How much power is required for an 80kg firefighter to run up 21.5m in 60s?

Answer:

the answer up top is correct

Answer:

omg, dude you're  giving out this many free points??

TYSM!!!!

God bless!

Mass is constant independent of location or gravity. On Mars or Jupiter, you would have the same mass as you have on Earth. Gravity causes your weight to differ on other worlds.

MASS: The entire amount of matter contained in a thing is referred to as its mass. The inertia of an item may be used to calculate its mass. The mass of an item is constant in all locations. It remains unchanged even when the value of 'g' equals 0.

WEIGHT: The gravitational force by which the earth draws an item is referred to as weight. We may calculate weight using the formula W=m(mass)*g (acceleration due to gravity). It varies depending on where you go (variable). If the value of g is zero everywhere, the object's weight becomes zero.

Here,

The object's mass is constant. As a result, the mass would be the same on Earth and Mars. However, when it comes to weight, it will undoubtedly differ. Weight is determined by the value of g, and the values will differ in both locations.

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the two players will move off together to the left at a speed of 0.12 m/s.

To find the momentum of each player, we use the formula:
momentum = mass x velocity
For the first player (90 kg, 6 m/s to the right):
momentum = 90 kg x 6 m/s = 540 kg*m/s to the right
For the second player (80 kg, 7 m/s to the left):
momentum = 80 kg x (-7 m/s) = -560 kg*m/s to the left
Now we need to use the law of conservation of momentum, which states that the total momentum of a closed system remains constant. In this case, the two players collide and stick together, so we can treat them as a single system.
Before the collision, the total momentum is:
540 kg*m/s to the right (player 1) + (-560 kg*m/s to the left) (player 2) = -20 kg*m/s to the left
After the collision, the total momentum must still be -20 kg*m/s to the left. Let's assume that the two players move off together in the same direction, and call their combined mass M and their combined velocity v. Then:
momentum = M x v
We can write two equations based on conservation of momentum and conservation of mass:
(1) 540 kg*m/s + (-560 kg*m/s) = M x v
(2) 90 kg + 80 kg = M
Solving equation (2) gives M = 170 kg. Substituting into equation (1) and solving for v gives:
v = (-20 kg*m/s) / (170 kg) = -0.12 m/s to the left

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A 2 m tall basketball player is standing at a horizontal distance 7 m away from a basketball hoop. The time taken by the ball to reach the hoop is 1.50 s. The initial velocity of the ball is 9.33 m/s.

The horizontal component of the initial speed is v cos 60° = 0.5 v

The vertical component of the initial speed is v sin 60° = 0.86 v

The player is 7 m away from the basketball hoop.

So, 7 = 0.5 v * t ----(1)

The net height with respect to the player is 3 m - 2 m = 1 m

So, 1 = - g* t²/2 + 0.86 v * t ----(2)

From (1), we have v * t = 14 ----(3)

Using (3) in (2), we have

1 = - 4.9* t² + 0.86 * 14

1 - 12.04 = -4.9 t²

-4.9 t² = -11.04

t² = 2.25

t = 1.50 s

It takes 1.5 s to reach the hoop.

Substituting t in (1), we have v * t = 14
v = 14/1.5 = 9.33 m/s

The initial velocity of the ball is 9.33 m/s.

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The speed of a wave in a uniform medium is directly proportional to the wavelength of the wave when the tension remains the same. If the wavelength of a wave in a uniform medium increases while the tension stays the same, its speed will decrease.

This is due to the fact that as the wavelength of a wave increases, the distance between successive crests or troughs of the wave also increases. Therefore, it will take more time for the wave to travel from one point to another, resulting in a decrease in the speed of the wave.

This can be explained using the wave equation v = fλ, where v is the speed of the wave, f is the frequency of the wave, and λ is the wavelength of the wave. Since the frequency of the wave remains constant in this case, an increase in wavelength results in a decrease in the speed of the wave.

This phenomenon can be observed in various types of waves, including sound waves, water waves, and electromagnetic waves, which all obey the same wave equation.

In summary, if the wavelength of a wave in a uniform medium increases while the tension stays the same, its speed will decrease.

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8. 2055 is the number of 2-liter bottles required to contain the CO2 produced .

Jaguar 30 Hybrid, Cadillac Sedan In a single year, each car covers 15,000 kilometres.39,049,389 litres.874,706,324 is the result of multiplying 47 mol of CO2 by 22.4 l.874,706,324 millilitres.4,373,531,621 litres divided by two .Octane mass of 12 molar: Calculate litres and CO2 particles at STP using 114 g/mol of octane and 1073160900 g of octane.

9,413,692 mol of octane is equal.

105 mol of octane and 114 g of octane per mole. Seven,5309,536 litres. 1,686,933,625 litres are equal to 84 mol of CO2 multiplied by 22.4 litres.

