An 85kg man is jogging with a velocity of 2.6m/s to the north .nearby a 65kg person is skateboarding and traveling with a velocity of 3m/s north .which person has greater momentum show your calculations

Physical activity in hot and humid environments challenges the body because it creates additional stress on the body's thermoregulatory system.

Here are some specific reasons why:

1. Increased heat stress: Hot and humid environments elevate the ambient temperature and humidity, making it harder for the body to dissipate heat. The body relies on evaporative cooling through sweating to maintain a stable core temperature. However, in high humidity, sweat evaporation is reduced, hindering the body's ability to cool down effectively. This can lead to increased heat accumulation and an increased risk of heat-related illnesses such as heat exhaustion or heatstroke.

2. Elevated heart rate and cardiovascular strain: Engaging in physical activity in hot and humid conditions requires the body to work harder to maintain its core temperature. This increased effort places additional demands on the cardiovascular system, as the heart must pump more blood to deliver oxygen to the working muscles and help dissipate heat. The combination of elevated core body temperature and increased cardiovascular strain can lead to higher heart rates and potential cardiovascular stress.

3. Dehydration: Sweating is the body's primary mechanism for cooling down in hot environments. However, in humid conditions, the sweat doesn't evaporate as efficiently, leading to increased fluid loss without a corresponding decrease in body temperature. This can lead to dehydration if fluid losses are not adequately replenished. Dehydration negatively affects physical performance, impairs thermoregulation, and increases the risk of heat-related illnesses.

4. Electrolyte imbalances: Sweat contains not only water but also electrolytes such as sodium, potassium, and chloride. In hot and humid environments, increased sweating can result in greater electrolyte losses. These electrolytes are essential for maintaining proper nerve and muscle function. Imbalances in electrolyte levels can lead to muscle cramps, fatigue, and impaired physical performance.

5. Reduced exercise capacity: The combined effects of increased heat stress, cardiovascular strain, dehydration, and electrolyte imbalances can significantly reduce exercise capacity in hot and humid conditions. It becomes harder for the body to sustain high-intensity physical activity, resulting in decreased endurance, reduced power output, and slower recovery times.

To mitigate the challenges posed by physical activity in hot and humid environments, it is crucial to prioritize proper hydration, adequate rest breaks, wearing lightweight and breathable clothing, and acclimating gradually to the conditions.

Additionally, being aware of the signs and symptoms of heat-related illnesses and taking appropriate measures to cool down and seek medical attention if necessary are essential for maintaining safety and well-being during exercise in hot and humid environments.

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The current flowing in each circuit arrangement depends on the total resistance of the circuit.

To calculate the total resistance of each circuit, we can use the formula:

Total Resistance = R1 + R2 + R3

a. To create a current of 1 ampere, we can use the following circuit:

  (check image 1)

b.  To create a current of 2 amperes, we can use the following circuit:

(check image 2)

The total resistance of this circuit is:

1 ohm + 2 ohm + 1 ohm = 4 ohms

Using Ohm's Law, we can calculate the voltage required to create a current of 2 amperes:

V = IR

V = 2A x 4 ohm = 8V

Therefore, we need to connect three batteries in series to create a voltage of 4.5V, and another three batteries in series to create a voltage of 4.5V, and connect both sets of batteries in parallel to create a voltage of 9V.

c. To create a current of 3 amperes, we can use the following circuit:

(check image 3)

The total resistance of this circuit is:

1 ohm + 1 ohm + 1 ohm = 3 ohms

Using Ohm's Law, we can calculate the voltage required to create a current of 3 amperes:

V = IR

V = 3A x 3 ohm = 9V

Therefore, we need to connect all four batteries in series to create a voltage of 6V, and then connect two sets of these batteries in parallel to create a voltage of 12V.

d. To create a current of 6 amperes, we cannot use these components as they will create a circuit with a total resistance of less than 0.25 ohms, which will exceed the maximum current that can flow through the components and may damage them. In order to create a circuit with a higher resistance that can handle a current of 6 amperes, we would need to add additional resistors in series with the bulbs.

For example, we could add a 1 ohm resistor in series with the 3 ohm bulb to create a circuit with a total resistance of 7 ohms:

(check image 4)

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Answer:

Astronomers led by Eduardo Bañados of the Max Planck Institute for Astronomy have discovered a gas cloud that contains information about an early phase of the galaxy and star formation, merely 850 million years after the Big Bang.

Explanation:

Answer:

Gravitational force.

Electric force.

Magnetic force.

Nuclear force.

Frictional force.

Answer: In a battery, voltage determines how strongly electrons are pushed through a circuit, much like pressure determines how strongly water is pushed through a hose. Most AAA, AA, C, and D batteries are around 1.5 volts. Imagine the batteries shown in the diagram are rated at 1.5 volts and 500 milliamp-hours.

Explanation: Today "AA" is frequently used as a size designation, irrespective of the battery's electrochemical system. The main numbers used for the most common NiMH and NiCad battery

To produce a voltage of 1.5 V with a Voltaic pile, we would need either two zinc pennies and one copper nickel or one zinc penny and three copper nickels.

