Describe how to determine the number of electrons using the Periodic Table of the Elements

Answer:

KE = KE (incidental) - KE of emitted photons

or KE = h * f - Wf

So   h * f = KE + Wf = 1.2 + 1.88 = 3.08    incident energy

If you double the frequency then h * f = 6.16

KE = 6.16 - 1.2 = 4.96 eV

Answer:

There are three main parts to the Sun's interior: the core, the radiative zone, and the convective zone. The core is at the center. It the hottest region, where the nuclear fusion reactions that power the Sun occur. Moving outward, next comes the radiative (or radiation) zone.

Answer:

B.core, radiative zone, convective zone, and photosphere

Explanation:

Edge 2021

Option B; In a mechanical wave, the restoring force is the force that actually causes the oscillation opposite the direction of the displacement from equilibrium.

Oscillation is the repeating or periodic oscillation of a quantity, often in time, around a central value (often an equilibrium point) or between two or more states. A swinging pendulum and alternating current are two common examples of oscillation. Physics can employ oscillations to simulate intricate interactions, as those between atoms.

The beating of the human heart (for circulation), business cycles in economics, predator-prey population cycles in ecology, geothermal geysers in geology, the vibration of the strings in guitars and other string instruments, the periodic firing of nerve cells in the brain, and the periodic swelling of Cepheid variable stars in astronomy are just a few examples of the dynamic systems that exhibit oscillations in nearly every branch of science.

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The equation F ≤ mg gives the vertical force he must apply to the pole. The magnitude of the force is 90.0 times the acceleration if the mass of the firemen is 90kg.

The given data is:

Mass of firemen = m

Acceleration = a

a.

There are two forces acting on the fireman. They are his weight (mg) acting downwards, and the force of friction (F) between the pole and the fireman acting upwards.

The fireman is sliding down the pole, and the force of friction must be less than the force of gravity acting toward the fireman or equal. Therefore, the equation giving the vertical force he must apply to the pole is,

F ≤ mg.

b.

If the fireman's mass is 90.0 kg and he accelerates at a rate of a.

The magnitude of his applied force can be calculated by:

a = F/m

To calculate the Forec, we can rearrange the equation as:

F = ma

F = (90.0 kg) x (a)

Therefore we can conclude that the magnitude of the force is 90.0 times the acceleration a.

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Answer:

kinetic energy = 1 / 2 mv²

kinetic energy = 1 / 2 × 20 × 10 ²

kinetic energy = 1000 joules

.........

Balanced force does a window washer want acting on him when trying to keep the same position.

What is force?
Force is an external influence that is capable of changing the motion of a body, either by a push or pull, or by causing a change in the shape or direction of the body. Force is a vector quantity, meaning it has both magnitude and direction. It can be a result of either physical contact, like pushing or pulling, or a non-contact force, such as gravity, magnetism, or electricity. Force is a fundamental concept in physics and its effects are studied in numerous fields, from mechanics to thermodynamics. Force can be used to move objects, cause objects to change shape, or cause objects to accelerate. It is a powerful tool for understanding physical phenomena.

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The formula V = π r² h or V = π R² H is used to measure the volume of a cylinder.

The volume of a cylinder is the density of the cylinder which indicates the amount of material that can be held in it or how much amount of any material can be immersed in it. To find a cylinder's volume, the formula to be used is v = π r² h (V = π R² H). In this formula, V is the volume of the cylinder; π r² represents the area of the base of the cylinder, with radius 'r'; h is the height of the cylinder.

Therefore, the given V = π r² h or V = π R² H is the formula to calculate a cylinder's volume.

"

Correct question is as follows:

What formula is this V = Πr²h or V = π R² H?

"

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The work done on the Puck by the applied force from the most positive to the most negative is c, b, a respectively.

According to Newton's second law of motion, the force applied to an object is directly proportional to the product of mass and acceleration of the object.

F = ma

\(F= \frac{mv}{t}\)

The force applied to an object increases with increases in the velocity of the object.

