What cause sound seismic and electromagnetic waves to transmit energy through different mediums

100N of horizontal force is required to hold a 3kg book vertically against the wall to prevent it from falling if the coefficient of static friction between the book and the wall is 0.3.

What is friction?

Friction=μN, where N is the normal force.

N = friction/μ.

N = mg/μ

m = 3 kg

g = 10m/s²

μ = 0.3

N = mg/μ

N = 300/3

= 100N

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Object whose position throughout time is represented by a graph Which point in position 6 has the highest speed

A body and object's velocity determines the direction of its motion. Speed is fundamentally a scalar quantity. It is a vector term in its purest form. It refers to the rate at which distance varies.

Any object's velocity is a measurement of how swiftly it moves. Therefore, it can be described as the shift in an object's position divided by time. Both a magnitude (a number) and a direction are associated with velocity. Meters a second (meter/second) is the unit used to measure velocity.

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The common cause for ignition of gasoline vapors during refueling is

static electrical discharge.

Static electricity is an imbalance of electric charges within or on the surface of a material or between materials.

In petrol pumps,

During refueling, many petroleum products become electrically charged when they flow through pipes and hoses, including gasoline, kerosene, petrol, diesel etc. which are poor electrical conductors.

Charge remains until it is able to move away by means of an electric current or electrical discharge which causes the static spark that can ignite gasoline vapors, causing a flash fire.

Hence, static electrical discharge is common cause of all 36 incidents of gasoline vapor ignition.

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The work required to move a test charge of +0.50 C from a point midway between two identical charges of +35 C, 46 cm apart, to a point 12 cm closer to either of the charges would be W = 2.6 x 10^-5 J.

This can be calculated using the equation W = (1/4πε_0) q1 q2 / r, where q1 and q2 are the charges of the two charges, and r is the distance between them. In this case, q1 = q2 = 35 C, and r = 34 cm, so the work required is W = 2.6 x 10^-5 J.

Electrical charge is a fundamental property of matter that exists in two types: positive and negative. Positive charges are attracted to negative charges, while negative charges are attracted to positive charges. This phenomenon is known as electrostatic attraction.

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The sine refraction of the two angles, or sin(c, red) - sin(c, green), is equal to the difference between the critical angles for red and green light.

The critical angle is the angle of incidence (angle between the incoming light and the surface normal) where no more refraction takes place and the refracted ray is just skimming the surface. Beyond this angle, the light won't enter the second medium and will instead begin to reflect back into the first.

Flint glass has red and violet light refractive indices of 1.613 and 1.632, respectively. The refractive indices of the materials define the critical angle.

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The experiment cannot tell us which stopwatch is accurate. Then the correct option is D.

There are two ways to assess observational error: accuracy and precision. Precision measures how closely two measurements are to one another, whereas accuracy measures how close a group of measurements is to its actual value. In other words, precision is both a measure of empirical unpredictability and a description of experimental noise.

Mani is measuring the speed of a car using two digital stopwatches, C1 and C2. He is unsure of the accuracy of the stopwatches. At the beginning of a race on a track that is exactly 5 km long, he starts both stopwatches.

There is no other information is given so that the stopwatches can be judged.

Thus, the correct option is D.

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Because we already know that this function is exponential, that sort of function that describes the amplitude of damped oscillatory motion is exponential. [tex]y=A\times e^{\frac{-b}{2m} }[/tex][tex]\times cos\omega t[/tex]    

The maximum displacement or distance a point on a vibrating body or wave can move in relation to its equilibrium location is referred to as the amplitude in physics. It is equivalent to the half-length of the vibration path. The bob swings halfway across the pendulum's amplitude when it shifts from one side to the other. Waves are produced by vibrating sources, and the amplitude of the waves is inversely proportional to the amplitude of the source. The largest deviation of any point on a transverse wave, such as the wave on a plucked string, from its position when the wave is at rest, is used to determine the wave's amplitude.

[tex]y=A\times e^{\frac{-b}{2m} }[/tex][tex]\times cos\omega t[/tex]    [tex]\rightarrow(1)[/tex]

here function is [tex]A\times e^{\frac{-b}{2m} }[/tex]    is amplitude

as per equation ( 1 ) it is exponential

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The energy difference between the staggered and eclipsed populations of ethane depends on various factors such as bond length, bond angle, and bond energy.

