describe what effect the resistance of the connecting wires has on an oscillating lc circuit.
Answers
The effect the resistance of the connecting wires has on an oscillating lc circuit is a damping effect on an oscillating LC circuit.
The circuit gradually loses energy due to the resistance of the connecting wires, this causes the amplitude of the oscillations to decrease over time, resulting in a decay of the oscillations. The resistance of the connecting wires of an LC circuit causes damping effect on the oscillations. In an LC circuit, the inductor and capacitor are connected in parallel. When the switch is closed, the capacitor begins to charge, and the current flows through the inductor. When the capacitor is fully charged, the current stops flowing through the inductor, and the capacitor begins to discharge.
The current starts flowing through the inductor in the opposite direction.The current flowing through the circuit generates an electromagnetic field that stores energy in the inductor and capacitor. The energy stored in the capacitor and inductor is exchanged during the oscillations. The resistance of the connecting wires causes energy loss, and the amplitude of the oscillations decreases. As a result, the oscillations decay over time.
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Related Questions
2. CaCl2 (s) + 2H20 ---> Ca(OH)2 (aq) + 2HCl (g) + heat
Is it an endothermic reaction?
Answers
Answer:
no
Explanation:
Calcium chloride is a chemical compound made up of calcium ions and chlorine ions. ... Mixing calcium chloride with water is an exothermic reaction, which means that the combination of the two substances releases heat. Thus, when you add calcium chloride to water, the solution heats.
Which of the following units represent the largest amount of energy? A.Electron-volt B.Erg C.Joule D.Calorie
Answers
The unit that represents the largest amount of energy is the joule (J). The correct answer is option C.
A joule is a unit of energy that is equal to the work done when a force of one newton (N) is applied over a distance of one meter (m). One joule is equal to one watt (W) of power being used for one second.
In comparison, an electron-volt (eV) is a unit of energy equal to 1.602176634×10−19 J. An erg is a unit of energy equal to 10−7 J. A calorie (cal) is a unit of energy equal to 4.184 J.
Therefore, joules are the largest unit of energy when comparing these units of measure. The joule is also the unit of energy used in the International System of Units (SI).
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PLEASE HELP
Which of the following is a characteristic property of the alkaline earth
metals?
A. They are harder than alkali metals.
B. They are more reactive than alkali metals.
C. They all have 3 valence electrons.
D. They are all radioactive.
Answers
Answer:
It's D, they're all radioactive. This is due to the molecules that it is made up of
Answer:
the answer is A
Explanation:
I hope it helps you
A 90-meter train travels at a constant speed of 10 meters per second. How long will it take to cross a 0.06 bridge?
Answers
Answer:
The time taken for the train to cross the bridge is 9.01 s
Explanation:
Given;
length of the train, L₁ = 90 m
length of the bridge, L₂ = 0.06 m
speed of the train, v = 10 m/s
Total distance to be traveled, = L₁ + L₂
= 90 m + 0.06 m
= 90.06 m
Time of motion = Distance / speed
Time of motion = 90.06 / 10
Time of motion = 9.006 s ≅ 9.01 s
Therefore, the time taken for the train to cross the bridge is 9.01 s
1 pt
The first spacecraft which did not merely fly by a jovian (or giant) planet, but actually went into orbit around it for an extended period of time was -
Galileo
Pioneer 10
Voyager
Messenger
Answers
The first spacecraft which did not merely fly by a jovian (or giant) planet, but actually went into orbit around it for an extended period of time was Galileo.
What is Galileo?The Galileo mission was an American planetary probe that was designed to explore Jupiter and its moon system, as well as observe the Jovian system's dynamics, atmosphere, magnetosphere, and natural satellites. Galileo was launched by NASA's Space Shuttle Atlantis from Kennedy Space Center on October 18, 1989, on mission STS-34.
The probe's objective was to collect as much information as possible about Jupiter and its moons to gain a better understanding of the formation and evolution of the Solar System. Galileo, which orbited Jupiter for nearly eight years, is known for its discoveries, which include the first observation of a moon orbiting an asteroid (243 Ida) and the first direct measurement of the composition of a comet's nucleus, as well as for the detailed images it captured of Jupiter and its moons.
