Predict the force when the wore carries no current

The statement is false. When a fluid is subjected to a steady shear stress, it will continue to undergo deformation, and no equilibrium state will be reached.

When a fluid is subjected to a steady shear stress, it will continue to undergo deformation, and no equilibrium state will be reached. A shear stress is a force per unit area that causes one layer of fluid to move relative to another layer. In other words, it is a stress that causes deformation of the fluid.

When a fluid is subjected to a steady shear stress, it will exhibit a linear relationship between the shear stress and the rate of deformation, known as Newtonian behavior. The proportionality constant between the two is known as the viscosity of the fluid.

If the shear stress is removed, the fluid will return to its original shape and size, and no permanent deformation will occur. However, if the shear stress is maintained, the fluid will continue to deform, and the deformation will increase over time.

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A paper airplane flies through the air 26 meters towards the west during a 20 second period.

Hence, the correct option is A.

To calculate the average velocity of the paper airplane, we need to use the formula

Average velocity = displacement / time

Where displacement is the change in position of the airplane and time is the duration of the motion.

In this case, the displacement of the airplane is 26 meters towards the west, and the time it took to travel that distance is 20 seconds. So we can put these values into the formula and get

Average velocity = 26 meters / 20 seconds

Average velocity = 1.3 meters per second

The airplane flew towards the west, so the average velocity is 1.3 m/s westward.

Hence, the correct option is A.

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The moment of a force is a measure of its tendency to cause a body to rotate about a specific point or axis.

Matter has an attribute called inertia that makes it resist changes in motion's direction or velocity. Newton's first law of motion states that unless an outside force acts on an item, it will continue to move at a given velocity. The characteristic of the matter that causes this law to hold true is inertia.

A body in motion will tend to stay in motion unless and until an external force is applied to it, while a body at rest will tend to stay at rest.

When a bus stops abruptly, as an illustration of inertia, passengers slump forward. The lower body is affected when a bus driver abruptly applies the brakes.

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The low pressure atmosphere that was denser in the past and is currently made up of mostly carbon dioxide (95%) and nitrogen is known as the Martian atmosphere.

The atmosphere of Mars is considerably thinner than that of Earth due to its lower gravitational pull and lack of a strong magnetic field, which has allowed for the loss of lighter gases such as hydrogen and helium over time. However, the presence of carbon dioxide in the Martian atmosphere has played a significant role in the planet's climate history, as it is a potent greenhouse gas that can trap heat and warm the planet. This has led to periods of warming and cooling on Mars, with evidence of past ice ages and the possibility of liquid water on the surface. Understanding the Martian atmosphere and its composition is crucial for future exploration and potential colonization of the planet.

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Pure rotation occurs when a force is applied at a single point on an object, known as the pivot or axis of rotation. This force creates a torque that causes the object to rotate around the pivot without any translational motion.

Therefore, the kind of force that creates pure rotation is a torque force applied at a single point. There is only one point of contact involved in pure rotation, which is the pivot or axis of rotation.

A basic torque converter would have a torque multiplication ratio of about 2.5:1. The most crucial thing to remember is that all torque converters that are functioning properly increase torque while starting the initial acceleration.

The torque multiplier reaches its maximum when the vehicle initially starts to move. As speed increases, the torque multiplication decreases. As the impeller and turbine speeds approach one another, torque multiplication practically disappears.

The dimension of torque would be T2L2M, or force times distance. Despite the fact that these fundamental dimensions were the same as those used for energy and work, the official SI literature recommends using the unit newton-meter (Nm) and never the joule.

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The moon does get 1.4 mm closer to Earth each second as it "falls".

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According to the moment magnitude scale (M w), the amplitude of ground shaking during a magnitude 8 earthquake would be 1,000 times greater than a magnitude 5 earthquake.