In general, the energy difference between these two populations is proportional to the difference in their molecular structure.]

If the difference in molecular structure between the staggered and eclipsed populations of ethane had only been 30-fold instead of the almost three orders of magnitude, it would result in a proportionally smaller energy difference between them. However, without more specific information about the specific molecular structure and bond energies involved, it is not possible to determine the exact energy difference.

In general, it's important to note that the magnitude of the energy difference between the staggered and eclipsed populations of ethane can be influenced by various factors such as temperature, pressure, and the presence of other molecules. These factors can affect the magnitude of the energy difference and make it difficult to determine an exact value.

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1.16g/cm3 is the density of planet x in g/cm3 if planet x has an estimated mass of 1.78x1027 kg, while its diameter is approximately 142,984 km.

Radius = diameter/2

Radius of the planet X = 142984km/2 = 71492km = 71492000m = 7149200000cm

Volume of the planet X = (4/3) × 3.143 × ( 7149200000cm)3 = 1.53× 1030cm3

mass of the planet X = 1.78 × 1027 kg = 1.78 × 103​​​​​0g

Density = mass /volume

Density of the planet X = 1.78 ×1030g/1.53×1030cm3 = 1.16g/cm3

Density is defined as d = M/V, where d represents density, M is mass, and V is volume. Density is generally measured in grammes per cubic centimetre. Water, for example, has a density of 1 gramme per cubic centimetre, but Earth has a density of 5.51 grammes per cubic centimetre. Density is sometimes measured in kilos per cubic metre (in metre-kilogram-second or SI units).

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a) The heat energy transferred to the outside air is 6.04 × 10^4 J.

b) The net change in the internal energy of the refrigerant is 1.51 × 10^4 J.

c) amount of work done inside is -1.51 × 10^4 J.

d) The net change in the internal energy is 9.06 × 10^4 J

a. The amount of energy transferred as heat to the outside air is the difference between the amount of heat removed from the air inside the refrigerator and the work done on the refrigerant: 7.55 × 10^4 J - 1.51 × 10^4 J = 6.04 × 10^4 J.

b. The net change in the internal energy of the refrigerant is the work done on the refrigerant: 1.51 × 10^4 J.

c. The amount of work done on the air inside the refrigerator is negative of the work done on the refrigerant, as energy is transferred from the air to the refrigerant: -1.51 × 10^4 J.

d. The net change in the internal energy of the air inside the refrigerator is the heat removed from the air minus the work done on the air: 7.55 × 10^4 J - (-1.51 × 10^4 J) = 9.06 × 10^4 J.

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The following equations provide the maximum speed at which an automobile may travel in a circular turn without skidding, (* g * r) = v max As a result, the car can travel at a maximum speed of about 3.23 m/s before skidding during the turn.

A car is a vehicle made specifically to move people and cargo over roads. Although electric and hybrid models have increased in popularity recently, internal combustion engines that use fossil fuels still provide the majority of the power for cars. The steering system, engine, gearbox, suspension, and brakes are a few of the crucial parts of a car. Modern vehicles frequently include a number of extra conveniences, such power windows, air conditioning, and sophisticated safety systems. The introduction of automobiles, which offer a practical and effective mode of transportation and enable the growth of new industries like travel and commuting, has had a significant impact on society.

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Answer:

F = Q E       force exerted by field on charge Q

F = M g    weight of sphere

M g = Q E

E = M g / Q = .0064 kg * 9.80 m/s^2 / 3E-9 C

E = 2.09E7 Newtons/Coulomb  

Work done on an object- Measure of energy transfer when an object is moved over a distance by an external force, at least some of which is applied in the displacement direction.

a. When the road exerts a friction force on a speeding car skidding to a stop, the work done by the friction force is negative. This is because the friction force opposes the motion of the car and slows it down. When the force is in the opposite direction of the motion of an object, the work done by the force is negative.

b. When a rope exerts a force on a bucket as it is raised up a well, the work done by the rope is positive. The force of the rope is in the same direction as the displacement of the bucket, so the work done by the rope is positive. When the force is in the same direction as the motion of an object, the work done by the force is positive.

c. When air exerts a force on a parachutist as they fall to Earth, the work done by the air is negative. The force of air resistance opposes the motion of the parachutist and slows them down, so the work done by the air is negative.