In the given diagram, the resultant velocity of the puck is calculated as follows;

Figure a:

\(\Delta v = v_f -v_i\\\\\Delta v = 5 - 6 = - 1 \ m/s\)

Figure b:

\(v = \sqrt{4^2 + 3^2} \\\\v = 5 \ m/s\)

Figure c:

\(\Delta v = 4 - (-2)\\\\\Delta v = 6 \ m/s\)

Thus, the work done on the Puck by the applied force from the most positive to the most negative is c, b, a respectively.

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Answer:

1. the attractive force that holds atoms or ions together

2. the average distance between the nucleus of two bonded atoms

3. the angle formed by two bonds to the same atom

The linear expansivity of brass of length 120 m that assumed a new length of 120.05 m when heated to a temperature 100° c​ is 4.167.10⁻¹⁶ 1/K.

Linear expansivity is the ratio of the length increase of a solid specimen to the temperature change. The expansivity (α) of a specimen is given by the formula l2 = l1(1 +), where l1 is the length of the specimen, and l2 is the length of the specimen when the temperature increases by °.

The linear expansion coefficient can be written in SI units as either °C-1 or °K-1. C in this context stands for Celsius, and K for Kelvin. M0L0T0K1 will be the size of the linear expansion coefficient.

Modifying or lengthening is referred to as expansion. When one dimension (length) changes in length in relation to the volume, this is referred to as linear expansion.

When the temperature rises by one degree, a solid's linear expansivity increases by a fractional amount.

calculate the linear expansivity of brass of length 120 m ?

Assuming the temperature change is 100°C.

       α=L−L0/L0- ΔT⇒(1)  Δ Greek value is 4

Given L=120

L0=120.05

T=100°c

 substitute the given values in equation 1 we have

        α=120-120.5/120.05-4(100)

           =4.167.10⁻¹⁶ 1/K

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Answer:

in the nucleus of the atom

Explanation:

a p 3 x

In series.

Single-pole and single-throw switch:

A switch with only one input and one output is referred to as a Single Pole Single Throw (SPST) switch. This indicates that it has a single output terminal and a single input terminal.

A single pole, one throw switch functions as an on/off switch in circuits. The circuit is turned on when the switch is closed. The circuit is shut off when the switch is open.

Thus, SPST switches are relatively basic in design.

Circuit for a single-pole, single-throw (SPST) switch

Types:

According to the application, it can be divided into three categories, including:

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Answer:

Vf = 11.04 m/s

Explanation:

First, we consider free fall motion with zero initial velocity. Using 2nd equation of motion:

h = Vi t + (1/2)gt²

where,

h = height of bridge = ?

Vi = Initial  Speed  = 0 m/s

t = time taken = 4.5 s

g = 9.8 m/s²

Therefore,

h = (0 m/s)(4.5 s) + (1/2)(9.8 m/s²)(4.5 s)²

Therefore,

h = 99.225 m

Now, we consider the forced motion when the youth throws the ball with some negative initial energy:

Vi = - Vi

t = 3 s

h = 99.225 m

Therefore,

99.225 m = - Vi(3 s) + (1/2)(9.8 m/s²)(3 s)²

Vi = (- 99.225 m + 44.145 m)/3 s

Vi = - 18.36 m/s

Now, we use this in 1st equation of motion for final velocity:

Vf = Vi + gt

Vf = -18.36 m/s + (9.8 m/s²)(3 s)

Therefore,

Vf = 11.04 m/s

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Here's the solution :

Let's find the final velocity :

Initial velocity (u) = 0 (cuz it started from rest)

Final velocity (v) = 8 m/s

Time taken (t) = 10 sec

now, we know that :

Acceleration = 0.8 m/s²

a concentric ring model in which social groupings are spatially organised in a hierarchy of rings. The upper class resides further away from the center, while the lower class is located closer to it.

The concentric ring model operates on the presumption that cultural content results from the incorporation of original ideas into the creation and/or presentation of music, text, and picture, and that these concepts originate in the fundamental artistic creativity spheres. Burgess' concentric ring model concept envisions growth occurring in a series of concentric rings surrounding the concentric ring model . According to Hoyt's sector model, economic expansion follows transportation corridors.