The moment magnitude scale (M w) is a logarithmic scale used to measure the size of earthquakes in terms of the energy released. Each increase in magnitude represents a tenfold increase in amplitude of ground shaking, and a 32-fold increase in the energy released. Therefore, an earthquake with a magnitude of 8 would have an amplitude of ground shaking 1,000 times greater than an earthquake with a magnitude of 5.

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The angular speed of the pencil just before it hits the table is 2.19 rad/s.

When the pencil is released, it begins to rotate about the eraser end. The potential energy of the pencil is converted into kinetic energy of rotation as it falls. Because the pencil is treated as a uniform rod, we can use the formula for rotational kinetic energy:

where K is the kinetic energy of rotation, I is the moment of inertia, and w is the angular speed.

The moment of inertia of a uniform rod rotating about one end is given by:

where m is the mass of the rod and L is its length.

In this case, the length of the pencil is L = 15.7 cm = 0.157 m, and assuming a uniform density, the mass can be calculated from its length and diameter. Then, plugging in the values for I, K, and solving for w, we get:

Therefore, the angular speed of the pencil just before it hits the table is 2.19 rad/s.

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The current of the magnetic field must be flowing counterclockwise around the loop.

To determine the direction of the current, we can use the right-hand rule for the magnetic field around a current-carrying wire.

If you place your right hand around the wire with your thumb pointing in the direction of the current, the direction in which your fingers curl around the wire will be the direction of the magnetic field.

Since the magnetic field is coming out of the page toward you (as indicated by the circle-dot in the center of the loop), we can conclude that the current must be flowing counterclockwise around the loop.

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A bimetallic strip breaks a circuit when things heat up by bending due to the differential expansion of its two metals, causing a movable contact to move away from its resting position and break the circuit.

A bimetallic strip is a component that consists of two different metal strips bonded together. When heated, the two metals expand at different rates, causing the strip to bend. This bending action can be used to break a circuit.

One end of the bimetallic strip is connected to the circuit, while the other end is connected to a movable contact. When the strip is cool, the contact is in its resting position, allowing the circuit to be complete. However, when the strip is heated, it bends, causing the contact to move away from its resting position and break the circuit.

The degree of bending is determined by the difference in coefficients of thermal expansion between the two metals. The metal with the higher coefficient of thermal expansion will expand more when heated, causing the strip to bend in that direction.

This mechanism is commonly used in thermostats and other temperature control systems. For example, in an electric kettle, a bimetallic strip may be used to control the temperature of the water. When the water reaches boiling point, the strip bends and breaks the circuit, turning off the kettle.

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The statement is true. The motion of waves depends upon the source from which they were generated. Waves can be generated by a variety of sources such as wind, earthquakes, and tides.

The characteristics of the waves, such as their amplitude and frequency, are determined by the source of the waves. For example, waves generated by wind tend to have shorter wavelengths and higher frequencies compared to waves generated by earthquakes or tides. Additionally, the direction of the waves can also be influenced by the source of the waves. Overall, the motion of waves is dependent on the source from which they were generated, and understanding the source of the waves is important for predicting their behavior and potential impacts.

Vibrations in a transverse wave are parallel to the wave's motion direction. Vibrations in a longitudinal wave are perpendicular to the direction of wave motion.

The crest and trough of a wave are its components in a transverse wave. The area with the greatest displacement is the crest. While the displacement is at its lowest in the trough.

Compression and rarefaction are components of a wave in a longitudinal wave. The particles are quite near to one another during compression. The particles are close together in rarefaction.

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The maximum point of a transverse wave is called the crest. So, the statement is false.

Each particle oscillates about its mean position in a transverse wave. On both sides of the mean point, they reach extreme positions when oscillating. The highest point among these is known as the crest, and the lowest position as the trough.

Therefore,

The lowest point below the rest position to the displacement is called the trough of a transverse wave.

Whereas, the highest point of a transverse wave is called the crest.

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Find the frequency of the fundamental mode of transverse vibration of a wire of length 40cm and diameter 0.98mm with a 5kg body at one end, before and after total immersion in water.

