Negatively charged particles found in shells around the nucleus of a particular atom.

Its speed when its height was half that of its starting point is 28.28 m/s

v = 36 m/s is the roller coaster's final speed.

applying the fundamental motion equation;

V² = U² + 2gh

where;

V is the roller coaster's final speed.

U is the roller coaster's starting speed, which is 0

h is the height achieved at a specific speed.

40² = 0 + (2 x 9.8)h

1600 = 19.6 h

h = 1296/19.6

h = 81.63 m

h₂ = 1/2 h when its height was half that of its beginning point.

h₂ = ¹/₂(81.63 m) = 40.81 m

At h = 40.81 m, V = ?

V² = U² + 2gh

V² = 0 + 2 x 9.8 x 40.81

V² = 800

V = √800

V = 28.28 m/s

As a result, it moved at a speed of 28.28 m/s when its height was half that of its starting point.

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The electric field at x=5.00 cm in Figure 18.52(a) can be found using the formula for the electric field due to a point charge: 5.62 x 10⁵ N/C

E = k × q / x²,

where k is the Coulomb constant, q is the charge, and x is the distance from the charge. Substituting the given values, we get: E = (8.99 x 10⁹N m²/C²) ×(1.57 x 10⁻⁶ C) / (0.05 m)² = 5.62 x 10⁵ N/C

When charge is present in any form, a point in space has an electric field that is connected to it. The value of E, often known as the electric field strength, electric field intensity, or just the electric field, expresses the strength and direction of the electric field. Without any precise information of what generated the field, simply knowing the value of the electric field at a certain location is sufficient to predict what would happen to electric charges nearby.

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A study that uses two sets of variables and a scientific methodology is called experimental research. You use the first set as a reference point to calculate the differences between the second set. For instance, quantitative research techniques involve experimentation. You can specify and set your own experimental parameters. The highest temperature to which a solution can be heated, for instance. Although classification factors cannot be defined or set, they can be recognized, and your samples can be chosen in accordance with them. such as a person's gender or age. True experiments must include manipulation, control, random assignment, and random selection. The most important aspects are the manipulation and control of these elements. The Experimental Psychology Method by Using an experimental strategy, one variable is changed to see if it has an impact on another. In order to test a hypothesis, this strategy employs controlled research methods and random subject selection.  T Therefore, any variable in a research project that is actually kept constant is referred to be a control variable. Despite not being a study-relevant variable, it is controlled anyway because it might have an impact on the results. 01-Mar-2021

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An experimental factor (also known as an independent variable) is a variable that is manipulated by the experimenter in order to observe its effect on the outcome of the experiment.

Experimental factors are variables that are controlled and manipulated by a researcher during an experiment. These factors can be either independent variables, which are the conditions the researcher changes, or dependent variables, which are the behaviors or outcomes that are observed and measured as a result of changing the independent variables. Experimental factors are important in determining the results of an experiment, and it is important for researchers to have an understanding of the potential effects of different combinations of factors.

It is the variable that the researcher changes or controls in order to measure the effect it has on the dependent variable, which is the variable being measured.

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-3m/s is the rate of change of the distance between the cars at that instant

What does the word "speed" mean?

Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is travelling along a path.

First car's speed is 5 m/s.

The second car is moving at 8 m/s.

The first car is 15 meters from the intersection at a specific moment.

Second car is also 20 meters from junction at the same moment.

the car's speed, expressed as dx/dt, or the rate of change of distance.

Their distance from one other using the Pythagoras theorem is given as

Z²=X²+Y²

Z²=15²+20²

Z²=225+400

Z²=625

Z=√625

Z=25m

Taking a step in that direction

Suppose the first vehicle is going in the direction of positive x, then

dx/dt=5m/s

The second vehicle will also be travelling against y.

dy/dt=-8m/s

Let's apply the Pythagoras formulas above to determine dz/dt presently.

x²+y²=z²

differentiating in light of t

2dx/dt+2dy/dt=2dz/dt

Multiply through by 2

dz/dt=dx/dt+dy/dt

dz/dt=5-8

dz/dt=-3m/s

The speed at which the distance between the two bodies change is -3m/s

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4.9m/s^2 will be the acceleration of a skydiver when air resistance is half the weight of the skydiver

What is acceleration?

