I need help in this please

1. The forces acting on the block while it is hanging freely are gravitational force and tension force.

2. The forces acting on the block while placed on the ramp with the spring scale are:

3. The magnitude of the normal force acting on the block when it is resting on a flat surface is equal to the force of gravity acting on the block, or m * g.

1. The forces acting on the block when it is hanging freely from the spring scale are:

The net force on the block is zero, as the block is in static equilibrium, meaning that the sum of all forces acting on the block is equal to zero.

The magnitude of the force of gravity acting on the block can be calculated using the formula:

F_gravity = m * g

where m is the mass of the block and g is the acceleration due to gravity (approximately 9.8 m/s^2).

The magnitude of the tension force acting on the block is equal to the reading on the spring scale, as the scale measures the tension in the string to which the block is attached.

2. The forces acting on the block when it is placed on the ramp and held in place by the spring scale are:

The net force acting on the block is equal to the force of gravity minus the normal force, as the ramp is a frictionless surface and there is no friction acting on the block. This net force will cause the block to accelerate down the ramp.

The magnitude of the normal force acting on the block can be calculated using the formula:

F_normal = m * g * cos(θ)

where θ is the angle of the ramp with respect to the horizontal.

3. The magnitude of the normal force acting on the block when it is resting on a flat surface is equal to the force of gravity acting on the block, or m * g.

As the angle of the ramp increases, the normal force acting on the block decreases. This is because the component of the force of gravity acting perpendicular to the ramp (the component responsible for the normal force) decreases as the angle of the ramp increases. The decrease in the normal force leads to an increase in the net force acting on the block, causing it to accelerate down the ramp.

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According to the laws of thermodynamics, all energy transformations are inefficient because every reaction loses some energy to the surroundings as heat

The second law of thermodynamics states that entropy in a system always has a tendency to rise. It claims that because some energy is constantly lost as heat with each energy transfer, no energy transfer mechanism is ideal. The system's entropy rises as a result of the energy wasted. Due to this, only 10% of the energy from one tropic level gets transferred to the next, with the remaining 90% being wasted as heat.

According to the second rule of thermodynamics, some energy is transferred as heat. Numerous biological processes include this ineffective energy transfer.

This indicates that part of the input energy gets transformed into a highly disordered form of energy when energy is transformed into a different form.

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Electrons in a polar covalent bond are moved towards the more electronegative atom; consequently, the atom with the partial negative charge is the more electronegative atom. The bigger the electronegativity difference, the more polarized the electron distribution and the larger the atoms' partial charges.

The electronegativities of the elements can be used to forecast the sort of bond that will form between two elements. Large variances in electronegativity produce ionic bonds, whereas lesser differences produce covalent bonds. A formal charge and electronegativity criterion can be used to assess the relative contribution of non-equivalent resonance structures. Negative formal charge should preferentially dwell on more electronegative atoms, whereas positive formal charge is more easily carried by fewer electronegative atoms. The capacity of an atom to attract shared electrons in a covalent connection is referred to as electronegativity. The greater the electronegativity value, the more strongly that element draws the shared electrons.

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It is made up of three pieces that are closely packed together. Particles from one of outside parts are pumped all around circuit onto the second outer layer.

Because of this, the capacitor is occasionally referred to as the capacitor. A passive element is known as a capacitor because it can store more electric power than a comparable element when employed as an insulator and insulated conductor.

The capacitor symbol must show the construction of the capacitor as two lines, either flat and curved, close but not touching.

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The current through each bulb is 0.15A.

D)

V = Voltage across each bulb = 120 Volts

i400 = current in 400 ohm resistor = V/R = 120/400 = 0.3 A

i800 = current in 800 ohm resistor = V/R = 120/800 = 0.15 A

E)

P400 = V2/R400 = 1202/400 = 36 Watt

P800 = V2/R800 = 1202/800 = 18 Watt

F)

Ptotal = 36 + 18 = 54 Watt

Current refers to the flow of electric charge through a conducting medium. It is defined as the amount of charge that passes through a given cross-sectional area per unit of time. The SI unit of current is the ampere (A), which is defined as the flow of one coulomb of electric charge per second.