The frequency of the fundamental mode of transverse vibration of a vertical wire of length 40cm and diameter of 0.98mm can be calculated using the formula f = (1/2L) x sqrt(Tension/mu), where L is the length of the wire, mu is the linear density of the wire, and Tension is the tension in the wire. The frequency before the body is immersed in water can be calculated by assuming the tension is equal to the weight of the body, which is 5 x 9.8 = 49 N. After the body is immersed in water, the frequency can be calculated by adjusting the linear density of the wire, since the buoyant force reduces the effective weight of the body.

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Even though the physical size of the capacitor doesn't change, the addition of a dielectric material increases the maximum operating voltage by increasing the capacitance and by reducing the risk of breakdown due to the higher breakdown voltage of the dielectric material.

A capacitor consists of two conductive plates separated by a dielectric material. When a voltage is applied to the capacitor, an electric field is established between the plates, causing charge to accumulate on the plates.

Dielectric materials are characterized by their ability to store electric charge within their structure. When a dielectric material is placed between the plates of a capacitor, it reduces the electric field strength between the plates, which in turn reduces the potential difference across the plates for a given amount of charge.

In addition to increasing the capacitance, a dielectric material also increases the maximum operating voltage of a capacitor by reducing the electric field strength at the surface of the conductive plates.

This is because dielectric materials have a higher breakdown voltage than air or a vacuum, meaning they can withstand higher electric field strengths before breaking down and becoming conductive.

This allows capacitors with dielectric materials to be operated at higher voltages without the risk of arcing or breakdown, which can damage or destroy the capacitor.

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If you were standing on a ladder three Earth radii from Earth's center, your weight would be one-ninth of its present value.

The weight of an object is proportional to the mass of the object and the gravitational force acting on it. The gravitational force is inversely proportional to the square of the distance between the objects. As you move away from Earth's center, the gravitational force acting on you decreases.

If you were three Earth radii from Earth's center, the distance between you and Earth's center would be three times greater than it is at the surface of the Earth. Therefore, the gravitational force acting on you would be one-ninth of the force acting on you at the surface of the Earth.

Since your weight is the product of your mass and the gravitational force acting on you, your weight would also be one-ninth of its value at the surface of the Earth.

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The amount of net torque about the pivot point when the meterstick is balanced is zero.

Torque is the rotational equivalent of force and is calculated by multiplying the force applied to an object by the distance from the pivot point. When a meterstick is balanced, it means that the torques acting on each side of the pivot point are equal and opposite, resulting in a net torque of zero.

This balance occurs when the sum of the clockwise torques is equal to the sum of the counterclockwise torques. In other words, the forces applied to the meterstick on both sides of the pivot point are balanced, creating a state of rotational equilibrium. As a result, the meterstick remains in a stable position without rotating.

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Doubling the frequency doubles the number of wave segments.

If the frequency of the shaking is doubled, the number of wave segments in the standing wave will also double. This is because the number of segments in a standing wave is directly proportional to the frequency of the wave. Therefore, a standing wave that originally had three segments would now have six segments when the frequency is doubled.

The wavelength of the new standing wave would be halved, as wavelength is inversely proportional to frequency. Therefore, if the frequency is doubled, the wavelength would be reduced to half of its original value. This means that the distance between two consecutive nodes (or antinodes) in the standing wave would also be halved. The amplitude of the standing wave would remain the same, as it is not affected by the frequency of the wave.

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The Doppler shift, also known as the Doppler effect, is a phenomenon where the frequency and wavelength of a wave (such as sound or light) change as the source of the wave and the observer move relative to each other.

When the source and the observer are moving closer together, the frequency increases and the wavelength decreases. Conversely, when they are moving away from each other, the frequency decreases and the wavelength increases.

The formula for the Doppler shift is: f' = f * (v + vo) / (v + vs)

where:
f' is the observed frequency,
f is the source frequency,
v is the speed of the wave in the medium,
vo is the speed of the observer (positive if moving toward the source, negative if moving away),
and vs is the speed of the source (positive if moving away from the observer, negative if moving toward).

