as the temperature of the water increase, the concentration of dissolved oxygen​

Answer:

The fly will travel 20 miles before the runners collide with each other.

Explanation:

Since the runners are both traveling at the same speed, they will meet and collide in the exact middle of each other which is 5 miles away from their starting point. Since they are traveling at 5 mph, it will take exactly one hour before they collide. The fly is going 20 mph so it will travel 20 miles before the runners collide in one hour.

Impoundment or dams are used to collect the water to enhance the amount of running water. Gravity is used to direct water down a pen stock pipe from a hole in the dam. The turbine is spun by the flowing water, and this rotation of the magnets inside the generator produces power.

Hydroelectric energy, also known as hydroelectric power or hydroelectricity, is a type of energy that uses the force of moving water to produce electricity, such as water running down a waterfall. This force has been utilized by people for ages. Greeks have been grinding wheat into flour for over 2,000 years by using flowing water to turn their mill's wheel.

The majority of hydroelectric power plants feature a water reservoir, a gate or valve to regulate the amount of water that flows out of the reservoir, and an outlet or location where the water ends up after flowing downstream. Just before water rushes over the top of a dam or cascades down a hill, it gains potential energy. Water flowing downhill changes potential energy into kinetic energy. When a turbine's blades are turned by water, electricity is produced and sent to the power plant's users.

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F=m*a

T = 142N

Work = Force x distance

distance = 6.1 M

Force = 142 x cos 37 = 113.4 N

W= 113.4N x 6.1M = 691.78 J

Taking into account definition of percent yield, the percent yield for the reaction is 70.46%.

In first place, the balanced reaction is:

Zn + 2 HCl → ZnCl₂ + H₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 65.37 grams of Zn form 136.27 grams of ZnCl₂, 19.2 grams of Zn form how much mass of ZnCl₂?

mass of ZnCl₂= (19.2 grams of Zn× 136.27 grams of ZnCl₂)÷ 65.37 grams of Zn

mass of ZnCl₂= 40.02 grams

Then, 40.02 grams of ZnCl₂ can be produced when 19.2 grams of Zn react with an excess of HCl.

The percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.

The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:

percent yield= (actual yield÷ theoretical yield)× 100

where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.

In this case, you know:

Replacing in the definition of percent yields:

percent yield= (28.2 grams÷ 40.02 grams)× 100

Solving:

percent yield= 70.46%

Finally, the percent yield for the reaction is 70.46%.

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Notice that 40.35 is 5 times the half-life of 8.07 days. So in this time, the starting amount x of the sample was halved 5 times until 25 g of it were left, meaning

x/2⁵ = 25 g

Solve for x :

x = 2⁵ • (25 g) = 800 g

Answer:

10g to kg=0.01

20×0.01=0.2

Force of 0.2N

Answer:

\(N_P = 40\ N_S\)

To reduce the output voltage to 6v in transformers if the input voltage is 240v​, we need to have 40 times as many turns in the primary coil as there are in the secondary coil.

Explanation:

The change in voltage of a transformer depends upon the turns ratio of the transformer between secondary and primary coil. Following formula can be used to determine the turns ratio in this case:

\(\frac{N_P}{N_S} = \frac{V_P}{V_S} \\\\\)

where,

\(N_P\) = No. of turns in the primary coil

\(N_S\) = No. of turns in the secondary coil

\(V_P\) = voltage in the primary coil = 240 V

\(V_S\) = voltage in the secondary coil = 6 V

Therefore,

\(\frac{N_P}{N_S} = \frac{240\ V}{6\ V} \\\\N_P = 40\ N_S\)

To reduce the output voltage to 6v in transformers if the input voltage is 240v​, we need to have 40 times as many turns in the primary coil as there are in the secondary coil.

Answer: It would be the dependent variable.

Explanation:

The dependent variable is limited and can be affected by the changes and manipulation of the independent variable.

Answer: The charge that flows through the wire in 60 s is 14.87 C.

Explanation: The charge that flows through the wire in 60 s can be calculated using the formula:

Charge = Current x Time

The current can be calculated using Ohm’s law:

Current = Voltage / Resistance

Substituting the given values:

Current = 3.00 V / 12.1 Ohms = 0.2479 A

Charge = 0.2479 A x 60 s = 14.87 C

Hope this helps, and have a great day! =)

Answer:

Find the given attachments

Alice is weightless because she is in free fall.