The rate at which velocity changes is called acceleration. Acceleration typically indicates a change in speed, but not necessarily. An item that follows a circular course while maintaining a constant speed is still moving forward because the direction of its motion is shifting.

Acceleration occurs in the direction of the velocity change, which is the same direction that the circular path's center of rotation points. The centripetal acceleration typically has a negative sign in vector form. This is due to the centripetal acceleration, which is along the radius vector pointing toward the center of the circular motion, being in the opposite direction to that of the radius vector.

Let m be the mass of the skydiver.

The acceleration due to gravity is g = 9.8m/s^2

W = mg

W -Fr = ma

Fr = W/2

W/2 = ma

mg/2 = ma

a = g/2

a = 9.8/2 = 4.9m/s^2

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To calculate grams to atoms are mentioned below.

What is atom?

A substance's tiniest component that cannot be destroyed chemically. A proton (a positive particle) and a neutron (a neutral particle) make up the nucleus (center) of each atom (particles with no charge). The nucleus is filled with negative electrons. Chemical reactions cannot generate or destroy atoms since they are indivisible particles. The mass and chemical makeup of an element's atoms are the same. The masses and chemical characteristics of atoms differ amongst elements.

What is gram ?

The International System of Units (SI) defines the gramme as one thousandth of a kilogramme of mass. The gramme was the name given to it at first. This cap for a pen weights about one gramme.

Therefore, calculate grams to atoms are mentioned below.

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The stopping distance is 8.33.

Let's use the equation s = v0t + 1/2at^2 to solve for the stopping distance.

s = 8.33t + 0.5(0)(t^2)

s = 8.33t

Since the acceleration is 0, the stopping distance is equal to the total distance the car traveled while its velocity was 8.33.

What is distance?

Distance is the amount of space between two points. It can be measured in various units such as miles, kilometers, feet, and meters. Distance can also be used to describe the length of time or amount of effort it takes to reach a certain point. Distance can be used in reference to physical space or to abstract concepts.

Therefore, The stopping distance is 8.33.

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The tidal datum or zero tide used along the California Coast is the mean higher low water.

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The other two interior angles are calculated to be both 56.0 degrees.

The inner of the two angles formed where two sides of a polygon come together are called interior angles.

Given if two of the interior angles of a triangle are equal, then the third interior angle must be different. Let's call the equal angles "x". The sum of all interior angles of a triangle is 180 degrees, so:

x + x + 68.0 = 180

2x + 68.0 = 180

Subtracting 68.0 from both sides,

2x = 180 - 68.0 = 112.0

x = 56.0

So, the other two interior angles are both 56.0 degrees.

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The requried, value of y at x = 10 cm is zero (implies the object is at rest).

To provide the value of y at x = 10 cm and t = 1.5 s, we need additional information about the specific equation or function that relates y and x, as well as any given initial conditions or boundary conditions.

From the given graph, it can be seen that,
At x = 10; y = 0 (implies object is at rest)

This describes the situation in that the object whose positions have shown through the graph is at rest at x = 10 (velocity becomes 0).

Thus, the requried, value of y at x = 10 cm is zero.

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Using the wavelength of maximum absorption is important in spectrophotometry because it helps to increase the accuracy and sensitivity of the measurement.

The amount of light absorbed by a sample is proportional to its concentration, so spectrophotometry is a useful tool for determining the concentration of a substance in solution. However, not all wavelengths of light are absorbed equally by a sample, and the absorption varies depending on the chemical properties of the substance. By using the wavelength of maximum absorption, the measurement is optimized to detect the maximum amount of light that the sample will absorb, increasing the accuracy of the results. Additionally, using the wavelength of maximum absorption can help to minimize interference from other substances in the sample and improve the sensitivity of the measurement.

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8 degrees Celsius is equal to 46.4 degrees Fahrenheit when converting temperatures from degrees Celsius to Fahrenheit.

Between 32 degrees Centigrade and 41 degrees Fahrenheit, or 0 degrees Celcius with 5 degrees Celcius, should be the temperature of the refrigerator's coldest portion. To determine whether food has been kept warmed (above 63 degrees Celsius) or cold (below 8 degrees Celsius), you might use a probe thermometer.