In an electric circuit, the current flows from a higher potential to a lower potential, and the direction of the current is taken as the direction in which positive charges would flow. In DC, the current flows in one direction only, while in AC, the current changes direction periodically. The magnitude of the current depends on the potential difference across the circuit and the resistance of the circuit.

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Complete Question:

Two light bulbs have resistances of 400 Ω and 800 Ω.

D). the two light bulbs are now connected in parallel across the 120- v line. find the current through each bulb.

E). Find the power dissipated in each bulb.

F). Find the total power dissipated in both bulbs.

Newton’s universal law of gravitation: F = Gm1m2/r2,Explanation: To understand why the value of g is so location dependent, we will use the two equations above to derive an equation for the value of g.

First, both expressions for the force of gravity are set equal to each other.Now observe that the mass of the object - m - is present on both sides of the equal sign.

Thus, m can be cancelled from the equation. This leaves us with an equation for the acceleration of gravity. F = Gm1m2/r2,

The above equation demonstrates that the acceleration of gravity is dependent upon the mass of the earth (approx. 5.98x1024 kg) and the distance (d) that an object is from the centre of the earth.

If the value 6.38x106 m (a typical earth radius value) is used for the distance from Earth's centre, then g will be calculated to be 9.8 m/s2. And of course, the value of g will change as an object is moved further from Earth's centre.

For instance, if an object were moved to a location that is two earth-radii from the center of the earth - that is, two times 6.38x106 m - then a significantly different value of g will be found.

Therefore,  at twice the distance from the centre of the earth, the value of g becomes 2.45 m/s2.

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The quantity directly related to the tendency of an object to maintain its state of motion is called "inertia."

The propensity of an object to continue moving at a steady speed or to remain at rest is described by the principle of inertia. So, whether it is a moving body or something resting on a table, it is a measurement of an object's resistance to changing its condition. It takes more effort to change an object's condition from rest or constant velocity if it has higher inertia. Consequently, lighter objects are in states that are simpler to modify.

The fact that friction exists is one factor that may make the "constant velocity" part seem counterintuitive. The friction of the turf causes a ball to bounce and eventually roll to a stop when you kick it down a field. The ball would, however, continue moving at a steady speed indefinitely if the playing surface could be made frictionless, barring some external force. It goes without saying that this situation would also alter how baseball games are played, as well as every other aspect of life on Earth.

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Experiment demonstrates second law of motion, where acceleration is directly proportional to force and inversely proportional to object's mass.

The second law of motion states that the acceleration of an object is directly proportional to the force applied to it and inversely proportional to its mass. In an experiment where a single fixed mass is used, the second law is demonstrated by the acceleration being proportional to the force applied to the object. As the force acting on the object is increased, the acceleration also increases proportionally. This is because the mass remains constant and the force acting on the object is the net force, which is the sum of all the forces acting on it.

Furthermore, the experiment also shows that the motion of the object stops when the force acting on it stops, and the application of a constant force causes the object to acquire a constant speed. This is because, according to the second law, the object will continue to move with a constant velocity when there is no net force acting on it.

Therefore, the experiment with a single fixed mass is an excellent way to demonstrate the second law of motion, which states that the acceleration is directly proportional to the force applied and inversely proportional to the mass of the object.

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The resolution limit of an optical system depends on both (a) The wavelength of light and (b) The diameter of the aperture. These two factors determine the diffraction limit, which is the smallest distance between two points that can be resolved by the optical system.

The wavelength of light affects the resolution limit because shorter wavelengths are able to resolve smaller details than longer wavelengths. The diameter of the aperture also affects the resolution limit because a larger aperture allows for more light to enter the system, which can improve the resolution.

The distance to the object being viewed (option c) and the distance from the aperture to the light detectors (option d) do not affect the resolution limit of an optical system. These factors may affect the overall image quality, but they do not determine the smallest distance between two points that can be resolved by the system.