Free-fall occurs when an object is experiencing the force of gravity but is not experiencing any other forces, such as air resistance. Because Alice is in a spacecraft, air resistance is not a factor, so she is essentially in a vacuum.

When an object is in a vacuum, the only force acting upon it is gravity. Therefore, Alice is in free fall and is experiencing weightlessness. This is in contrast to you, who is experiencing 1g of acceleration due to the force of the engine of your spacecraft.

This force is greater than the force of gravity, so you are not in free fall, and thus you are feeling the effects of the gravitational field.

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A star is considered circumpolar if it remains above the horizon throughout the entire night. The greatest distance that a star can be from Polaris, the North Star, and still be circumpolar is 50°.

Circumpolar stars are those that do not set below the horizon but instead appear to revolve around the celestial pole. In the northern hemisphere, Polaris serves as the North Star, located very close to the celestial north pole.

For a star to be circumpolar as seen from Philadelphia (latitude 40.0°), it must remain above the horizon at all times during the night.

The distance between Polaris and the celestial pole is equivalent to the observer's latitude. In this case, since the latitude of Philadelphia is 40.0°, any star within 40.0° of Polaris will be circumpolar.

Therefore, the greatest distance a star can be from Polaris and still be circumpolar is 40.0° + 10.0° (as the North Star is approximately 10.0° away from the celestial pole), giving a total of 50.0°.

Any star within this range, up to 50.0° from Polaris, will never dip below the horizon and will remain visible throughout the entire night as a circumpolar star.

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The force which counteracts the thrust force for the flight is known as the drag force, as it opposes the flow.

Drag is a force that opposes an object's relative motion to a fluid environment in the field of fluid dynamics. It may be among two liquid film (or surfaces) or in between a liquid and a flat wall. The drag force is influenced by velocity, as opposed to other resistive forces like dry contact, which are essentially independent of it.

When a flow is moving at low or high speed, the drag force is equal to the speed for low pressure and to the square of the velocity for high-speed flow. Although viscous friction is what ultimately causes drag, turbulent drag is unaffected by viscosity.

A force in physics is an input that has the power to change an object's motion. A mass-containing object's velocity can vary, or accelerate, as a result of a force. Intuitively, a push or a pull can also be used to describe forces.

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The drag force, which resists the flow, is the force that balances the propulsion force for flight.

In the study of fluid dynamics, drag is a force that opposes an object's relative motion to a fluid environment. It could be situated between two liquid surfaces (or films) or between a liquid and a flat wall.

Unlike other resistive forces like dry contact, which are largely independent of velocity, the drag force is affected by it.

For low pressure and high speed flows, respectively, the drag force is equal to the speed for low pressure and the square of the velocity. Although drag is ultimately caused by viscous friction, turbulent.

Thus, The drag force, which resists the flow, is the force that balances the propulsion force for flight.

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Answer:

The organisms Rachel see are all inter dependent on one another to survive in the form of a food chain. This relationship helps the swamp ecosystem thrive.

Explanation:

In this swamp ecosystem, the Sandhill crane relies on the fishes for food, Some of the fishes rely on the algae or the snail for food and the snail also rely on the algae for food. This relationship not only serves to nourish the organism above the food chain but serves a general purpose of controlling the ecosystem. The absence of one or more of these organisms, say the algae can offset the ecosystem in a chain reaction that might go as far as affecting the cranes. Also, the absence of algae feeders can lead to an algae boom which might overpower the oxygen concentration in the pond further killing other organisms in the pond that need oxygen for respiration.

The momentum of the second car is 40 kg.m/s with the initial momentum and final momentum before and after the collision.

Momentum equals the product of mass and velocity. The velocity is defined as the rate of change of displacement and measures the speed with respect to direction. Velocity is the vector quantity and hence, momentum is the vector quantity.

From the given,

Initial momentum before collision (C₁) = 30 kg.m/s

Initial momentum before collision(C₂) = 20 kg.m/s

Final momentum after collision (C₁) = 15 kg.m/s

Final momentum after collision(C₂) =?

Initial momentum of C₁, C₂ = final momentum of C₁, C₂

30×20 = 15× X

X = 30×20 / 15

  = 40 m/s.

The final momentum of the car is 40 kg.m/s.

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Answer:

6.6 Meters = 660 Meters

Explanation:

1 Meter = 100 Centimeters

Answer:look it up lol

Explanation:

Maakskzksmzmzkzksksksksa

Answer:

The scientific method is defined as a method of research in which a problem is identified, relevant data is gathered, a hypothesis is formulated from this data, and the hypothesis is empirically tested.