The most susceptible body parts to frostbite are the fingertips, nose, ears, toes, cheeks, and chin, so use as much protection as you can. How cold is too cold? When the windchill drops below 0 degrees Celsius or the temperature drops below zero, experts generally advise staying inside.

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Let V = {0} consist of a single vector 0, and

define 0+0 = 0 and c0 = 0 for each scalar c in the

field F.

There are two operations on the set. All we have is

must validate each of the eight axioms.

VS1. The addition of commutativity. Indeed, x+y does

given that both are 0 and the sole vector in

the area.

The same justification holds true for VS2 and

from VS5 to VS8. Each axiom is a formula that

claims that one vector is equivalent to another, but since

only one vector, 0, is present, and both sides have it.

to act as the vector.

Axiom VS3 is slightly unique in that it states

that a vector 0 has a specific characteristic

However, V contains a vector of this type, namely 0. Likewise

Axiom VS4 states that there is a vector y for every vector x.

for x + y to equal 0.

Assume that y is 0, and that equation is true (since all vectors equal 0).

It is a vector space over F as a result.

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Due to the possibility of error, experimental measurements do not give the true value of a physical quantity

Experimental measurements are always subject to error, and as a result, they do not give the "true" value of a physical quantity. Instead, experimental measurements provide an approximation of the true value, which is influenced by many factors such as the precision and accuracy of the measurement apparatus, environmental conditions, and observer bias.

In conclusion, experimental measurements do not give the true value of a physical quantity, but they provide an estimate of its value with associated uncertainty, which is useful for making predictions and testing scientific theories.

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A negative charge will move: A. from low to high potential if it is released into a steady electric field.

The Greek word "elektron" is where the word "electricity" originates. Amber, a golden or reddish-brown stone used in jewelry, is the definition of the term electron. Rubbing amber caused it to produce an electrical charge that made it possible to lift lightweight materials like straw and feathers.

How to effectively use the word "electric" This week, I paid the power and water bills. He was riding his electric bike around, so I know it's him. Her heart began to race as a result of his touch, which felt electrifying.

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The lawn mover is exerting a force of 30 N on the man.

Given, a man weighing 60 kg is moving a 30 kg lawnmower.

Thus, the lawnmower's force is calculated as 30N - 60N = -30N.

A force is something that pushes or pulls an object. The objects' interactions with one another are what causes push and pull. Force can also be expressed using words like stretch and squeeze.

Force is an external agent that has the power to alter a body's resting or moving state. It has a size and a movement.

The direction of the force is referred to as the force's direction, and the application of force is the point at which the force is applied.

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Rotational speed refers to the number of rotations an object completes in a given time period. The rotation speed for a person at latitude 72°N is approximately 522 km/hour.

Explanation:

Given,

Latitude = 72°N

The rotation speed can be calculated using the following formula:

V = ω × R

where:

V is the rotation speed,

ω is the angular velocity,

R is the radius of the Earth at the given latitude.

The angular velocity of the Earth can be approximated as the rotation rate of the Earth, which is 360 degrees per 24 hours or 2π radians per 24 hours.

ω = (2π radians) / (24 hours × 3600 seconds/hour) ≈ 7.292 × 10⁻⁵ radians/second

The radius of the Earth at latitude 72°N can be approximated as the product of the equatorial radius (6,378 km) and the cosine of the latitude (cos(72°)).

R = (6,378 km) × cos(72°)

V = (7.292 × 10⁻⁵  radians/second) × (6,378 km) × cos(72°)

V = (7.292 × 10⁻⁵  radians/second) × (6,378 km) × 0.309

V = 0.145 km/second

To convert the rotation speed from km/second to km/hour, multiply by 3600 (the number of seconds in an hour):

V = 0.145 km/second × 3600 seconds/hour

V = 522 km/hour

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Permeability is a measure of a material's ability to: transmit the fluids.

Measure of the ease of flow of a fluid through a porous solid is known as permeability. Rock may be extremely porous, but if pores are not connected, it will not have permeability.

Permeability is determined by applying head and determining depth of penetration or the amount of liquid or gas passing through sample.

Widely used are permeability μ = B0/H0 (B0 is the magnetic flux density B at the point P and H0 is the magnetic field H ) and differential permeability μd = dB/dH.