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Answer:

As the Earth rotates, the Moon rises just as the Sun sets, but just on that one day of the month. In the days before a full Moon, if you look in the eastern sky, you can find the almost full Moon rising before the sun sets. We can see the moon during the day for the same reason we see the moon at night. The surface of the moon is reflecting the sun's light into our eyes

Explanation:

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A dead battery is attached to a battery charger, which maintains the voltage across the battery terminals at 12 volts while delivering a current of 6.0 a for 5.0 hours. The battery receives 1.3×10⁶J of energy.

P=[tex]\frac{energy}{t}[/tex]= i V =6.0A×12V=72.0W

Energy = Pt=(72.0W)(5.0h)[tex](\frac{3600s}{h} )[/tex]=1.296×10⁶J

Energy =1.3×10⁶J

Voltage, also known as electric potential difference, is a measure of the electrical potential energy per unit charge that exists between two points in an electrical circuit. It is expressed in volts (V). Voltage is responsible for the movement of electric charge through a circuit and is a key parameter in the operation of electrical devices.

In a circuit, the voltage can be provided by a battery, generator, or another electrical source. The voltage of a circuit is determined by the difference in electrical potential between the positive and negative terminals of the source. The greater the potential difference, the greater the voltage.

Voltage can be increased or decreased through the use of transformers or voltage regulators, which are important components in many electrical systems. The measurement of voltage is commonly performed using a voltmeter, which can be either analog or digital.

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Two stars are of equal luminosity. Star A is 3 times as far from you as star B. Star A appears the same brightness as star B.

The amount of energy that a star or other astronomical object emits is measured by its luminosity, which is typically expressed in terms of brightness. It depends on the star's surface area, temperature, and proximity to the observer. The evolution of a star and its ultimate fate are greatly influenced by its luminosity.

Two stars are therefore equally bright. Star A is three times farther away than star B. The brightness of star A and star B are comparable.

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The amount of charge built up on your fingertip is approximately 10.08 x 10^-5 C.

The spark length of 2 cm is equal to the breakdown field strength in air, so the electric field strength between your fingertip and the doorknob is 3 x 10^6 N/C.

The electric potential difference between the two points is given by the equation:

V = Ed

Where V is the potential difference, E is the electric field strength, and d is the distance between the two points.

In this case, d is equal to 2 cm, so we can calculate the potential difference:

V = (3 x 10^6 N/C) x (2 cm) = 6 x 10^6 N m/C = 6 x 10^6 V

Next, we can calculate the charge q on your fingertip using the formula:

q = CV

Where C is the capacitance of your fingertip.

The capacitance of a sphere is given by the formula:

C = 4πε_0r

Where C is the capacitance, ε_0 is the permittivity of free space, and r is the radius of the sphere.

The diameter of your fingertip is 1.59 cm, so the radius is 0.795 cm. Plugging these values into the formula for capacitance, we get:

C = 4πε_0 * 0.795 cm = 4π * 8.85 x 10^-12 * 0.795 cm = 1.68 x 10^-11 F

Finally, we can calculate the charge on your fingertip by plugging in the values for q and C into the equation:

q = C x V = 1.68 x 10^-11 F x 6 x 10^6 V = 10.08 x 10^-5 C

So the amount of charge built up on your fingertip is approximately 10.08 x 10^-5 C.

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The formula for gravitational force is F=GMm/r2. The force of gravity will weaken as the Earth's radius (r) increases, which also affects your weight.

Similar to how your weight would grow if the Earth's radius (r) decreased.

The link between the mass, radius, and acceleration brought on by gravity at the surface of several planets is what this problem is about. Because of this knowledge, we will now examine Newton's law of universal gravitation. And we have a formula we can employ in this situation. The acceleration brought on by gravity on a planet's surface is known as g, and it is equal to capital G multiplied by m over r squared, where m is the mass, r is the radius, and capital G is the universal gravitational constant.

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The moon will not appear in the same position at the same time the next day, due to the Earth's rotation and the moon's motion in its orbit around the Earth.