Galileo was created by NASA's Jet Propulsion Laboratory (JPL), which was also in charge of the spacecraft's design, construction, and mission management. Galileo was the first spacecraft to use a gravity assist flyby to achieve a planetary encounter, and it was the first spacecraft to enter orbit around an outer planet.
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If the separation between the openings in the double slit is increased, what happens to the distance between the fringes on the screen
Answers
Width of the fringes gets decreased if the distance between the slits is increased and thus we get narrower fringes.
What is Young's double-slit experiment?
In modern physics, the double-slit experiment is a demonstration that light and matter can display characteristics of both classically defined waves and particles; moreover, it displays the fundamentally probabilistic nature of quantum mechanical phenomena. This type of experiment was first performed, using light, by Thomas Young in 1802, as a demonstration of the wave behavior of light.A wave is split into two separate waves (the wave is typically made of many photons and better referred to as a wave front (not to be confused with the wave properties of the individual photon)) that later combine into a single wave. Changes in the path-lengths of both waves result in a phase shift, creating an interference pattern.A coherent light source, such as a laser beam, illuminates a plate pierced by two parallel slits, and the light passing through the slits is observed on a screen behind the plate. The wave nature of light causes the light waves passing through the two slits to interfere, producing bright and dark bands on the screen – a result that would not be expected if light consisted of classical particles. However, the light is always found to be absorbed at the screen at discrete points, as individual particles (not waves); the interference pattern appears via the varying density of these particle hits on the screen. Furthermore, versions of the experiment that include detectors at the slits find that each detected photon passes through one slit (as would a classical particle), and not through both slits (as would a wave).However, such experiments demonstrate that particles do not form the interference pattern if one detects which slit they pass through. These results demonstrate the principle of wave-particle duality.To learn more about Young's double-slit experiment: https://brainly.com/question/28108126
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A space station has a mass M and orbits Earth in a circular orbit at a height above Earth’s surface. An astronaut in the space station appears weightless because the astronaut seems to float. Which of the following claims is true about the force exerted on the astronaut by Earth ?
A) there is no force exerted on the astronaut by Earth because the astronaut is 400km above Earth’s surface
B) the force exerted on the astronaut by Earth is less than the force exerted by the astronaut because the astronaut is 400km above Earths surface
C) the force exerted on the astronaut by Earth is equal to the gravitational force of the space station that is exerted on the astronaut; the two equal forces balance to cause the astronaut to float.
D) the force exerted on the astronaut by Earth is equal to the force exerted on Earth by the astronaut
Please help me with this question if you can ! It would be very much appreciated . Thank you
Answers
Answer:
The correct option is;
D) The force exerted on the astronaut by Earth is equal to the force exerted on Earth by the astronaut
Explanation:
According to Newton's third law of motion, in nature, for every action, there is an equal and opposite reaction, such that if a first object exerts a certain amount of force on a second object, the second object will exert a force of equal magnitude and opposite direction to that exerted by the first object
Therefore, the gravitational force exerted by Earth on the astronaut, is equal to the force exerted by the astronaut on Earth.
The claim from the options that is true about the force exerted on the astronaut by Earth is;
Option D; The force exerted on the astronaut by Earth is equal to the force exerted on Earth by the astronaut.
We are told that the astronaut experiences weightlessness in the space station. This is because he is moving around the earth under the influence of earth's gravitational force and is therefore in a state of 'free fall'.Now, the mass of the earth is much more larger than that of any astronaut. From newton's second law of motion, we know that;
Force(F) = Mass * Acceleration
Since the earth does not move but the astronaut moves, it means the force is sufficient to cause an acceleration of the astronaut but not sufficient to move the earth as the earth's mass is too big.Thus, the same force exerted on the astronaut by the earth is same exerted on the earth by the astronaut.
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In a wire, when elongation is 4 cm energy stored is E. if it is stretched by 4 cm, then what amount of elastic potential energy will be stored in it?
Answers
4E
Explanation:The elastic potential energy of an elastic material (e.g a spring, a wire), is the energy stored when the material is stretched or compressed. It is given by
U = \(\frac{1}{2}kx^2\) --------------------(i)
Where;
U = potential energy stored
k = spring constant of the material
x = elongation (extension or compression of the material).
From the first statement;
when elongation (x) is 4cm, energy stored (U) is E
Substitute these values into equation (i) as follows;
E = \(\frac{1}{2}k(4)^2\)
E = 8k
Make k subject of the formula
k = \(\frac{E}{8}\) [measured in J/cm]
From the second statement;
It is stretched by 4cm.
