Four students made a graphic organizer describing the parts of the atom. which table best describes the parts of the atom? a 3 column table with 3 rows. the first column is labeled particle with entries proton, electron, neutron. the second column is labeled charge with entries positive, 0, negative. the last column is labeled location with entries outside nucleus, outside nucleus, inside nucleus. a 3 column table with 3 rows. the first column is labeled particle with entries proton, electron, neutron. the second column is labeled charge with entries negative, 0, negative. the last column is labeled location with entries inside nucleus, outside nucleus, inside nucleus. a 3 column table with 3 rows. the first column is labeled particle with entries proton, electron, neutron. the second column is labeled charge with entries 0, negative, positive. the last column is labeled location with entries outside nucleus, inside nucleus, inside nucleus. a 3 column table with 3 rows. the first column is labeled particle with entries proton, electron, neutron. the second column is labeled charge with entries positive, negative, 0. the last column is labeled location with entries inside nucleus, outside nucleus, inside nucleus.

The force acting on the 12 kg mass would be 11 N.

To solve this problem, we need to use the work-energy principle, which states that the work done by a force on an object is equal to the change in the object's kinetic energy.

First, we need to calculate the initial and final kinetic energy of the 12 kg mass.

The initial kinetic energy is given by:

K₁ = (1/2) * m * v₁²

= (1/2) * 12 kg * (11 m/s)²

= 726 J

The final kinetic energy is given by:

K₂ = (1/2) * m * v₂²

= (1/2) * 12 kg * (26 m/s)²

= 936 J

The change in kinetic energy is:

ΔK = K₂ - K₁

= 936 J - 726 J

= 210 J

Next, we need to calculate the work done by the unknown force. We can do this by using the formula:

W = F * d * cosθ

where W is the work done, F is the force, d is the displacement, and θ is the angle between the force and displacement vectors.

In this case, the displacement is 22 meters, and the angle θ is 30 degrees. So we have:

W = F * d * cosθ

= F * 22 m * cos(30°)

= 19.1 F

Finally, we can use the work-energy principle to solve for the unknown force:

W = ΔK

19.1 F = 210 J

F = 11 N

Therefore, the force acting on the 12 kg mass is 11 N.

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(a) To find the kinetic energy of the fastest ejected electrons, we need to use the equation:

KE = hf - W

where KE is the kinetic energy of the electron, h is Planck's constant (6.626 x 10^-34 J.s), f is the frequency of the light, and W is the work function of aluminum (4.2 eV converted to joules is 6.73 x 10^-19 J).

First, we need to find the frequency of the light using the formula:

c = fλ

where c is the speed of light (3 x 10^8 m/s) and λ is the wavelength of the light (200 nm or 2 x 10^-7 m).

Rearranging the formula, we get:

f = c/λ

f = (3 x 10^8)/(2 x 10^-7)

f = 1.5 x 10^15 Hz

Now we can plug in the values and solve for KE:

KE = hf - W

KE = (6.626 x 10^-34)(1.5 x 10^15) - 6.73 x 10^-19

KE = 9.92 x 10^-19 J

Converting this to electron volts (eV), we get:

KE = (9.92 x 10^-19)/(1.602 x 10^-19)

KE = 6.20 eV

Therefore, the kinetic energy of the fastest ejected electrons is 6.20 eV.

(b) To find the kinetic energy of the slowest ejected electrons, we can use the same equation as in part (a), but with a frequency equal to the cutoff frequency for aluminum. This is because electrons with less kinetic energy than the work function cannot be ejected.

(c) The stopping potential is the potential difference between the metal surface and the point where the kinetic energy of the fastest electrons is reduced to zero. We can find this using the equation:

eV_stop = KE_max

where e is the elementary charge (1.602 x 10^-19 C).

Plugging in the values from part (a), we get:

V_stop = KE_max/e

V_stop = 6.20/1.602

V_stop = 3.87 V

Therefore, the stopping potential is 3.87 V.

(d) The cutoff wavelength for aluminum can be found using the formula:

λ_cutoff = hc/W

where W is the work function of aluminum.

Plugging in the values, we get:

λ_cutoff = hc/W

λ_cutoff = [(6.626 x 10^-34)(3 x 10^8)]/6.73 x 10^-19

λ_cutoff = 2.92 x 10^-7 m

Converting this to nanometers, we get:

λ_cutoff = 292 nm

Therefore, the cutoff wavelength for aluminum is 292 nm.

