquid and a gas to a solid, respectively.

Arrow A, which descends one side of the triangle from the top labelled "gas," symbolises condensation, the transformation of a gas into a liquid.

When a gas loses energy and changes into a liquid state, condensation takes place.

The transition from a gas to a solid is shown by arrow B, which also descends from the top and is labelled "gas" but is located on a different side of the triangle. Deposition is the term for this alteration. When a gas loses energy, it decomposes into a solid without changing to a liquid state, which is known as deposition.

Arrow C travels horizontally from the point designated "liquid" on the bottom of the triangle to the place designated "solid." This illustrates freezing, the transition from a liquid to a solid state. When a liquid loses energy, it freezes and changes from a liquid state to a solid state.

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Answer:

on the body of the container of the chemical and it also on the shelf where the chemical is kept in the laboratory.

Explanation:

The information on the chemical and physical properties of a specific chemical should  be located on the body of the container of the chemical. when storing chemicals in a laboratory the properties, both chemical and physical properties of the chemical should be written out and pasted on the body of the container that contains the chemicals.and also o the shelf where the chemical is kept in the laboratory or workplace .

Answer:

My teacher said 36m when I asked her

Explanation:

HOPE THIS HELPS!!

The coefficient of kinetic friction between the cars and the road is 0.648.

Let's first calculate the initial momentum of the system before the collision. The momentum is given by p = mv, where m is the mass and v is the velocity. Initially, the 2360 kg car is traveling at 10.9 m/s and the 2610 kg car is at rest, so the initial momentum of the system is:

p = (2360 kg)(10.9 m/s) + 0 = 25724 kg m/s

After the collision, the two cars stick together and move a distance of 4.39 m before friction causes them to stop. We can use the conservation of momentum to find their final velocity. Since the two cars stick together, their final velocity is the same:

25724 kg m/s = (2360 kg + 2610 kg) v

v = 6.08 m/s

The change in velocity is 10.9 m/s - 6.08 m/s = 4.82 m/s. The cars move 4.39 m before stopping, so we can use the equation of motion to find their acceleration:

v² = u²+ 2as

where u is the initial velocity, v is the final velocity, a is the acceleration, and s is the distance traveled.

Plugging in the values, we get:

0 = 4.82² + 2a(4.39)

a = -7.90

This is the acceleration due to the friction between the cars and the road. We can use this to find the force of friction:

F = ma = (2360 kg + 2610 kg)(-7.90) = -44780 N

The negative sign indicates that the force of friction is in the opposite direction of the motion.

The force of friction is also related to the normal force and the coefficient of kinetic friction by the equation F = μkN, where μk is the coefficient of kinetic friction and N is the normal force. The normal force is the force exerted by the road on the cars to support their weight. Since the cars are on a level surface, the normal force is equal to the weight of the cars:

N = (2360 kg + 2610 kg)(9.81) = 49090.8 N

Plugging in the values, we get:

-44780 N = μk(49090.8 N)

μk = -44780 N / 49090.8 N = 0.648

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Pilots can prevent landing at the wrong airport or on the wrong runway by adhering to established procedures and employing various navigational aids.

Pilots can employ several measures to prevent landing at the wrong airport or on the wrong runway. Firstly, they should carefully review and follow established procedures provided by air traffic control (ATC) and the airport authority. This includes verifying the assigned runway and using the correct approach and landing charts. Secondly, pilots should make use of navigational aids such as instrument landing systems (ILS), global positioning systems (GPS), and visual aids like runway markings and signage.

These aids help pilots to accurately identify their intended destination and runway. Maintaining situational awareness throughout the flight is crucial, and pilots should cross-reference visual cues with navigational aids to ensure they are on the correct path. In cases of uncertainty or confusion, pilots should communicate with ATC to clarify any discrepancies or seek guidance. By diligently following procedures and utilizing navigational aids, pilots can significantly reduce the risk of landing at the wrong airport or on the wrong runway.

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No, the object's displacement and distance traveled will be equal; however, because the object's initial position is unknown, the object's position may differ from its displacement and distance traveled.

Because the initial position is not provided, we cannot assert that the displacement or distance equals the position. We might have arrived at a different conclusion if the starting point had been zero, because the distance from zero equals the position.

What precisely do you mean by position, displacement, and distance?

The location of an object (whether a person, a ball, or a particle) at a given point in time is referred to as its position. The displacement of an object is the difference in its position from one time to the next. Distance is the total amount the object has traveled in a certain period of time.

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Answer:

1–

Explanation:

The fluorine is the element with biggest electronegativity in the periodic table, so it usually always take an electron and gets charge 1–

The valence electrons that Fluorine possesses is 7. Then, the charge of its ion would most probably be:

C). 1–

Fluorine is the element having F as its symbol and 9 as its atomic number(9 protons).

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The Weight  is a vector whose magnitude is the product of the mass m of the object and the magnitude of the local gravitational acceleration. Its always directed toward  the center of the Earth.

Projectile motion does not accelerate horizontally if airspeed is disregarded. Thus, the particle is updated horizontally at a constant speed.

What can be said regarding a projectile's airborne acceleration?

A projectile only experiences the acceleration caused by gravity as it falls.  Vertical acceleration is always equal to 9.8 m s 2 9.8 dfrac m s 2 9.

If we don't account for air resistance, what would be the projectile's acceleration?

When air resistance is disregarded, all objects fall with the same downward acceleration of g = 9.8 m/s2. Because the ball is falling faster, the distance it travels each second increases.

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Explanation:

I think it is third law.

Answer:

C) Third law

Explanation:

:)

The manager should get in touch with the local regulatory authorities before using if a broken water main has made the water in a business appear brown.