1,686,933,625 Liters divided by two equal 843,466,812.

5 litres My 2009 Mitsubishi Galant produces 843,466,812.5 2-liter bottles worth of CO2, or 1 for every 8 octane, or 8. 2055.

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Answer:

your average speed should be 152.7 M/S. total distance divided by the total time will give you your average speed

Answer:

If the velocity time graph is curved, then the slope of the graph is different at different points. the slope at two different points

Explanation:

acceleration

The gradient of a velocity time graph represents acceleration, which is the rate of change of velocity. If the velocity-time graph is curved, the acceleration can be found by calculating the gradient of a tangent to the curve.

Use all of the listed words in any order in one sentence that makes scientific sense given below also using other words, including conjunctions.

(a) In the realm of science, Karl Popper's theory of falsification emphasizes the importance of making predictions that can be tested and potentially disproven, allowing for the advancement of knowledge, exemplified by my neighbor's groundbreaking research in the field.

(b) Lord Kelvin's contributions to nuclear physics led to the discovery of the gluon, a fundamental particle that mediates the strong force, enabling the understanding of quark interactions, much like the powerful engine of a car propelling it forward.

(c) The Higgs mechanism, responsible for breaking the symmetry in particle interactions, played a crucial role during cosmic inflation, shaping the flatness and horizon problems observed in the early universe, akin to the mysterious and captivating landscapes of a distant planet.

(d) During nucleosynthesis, the rapid fusion of elements within a stellar environment can produce heavy metals like gold, contrasting with the slower process found in supernovae explosions, where vast amounts of energy are released and dispersed throughout space, reminiscent of the metallic shine found in a precious metal.

(e) When galaxies collide, their spiral structures can be disrupted, resulting in the formation of elliptical or irregular galaxies, displaying peculiar configurations resembling the intricate patterns and textures found in a variety of foods.

(f) Through the analysis of emission and absorption lines using spectroscopy, scientists can deduce the heat distribution and identify elements present in a celestial object, such as a star or nebula, which contributes to the continuum of knowledge and understanding, much like the continuous presence of a beloved celebrity.

(g) Stephen Hawking's groundbreaking work on black holes shed light on the mysterious nature of dark matter and dark energy, unveiling the intricate relationship between matter, radiation, and energy, similar to the enigmatic properties observed on a distant planet.

(h) In the vast cosmos, stars come in various forms, ranging from massive giants to compact pulsars and even enigmatic quasars, each emitting their own unique spectrum of light, including shades of vibrant colors other than black or white, illuminating the cosmic tapestry with their brilliance.

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El flujo magnético a través de una bobina con 460 vueltas de superficie de 2 m² cuyo eje forma un ángulo de 60 ° con un campo magnético uniforme de 2 es 779.42 Weber

La fórmula para calcular el flujo magnético a través de una bobina se expresa como:

\(\phi = NABsin\theta\) dónde:

Dados los siguientes parámetros

N = 450 turns

A = 2 m²

B = 2

\(\theta\) = 60degrees

Sustituya los parámetros dados en la fórmula como se muestra:

\(\phi=450 \times 2\times 2sin60^0\\\phi = 900sin60^0\\\phi = 900(0.8660)\\\phi=779.42Weber\)

El flujo magnético a través de una bobina con 460 vueltas de superficie de 2 m² cuyo eje forma un ángulo de 60 ° con un campo magnético uniforme de 2 es 779.42 Weber

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Reason: The quantity work has to do with a force causing a displacement. Work has nothing to do with the amount of time that this force acts to cause the displacement. Sometimes, the work is done very quickly and other times the work is done rather slowly. For example, a rock climber takes an abnormally long time to elevate her body up a few meters along the side of a cliff. On the other hand, a trail hiker (who selects the easier path up the mountain) might elevate her body a few meters in a short amount of time. The two people might do the same amount of work, yet the hiker does the work in considerably less time than the rock climber. The quantity that has to do with the rate at which a certain amount of work is done is known as the power. The hiker has a greater power rating than the rock climber.

Power is the rate at which work is done. It is the work/time ratio. Mathematically, it is computed using the following equation.

Power = Work / time

or  

P = W / t

Answer:

it is actually very easy & interesting. first write formula of force F=Mass×Acceleration . now see what are the unknowns , mass is known but acceleration is not . so find acceleration, a=velocity/time , but now again we dont know velocity, V= distance/time . subbing in all the values, Force=Mass×(distance/time^2)

Hope it helps if you have any problem feel free to ask.

From the velocity and time relationship the distance is found.Distance is found as the product of the velocity and time.

Distance is a numerical representation of the distance between two objects or locations.

Distance can refer to a physical length or an estimate based on other factors in physics or common use. |AB| is a symbol for the distance between two points A and B.