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Trailing azalea grows in harsh environments such as rocky slopes, cliffs, and other areas with poor soil and low moisture.

Trailing azalea, also known as Rhododendron canescens, is a native plant in the southeastern United States. This plant prefers acidic soils, but it can grow in a variety of soil types, including poor soil with low moisture. Trailing azalea is commonly found growing on rocky slopes, cliffs, and other areas with harsh environmental conditions. It is a hardy plant that can withstand drought and extreme temperatures.

In summary, trailing azalea grows in harsh environments such as rocky slopes, cliffs, and areas with poor soil and low moisture. This plant is adapted to survive in these challenging conditions, making it an important part of the ecosystem in the southeastern United States.

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The acceleration of the Moon in its nearly circular orbit of 385000 km radius is approximately 2.67 × 10^-3 m/s^2.

The acceleration of the Moon can be calculated using the formula for centripetal acceleration, which is given by:

a = v^2/r

where v is the velocity of the Moon in its orbit and r is the radius of the orbit.

Since the Moon's orbit is nearly circular, we can assume that the velocity of the Moon is constant. To calculate the velocity, we can use the following formula:

v = 2πr/T

where T is the period of the Moon's orbit, which is 27 days.

First, we need to convert the radius and period to consistent units. Since we want the answer in meters per second squared, we'll use meters for the radius and seconds for the period:

r = 385000 km = 385000000 m

T = 27 days * 24 hours/day * 60 minutes/hour * 60 seconds/minute = 2,184,000 s

Next, we can calculate the velocity of the Moon:

v = 2πr/T = 2π * 385000000 m / 2,184,000 s = 1,014.4 m/s

Finally, we can calculate the acceleration:

a = v^2/r = (1,014.4 m/s)^2 / 385000000 m = 2.67 × 10^-3 m/s^2

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Answer:

(i)    t = 5s

(ii)    x = 3.75*10^5 m

Explanation:

(i) To calculate the time that the electron takes to reach twice the value of its initial velocity, you use the following formula:

\(v=v_o+at\)         (1)

vo: initial velocity of the electron = 5*10^4 m/s

v: final velocity of the electron = 2vo = 1*10^5 m/s

a: acceleration of the electron = 1*10^4 m/s^2

You solve the equation (1) for t, and replace the values of the parameters:

\(t=\frac{v-v_o}{a}=\frac{1*10^5m/s-5*10^4m/s}{1*10^4m/s^2}=5s\)

The electron takes 5s to reach twice its initial velocity.

(ii) The distance traveled by the electron in such a time is:

\(x=v_ot+\frac{1}{2}at^2\)          (2)

you replace the values of the parameters in the equation (2):

\(x=(5*10^4m/s)(5s)+\frac{1}{2}(1*10^4m/s^2)(5s)^2\\\\x=3.75*10^5m\)

The distance traveled by the electron is 3.75*10^3m/s

The force F1 is equal and opposite to the downward force thus, F1 is equal to 60 N. The force F2 is inclined to 30 ° from leftward force and it is equal to 38.97 N in magnitude.

Force is an external agent acting on a body to deform it or to change its state of motion or rest. Force is a vector quantity and it is characterised by its magnitude and direction.

If two forces acting on a body from the same directions, then the net force will be the sum of these two forces. If they are acting from opposite directions, they will cancel each other in magnitude.

The force F1 is equal and opposite to the force acting downward. Thus its magnitude is 60 N. The force F2 is inclined to 30 ° from horizontal direction.

F2 = 45 cos 30 = 38.9 N.

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Answer:

C. 540 N

Explanation:

Let suppose that system formed by the athlete and the load are in equilibrium. By Newton's Laws of Motion, we use the moment equation with respect to the feet of the athlete to determine the upward force exerted by his two arms:

\(\Sigma M = -F\cdot r_{1} + m_{L}\cdot g \cdot r_{2} + m_{A}\cdot g \cdot r_{3} = 0\)

\(F = \frac{(m_{L}\cdot r_{2} + m_{A}\cdot r_{3})\cdot g}{r_{1}}\) (1)

Where:

\(m_{L}\) - Mass of the load, in kilograms.