The amniotic sac, a fluid-filled membranous sac, surrounds and protects your baby during pregnancy. Your membranes will typically burst, commonly known as your water breaking, during the start or during labor. If you

If your baby is premature, they can survive for weeks with the right monitoring and care, usually inside a hospital setting. Current research indicates that it might be safe to wait 48 hours (and occasionally longer) for labor to start naturally when your baby is now at least 37 weeks old.

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The height of the absorption packed tower that should be used is  1.84m.

The density is the ratio of mass and volume of the matter.

The mole fraction of pollutant in gas phase at inlet, y₁ = (ρCl₂/GMW of Cl₂)/(ρair/ GMW of air)

GMW of air is 28.97, GMW of Cl₂ is 70.096, density of air is 1.205 kg/m³ and density of Cl₂ is 10mg/m³ x 10⁻⁶ kg/mg

Substitute the value, we get the mole fraction at inlet,

y₁ =3.391 x 10⁻⁶

The mole fraction at outlet where density of chlorine is 2.95 x 10⁻⁶ kg/m³ is

y₂ =1 x 10⁻⁶

Value of A =m Qg/Ql

Qg  is the gas flow rate and Ql is the liquid flow rate, m is Henry's constant

A = 6.82 x (3/28.97GMW of air) / (15/18.05GMW of H₂O)

A=0.848203

Number of gas transfer unit, Nog ={ ln[y₁ -mx₂/y₂ -mx₂](1-A) +A} / (1-A)

Substitute the values, we get

Nog = 2.039

The height of an individual gas transfer unit, Hog = Hg +A.Hl

Substitute Hg =0.662 and Hl = 0.285. we get

Hog =0.9037m

Height of packed tower, Z = Hog x Nog

Substitute the value, we get

Z= 1.84m

Thus, the height of the absorption packed tower is 1.84m.

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Answer:

IMA = 2.5 metres

EFFICIENCY = 80%

Explanation:

The AMA of a machine is referred to as the Actual Mechanical Advantage of a machine, calculated as the ratio of the output to the input force.

The Ideal Mechanical Advantage is the ratio of the input distance to the output distance.

From the diagram, the input distance which is also the distance moved by effort  = 5metres

The load distance (output distance) = 2 metres

IMA = INPUT DISTANCE / OUTPUT DISTANCE

IMA = 5metres / 2 metres = 2.5 meters

Efficiency is the ratio of AMA TO IMA

AMA = 2, IMA = 2.5

EFFICIENCY = AMA / IMA

EFFICIENCY = (2 / 2.5) × 100%= 0.8 × 100%

EFFICIENCY = 80%

The mass of the displaced water is equal to the mass of the iceberg, which is 30 kg.

The mass of the displaced water by a piece of 30 cm thick iceberg with its surface area 1000 sq cm when it floats on water can be calculated as follows;

1: Calculate the volume of the iceberg

The volume of the iceberg can be calculated as follows;

V = l × b × h

where l is the length, b is the breadth, and h is the height.

V = 1000 × 30V = 30,000 cm³

2: Calculate the mass of the iceberg

Mass = Volume × Density = V × D

For water, the density is 1 g/cm³= 30,000 × 1= 30,000 g or 30 kg

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The base unit of length in the international system of units is the: meter (m)

The meter, ( symbol: m ) is the SI unit of length. It is derived by taking the fixed numerical value of the speed of light in vacuum c to be 299 792 458 when expressed in the unit m s-1

The SI base units are the standard units of measurement defined which is defined by the International System of Units (SI) for the seven base quantities of what is now known as the International System of quantities:

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If higher-frequency standing wave in the cavity produces nodal planes with a spacing of 1.25 cm, the distance L between the walls of the cavity is 7.5cm.

The general formula for both ends closed is (n+1) λ/2

Let's say for n, \(\frac{\pi }{2} n = 1.5 = \pi = 3cm\)

for (n+1), λ(n+1)/2 = 1.25 = λ(n+1) = 2.5cm

∴ (n+1) (1.5) = (n+2)(1.25) = n = 4

∴  L = (4+1)(3/2) = L = 7.5cm.  

Electromagnetic waves, or EM waves, are waves produced by oscillations between electric and magnetic fields. In other words, EM waves consist of oscillating magnetic and electric fields. Gamma rays have the highest frequencies in the electromagnetic spectrum.

Most sunrise alarm clocks are yellow to simulate the brightness of the sun. This energizing color is the color your body naturally associates with the morning. Colors like purple and red are often used for simulating the sunset and may be more conducive to falling asleep.

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Answer:

it is increasing

Explanation:

gpe is highest at highest point of travel

Answer:

13.76 Joules

Explanation:

The SI units for joules are defined to be kilogram*meters per second. Therefore, we must turn the grams to kilograms by dividing the answer by 1,000. This is due to 1,000 grams being in a single kilogram. Kinetic energy is defined to be:

\(KE=\frac{1}{2} mv^2\)

Therefore:

\(KE=\frac{1}{2} (0.43kg)(8m/s)^2=13.76J\)

Answer:

This is because the 11 positive protons and 10 negative electrons end up with an overall charge of +1.

Explanation:

Answer:

One electron in it's outer shell

Patients with anterograde amnesia were taught to solve the Tower of Hanoi problem. It was later found that they "didn't remember solving the problem but could do it again" which is option d.

Anterograde amnesia is a type of amnesia that affects the ability to generate new memories following the onset of the condition. This condition is generally caused by damage to the hippocampus or adjacent structures, and it typically affects a person's ability to learn and remember new information.

Therefore, patients with anterograde amnesia are unable to form new memories and often rely on implicit memory systems to perform specific tasks over time.

Thus the correct answer is option d.

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Answer:

no

Explanation:

because The properties of matter include any traits that can be measured,

Physical properties can be observed or measured.