The formula for the distance is;

Distance= speed ×Time

We have mass, time and force​.With the help of the given mass and force we can find the acceleration as;

Force = mass ×acceleration

Furthur the velocity is found by the acceleration and time.

Hence by the velocity and time relationship the distance is found.

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[Questoin 1] Volume

     "Charles's law is an experimental gas law that describes how gases tend to expand when heated." Expand = volume, so this answer is correct

[Question 2] b) move faster

     An increase in heat is an increase in energy, which is an increase in particle movement. This means that b is correct, because the particles will be moving faster

[Question 3] a) Celsius

     Charles' Law uses Celsius, so when doing Charles' Law problems you should use Celsius, aka °C

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

Answer:

g, downward

Explanation:

It is given that, a baseball is thrown straight upward. The force acting on the stone is force of gravity. It is moving under the action of gravity. We know that the force of gravity always acts in a downward direction.

At the highest point, the velocity of the stone will be equal to 0. It will move will constant acceleration equal to g and it always acts in downward direction.

Hence, the correct option is (e) "downward direction".

F min=61.25N Ahmed is supporting a 12.5 kg, 4.00 m long board on one end. Judi responds to his request for assistance by accelerating the speed of the motion, and is the rate for which velocity varies over time.

acceleration is the rate of change in both speed and the direction of velocity over time. When anything moves faster or slower in a straight line, it is said to have been accelerated. So because direction is constantly changing, even motion on the a circle accelerates at a constant pace.

This means that a velocity change can be either an alteration in the speed or direction of motion of an object. Acceleration is the process by which an item alters its direction, speed, or both.

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After slowing down by 15 miles per hour and reducing the speed by one third, you are now going at 60 miles per hour.

If you are initially driving at a rate of one and a half miles per minute, it means you are traveling at a speed of 90 miles per hour (since there are 60 minutes in an hour).

In the second step, you slow down by 15 miles per hour. This reduces your speed to 75 miles per hour.

Finally, you reduce your speed by one third, which means you need to subtract one third of 75 from 75. One third of 75 is 25, so subtracting 25 from 75 gives you a speed of 50 miles per hour.

Therefore, after slowing down by 15 miles per hour and then reducing your speed by one third, you are now traveling at a speed of 50 miles per hour.

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To fit a second-order regression model, you need to have a dataset with independent and dependent variables. Once you have the dataset, you can follow these steps:

1. Specify the second-order regression model: The second-order model can be represented as y = β₀ + β₁x + β₂x² + ɛ, where y is the dependent variable, x is the independent variable, β₀, β₁, and β₂ are the coefficients to be estimated, and ɛ is the error term.

2. Estimate the coefficients: Using a regression analysis method, such as ordinary least squares (OLS), estimate the coefficients β₀, β₁, and β₂ that minimize the sum of squared residuals.

3. Calculate the fitted values: Once the coefficients are estimated, calculate the fitted values by substituting the independent variable values into the second-order model equation.

4. Calculate the residuals: Compute the residuals by subtracting the observed dependent variable values from the corresponding fitted values.

5. Plot residuals against fitted values: Create a scatter plot with the fitted values on the x-axis and the residuals on the y-axis.

Now, to evaluate how well the second-order model fits the data, examine the scatter plot of residuals against the fitted values. A well-fitting model would exhibit a random scatter of residuals around zero, indicating that the model captures the variation in the data reasonably well. However, if the plot displays any discernible patterns or systematic deviations from zero, it suggests that the model may be inadequate in explaining the data. In summary, the second-order model's fit can be assessed by inspecting the scatter plot of residuals against fitted values. A good fit is indicated by random scatter around zero, while any patterns or systematic deviations suggest a poor fit. It is crucial to interpret the plot with context and domain knowledge to draw meaningful conclusions about the appropriateness of the second-order model for the data at hand.

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→ The magnitude of the wagons horizontal acceleration is 8.5755 m/s².

First, apply the Second Law of Newton in the 'y' direction. Note: The P force has a component in the axis, it is Psin(40)! Therefore:

\(\Large \text {$N + Psin(40) = W$}\\\\\Large \text {$N + 2N \times sin(40) = m \times g$}\\\\\Large \text {$N(1+ \times 2sin(40)) = m \times g$}\\\\\Large \text {$ \sf N = \dfrac {12 \times 9.8}{1+2sin(40)} = 51.453 $ N}\)

So, in the X direction:

\(\Large \text {$m \times a = 2N \times cos(40)$}\\\\\Large \text {$ \sf a = \dfrac {2 \times 51.453}{12} = 8.5755 m/s^2$}\)

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Answer:

.

Explanation:

A buffer system is set up with \([H_a]=2[-a]\). if \(p_{ka}=5.5\), the pH of the buffer is 5.2.