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Answer:

Periods are horizontal rows (across) the periodic table, while groups are vertical columns (down) the table. Atomic number increases as you move down a group or across a period. Beside above, what do columns mean in the periodic table? The periodic table also has a special name for its vertical columns.

Explanation:

The displacement of Susie is the total distance and direction she has traveled. In this case, Susie has traveled a total of 52 meters in a northwest direction.

Displacement is a vector quantity that is defined as the change in position of an object from its initial position. It measures the distance and direction of an object’s movement from its starting point to its final point. Displacement is a common concept used in physics and can be expressed mathematically as the difference between the initial and final position of an object.

To calculate her displacement, we can use the Pythagorean Theorem. Susie walked south for 12 meters, then east for 14 meters, then north 11 meters, then south 9 meters, then west 16 meters.

The Pythagorean Theorem states that the square of the hypotenuse (the total displacement) is equal to the sum of the squares of the other two sides:

Displacement^2 = 12^2 + 14^2 + 11^2 + 9^2 + 16^2
Displacement^2 = 1444
Displacement = 38.2 meters
To determine the direction of the displacement, we can use the arctangent function.
Arctan(Y/X) = Arctan(11/16)
Arctan(Y/X) = 28.02°
Since Susie started walking South, the total displacement is 28.02° Northwest.
Therefore, Susie's final displacement is 52 meters Northwest.

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Answer:

please specify you question well

A thin lens of focal length −12.5 cm has a 5.0cm tall object placed 10 cm in front of it. The image is located 50 cm behind the lens. The correct option is D.

The image formed by a thin lens can be determined using the lens formula:

1/f = 1/v - 1/u

Where:

f is the focal length of the lens

v is the image distance from the lens (positive for real images on the opposite side of the object)

u is the object distance from the lens (positive when the object is on the opposite side of the lens)

Focal length (f) = -12.5 cm (negative sign indicates a diverging lens)

Object distance (u) = 10 cm

Substituting these values into the lens formula:

1/-12.5 = 1/v - 1/10

Simplifying the equation:

-0.08 = 1/v - 0.1

Rearranging the equation and calculating:

1/v = -0.08 + 0.1

1/v = 0.02

v = 1/0.02

v = 50 cm

The image is located 50 cm behind the lens.

Therefore, the correct answer is d. 50 cm behind the lens.

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Answer:

3

Explanation:

If there is 3 at the moment (atm) is the same as might be (mb) in the air.

The half-life of 40K is approximately 1.3 billion years. Given a ratio of 40Ar/40K as 3/1 in a granite sample, we can estimate the age of the sample by understanding the decay process.  Based on the given 40Ar/40K ratio, the age of the sample is approximately 650 million years.

Since the half-life of 40K is 1.3 billion years, this means that after each half-life, half of the 40K atoms will have decayed into 40Ar. Therefore, if the ratio of 40Ar/40K is 3/1, it suggests that three-quarters (or 75%) of the original 40K atoms have decayed into 40Ar.

To determine the age, we can calculate the number of half-lives that have occurred based on the remaining 25% of 40K. Since each half-life is 1.3 billion years, dividing the remaining 25% by 50% (half) gives us 0.5. Thus, the sample has undergone 0.5 half-lives.

Multiplying 0.5 by the half-life of 1.3 billion years gives us an estimated age of 0.65 billion years, or 650 million years, for the granite sample.

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Heat transfer (in j) occurs from a system Q = - 156 J.

We use thermodynamics principles in this situation. There are already obtained relationships for intense properties like internal energy (U), heat transfer (Q), and work (W) that were based on differential equations. The formula is

ΔU = Q + W

But since these factors depend on their signs, we must remember to take them into account. Van Ness, Smith, and Abbott assert that declining has a negative sign convention. If work is being done ON the system, the sign is positive; however, if work is being done BY the system, the sign is negative. in this instance,

ΔU = - 200 J\sW = - 44 J

In that case, Q can be found.

-200 J = Q - 44 J

heat transfer (in j) occurs from a system Q = - 156 J.

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Given data

*The given mass of mercury is m = 10.0 kg

*The value of latent heat of vaporization of mercury is

The formula for the heat is needed to vaporize 10.0 kg of mercury at its boiling point is given as

Substitute the known values in the above expression as

Hence, the heat is needed to vaporize 10.0 kg of mercury at its boiling point is Q = 2.7 × 10^6 J

Answer : Natural

Explanation : Natural resources are the resources that are found in the environment and are developed without the intervention of humans

Answer:

8lb

Explanation:

The 8lb hammer would the choice hammer to attain the farthest throw in the contest.

This is because, the force applied on all the hammer that would be thrown is the same.