This means that total elongation will be 4cm + 4cm = 8cm.
The potential energy stored will be found by substituting the value of x = 8cm and k = \(\frac{E}{8}\) into equation (i) as follows;
U = \(\frac{1}{2}\frac{E}{8} (8)^2\)
U = \(\frac{1}{2}{8E}\)
U = \({4E}\)
Therefore, the potential energy stored will now be 4 times the original one.
A fast Humvee drove from desert A to desert B. For the first 12
hours, it travelled at an average speed of 185 km/h. For the
next 13 hours, it travelled at an average speed of 160 km/h.
What was the average speed of the whole journey?
km/h
Answers
Answer: 172
Explanation: Because yeah
Which is not part of an
atom?
A. Proton
B. Neutron
C. Electron
D. Carbon
Answers
Answer:D.carbon
Explanation:Protons are positively charged,neutron us nuetrally charged and electron is negatively charged and it contains a ne clues in the centre.
Answer:
Carbon
Explanation:
It is because Carbon is a relatively light element.
A bicycle takes 8.0 seconds to accelerate at a constant rate from rest to a speed of 4.0 m/s. If the mass of the bicycle and rider together is 85 kg, what is the net force acting on the bicycle? (Hint: Calculate Acceleration!)
Answers
Answer:
42.5 N
Explanation:
3. Why is a subducting plate boundary considered a type of
convergent plate boundary?
Answers
Answer:
✔ convergent
Explanation:
Answer:
B ( Convergent)
Explanation:
factors that affect pressure in solids
Answers
Answer:
PRESSUREPressure is the force acting normally per unit area.
Pressure due to solids depends on the factors:Force.
Area.
This also proved by formula:
P=F/A.
Also pressure due to liquid depends on density ,gravity and height
descibe the movement of the particles at the boiling point of a substance, what is happening with temperature and energy
Answers
Which of these locations is most likely to have the oldest rocks?
A) a transform fault zone
B) the middle of a continent
C) a mid-ocean ridge
D) the top of a mountain range
E) an abyssal plain of an ocean basin
Answers
Therefore, the middle of a continent is most likely to have the oldest rocks that is option B.
What is ocean?An ocean is a large body of saltwater that covers a significant portion of the Earth's surface. There are five major oceans on Earth: the Pacific Ocean, the Atlantic Ocean, the Indian Ocean, the Southern Ocean, and the Arctic Ocean. Oceans are integral components of the Earth's climate system, and play a critical role in regulating the planet's temperature, weather patterns, and carbon cycle. They are also home to a diverse array of marine organisms, from tiny phytoplankton to massive whales and sharks. The oceans are also important for human activities such as transportation, trade, and fishing, and are a valuable source of natural resources such as oil, gas, and minerals. However, human activities such as pollution, overfishing, and climate change are also having a significant impact on the health and resilience of the oceans and the life they support.
Here,
The age of rocks can vary widely depending on where they are located and how they were formed. However, in general, the oldest rocks are found in the stable interior regions of continents, which have not been subject to the tectonic processes that produce younger rocks in other locations.
Transform fault zones, mid-ocean ridges, and abyssal plains are all associated with seafloor spreading and other tectonic processes, which tend to produce younger rocks. The top of a mountain range may have some older rocks, but it may also have younger rocks that were uplifted during the formation of the mountain.
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water flows through a pipe of diameter 0.8 at a velocity of 2m/s if someone puts a nozzle on the end of the pipe at what speed will the water exit the pipe
Answers
We can use the principle of conservation of mass to find the exit speed of water when a nozzle is attached. We'll need to know the diameter of the nozzle to determine the speed.
Assuming that the diameter of the nozzle is provided as 'd' meters, we can use the equation of continuity:
A1 * v1 = A2 * v2
Here, A1 and v1 represent the initial area and velocity of the pipe, respectively. A2 and v2 represent the area and velocity of the nozzle, respectively.
Step 1: Find the areas of the pipe and nozzle.
A1 = (pi/4) * (0.8)^2
A2 = (pi/4) * d^2
Step 2: Plug the areas and initial velocity into the equation of continuity.