The position of the moon in the sky changes due to the rotation of the Earth on its axis, as well as the moon's own motion in its orbit around the Earth. Therefore, if you see the moon directly above a tree from your bedroom window one day, the moon will not appear in the same position at the same time the next day. The time it takes for the moon to return to the same position in the sky is approximately 24 hours and 50 minutes, which is known as a lunar day. This is longer than a solar day (which is 24 hours), because the moon is also moving in its orbit around the Earth, and therefore has to move slightly further in the sky to return to the same position relative to the Sun. So, the moon will appear in a slightly different position in the sky relative to the tree each day, and it will also rise and set at slightly different times each day. The exact amount of change will depend on factors such as the time of year and the location of the observer.

In summary, the moon will not appear in the same position at the same time the next day, due to the Earth's rotation and the moon's motion in its orbit around the Earth.

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The instantaneous acceleration of the mass when it is raised 6.30 cm and compresses the spring 2.50 cm is 16.26 m/s^2.

To solve this problem, we can use the equation for the force exerted by a spring:

F = -kx

When the mass is suspended at rest from the spring, the force exerted by the spring balances the weight of the mass, so we can write:

kx = mg

Solving for the spring constant, we get:

k = mg / x

Substituting the given values, we have:

k = (0.106 kg)(9.81 m/s^2) / 0.0380 m = 27.36 N/m

When the mass is raised 6.30 cm, the displacement of the spring is x = -0.0250 m (since the spring is compressed by 2.50 cm). The force exerted by the spring is:

F = -kx = -(27.36 N/m)(-0.0250 m) = 0.684 N

By Newton's second law, the net force on the object is:

Fnet = ma

where a is the instantaneous acceleration of the object.

The net force is the sum of the force exerted by the spring and the weight of the object:

Fnet = F + mg = 0.6875 N + (0.106 kg)(9.81 m/s^2) = 1.7239 N

Solving for the acceleration, we get:

a = Fnet / m = 1.7239 N / 0.106 kg = 16.2632 m/s^2

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When dealing with an electrical emergency involving a downed power line, it is important to follow certain safety precautions to avoid injury or further damage.

First, stay at least 10 meters (around 33 feet) away from the downed power line and any objects that it may be touching, as they could potentially be electrified.

Next, call 911 to report the downed power line and warn others in the area to stay away.

Do not attempt to move the power line or any objects it may be touching, as this could result in serious injury or death. Wait for emergency responders to arrive and follow their instructions. Remember, safety should always be the top priority in any electrical emergency.

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At 3.7s the horizontal distance that the stuntwoman ought to have put the foam mats that would cushion her fall (in relation to where the helicopter will be when she plummets) is 55.5m.

The distance between initial position of the woman and ground, y0 = 30.0 m

The horizontal velocity, vx = 15.0 m/s

The vertical velocity, vy = 10.0 m/s    

Using the kinematic equation, we have

y-[tex]y_{0}[/tex] = [tex]v_{y}[/tex]t - (1/2)g[tex]t^{2}[/tex]

-(30.0 m) = (10.0 m/s)t-(1/2)(9.8 [tex]m/s^{2} t^{2}[/tex]

(4.9)[tex]t^{2}[/tex]-(10.0)t-30.0 = 0

Solving the above quadratic equation, we get   t = 3.7 s

Therefore, the horizontal distance is   R = (vx)(t)

R =   (15.0 m/s)(3.69 s)

R =     = 55.5 m

Hence 55.5m is the horizontal distance and the image shows the graph  of her movements for x-, y-, vx-, and vy-time.

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The complete question is :

An image Stuntwoman descends from a helicopter that is 30.0 metres above the ground and travelling at a steady speed of 10.0 metres per second up and 15.0 metres per second down, all in the direction of the south. Neglect air resistance. (A) Where should the stuntwoman have set the foam mats to cushion her fall (in relation to where the helicopter will be when she drops)? (B) Create graphs of her movements for x-, y-, vx-, and vy-time.

Force applied by a chain passing over a) is 854 N and force is required if the chain shifts to a 8.38 cm is 869N.