This formula helps us calculate the change in frequency and wavelength experienced by the observer due to the relative motion between the source and the observer.

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A halo around the sun or moon is often an indication that cirrostratus clouds are present.

Cirrostratus clouds are high-level clouds that form above 20,000 feet (6,000 meters). They are composed of ice crystals and have a thin, often transparent appearance. When these clouds are present, they can create a halo effect around the sun or moon.

The halo is formed when light from the sun or moon is refracted, or bent, as it passes through the ice crystals in the cirrostratus clouds. This refraction causes the light to spread out and create a ring or halo-like appearance around the sun or moon.

The presence of a halo is often an indication of thin, high-level cloud cover, typically preceding an approaching warm front or an area of moisture. It can also be a sign of changing weather conditions.

It is worth noting that halos can also be formed by other cloud types, such as altostratus or thin, wispy cirrus clouds, depending on the specific atmospheric conditions.

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The ratio between the maximum and minimum sound intensities that produce a particular loudness varies depending on the individual's perception and the specific loudness level being discussed.

However, in general, the relationship between loudness and sound intensity is not linear but logarithmic. This means that as the sound intensity doubles, the perceived loudness increases by a constant amount. The ratio between the maximum and minimum sound intensities that produce a particular loudness is known as the loudness level or the decibel (dB) scale. For example, a sound with an intensity of [tex]10^{-12} W/m^2[/tex] is considered the threshold of human hearing and has a loudness level of 0 dB. A sound with an intensity of [tex]10^{-9} W/m^2[/tex] has a loudness level of 30 dB, which is 100 times louder than the threshold of human hearing.

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The interaction between two bottom strips when brought near each other is likely to be repulsive.

When two bottom (B) strips are brought near each other, they will likely repel each other. This is because the bottom strips are made of a material that has a negative charge, which means that they have an excess of electrons.

The excess of electrons causes a negative charge to build up on the surface of the strips. When two negatively charged surfaces are brought close together, they will repel each other due to the electrostatic force.

This repulsion can be observed as the strips push away from each other when brought near. It is important to note that this repulsion is not always consistent,

As factors such as the distance between the strips and the charge distribution on their surfaces can affect the strength of the interaction.

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The speed of sound in this solid metal is 3.73 x 10³ m/s.

Density of the solid metal, ρ = 7.2 x 10³ kg/m³

Young's modulus of the solid metal, Y = 10 x 10¹⁰ = 10¹¹ N/m²

The equation for speed of sound in the metal is given by,

v = √(Y/ρ)

Applying the values of Y and ρ,

v = √(10¹¹/7.2 x 10³)

v = √(0.1388 x 10⁸)

v = 3.73 x 10³ m/s

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 To answer this question, we need to use the formula for centripetal force:
F = mv^2/r
where F is the centripetal force, m is the mass of the truck, v is its speed, and r is the radius of the curve.
We can rearrange this formula to solve for v:
v = √(Fr/m)
We know that the mass of the truck is constant, so we can simplify this to:
v = √(F/r)

Now, we can compare the two curves. We know that the truck can go around the first curve with a maximum speed of 29.0 m/s, so we can use that to find the centripetal force:
F = mv^2/r = m(29.0 m/s)^2/150 m = 1340 mkg/s^2
Now, we can use this centripetal force to find the maximum speed for the second curve:
v = √(F/r) = √(1340 mkg/s^2 / 61.5 m) = 23.1 m/s
Therefore, the maximum speed that the truck can go around a curve with a radius of 61.5 m is 23.1 m/s.

In conclusion, the long answer is that we can use the formula for centripetal force and rearrange it to solve for the maximum speed of the truck. By knowing the maximum speed and radius of the first curve, we can find the centripetal force, which we can then use to find the maximum speed for the second curve.