(0.8)^2 * 2 = d^2 * v2
Step 3: Solve for v2, the exit speed of water.
v2 = (0.8^2 * 2) / d^2
The exit speed of water (v2) from the nozzle depends on the diameter (d) of the nozzle and can be calculated using the formula v2 = (0.8^2 * 2) / d^2.
In order to find the exit speed of water when a nozzle is attached to the pipe, you need to know the diameter of the nozzle. By applying the principle of conservation of mass and using the equation of continuity, you can find the exit speed of water as it flows through the nozzle.
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An iron nail is more strongly attracted to the a) north pole of a magnet b) south pole of a magnet. c) north or south pole-no difference really
Answers
An iron nail is drawn to the magnet's north pole and adheres to it. The iron nail becomes a conduit for the magnetic field lines. As a result, the side that becomes attached to the North Pole serves as the South Pole.
Is an iron nail more drawn to a magnet's north or south pole?
A magnet's strength is greatest close to its poles. Therefore, the magnet's two poles will attract the greatest amount of nails.
An iron nail is more attracted to which pole of a magnet?
Iron nails are magnetically inducted to acquire the opposite polarity when they are brought close to one end of a magnet. Since opposing poles are drawn to one another,
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earth’s magnetic field is generated in the , which is composed of that is constantly .
Answers
Earth's magnetic field is generated in the core, which is composed of molten iron and nickel that is constantly in motion.
In what region is Earth's magnetic field generated?The Earth's magnetic field is generated in the core, which is located at the center of our planet. The core is composed of molten iron and nickel, and it is in constant motion. This motion creates a phenomenon known as the geodynamo, which generates Earth's magnetic field.
The geodynamo works through a process called convection. The intense heat from the core causes the molten iron and nickel to become buoyant, leading to a continuous circulation of the materials. This motion generates electric currents, which, in turn, produce a magnetic field. The Earth's rotation further amplifies this field, creating the complex and dynamic magnetic field we observe.
The magnetic field generated by the core extends from the Earth's interior to its surrounding space, creating a protective shield called the magnetosphere. This shield plays a crucial role in shielding the planet from harmful solar radiation and charged particles emitted by the Sun. Additionally, Earth's magnetic field enables navigation by acting as a compass for birds, animals, and even some microorganisms.
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Una pelota cae con una energía de 1 J y bota al llegar al suelo. Si tras el bote su energía es de 0,998 J, ¿podemos afirmar que la energía se ha destruido?
Answers
Answer:
The energy is not destroyed, the energy has been transformed into another kind of energy, in this case to heat with energy of 0,002 J
Explanation:
One of the fundamental principles of physics states that energy is neither created nor destroyed, it is only transformed.
In this case, when the ball with an energy of 1 J bounces on the ground, it loses an energy equivalent to 1-0.998 J = 0.002 J. This energy of 0.002 J is not destroyed in the process, but is transformed into another type of Energy. In this case, said energy has been converted to heat. A heat equivalent to 0.002 J of energy.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Translation to spanish
Uno de los principios fundamentales de la física afirma que la enegía no se crea ni se destruye, sólo se transforma.
En este caso, cuando la pelota con una energía de 1 J rebota en el suelo pierde una energía equivalente a 1-0,998 J = 0,002 J. Esta energía de 0,002 J no se destruye en el proceso, sino que se transforma en otro tipo de energía. En este caso dicha energía se ha convertido en calor. Un calor equivalente a 0,002 J de energía.
What does a speed-time graph indicate about an objects motion?
Answers
Answer:
A horizontal line on a speed-time graph represents a constant speed. A sloping line on a speed-time graph represents an acceleration. The sloping line shows that the speed of the object is changing. The object is either speeding up or slowing down.
give me brainlist
Explanation:
Think about how you obtain the energy you need to do everyday activities like doing chores, going to school, or playing sports. Write about it in the box below. Ms Earth Science
Answers
Carbohydrates are broken down into glucose, which is then used by cells to produce energy through a process called cellular respiration.
What is Cellular Respiration?
It is a complex biochemical process that occurs in the mitochondria of cells and involves multiple steps and intermediate molecules. The energy released during cellular respiration is used to power the activities of the cell, including muscle contractions, cell division, and protein synthesis. Cellular respiration can be aerobic or anaerobic, depending on the availability of oxygen, and involves the use of enzymes and electron transport chains to generate ATP, the energy currency of the cell.