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The closest distance is 8.4*10^-15m.

So for alpha particle The closest distance is 8.4*10^-15m.

The closest distance between two objects is the distance between their centers if they are circumscribing. Objects can be geometric shapes or physical particles with well-defined boundaries. The closest distance is sometimes called the contact distance.

Given the,

Alpha particles have a distance of 11 Mev from near.

KE energy of alpha particles in terms of system potential energy

11*10^6*1.6*10^-19=PE at closest distance

So d= 8.4*10^-15 m

After resolution. The closest distance is 8.4*10^-15m.

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The spring constant of the gun 80 N/m.

The formula for finding the spring constant is

k=(2mv^2)/x

where m is the mass of the ball, v is the speed of the ball, and x is the distance the spring is compressed.

In this case, m=200 g, v=2.0 m/s, and x=15 cm.

Plugging these values into the formula, we get

k=(2*(200g)*(2.0m/s)^2)/(15 cm)

k=(2*0.2 kg*(4 m^2/s^2))/(0.15 m)

k=80 N/m

What is mass?

Mass is an amount of matter or energy that an object contains. It is measured in kilograms, grams, or pounds. Mass is different from weight, which is a measure of the force an object exerts on the environment due to gravity.

Therefore, The spring constant of the gun 80 N/m.

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The sound intensity level 600m from the siren in db is 0.001w/m² if the sound intensity 60 m from tornado is 0.10w/m².

Sound intensity, otherwise called acoustic power, is characterized as the power conveyed by sound waves per unit region toward a path opposite to that area. The SI unit of sound intensity, which incorporates sound force, is the watt per square meter (W/m²). One application is the commotion estimation of sound power in the air at an audience's area as a sound energy amount.

We know that power output is given =4π×I×r² where I is the sound intensity,and r is the distance upto which sound radiates.

So,firsly we find power output because it will remain same.

So,P=4×π×0.10×60×60--------(eq1)

Now,we need to find sound intensity using the above equation,so,we get

=>P=4×π×I×600×600

=>4×π×0.10×60×60=4×π×I×600×600

=>I = (4×π×0.10×60×60) / 4×π×I×600×600

=>I=0.1/100

=>I=0.001w/m².

Hence,sound intensity level is 0.001w/m².

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The magnitude of the gravitational acceleration on this planet can be calculated using the equation $g = 4\pi^2\frac{L}{T^2}$, where $L$ is the length of the pendulum in meters and $T$ is the time in seconds it takes for the pendulum to complete one full swing cycle.

In this case, the length of the pendulum is $52.0 \textrm{ cm}$, which is equal to $0.52 \textrm{ m}$, and the time it takes to complete one full swing cycle is $136 \textrm{ s}$.

Plugging these values into the equation gives us $g = 9.8 \textrm{ m/s}^2$. Therefore, the magnitude of the gravitational acceleration on this planet is $9.8 \textrm{ m/s}^2$.

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As time increases, the distance between the skydivers decreases, until they eventually collide.

define distance ?

Distance is a scalar quantity that represents the magnitude of separation between two points in space. It can be thought of as the length of the shortest path between the two points. Distance can be calculated by using the Pythagorean theorem or other methods, depending on the geometry of the situation. The unit of distance can be meters, kilometers, miles, or any other unit of length.

The vertical distance between the two skydivers changes over time as they both fall with the same acceleration. If we consider that the initial vertical distance between them is d0, then the vertical distance d between them at time t can be calculated using the following formula:

d = d0 - g * t^2 / 2

where g is the acceleration due to gravity (approximately 9.8 m/s^2) and t is the time elapsed.

Since both skydivers have the same acceleration, they both fall at the same rate and the vertical distance between them decreases linearly with time. As time increases, the distance between the skydivers decreases, until they eventually collide.

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According to a test taker's average test score is indicated by an IQ score of 100 on the Stanford-Binet and Wechsler intelligence test.

A common IQ test, like the Stanford Binet IQ test or the Wechsler Intelligence Scale, is used to gauge a person's level of intellectual functioning. 100 is the global average. Low IQ scores refer to those with scores below 70. Professionals assess the person's adaptable behaviour as well.