Steps of the Scientific Method

1- Ask a question

2- Do research

3- Make a hypothesis

4- Test your hypothesis with an experiment

5- Analyze the data and make a conclusion

HOPE THIS HELPS AND PLEASE MARK BRAINLIEST!

The probable origin of the dark colored features in the surface of mars for about 20 kilometers across are dunes shaped by the wind.

Explanation:

Dunes are familiar features on Earth and they also occur on Mars, Venus, and Saturn's moon, Titan. What all these bodies have in common is an atmosphere, plus substantial amounts of loose sand-size particles. Of all the extraterrestrial dunes scientists know about, those on Mars are the most closely studied.

A dune is a heap of sand piled up and shaped by the wind. (Underwater dunes exist on Earth, but we can ignore these in regard to today's Mars.) The word "dune" implies a substantial size — at least several meters (yards) high. But small ripples of sand only a few centimeters (inches) high are made in the same way from the same materials. The difference lies mainly in the supply of particles and how much time the wind has had to work on them.

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The area of each plate of an empty parallel-plate capacitor can be calculated using the given capacitance and the distance between the plates.

The capacitance (C) of a parallel-plate capacitor is determined by the formula C = (ε₀ * A) / d, where ε₀ is the permittivity of free space, A is the area of each plate, and d is the distance between the plates.

In this case, we are given the capacitance (C) as 1.5 pF (picofarads) and the distance (d) as 3.5 mm (millimeters). We need to find the area (A) of each plate.

Rearranging the formula, we have A = (C * d) / ε₀.

The permittivity of free space (ε₀) is a constant value of approximately 8.854 x 10^(-12) F/m (farads per meter).

Converting the distance from millimeters to meters, we have d = 3.5 mm = 3.5 x 10^(-3) m.

Plugging in the values, we can calculate the area as A = (1.5 x 10^(-12) F * 3.5 x 10^(-3) m) / (8.854 x 10^(-12) F/m).

Performing the calculation, we find the area of each plate to be approximately 5.936 x 10^(-6) square meters or 5.936 mm².

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(a) The time the ball is in motion is equal to the total time taken to reach its maximum height, plus the time taken to travel the horizontal range, which is given by:

t = (2vi*sin(i))/g + (R)/(vi*cos(i))

(b) The speed of the ball at its peak is given by:

V_peak = √(2g(-R/6))

(c) The initial vertical component of the ball's velocity is equal to vi*sin(i).

The frequency of the wave is 124 Hz, the wavelength is 2.4 m, and the speed is 449 m/s.

The frequency of a wave is given by the reciprocal of the time it takes for one complete cycle to pass a fixed point and is given by the formula: f = 1/T, where T is the period.

The wavelength of a wave is the distance between two consecutive points on the wave that are in phase and is given by the formula: λ = v/f, where v is the speed of the wave. The speed of a wave is the distance traveled by the wave per unit time and is given by the formula: v = λf.

By using these formulas, we can calculate the frequency, wavelength, and speed of the wave in the given equation. These values provide important information about the wave, such as its stability, energy, and behavior.4

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Answer:

number 4

Explanation:

The reflection of light happens when the light bounces off the reflecting surface. That is described by the last (bottom) schematics.

Therefore, select answer number 4.

The exact position of an electron cannot be known. Instead, we can calculate the probability that an electron is in a specific area based on electron cloud model.

The electron cloud model is a model of an atom in which the atom consists of a small but massive nucleus surrounded by a cloud of rapidly moving electrons.

The electron cloud model says that we cannot know exactly where an electron is at any given time, but the electrons are more likely to be in specific areas.

Thus, the exact position of an electron cannot be known. Instead, we can calculate the probability that an electron is in a specific area based on electron cloud model.

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Answer: The pressure decreases as the temperature decreases.

Explanation: As the temperature decreases, the particles of gas start moving more slowly. The particles' velocity decreases and as it collides with the wall of the container, it exerts a less force on the walls of the container. This follows on from the equation Ft = mv - mu. Less force therefore means less pressure as force and pressure are proportional according to equation Pressure = Force / Area.