Comparison of work done:

The work done by a force is defined as the product of the force and the distance traveled by an object.

If a neighbour pushes a lawnmower four times as far as you do but exerts only half the force,  neighbour does more work. The work done by neighbour is four times the distance traveled by the lawnmower multiplied by half the force exerted .

To find the exact difference in the amount of work done, calculate the product of the distance traveled by the lawnmower and the difference in the force exerted by each person. Assuming that person  pushed the lawnmower a distance of d units and exerted a force of f units. Then, neighbour pushed the lawnmower a distance of and exerted a force of

The work done by person is given by the equation

The work done by neighbour is given by the equation

The difference in the amount of work done is given by the equation W2 -

So,  neighbour did units more work than the person has done.

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Number of revolutions per minute that the wheels rotates is 504rev/min and angular speed is 3160 rad/min.

Angular speed is characterized as the pace of progress of rakish relocation, and it is communicated as follows: ω = θ t where θ is the precise uprooting, t is the time and ω is the precise speed Rakish Speed Unit The unit of precise speed is radian each second. A similar recipe addresses both precise speed and rakish speed.

The unit of angular speed is radian each second. A similar recipe addresses both precise speed and rakish speed. Angular speed is a vector amount that communicates both bearing and size, while precise speed portrays greatness as it were.

It is given that rate of car is 45 miles/hr.

Firstly,we convert this into inches/min.

In 1mile=5280feet

=>45mile=45×5280

In 1 feet=12inches

=>45×5280feet=45×5280×12inches/hr

In 1 hr=.(45×5280×12)/60inches/min.

Now,we have diameter=2.5feet

=>Therefore,radius=2.5/2=1.25feet=1.25×12inches

So,angular speed=(45×5280×12)/60inches/min / 1.25×12inches

=>angular speed=(47520)/15=3168

Now,number of revolutions is =Distance/Circumference

=>Number of revolutions=(45×5280×12)/60 / 2×3.14×1.25×12

=>Number of revolutions=47520/94.2

=>Number of revolutions=504.45

Hence,number of revolutions=504 and angular speed is 3168/min.

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Isaac is mixing green, blue, and red paints together, and it looks like a muddy mess rather than pure white then the wavelengths are subtracted, rather than added.

Additive and subtractive color mixing are the two major methods of color blending. A procedure known as additive color mixing involves adding one set of wavelengths to another set of wavelengths to produce a new hue. When lights of various wavelengths are combined, additive color mixing results. We see white light rather than numerous distinct hues when we combine all of the sun's various wavelengths. Because all of the wavelengths still reach our eyes, it is called additive. The variety of colors is produced by combining various wavelengths. By removing wavelengths from a light source with a wide spectrum of wavelengths, subtractive color mixing produces a new hue. When we combine paints, dyes, or pigments, subtractive color mixing takes place.

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The net electric field that the particles produce at the square's center will be [tex]E_n_e_t = -2.03[/tex].

To find the net electric field at the center of the square, we need to calculate the electric field due to each particle at that point and then add them up vectorially.

Let's assume that the bottom left corner of the square is at the origin, and the positive x-axis points to the right and the positive y-axis points upwards. Coordinates of four particles:-

q1: (0,0)

q2: (a,0)

q3: (a,a)

q4: (0,a)

here, a = 5.00 cm.

Using the Coulomb's law, the electric field due to each particle at the center of the square:-

[tex]E_1 = k * q_1 / r_1^2[/tex],

here,

[tex]r_1 = a/\sqrt{2}[/tex] is distance between q1 & center of the square.

Since [tex]q_1[/tex] is a positive charge, the direction of its electric field is towards the center of the square.