In order to prevent overloading of any circuit, dual rail electrical supply includes independent tracks and P C B traces that are used to offset voltage sags between various circuits.

Using conductive paths, tracks, or signal traces etched from copper sheets laminated onto a non-conductive substrate, a printed circuit board, or PCB, is used to mechanically support and electrically link electronic components.

Semiconductors are used by practically all inverters to generate a controlled power output. An input voltage is rectified if the source has an ac input.

It is, therefore, the proper response.

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Answer:

yes

Explanation:

masses attract each other

with a teeny-tiny force

If the mass of the moon is equal to 1 x 10²⁰ kg and the gravitational force exerted by the planet is equal to 2 x 10²¹ N, then the centripetal acceleration of the moon is equal to 20 m/s².

Centripetal acceleration is defined as the constant change in velocity for an object to maintain a circular path. Recall that change in velocity is called acceleration. One way for an object to accelerate is to change direction. An object that is constantly changing directions is accelerating.

We're given that the mass of the moon is equal to 1 x 10²⁰ kg and the gravitational force of the planet is equal to 2 x 10²¹ N. To find the centripetal acceleration, we'll only need to divide the force by the mass since acceleration is equal to force over mass (a = F/m).

The centripetal acceleration of the moon is calculated as follows:

a = F/m

a = (2 x 10²¹) / (1 x 10²⁰)

a = 2 x 10¹

a = 20

a = 20 means the centripetal acceleration is equal to 20 m/s².

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Answer:

I need help on this tooo

Explanation:

Option d is correct. all of the above. In projecting statements, the analyst makes judgments about various aspects of the firm's financial decisions and strategies, including working capital policies, cash reserves, and capital expenditures.

These projections involve making estimations and assumptions based on historical data, industry trends, and the company's future plans.

a. Working capital policies: Working capital refers to the funds a company uses for day-to-day operations and managing its short-term obligations. The analyst assesses the firm's working capital policies, such as how it manages its current assets and liabilities, to project future cash flows and liquidity.

b. Cash reserves: Cash reserves refer to the amount of cash and cash equivalents a company holds to meet its immediate financial obligations or take advantage of investment opportunities. The analyst considers the firm's cash position, cash flow projections, and cash management strategies to project future cash reserves.

c. Capital expenditures: Capital expenditures (CapEx) represent the funds invested by a company in long-term assets, such as property, plant, and equipment. The analyst evaluates the firm's CapEx plans, growth strategies, and investment decisions to project future capital expenditures.

When projecting statements, the analyst considers multiple factors, including working capital policies, cash reserves, and capital expenditures. These judgments are essential for estimating future financial performance and evaluating the firm's financial health and investment potential. By analyzing these aspects, the analyst provides insights into the firm's financial outlook and helps stakeholders make informed decisions.

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True. The direction of the magnetic field at a given location is determined by the direction that the north pole of a compass points when placed at that location.

A compass needle aligns itself with the Earth's magnetic field, with the north pole of the compass needle pointing towards the Earth's magnetic north pole. This property of the compass can be attributed to the interaction between the Earth's magnetic field and the magnetized needle within the compass.

The Earth itself acts as a giant magnet, with its magnetic field generated by the movement of molten iron in its outer core. The Earth's magnetic field extends from its interior and surrounds the planet.

When a compass is placed at a particular location, the magnetized needle aligns itself with the Earth's magnetic field lines. The north pole of the compass needle points towards the magnetic north pole of the Earth, which is close to the geographic south pole. This allows us to determine the direction of the magnetic field at that location.

Therefore, it is true that the direction of the magnetic field at a given location is indicated by the direction that the north pole of a compass points when placed at that location.

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Answer:

The answer is "4".

Explanation:

The luminaire would be recessed inside a wall, so that, dependent on the surface mountings, its top-level is flush with the ceiling. It is the hanging under the primary structural, in which the drop was an area of the above falling ceiling, that referred to its full space, because it will be generally used for the HVAC air return and the total space is also used to obfuscate piping, cabling, and ducts, that's why the middle-to-middle spacing of curved lighting systems would have to be in incremental increases of 4 ft.

Answer:

The acceleration of man 1 and 2 is \(3.125\ m/s^2\) and \(4.167\ m/s^2\).

Explanation:

Mass of man 1, m₁ = 80 kg

Mass of man 2, m₂ = 60 kg

One man pulls on the rope with a force of 250 N.