Answer:

Newton's Cradle works on the principle of Conservation of momentum

Explanation:

Newtons Cradle works on the principle of Conservation of Momentum, which states that when Collision happens between two or more bodies their Momenta remain conserved that is they remain same before and after collision.

m1*v1 = m2*v2

where m1 and m2 are the masses of the bodies and v1 and v2 are their velocity with which they are travelling.

Considering the case of Newton's Cradle, when a ball on the Left end is lifted to a height and then it is released so it imparts its momentum on the next ball, it seems that all the middle balls remain stationery but what actually happens is that their individual momenta are being transferred from on ball to the other.

Also when this momentum reaches to ball on the right there is no next ball therefore the ball on the rightmost position moves to nearly the same height as the one which was lifted on the left side.

One may note that whenever we lift one ball from any end, the same number of ball will be lifted from the other end. Like if we have lifted two balls from left end so two balls from the rightmost position will be lifted.  

The amοunt οf kinetic energy that is translatiοnal is apprοximately 172.8 J, and the amοunt that is rοtatiοnal is apprοximately 8.733 J.

Tο determine the amοunt οf kinetic energy that is translatiοnal and rοtatiοnal, we need tο calculate the respective cοntributiοns.

The translatiοnal kinetic energy (\(\rm K_{trans\)) οf a rοlling sphere is given by the equatiοn:

\(\rm K_{trans\) = (1/2) * m * v²

where m is the mass οf the ball and v is the linear speed.

Given:

Mass οf the baseball (m) = 0.15 kg

Linear speed (v) = 48 m/s

Substituting the values intο the equatiοn, we can calculate the translatiοnal kinetic energy:

\(\rm K_{trans\)  = (1/2) * 0.15 kg * (48 m/s)²

= 0.15 kg * 1152 m²/s²

= 172.8 J

The rοtatiοnal kinetic energy (\(\rm K_{rot\)) οf a rοlling sphere is given by the equatiοn:

\(\rm K_{rot\) = (1/2) * I * ω²

where I is the mοment οf inertia οf the sphere and ω is the angular speed.

Fοr a sοlid sphere, the mοment οf inertia is given by:

I = (2/5) * m * r²

where r is the radius οf the ball.

Given:

Radius (r) = 3.7 cm = 0.037 m

Angular speed (ω) = 42 rad/s

Substituting the values intο the equatiοn, we can calculate the rοtatiοnal kinetic energy:

I = (2/5) * 0.15 kg * (0.037 m)²

= 0.00277 kg * m²

K_rοt = (1/2) * 0.00277 kg * m² * (42 rad/s)²

= 0.00277 kg * m² * 1764 rad²/s²

= 8.733 J

Therefοre, the amοunt οf kinetic energy that is translatiοnal is apprοximately 172.8 J, and the amοunt that is rοtatiοnal is apprοximately 8.733 J.

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A highway department is studying the relationship between traffic flow and speed. Traffic flow is the movement of individual drivers and vehicles between two points, as well as their interactions with one another.the value of the coefficient of determination is R− sq = 0.984

Speed is one of the basic parameters of traffic flow, and the two representations of speed are time mean speed and space mean speed. Enter data in excel. Make new column for values x2.,Now click on Data->Data Analysis and select regresion. In y data range, give range of y values. In x data range, give range of x and x2 values. Click ok.

From the above output:

The estimated regression equation is: y = 612.223+26.215x0.233.x

The coefficient of determination is: R− sq = 0.984

The F test statistic is: F= 90.14

The exact p-value is 0.0021. Therefore, correct option is: less than 0.01.

Can conclude a curvilinear relationship exists for traffic flow and speed because p-value is very small.

When x = 39

y =612.223 + 26.215(39)-0.233(39)2: 1280.58= 1281

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Explanation:

To me, it's option 1

Newton third law states that Every action produces an equal and opposite reaction. Hence, given the fact that the engine is on, it should be producing a constant force every time so, the speed should be constant as the force propelling it is the same

The probability of the stops including Boston and Chicago is 1/100 when an airline tracks each of its airplanes' stops for the day.

To calculate the probability of an airplane making stops in both Boston and Chicago, we need to know the total number of possible cities that the airplane can stop in. Let's say there are 10 possible cities.
The probability of the airplane stopping in Boston on any given stop is 1/10 (since there are 10 possible cities). The same goes for Chicago.
To calculate the probability of the airplane stopping in both Boston and Chicago, we need to multiply the probabilities of each stop. So, the probability of the airplane stopping in both Boston and Chicago on any given day is:
1/10 * 1/10 = 1/100

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