The average result for all test takers of the same age is 100.

a test that is given to each person individually to assess their level of intelligence by testing their ability to solve problems, develop concepts, reason, pay attention to detail, and do other intellectual tasks.

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The tank will contain 350 lb of salt when it is full of brine.

Let x be the amount of salt in the tank when it is full.

Then:

x = 50 + 1 * (400 - 100) = 50 + 300 = 350 lb

So, the tank will contain 350 lb of salt when it is full of brine.

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The required amount of power dissipated across the winding is calculated to be 60 W.

The resistance of the dc motor is given as (R) 240 ohms.

The voltage across the winding (V) is 120 v.

From ohm's law, we know that, mathematically, V = i R

Substituting the above values into the equation, we have,

V = i R

i = V/R = 120/240 = 1/2 A

The expression for power dissipated is known to be,

P = i² R

Putting the values into the above equation, we have,

P = i² R = (1/2)² 240 = 60 W

Thus, the amount of power dissipated across the winding is 60 W.

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The mass of the skateboard is approximately 12.8 kg.

Mass can be defined as the measure of the amount of matter in a body. The SI unit of mass is Kilogram (kg).

The momentum of the student + skateboard before and after the jump must be the same, since there are no external forces acting on the system.

Momentum before jump = Momentum after jump

m_student * v_student_before + m_skateboard * 0 = m_student * v_student_after + m_skateboard * v_skateboard

Rearranging and solving for m_skateboard:

Therefore, The mass of the skateboard is approximately 12.8 kg.

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The angle v with arrow makes with the positive direction of the x axis at   t = 9.00 s is -86.23° degrees from the +x axis.

One of the subatomic particles with mass is the electron. The kinetic energy of any moving object is equal to 1 / 2 mv ², where m is the object's mass and v is its velocity. Electron speed V = 1 / 2 mqv ² is an electromagnetic equation.

a) v with arrow(t) = dr with arrow/dt

                                = 2.00i + (-14.00t)j + 0k

b) v with arrow (t = 9.00) = 2.00i + (-14.00  9.00)j + 0k

                                 = 2.00i - 126.00j

c) the magnitude of v with arrow (t = 9.00)

                          = √(2.002 + (-126.00)2)

                                      = 126.00

d) tan(theta) = vy/vx

                               = -126.00/2.00

                              = -63.00,

θ = atan(-63.00)

                                  = -86.23° degrees.

So, the angle v with arrow makes with the positive direction of the x axis at

                        t = 9.00 s is -86.23 degrees from the +x axis.

Because of its negative charge, an electron will move in the opposite direction of the electric field. As a result, it will move to the left. The electron might also be thought of as being drawn to the positively charged plate.

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Charge placed on insulator will spread out over the surface of the insulator : False.

Electrical insulator is a material in which electric current does not flow freely. Material that keeps energy such as electricity, heat, or cold from easily transferring through is insulator and wood, plastic, rubber, and glass are good insulators.

Atoms of the insulator have tightly bound electrons which cannot readily move. Other materials like semiconductors and conductors conduct electric current more easily.

Perfect insulator does not exist as even insulators contain small numbers of mobile charges which can carry current. All insulators become electrically conductive when sufficiently large voltage is applied that electric field tears electrons away from the atoms.

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Answer:

the combined speed of the two railroad cars after the collision is 4/3 m/s.

Explanation:

The combined speed of the two railroad cars after the collision can be calculated using the conservation of momentum principle.

Let's assume the combined speed of the cars after the collision is v'. Then, using the equation for momentum, p = m * v, where m is the mass of each car and v is the velocity of each car, the momentum of each car before and after the collision can be calculated as:

Before the collision:

m1 = 4000 kg, v1 = 2 m/s

p1 = m1 * v1 = 4000 kg * 2 m/s = 8000 kg m/s

After the collision:

m2 = 6000 kg, v2 = 0 m/s

p2 = m2 * v2 = 6000 kg * 0 m/s = 0 kg m/s

Since momentum is conserved, the momentum before the collision must equal the momentum after the collision:

p1 = p2

So,

8000 kg m/s = 6000 kg * v'

Solving for v', we find that:

v' = 8000 kg m/s / 6000 kg = 4/3 m/s

Therefore, the combined speed of the two railroad cars after the collision is 4/3 m/s.