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The Planck function provides the spectral distribution of the radiation emitted by a blackbody, while the Stefan-Boltzmann law gives the total amount of energy emitted by a blackbody as a function of its temperature.

The Planck function and the Stefan-Boltzmann law are related in the context of blackbody radiation. Here's a step-by-step explanation of their connection:
The Planck function, also known as the Planck radiation law, describes the electromagnetic radiation emitted by a blackbody as a function of its temperature and wavelength. It states that the amount of energy radiated per unit area per unit time is proportional to the fourth power of the absolute temperature and the frequency of the radiation.

The Stefan-Boltzmann law, on the other hand, relates the total energy radiated per unit area per unit time by a blackbody to its temperature. It states that the total amount of energy emitted per unit area per unit time is proportional to the fourth power of the absolute temperature.

1. Planck function: This function describes the spectral distribution of the intensity of blackbody radiation as a function of wavelength and temperature. Mathematically, it is represented by:

I(λ, T) = (2hc2/5) * (1/(e(hc/kT) - 1))

where I(λ, T) is the intensity, is the wavelength, T is the temperature, h is Planck's constant, c is the speed of light, and k is Boltzmann's constant.

2. Stefan-Boltzmann law: This law states that the total power emitted per unit area of a blackbody is proportional to the fourth power of its temperature.

P(T) = σ * T⁴

where P(T) is the power, T is the temperature and is the Stefan-Boltzmann constant.

3. Connecting Planck function and Stefan-Boltzmann law: To find the relationship between the two, integrate the Planck function over all wavelengths to obtain the total power emitted per unit area:

P(T) = ∫ I(λ, T) d (integrated over all wavelengths)

After performing this integration, you will find that:

P(T) = σ * T⁴

This result shows that the integrated Planck function gives us the Stefan-Boltzmann law, which relates the total power emitted by a blackbody to its temperature.

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Work done by the average normal force of contact between the boy's feet and the concrete is zero.

The average normal force of contact (N) between the boy's feet and the concrete did positive work on the boy, equal to the increase in the boy's kinetic energy.

At the moment the boy leaves the surface, the only force acting on him is his weight (mg) pointing downwards. As he rises, the normal force exerted by the concrete on his feet reduces the net force acting on him and causes him to decelerate. At the highest point of the motion, the normal force reduces to zero, and the boy momentarily comes to rest before falling back down.

The work done by the normal force is given by the product of the force and the displacement in the direction of the force. Since the normal force is always perpendicular to the displacement, it does no work on the boy during the upward motion. Therefore, the work done by the average normal force of contact between the boy's feet and the concrete is zero.

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Answer:

Increases

Explanation:

Opposite charges naturally want to go toward eachother (opposites attract) by moving them apart you are building that energy that will be used to pull them toward eachother, therefore increasing their potential.

The wire is approximately 9 feet long.

To find the length of the wire stretched from the top of an 8-foot pole to a bracket 5 feet from the base of the pole, we

can use the Pythagorean theorem. The theorem states that in a right-angled triangle, the square of the length of the

hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides.

Step 1: Identify the sides of the triangle. In this case, the 8-foot pole is on one side, and the 5-foot distance from the base

of the pole to the bracket is on the other side. The wire will be the hypotenuse of the right-angled triangle.

Step 2: Apply the Pythagorean theorem. Let's denote the length of the wire as "c". Then we have:

c² = 8² + 5²
c² = 64 + 25
c² = 89

Step 3: Solve for c (the length of the wire) by taking the square root of both sides:

c = √89
c ≈ 9.43

Step 4: Round to the nearest foot:

The length of the wire is approximately 9 feet.

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The tension in the clothesline is about 60.06 N on either side of the sheet. It is greater because the clothesline is at a small angle.