Fats are broken down into fatty acids and glycerol, which can also be used for energy production. Proteins can also be broken down into amino acids, which can be used for energy production in certain circumstances. The energy produced by these processes is stored in the form of ATP molecules, which can be used by cells to perform various functions and activities.
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For a pull box housing shielded conductors carrying over 1,000V and used in an angled pull, the distance between a conductor entry and exit must be________
Answers
Answer: For a pull box housing shielded conductors carrying over 1000V and used in an angled pull, the distance between a conductor entry and exit must be 36 times the outside diameter.
Explanation: To find the correct explanation to the question, we have to find more about the pull box housing shielded conductors.
What is pull box?Pull box is an underground electrical container, that made up of composite materials that used in traffic signal installation and also provide access to underground detectors as well as interconnected cables. These are used to simplify the wiring installation. What are the types of pull boxes?There we have two types of pull boxes, such as, one is for straight pulls and the other is for angle or U pulls.For straight pulls the length of the box shall not be less than 48 times the outside diameter of the cable.Angled pulls can be again classified as, Distance to opposite wall, Distance between entry and exit and removable sides.The distance between a conductor entry and exit from the box shall not be less than 36 times the outside diameter of the conductor.Thus, we can conclude that, for a pull box housing shielded conductors carrying over 1000V and used in an angled pull, the distance between a conductor entry and exit must be 36 times the outside diameter.
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How do the sperm cells of nonvascular plants reach the egg cells during reproduction?
A.) The sperm cells are forcefully ejected from their capsules to hit the egg cells.
B.) The sperm cells are blown by the wind and land on the egg cells.
C.) The sperm cells swim to the egg cells through their watery surroundings.
Answers
Answer:
C.) The sperm cells swim to the egg cells through their watery surroundings.
Problem 1: A force of 45 newtons is applied on an object, moving it 12 meters away in the same direction as the force. What is the magnitude of work done on the object by this force? Part B: From the Library, select the general equation to solve for work in a problem like this. Then click Done.
Answers
Work = 540 joules is the amount of work that was done on the item by this force.
What factors determine how much work a force can produce?The amount of work a force can produce relies on the force, the body's displacement, and the angle between the two. When displacement is in the force's direction, the most work is produced.
What is the second law of work by Newton?Newton's second law provides a precise explanation of the modifications that a force can make to a body's motion. According to this, a body's momentum changes at a rate that is equal to the force acting on it over time in both magnitude and direction.
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The property of matter that resists changes in motion is called
inertia.
friction.
weight.
gravity.
Answers
Answer:
friction
Explanation:
The property of matter that resists changes in motion is called friction. Details about friction can be found below.
What is friction?Friction is a force that resists the relative motion of two bodies in contact.
Friction is a resisting force that is experienced when two bodies are moving over one another, hence, is said to resist changes in motion. Examples of cases of friction are as follows:
Vehicle moving over a tarred roadSliding of both hands over one anotherTherefore, the property of matter that resists changes in motion is called friction.
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orange light with wavelength 600nm in vacuum is incident on a material with index of refraction 50. calculate the velocity and frequency of the light in the material.
Answers
The speed of light in vacuum is(3*10^8 m/s).
What is speed?
The speed of an object, also known as v in kinematics, is the size of the change in that object's position over time or even the size of the change in that object's position per unit of time, making it a scalar quantity. The initial speed is the upper limit of a average speed as that of the duration of a time interval gets closer to zero. The average speed of the object in a period of time is indeed the distance travelled by object divided by duration of the interval. Velocity and speed are not the same thing. The dimensions of speed are time divided by distance.
The velocity of the light in the material is 0.2c, where c is the speed of light in vacuum (3*10^8 m/s).
The frequency of the light in the material is equal to the frequency of the light in vacuum divided by the index of refraction, which is equal to (3*10^8 m/s) / 50 = 6*10^6 m/s.
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rate the states of matter from least to most dense.
Answers
The states of matter can be ranked from least to most dense as follows: gases, liquids, and solids.