\(m_{A}\) - Mass of the athlete, in kilograms.

\(g\) - Gravitational acceleration, in meters per square second.

\(r_{1}\), \(r_{2}\), \(r_{3}\) - Distances with respect to the feet, in meters.

\(F\) - Upward force exerted by his two arms, in newtons.

If \(m_{L} = 6\,kg\), \(r_{2} = 1.20\,m\), \(m_{A} = 70\,kg\), \(r_{3} = 0.90\,m\), \(g = 9.807\,\frac{m}{s^{2}}\) and \(r_{1} = 1.30\,m\), then the upward force is:

\(F = \frac{[(6\,kg)\cdot (1.20\,m)+(70\,kg)\cdot (0.90\,m)]\cdot \left(9.807\,\frac{m}{s^{2}} \right)}{1.30\,m}\)

\(F = 529.578\,N\)

The upward force exerted by his two arms is 529.578 newtons. (Right answer: C)

B. An addition of 400 J of GPE and a loss of 250 J of thermal energy

The law of conservation of energy states that energy can neither be created nor destroyed but can be converted from one form to another.

From first law of thermodynamics;

ΔU = Q + W

where;

Thus, the scenario that will increase the total energy of a system is "An addition of 400 J of GPE and a loss of 250 J of thermal energy".

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Answer:

B. Newton's second law of motion

Explanation:

Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.

Mathematically, it is given by the formula;

\( Net \; Force = mass * acceleration \)

Making acceleration the subject of formula, we have;

\( Acceleration = \frac {Net \; Force}{Mass} \)

In this scenario, the acceleration of a baseball after it is hit by a bat depends on the mass of the ball and the net force on the ball. Thus, this example best illustrates Newton's second law of motion.

Explanation:

Given parameters:

Force  = 500N

Acceleration  =

Unknown:

Weight can be used to this problem = ?

Solution:

Weight is the vertical force on a body;

       Weight  = mass x acceleration

So from this we can find the mass and then convert to the second wealth.

Answer:One of this country's most notable achievements will be spending Canada Day weekend marking its own milestone anniversary in a unique place, floating up in space.

After 10 years in the ether, several times farther from Earth than the International Space Station, it remains the world's smallest space telescope.

MOST was also Canada's first-ever space telescope when it was launched into space on June 30, 2003.

It has helped make Canada a leader in the field of micro satellites.

But Matthews is particularly enthused about all the other possibilities that might be opened up by the 60-kilogram MOST.

The colorful University of British Columbia astrophysicist firmly believes there is life outside our solar system.

"Certainly simple forms of life like microbial life is probably very common — and I hope complex life," Matthews said in a recent interview. "If it's out there, we're finding the places where it's most likely to live."

I have no Idea if this helps but hope it does.

Answer:

Thermal energy, or heat, is the energy that comes from the movement of atoms and molecules in a substance. Heat increases when these particles move faster. Geothermal energy is the thermal energy in the earth. Motion energy is energy stored in the movement of objects. so the answer is thermal energy

Answer:    food, water, habitat, and mate.

Explanation:      The common limiting factors in an ecosystem are food, water, habitat, and mate. The availability of these factors will affect the carrying capacity of an environment. As population increases, food demand increases as well

Regarding friction and the brake system in the preceding sentence, Techs A and B are correct.

The heat produced by friction between brake drum linings and drums also reduces the mechanical energy required to move the brake drums and wheels. In conclusion, both experts are accurate because the brake-by-wire system is known to frequently use the electric motor as a type of generator, which helps to reduce the vehicle The following expression can be used to determine the car's kinetic energy (Ek). Ek = 1/2 m/v2 = 1/2 (1450 kg)/(36 m/s)2 = 9.4 105 J. where, m: mass, speed v. As soon as the car comes to a halt, this energy is transformed into heat (Q), which is then utilized to increase the temperature of the iron brake drums. Q = c × m × ΔT where c: particular heat, m: mass. T: Alteration in temperature

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