[tex]E_1 = k * q_1 / r_1^2 * (-i - j)[/tex],

Putting values:-

[tex]E_1 = (9 * 10^9 Nm^2/C^2) * (10.0 * 10^-^9 C) / [(5.00/\sqrt{2} ) m]^2 * (-0.707i - 0.707j)[/tex]

[tex]= -2.03 * 10^5 N/C * (0.707i + 0.707j)[/tex]

Similarly, we can find the electric fields due to q2, q3, and q4:

[tex]E_2 = k * q_2 / r_2^2 * (i)[/tex],

here,

[tex]r_2 = a/2[/tex] is distance between q2 and the center of the square. The direction of its electric field is towards the right:-

[tex]E_2 = (9 * 10^9 Nm^2/C^2) * (-20.0 * 10^-^9 C) / [(5.00/2) m]^2 * i[/tex]

=[tex]-1.44 * 10^6 N/C * i[/tex]

[tex]E_3 = k * q_3 / r_3^2 * (i + j)[/tex],

here,

[tex]r_3 = a/\sqrt{2}[/tex] is distance between [tex]q_3[/tex] and the center of the square.

The direction of its electric field is towards the upper right:-

[tex]E_3 = (9 * 10^9 Nm^2/C^2) * (20.0 * 10^-^9 C) / [(5.00/\sqrt{2} ) m]^2 * (0.707i + 0.707j)[/tex]

= [tex]4.06 * 10^5 N/C * (0.707i + 0.707j)[/tex]

[tex]E_4 = k * q_4 / r_4^2 * (j)[/tex],

here,

[tex]r_4 = a/2[/tex] is distance between [tex]q_4[/tex] and center of the square.

The direction of its electric field is upwards:-

[tex]E_4 = (9 * 10^9 Nm^2/C^2) * (-10.0 * 10^-^9 C) / [(5.00/2) m]^2 * j[/tex]

[tex]= -7.20 * 10^5 N/C * j[/tex]

These four electric fields combine to form the net electric field at the center of the square:

[tex]E_n_e_t = E_1 + E_2 + E_3 + E_4[/tex]

Putting values:-

[tex]E_n_e_t = -2.03[/tex]

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The total charge to conserved that is Q=-6C,Now the sum of the total charges on both the pieces should be Q=Q1+Q2 = -6C,given that one charge is Q1 =2C,  there fore -6 =2+Q2, There fore the charge on other piece is Q2 = -6-2 = -8C.

In accordance with the principle of charge quantization, the total charge on an object must be an integer multiple of the basic charge, which is the fee on an electron (e).Not an integer, this.Thus, a body charged at 2.810-18 C is not possible.

If there are greater proton than electrons, the charge density of the thing is positive.If an object has more electrons than protons, it has a negative net charge.If there are an equal number of protons and electrons, the thing is neutral.

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The car will travel 6.12 km one litre of petrol when driven at this speed

Given the energy provided by one liter of gasoline e = 34 * 10⁶ Joules

efficiency of the car = 40%

The speed of the car is 9.0 ms⁻¹

Power of the car = P = 20 kW

The useful energy produced by the car is equal to

= P * e

Therefore the useful energy is

= 34 * 10⁶ * 40/100

= 1.36 * 10⁷ Joules

Now, we can say that car consumes 20 ± 10³ J/s to travel at the speed of 9 m/s

The time for which the car will keep moving at this speed using the energy provided by 1 liter of fuel is

[tex]t=\frac{1.36*10^{7} }{20*10^{3} }[/tex] = 680 sec

The distance travelled by car during this time is

d = 9 * 680

d= 6.12 km

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The magnitude of the resultant force on the elliptical back will be equal to the difference between gravity and normal force.

The weight of the water and the force of gravity pressing on it determine the size of the resulting force on the elliptical tank truck. The water in the tank truck serves as a weight, creating a force of gravity proportionate to its mass. This force acts vertically downwards and is equal to the weight of the water, which can be estimated by multiplying the mass of the water by the gravity acceleration (g = 9.8 m/s^2).

When the tank truck is half full, the weight of the water may be estimated by multiplying the volume of water by its density and gravity acceleration. The volume of water may be calculated by taking the volume of the elliptical tank and dividing it by half. Water's density is constant and equal to 1000 kg/m3.

The total of the vertical components of gravity and normal force equals the size of the resulting force on the elliptical tank truck. The normal force is equal to the weight of the water and acts vertically upwards, against the force of gravity.

The amount of the resulting force on the elliptical back may be calculated by calculating the weight of the water, determining the force of gravity operating on it, and taking into account the normal force acting in the opposite direction.