A) The expression for force is product of force and distance of force from the axis of rotation,

τ = r x F

Here sum of clock wise moments are negative and sum of anticlockwise moments are positive,

τ = r x Fa

τnet = r x Fa - R x F

Torque is product of inertia and angular acceleration,

I∝ = r x Fa - R x F

[tex]F_a = \frac{I\alpha + R*F_r_e_s}{r}[/tex]

Moment of inertia of wheel is,

I = MR²

= (0.758)(0.746)

= 0.565 kg.m³

Fa = 854 N

B) using the equation,

[tex]F_a = \frac{I\alpha + R*F_r_e_s}{r}[/tex]

= [tex]\frac{(0.565) (2.6) + (95.7)(0.746) }{0.0838}[/tex]

= 869N

Newton's alternate law establishes that the net necklace acting on a body equals the product of the body's moment of indolence and its angular acceleration,

The moment of indolence serves as a measure of the body's resistance to a change in its rotational state of stir.

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Answer:

it would take approximately 1.7 seconds for Fluffy the Cat to fall from a 15 meter tall tree.

Explanation:

To calculate the time it takes for an object to fall, you can use the following formula:

t = sqrt(2d / g)

where:

t is the time in seconds

d is the distance fallen in meters

g is the acceleration due to gravity (approximately 9.8 m/s^2 on the surface of the Earth)

So, substituting in the values for d (15 meters) and g (9.8 m/s^2), we get:

t = sqrt(2 * 15 / 9.8)

t = sqrt(30 / 9.8)

t = sqrt(3.06122448979591836734693877551)

t ≈ 1.744823934831724823036837018032 seconds

A window pane would gain heat the fastest

We have to note that the heat capacity of the material would be very important to know the object that would be able to gain the heat fast. If the object is gaining the heat fast, it means that it has a low specific heat capacity.

Again the window pane does have a low specific heat capacity and is able to absorb heat and the temperature would rise faster causing the object to gain heat the fastest as we can see from the explanation here.

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Double double toil and trouble;

Fire burn and couldron bubble. is by the struggle a lot

option A  

The phrases that the three witches in Macbeth used to inform the audience of Macbeth's actions show that Macbeth would suffer greatly. The three witches foretold Macbeth's ascension to the throne. Additionally, they told him that his reign could not be passed on to his descendants. Instead, the realm would pass to Banquo's sons. The predictions a encouraged Macbeth to kill his t friends, including Duncan, in order to fulfill have excessive desires, which Lady Macbeth pushed him to do. As a result, it to clear from the phrases that the three witches in Macbeth used to the  inform the audience about Macbeth's activities that Macbeth would face many difficulties.

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The complete question follows

Read the following lines that a group of witches say in Macbeth .What do these lines let the audience know that Macbeth is going to do?

Double double toil and trouble;

Fire burn and couldron bubble.

A) struggle a lot

B) catch fire

C) meet someone who looks like him

D) buy a cauldron

Answer:

I can tell you that in the realm of physics and philosophy, the existence of things that don't interact with their environment is a concept that has been debated.

In physics, there are concepts like dark matter and dark energy, which are believed to exist based on their gravitational effects on visible matter, but they do not interact with light or other forms of electromagnetic radiation, making them difficult to detect directly.

In philosophy, there are debates about the existence of things like abstract objects, such as numbers or concepts, which are not physical and do not interact with the physical world, but are thought to exist in a different way.

Ultimately, whether or not one accepts the existence of things that don't interact is a matter of personal belief or theoretical framework. Scientifically, the existence of such things can be postulated based on their effects on other things that can be detected, but their ultimate existence may be impossible to prove conclusively.

When a star is rising straight up in the east, it will be high in the south when it is at its peak point over the horizon.

In both hemispheres, the star ascends in the east and sets in the west. This results from the rotation of the earth. Also, they circle the north celestial pole in a clockwise way whereas the south celestial pole is in a counterclockwise direction.