The states of matter can be ranked from least to most dense as follows:
Gases: Gases have the least density among the three states of matter. The particles in a gas are spread out and move freely, resulting in low density. Examples of gases include oxygen, nitrogen, and carbon dioxide.Liquids: Liquids have a higher density compared to gases. The particles in a liquid are closer together, but still have some freedom of movement. Examples of liquids include water, oil, and alcohol.Solids: Solids have the highest density among the three states of matter. The particles in a solid are tightly packed together, resulting in a higher density. Examples of solids include metals, rocks, and wood.It is important to note that there can be exceptions to this general ranking. For example, ice (solid water) is less dense than liquid water, which is why ice floats on water. The density of a substance can also be affected by temperature and pressure.
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The rate of states of matter from least to most dense are Gases, Liquids, Solids. Each state of matter is unique and has a different level of density. Keep reading to understand why.Gases Gas is the least dense of all states of matter. Particles in gases are very far apart and they don't have a definite shape or volume.
They spread out to fill the space they are in. There is a lot of space between gas particles, which makes them compressible. This means that they can be squashed down into smaller spaces and when they expand, they spread out and take up more space. Examples of gases include helium, oxygen, and carbon dioxide.LiquidsLiquids are more dense than gases. The particles in liquids are closer together than gas particles but are not as compact as the particles in solids. Liquids have a definite volume, but they don't have a definite shape, they take on the shape of the container they are in. The particles in liquids can slide past one another.
Examples of liquids include water, oil, and blood.SolidsSolids are the most dense state of matter. The particles in solids are very closely packed together. They are arranged in a regular pattern and can only vibrate in place. Solids have a definite shape and volume. They can't be squashed into smaller spaces. Examples of solids include ice, wood, and rock.
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the current in a series circuit is 24.0 a. when an additional 24.0-ω resistor is inserted in series, the current drops to 18.0 a. what is the resistance in the original circuit?
Answers
The resistance in the original circuit is 72.0 Ω.
To solve this problemWe can make use of series circuits and Ohm's Law. The sum of the individual resistances in a series circuit determines the total resistance.
Assume that R is the resistance of the circuit's initial configuration (before the inclusion of the additional resistor).
According to Ohm's Law, the following equation can be used to determine the current (I) in a circuit:
I = V / R
where I is the current, V is the voltage, and R is the resistance.
Given that the current in the original circuit is 24.0 A, we can write the equation as:
24.0 = V / R
Similarly, after adding the 24.0-Ω resistor in series, the current drops to 18.0 A. The equation for this scenario is:
18.0 = V / (R + 24.0)
We can set up a system of equations using these two equations and solve for R.
Equation 1: 24.0 = V / R
Equation 2: 18.0 = V / (R + 24.0)
To eliminate V, we can rearrange Equation 1 to express V in terms of R:
V = 24.0R
Substituting this into Equation 2:
18.0 = (24.0R) / (R + 24.0)
To solve for R, we can cross-multiply and simplify:
18.0(R + 24.0) = 24.0R
18.0R + 432.0 = 24.0R
432.0 = 24.0R - 18.0R
432.0 = 6.0R
R = 432.0 / 6.0
R = 72.0
So, the resistance in the original circuit is 72.0 Ω.
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2. how much energy, in kj, does a 75 watt light bulb use then it is turned on for 25 minutes? (3 points)
Answers
112.5 kJ is used when a 75 watt light bulb used for 25m.
Energy is a quantitative property given to a body or physical system, identifiable in the performance of work or in the form of heat and light. Standard mechanical size. Energy is Conserved - The law of conservation of energy states that energy can be transformed into form, but cannot be created or destroyed. The unit of measure for energy in the International System of Units (SI) is the joule (J). Common forms of energy include the kinetic energy of moving bodies, the potential energy stored in bodies (due to their position in the field, etc.), the elastic energy stored in fixed bodies, the chemical energy associated with chemical reactions, Radiant energy carried by electromagnetic radiation and internal energy contained in thermodynamic systems. All living things absorb and emit energy all the time.
Energy = Power x Time
Time = 25 minutes
= 25 x 60 sec = 1500 sec
Power = 75 watt
Energy = 75 x 1500
112,500 Joules
Energy in KJ = 112,500/1000
= 112.5 KJ
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This sport involves travelling down a
fast-flowing river in an inflatable boat.
What is called?
Answers
Answer: rafting
Explanation:
this sport is called rafting because they go down a river with fast paced water and a blow up boat because they do it for a thrill like a water ride.