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The speed of the ping-pong ball is more than that of the golf ball. Correct option is C.

If the kinetic energy of each ball is equal to that of the other,

(1/2) (mass of ppb) (speed of ppb)² = (1/2) (mass of gb) (speed of gb)²

where,

ppb is ping-pong ball

gb is golf ball

Multiplying each side by 2,

(mass of ppb) (speed of ppb)² = (mass of gb) (speed of gb)²

Divide each side by (mass of gb) and by (speed of ppb)²:

(mass of ppb)/(mass of gb)  =  (speed of gb)²/(speed of ppb)²

Take square root of each side,

√ (ratio of their masses)  =  ( 1 / ratio of their speeds)²

If their kinetic energies are equal, then the product of each mass and its speed² must be the same number.

If one ball has less mass than the other one, then the speed² of the lighter one must be greater than the speed² of the heavier one, in order to keep the products equal.

Thus, the pingpong ball is moving faster than the golf ball.

The given question is incomplete. The complete question is 'A. less than golf ball B. same as golf ball C. more than golf ball D. impossible to know'

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Important Formulas:

[tex]v=\lambda f[/tex]

velocity(measured in m/s) = wavelength(measured in meters) * frequency(measured in hertz)

[tex]T=\dfrac{1}{f}[/tex]

period(measured in seconds) = 1 / frequency(measured in hertz)

__________________________________________________________

Given:

[tex]v=33m/s[/tex]

[tex]f=11Hz[/tex]

[tex]\lambda=?[/tex]

[tex]T=?[/tex]

__________________________________________________________

Rearrange formula for velocity to make wavelength the subject:

[tex]v=\lambda f[/tex]

[tex]\dfrac{v}{f} =\dfrac{\lambda f}{f}[/tex]

[tex]\lambda=\dfrac{v}{f}[/tex]

__________________________________________________________

Finding wavelength:

[tex]\lambda=\dfrac{v}{f}[/tex]

[tex]\lambda=\dfrac{33}{11}[/tex]

[tex]\lambda=3m[/tex]

__________________________________________________________

Finding period:

[tex]T=\dfrac{1}{f}[/tex]

[tex]T=\dfrac{1}{11}[/tex]

[tex]T=0.09[/tex]

__________________________________________________________

Answer:

[tex]\boxed{\lambda=3 \texttt{ meters}}\\\boxed{T=0.09 \texttt{ seconds}}[/tex]

The cable can withstand a tensile stress of up to 3265 N.

It is appropriate to use the terms "push" or "pull" to describe a force at this moment. A power that something "contains" or "has in it" does not exist. A force is exerted on one item by another. The definition of a force includes both living and non-living things.

Here, T is the cable's tension force, m is the elevator's mass, g is gravity's acceleration (9.81 m/s2), and an is the elevator's upward acceleration.

The elevator's net force is supplied by:

Fnet = Fg + Fa

The sources of the gravitational pull are:

Fg = m * g

 = 250.0 kg * 9.81 m/s²

 = 2452.5 N

The force due to the elevator's acceleration is given by:

Fa = m * a

 = 250.0 kg * 3.25 m/s²

 = 812.5 N

The net force on the elevator is therefore:

Fnet = Fg + Fa

    = 2452.5 N + 812.5 N

    = 3265 N

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Although the electric potential due to the charges in that position is non-zero, the electric field due to the charges in that position is zero. If the charges are positive, depending on the charges, the potential has two positive contributions or two negative contributions.

What is electric field ?

According to mathematics, the electric field is described as a vector field that may be connected to each point in space and represents the force per unit charge that is applied to a positive test charge that is at rest at that location. Either the electric charge or time-varying magnetic fields can produce an electric field.

What is electric potential?

Between two points in an electric field, there is a difference in potential energy per unit charge, which is known as the electric potential or voltage. The amount of work required to move a unit positive charge from infinity to a specific point in an electric field without accelerating is known as the electric potential (or potential).

Although the electric potential due to the charges at that same position is non-zero, the electric field due to the charges at that same point is zero. If the charges are positive, the potential either has two positive contributions or two negative contributions, depending on the charges.

Therefore, The electric field could have a nonzero value in a point that has zero electric potential was mentioned above.