Nonetheless, the south celestial pole will be visible above the southern horizon at an angle proportional to your latitude. Toward the northern sky, rising stars in the east will go higher and to the left. As you travel farther south, the celestial equator will likewise pass across the northern sky, getting progressively lower.

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Answer:

the average speed of the airplane is 560 miles per hour.

Explanation:

To calculate the average speed of an airplane, you need to divide the total distance it travels by the total time it takes to travel that distance.

In this case, the total distance is 1400 miles and the total time is 2 and a half hours, so we can calculate the average speed as follows:

Average Speed = Total Distance / Total Time

Average Speed = 1400 miles / 2.5 hours

Average Speed = 560 miles per hour

A circuit in which two light bulbs with equal resistance values are connected in parallel. if one of the light bulbs burns out, By factor (2) is the brightness of the other bulb multiplied.

When two identical light bulbs are connected in parallel, the total resistance of the circuit is half of the resistance of each individual bulb. If one of the bulbs burns out, the total resistance of the circuit doubles, which means that the current through the remaining bulb is halved. The brightness of a light bulb is directly proportional to the current passing through it, so the brightness of the remaining bulb will be reduced by a factor of 2.

I = V/R

If both bulbs have the same resistance R and the same voltage V is applied to each, then the current passing through each bulb is:

I = V/R

When both bulbs are connected in parallel, the total current in the circuit is the sum of the currents through each bulb:

[tex]I_t_o_t_a_l = I_1 + I_2[/tex]

here,

[tex]I_1[/tex] & [tex]I_2[/tex] are currents passing by each bulb.

Reserving Ohm's law:-

[tex]I_t_o_t_a_l = V/R + V/R[/tex]

Simplifying:-

[tex]I_t_o_t_a_l = 2V/R[/tex]

The power P dissipated by each bulb is given by:

[tex]P = IV = V^2/R[/tex]

So the brightness of each bulb is proportional to [tex]V^2[/tex]. If one bulb burns out, the voltage across the remaining bulb remains the same, but the resistance of the circuit doubles, so the current passing through the remaining bulb is halved. This means that the power dissipated by the remaining bulb is reduced by a factor of 2, which corresponds to a reduction in brightness by the same factor. Therefore, the brightness of the remaining bulb is reduced by a factor of 2.

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The correct answer is A.According to modern psychologists, consciousness is a brain phenomenon.

This view contrasts with Descartes’ dualism, which argued that the mind and the body are separate entities and that the mind can exist independently of the body. Thus, according to Descartes, the mind is not necessarily dependent on the brain. However, contemporary psychologists believe that the mind and the brain are closely intertwined and that consciousness is a product of brain activity.Contemporary psychologists use a variety of approaches to explain and understand behavior, including cognitive, evolutionary, social, physiological, and cultural approaches. These approaches often overlap and combine to provide a comprehensive understanding of human behavior.

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The resultant pulse's amplitude is the sum of the amplitudes of the two original pulses. This might be two crests or two troughs colliding.

When two waves superimpose in opposite phase, the amplitude of the consequent is equal to the difference in amplitude of the component waves, resulting in the least amount of light intensity; this is known as destructive interference.

When two pulses travelling in opposite directions along a stretched string collide. Because both pulses cause the string to move higher as they travel, the net displacement of the string at that location is equal to the total of the pulse amplitudes. Because the two waves are travelling through the same medium, they have the same speed. The superposition total wave travels in the same direction and at the same speed as the two component waves, but its local amplitude is determined by whether the two individual waves have the same or opposite phase.

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Pressure between the carton and the floor will be 1871 N/m².

Pressure is defined as the force applied perpendicular to an object's surface per unit area over which that force is distributed. Gauge pressure is the pressure in relation to the surrounding atmosphere. Pressure is expressed using a variety of units.

Given that a carton of paper has a mass of 22.7 kg. The area of the bottom is 0.119 m².

The pressure will be calculated as:-

P = Force / Area

Force =  Weight = mg

P = mg / A

P = ( 22.7 x 9.81 ) / 0.119

P = 1871 M / m²

Hence, the pressure will be 1871 N / m².

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