The tension in the clothesline on either side of the 0.75-kg sheet can be calculated using the principles of static equilibrium and trigonometry. Since the sheet is in equilibrium, the vertical and horizontal components of the tension force must balance the gravitational force acting on the sheet.
Let T be the tension in the clothesline on either side of the sheet, and θ be the angle between the clothesline and the horizontal (3.5 degrees in this case). The weight of the sheet (W) can be calculated using the equation W = mg, where m is the mass (0.75 kg) and g is the acceleration due to gravity (approximately 9.81 m/s²).
The vertical component of the tension ([tex]T_v[/tex]) can be expressed as [tex]T_v[/tex] = Tsinθ. Since there are two identical tension forces acting vertically, the sum of these vertical components must equal the weight of the sheet: 2Tsinθ = W.
Now, we can plug in the values and solve for T:
2Tsin(3.5) = 0.75 × 9.81
Tsin(3.5) = 3.67875
T = 3.67875 / sin(3.5) ≈ 60.06 N
The tension in the clothesline is about 60.06 N on either side of the sheet. This tension is much greater than the weight of the sheet (about 7.36 N) because the clothesline is at a small angle (3.5 degrees) with the horizontal, causing the tension force to be distributed mainly in the horizontal direction. The tension must be significantly higher to provide enough vertical force to support the weight of the sheet.

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The given statement: In compression molding of a disk between two plates, the force required to squeeze plates together decreases as time increases is FALSE because as time increases, the material in the mold becomes denser and harder, increasing the force required to compress it.

The force required to squeeze plates together in compression molding actually increases as time increases. This is because the material being molded undergoes a reduction in volume as it is compressed, which increases the force required to continue compressing it.

The force required may also increase due to factors such as material flow resistance, cooling of the material, and friction between the material and the mold surfaces.

In order to properly mold a material, it is important to carefully monitor and control the compression force and time to ensure that the material is adequately compressed without being overcompressed and damaging the mold or the material itself.

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The swimmer would take 258 seconds, or 4 minutes and 18 seconds, to cross the river.

To solve this problem, we can use vector addition to find the swimmer's resultant velocity.

(i) Along what direction must he strike?

Let's draw a diagram to represent the situation:

    A

   /|

  / |

 /  |

/   |

B----C

In this diagram, the river flows from point A to point B, and the swimmer wants to cross the river from point C to point B. Let's call the velocity of the river Vr = 5 km/h and the velocity of the swimmer Vs = 10 km/h. We want to find the direction the swimmer should strike to cross the river straight.

Since the swimmer wants to cross the river straight, he needs to swim in a direction perpendicular to the river's flow. This means that the angle between the swimmer's velocity and the river's velocity should be 90 degrees.

Using trigonometry, we can find that the angle between the swimmer's velocity and the direction perpendicular to the river's flow is:

theta = arctan(Vr / Vs)

= arctan(5 / 10)

= 26.57 degrees

Therefore, the swimmer should strike at an angle of 26.57 degrees to the direction perpendicular to the river's flow.

(ii) What should be his resultant velocity?

To find the swimmer's resultant velocity, we need to add his velocity to the velocity of the river. Since the swimmer is swimming at an angle of 26.57 degrees to the direction perpendicular to the river's flow, we need to use vector addition to find his resultant velocity:

     Vs

    /|

   / |

  /  |Vr

 /   |

B----C--->river flow

Using trigonometry, we can find that the magnitude of the swimmer's resultant velocity is:

V = sqrt(Vs^2 + Vr^2)

= sqrt(10^2 + 5^2)

= 11.18 km/h

To find the direction of the swimmer's resultant velocity, we can use the following formula:

theta = arctan(Vr / Vs)

= arctan(5 / 10)

= 26.57 degrees

Therefore, the swimmer's resultant velocity is 11.18 km/h at an angle of 26.57 degrees to the direction perpendicular to the river's flow.

(iii) How much time would he take?

To find the time the swimmer would take to cross the river, we can use the following formula:

time = distance / velocity

The distance the swimmer needs to cross the river is the width of the river, which is 800 m. The swimmer's velocity is 11.18 km/h, or 3.1 m/s.

time = 800 / 3.1

= 258 seconds

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