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When we try to calculate how much electric field passes through the surface, we make use of the: In the center of a uniformly charged ring, there is no electric field.

How does the direction of a surface impact the flow of electricity?

When a surface is perpendicular to the field (right panel), no field lines intersect it and there is no electric flux through it. The flux through the surface is between zero and the maximum value if the surface is rotated with respect to the electric field.

The electric flux through a surface only depends on the amount of charge contained by the surface, according to the electrostatics principle known as Gauss's theorem. It is independent of the size and contour of the surface. As a result, for all figures, the electric flux across the surface is the same.

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Answer:

60m/s

Explanation:

Whenever two objects are moving in opposite direction the relative speed is obtained by adding the speeds of the two objects.

Here the two vehicles are moving with speed 20m/s and 40m/s .

So the relative speed of the car relative to that of the truck will be,

(40 + 20 ) m/s

60m/s

hope this helps!

Answer:

Below

Explanation:

All of the Kinetic energy ( 1/2 mv^2) will be converted to Gravitational Potential Energy ( mgh)  ....so

1/2 m v^2   = mgh     divide both sides of the equation by 'm'

1/2 v^2 = gh                ( not that the mass of the jumper is irrelevant !)

(1/2 v^2 ) /g  = h

(1/2) (9.8 m/s)^2  / (9.8 m/s^2 ) =   4.9 m

The required magnitude of electric field from a tiny object is calculated to be -18.36× 10⁴ c.

The object carries a charge (q) of -16 nc.

q = - 16 × 10⁻⁹ c

The distance (d) from the charge is given as 2.8 cm.

d = 2.8 cm = 2.8 × 10⁻² m

The expression for calculating electric field is known to be,

E = kq/d²

where,

k is electrostatic constant (9× 10⁹N/m²c²)

q is charge

d is distance

When we enter the values into the formula,

E = kq/d² = (9 × 10⁹ × - 16 × 10⁻⁹)/(2.8 × 10⁻²)² = (-16×9× 10⁴)/(2.8 × 2.8) = -18.36× 10⁴ c

Thus, the required electric field is calculated to be -18.36× 10⁴ c.

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When the pendulum is brought back at an angle of 13°, there is a about 1.67 N restoring force on it.

A simple pendulum's restoring force is directed towards the mean position when it moves in a simple harmonic motion (lowest point). Here, the force of gravity acts as the restoring force at the centre of mass of the bob.

f_restoring = -m * g * sin(θ)

Where:

m = 7.4 kg (mass of the pendulum), g = 9.8 m/s^2 (acceleration due to gravity), θ = 13° (angle of displacement)

Converting the angle to radians:

θ = 13° * (π / 180) = 0.226 rad

Substituting the values into the equation:

f_restoring = -7.4 kg * 9.8 m/s^2 * sin(0.226 rad) = -7.4 kg * 9.8 m/s^2 * 0.226 = -1.67 N

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The amount of potential energy that converted into thermal energy is  468 kJ.

Energy, which is observable in the execution of labor as well as in the form of heat and light, is the quantitative quality that is transferred to a body or to a physical system in physics.

Energy is a preserved resource, energy can only be transformed from one form to another and cannot be created or destroyed.

Hence, form conservation of energy;

the amount of potential energy that converted into thermal energy =

Initial potential energy - final kinetic energy

= 1500 × 9.8 × 135  - 1/2×1500×45²

=  465750 Joule

= 468 kJ

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There are main potential reason Genetic factors for the rise in the frequency of low birth weight babies in the United States, but it is not accurate to say that any one particular reason is not a potential cause.

Some of the most commonly cited factors that can contribute to low birth weight include maternal smoking, poor maternal nutrition, lack of access to prenatal care, maternal stress, and medical conditions such as diabetes or high blood pressure. Additionally, environmental factors such as air pollution, exposure to toxins, and social determinants of health, such as poverty and lack of education, can also play a role.

It is important to note that the causes of low birth weight are often complex and multifactorial, and can vary from person to person and from pregnancy to pregnancy. In order to address this issue, it is important to consider a comprehensive and individualized approach that addresses the multiple factors that can contribute to low birth weight.

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The complete question is

In the United States, which is NOT a potential reason for the rise in the frequency of low-birthweight babies?

A. Genetic factors