Let a₁ is acceleration of man 1,

F = m₁a₁

\(a_1=\dfrac{F}{m_1}\\\\a_1=\dfrac{250}{80}\\\\a_1=3.125\ m/s^2\)

Let a₂ is acceleration of man 1,

F = m₂a₂

\(a_2=\dfrac{F}{m_2}\\\\a_2=\dfrac{250}{60}\\\\a_2=4.167\ m/s^2\)

So, the acceleration of man 1 and 2 is \(3.125\ m/s^2\) and \(4.167\ m/s^2\).

a) Acceleration is zero  

b) Speed ​​is zero

a) The equation of the simple harmonic motion is

x = A cos (wt +φ)

where

A = amplitude of the movement,

w= angular velocity and

φ = phase

Body acceleration is

a = d²x / dt²

dx / dt = - A w sin (wt + φ)

a = d²x / dt² = - A w² cos (wt + φ)

when it is not stretched x = 0

The spring is released at maximum elongation, φ = 0

0 = A cos wt

Cos wt = 0        

wt = π / 2

a = -A w² cos π/2 = 0

Acceleration is zero

c) When the spring is compressed x = A

Speed ​(v) = dx / dt

v = - A w sin wt

A = A cos wt

cos wt = 1        

wt = 0, π

v = -A w sin 0 = 0

Speed ​​is zero

Complete question:

A mass is connected to a spring and is allowed to move horizontally. The mass is at a position L when the spring is unstretched. The mass is then moved, stretching the spring, and released from rest. It then moves with simple harmonic motion. (a) At the instant that the mass passes through the position where the spring is unstretched, what can be said about its instantaneous acceleration? Grade Summary It is maximum. OIt is zero It is non-zero but not maximum Potential per attempt) Hint I give up 1% -ム33%Part (b) At the instant that the spring is compressed the most, what can be said about the magnitude of its instantaneous velocity?

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Answer:

Acceleration is 0. Acceleration is the change in velocity over time, so if acceleration is 0, the change in velocity is 0 no matter how much time passes. THIS DOES NOT MEAN VELOCITY IS 0. it only means that velocity is constant. In other words, the speed of motion will not change

Explanation:

Answer:

The equivalent or total resistance of the circuit is 6

Explanation:

6 &6 are in series

6+6=r

r= 12

1/Rtotal= 1/12+1/2

1/Rt=2/12=1/6

Rt=6

Answer:

If the scale readings are different then there will be a net force on the person attached to the scales:

Consider any point on the rope - if the forces in each direction are the same there is no acceleration of the rope

F = Δm * a        for any portion of the rope with mass Δm

If any portion of the rope is accelerated, the person attached to the rope must be accelerated

Radioactive element  which keeps on decaying over the time. Decay of radioactive element always comes under first order kinetics. Therefore the half life time of  radioactive substance is 2seconds.

Half life tells about the time at which the radioactive material decays to half of its initial concentration.

Mathematically,

half life time=0.693/  rate constant of the decay

The half life of a radioactive substance is the time taken for the activity to halve. Using the graph to calculate the half life of the radioactive isotope, we find that activity that is 3500 so, half of this activity is 17500 which is corresponding to time 2 seconds.

Therefore the half life time of  radioactive substance is 2seconds.

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Gravity The principal factor governing the planets' orbits around the sun is gravity. While each planet has its own gravity that is determined by its size and speed of motion, orbit is determined by the gravity of the sun.

If you were to stand on the surface of any planet in the solar system, or, in the case of the ice giants, float in its atmosphere, you would feel the following gravitational pull: Venus: 0.9 g Mercury: 0.38 g Moon: 0.17 g Mars: 0.38 g Saturn: 1.07 g Jupiter: 2.53 g 0.89 g Uranus Jupiter: 1.14 g The Planets' Gravitational Pull The two driving forces that propel the planets around the sun.

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0.525 m³ minimum volume must the slab have for a 42.0 kg woman to be able to stand on it without getting her feet wet.

Add the biggest possible inaccuracy to each metric, then multiply to get the biggest volume you can. Subtract the largest potential mistake of each measurement, then multiply, to determine the smallest volume that can be produced.

1000 kg/m³ = density of water

920 kg/m³ = density of ice

BF = Woman Weight + Slab Weight

Pvg = 42 + Pvg

V = 42 kg / (1000 - 920)

V = 42 / 80

V = 0.525 m³

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Answer:

On the other hand, power is a scalar quantity and is basically the amount of energy consumed per unit time which has no direction.

Horsepower HP 746 watts

Kilowatts kW 1×103W

Megawatts MW 1×106W

Gigawatts GW 1×109W

The S.I unit of power is Watt(W) which is joule per second.