What is a buffer system?

What are the 3 buffer systems in the body?

The body's chemical buffer system contains of three different buffers:

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a) The velocity of the protons is 566 km/s = 566,000 m/s. Therefore, the current density is:

\(J = pv = (2.077\times10^-11 C/m^3) \times (566,000 m/s) = 1.176\times10^{-5} A/m^2\)

b) The total current is:

\(I = JA = (1.176\times10^-5 A/m^2) \times (1.277\times10^{14} m^2) = 1.501\times10^9 A\)

(a) To find the current density, we need to know the charge density of the protons and their velocity. Protons have a charge of \(+1.602 \times 10^{-19}\)C, and their density is 12.9\(cm^-3\). To convert to SI units, we use \(1 cm^-3 = 10^6 m^-3\), so the charge density is:

\(p = (12.9 cm^-3) \times (1\times10^6 m^-3) \times (1.602\times10^{-19} C) = 2.077\tmes10^{-11} C/m^3\)

The velocity of the protons is 566 km/s = 566,000 m/s. Therefore, the current density is:

\(J = pv = (2.077\times10^-11 C/m^3) \times (566,000 m/s) = 1.176\times10^{-5} A/m^2\)

(b) If Earth's magnetic field did not deflect the protons, the total current Earth would receive can be calculated as the product of the current density and the cross-sectional area of the Earth facing the Sun. The radius of the Earth is 6.371 × \(10^6\) m, so the area is:

\(A = \pi r^2 = \pi (6.371\times10^6 m)^2 = 1.277\times10^{14} m^2\)

Therefore, the total current is:

\(I = JA = (1.176\times10^-5 A/m^2) \times (1.277\times10^{14} m^2) = 1.501\times10^9 A\)

So if Earth's magnetic field didn't deflect the protons, it would receive a current of about 1.5 billion amperes from the solar wind.

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The phenomenon in hearing that is analogous to spatial frequency channels in vision is critical bands. Hence, the correct option is A: Critical bands.

Critical bands are regions of the audible frequency range in which a complex sound is divided into individual, discrete frequency bands by the human auditory system.

For instance, when different frequencies in a complex sound, such as a musical instrument or a human voice, are picked up by the ear, they are sent to the brain via various channels that respond to specific frequencies.

These channels are referred to as critical bands. The frequency range of these bands varies depending on the loudness of the sound.

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Power frequency interference in ECG recording can be caused by a variety of external sources. It can be generated by electrical motors, transformers, spark gaps, electrical wiring, and fluorescent lights typically found in clinical settings.  

The limitations of a sphygmomanometer is inaccuracy and use error.

Power frequency interference is also created by electric utilities, such as electrical lines, generating stations, and telecommunication systems. Even defibrillators and pacemakers can generate power frequency interference, if not properly shielded. The sphygmomanometer is primarily used to measure a patient’s blood pressure, which is an indication of the force of the circulating blood against the walls of the arteries.

This device utilizes an inflatable cuff and a manometer, or pressure gauge, to measure the patient’s systolic and diastolic blood pressures. The accuracy of the sphygmomanometer readings is dependent on the skill and experience of the user, as incorrect cuff size and improper inflation and deflation techniques will produce inaccurate results.

In addition to this, sudden changes in a person’s blood pressure or movement can also cause inaccurate readings. Lastly, sphygmomanometers cannot detect changes in blood viscosity, and will not provide readings for arterial-venous evaluations.

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C. If a car has a westward acceleration, the car moving east and slowing down.

Westward acceleration is the acceleration of an object directed towards the west of the object's motion.

The acceleration of an object is defined as the change in the velocity of an object with time.

Mathematically, the acceleration of an object is given as;

a = Δv/Δt

where;

a = (v - u) /t

where;

When the car is slowing down, it implies that the final velocity is smaller compared to the initial velocity.

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Ocean waves are considered a renewable resource.

Renewable resources are natural resources that can be replenished in a relatively short period of time. Unlike nonrenewable resources, such as fossil fuels, renewable resources are not depleted when used and can be replenished naturally. Ocean waves are generated by the wind and can be used to generate energy through wave energy converters, which convert the energy from the ocean waves into electricity. The use of ocean waves for energy generation is considered a renewable energy source because the wind that generates the waves is an endless resource.

Ocean waves are created by the wind blowing over the surface of the ocean, causing the water to move in a repeating pattern known as wave motion. The energy from the wind is transferred to the water, causing it to move up and down in a wave pattern. Ocean waves can vary in size and frequency, with larger waves having more energy and a greater potential for energy generation.

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Answer:

I don't know but focus on that she ways less so she will have a higher velocity

Answer:

\(30 \div 33750 = 0.008888\)