A Voltaic pile is an early type of battery that consists of alternating discs of two different metals (such as copper and zinc) separated by cardboard soaked in an electrolyte solution. Each pair of metal discs and cardboard makes up one cell of the battery, and the voltage of the battery depends on the number of cells connected in series.

To calculate how many pennies and nickels would be needed to produce a voltage of 1.5 V, we need to consider the voltage generated by each cell and the number of cells required to achieve a total voltage of 1.5 V.

One zinc penny produces approximately 1.1 volts, and one copper nickel produces approximately 0.5 volts. To get a total voltage of 1.5 V, we could arrange one zinc penny and one copper nickel in series, but this combination would produce a voltage of only 1.6 V (1.1 V + 0.5 V).

To get as close to 1.5 V as possible, we could use two zinc pennies and one copper nickel in series, which would produce a voltage of 1.7 V (1.1 V + 0.6 V).

Alternatively, we could use one zinc penny and three copper nickels in series, which would also produce a voltage of 1.5 V (1.1 V + 0.4 V + 0.5 V + 0.5 V).

Therefore, To produce a voltage of 1.5 V with a Voltaic pile, we need either two zinc pennies and one copper nickel or one zinc penny and three copper nickels.

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Explanation:

Thermal conductivity is a measure that refers to the rate at which heat is transferred by conduction through a unit cross-section area of a material.

or in simpler terms how well a substance conducts heat.

its formula is seen in the attachment. hope this helps.

Answer: B) zero because both objects are at rest

Explanation:

Given the following :

Mass of anchor = 10kg

Mass of boat = 1000kg

Note : both boay and anchor are at rest, this gives a Velocity of zero

The momentum of a body is given as the product of Mass and velocity, that is,

Momentum = mass × velocity

Initial Momentum of anchor-boat system =

(mass of boat× initial velocity of boat) + (mass of anchor × initial velocity of anchor)

Initial Velocities of boat and anchor = 0

Therefore,

Initial momentum = (1000 × 0) + (10 × 0)

Initial momentum = (0 + 0) = 0

This is ecause both objects are at rest.

Answer:

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According to the given information A support force that completely balances the weight of an object at rest.

The normal force is another name for a support force. With the same amount of power as the book's downward weight, the table pushes up on the book. A support force—the upward force that balances an object's weight on a surface—holds the book steady on the table.

Pull force attributed to another item, such as "Pull attributed to Steve." The force here is identical to the push force, but it is directed at the thing that is pulling. Support force resulting from the ground (or from the object's surface): When two solid surfaces come in contact with one another, support force arises.

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The complete question is -

What is a support force ?

The answer is choice 1.

This question is more common sense than science. Think about it, all the other boys for the other choices have their hearing blocked/reduced. But the boy in choice 1 is just sitting there, of course he will be the only one to hear it. But still, 1km is pretty far away for hearing.

The correct ranking of these three cylindrical metal rods from stiffest to stretchiest is option C) 2, 1, 3.

A Rod is a single flexible metal strand or rod that is typically cylindrical in shape. Wires are used to carry electrical currents, telecommunications signals, and mechanical loads. The process of drawing metal through a hole in a die or draw plate to create wire is ubiquitous in stiffest to stretchiest .

A Rod with a smaller cross section should have a lower electrical resistance than a wire with a greater length and vice versa. The material a wire is made of ought to have an impact on its electrical resistance as well.

In other words, it becomes two of itself in series, and series resistance rises when we double the length to double the resistance. The cross sectional area doubles or grows four times as fast as the diameter. The reciprocal of the total of the reciprocals, or 1/4 for four equal resistances, is used to determine parallel resistances. As a result, the item's resistance doubles as the cable's length does. As a result, resistance is inversely proportional to cross-sectional area and directly proportional to object length so  (2, 1, 3).

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Answer:

The Sun derives all its energy from a fusion cycle. In that process, tiny hydrogen molecules combine into a continuous proton-proton chain to create larger helium nuclei. The above figure illustrates the fusion of hydrogen into helium.

Explanation:

Hope this helps.

Answer:

nuclear fusion

Explanation:

In this process, small hydrogen molecules fuse together to form bigger helium nuclei in a continuous proton-proton chain.

Answer:

Explanat WRITE A ONE PAGE ESSAY TO EXPLAIN THE AUTHOR'S PURPOSE IN WRITING HOM SMART ARE ANIMAL

Answer:

The sun is not shrinking or expanding at present because it is in a state of equilibrium, meaning that the forces that govern its size and temperature are balanced. The sun's immense gravity pulls inwards, while the heat generated by nuclear fusion pushes outwards, and these forces are perfectly balanced, maintaining the sun's current size and temperature. Although the sun is constantly losing mass through its solar wind, this loss is minimal and does not significantly affect the sun's size or stability. Therefore, the sun will remain in this equilibrium state for millions of years until it exhausts its nuclear fuel and enters the next phase of its life cycle.

The voltage that is required to run the train is found to be 12V.

Since the transformer has 600 turns in the primary coil and 60 turns in the secondary coil, the turns ratio is 600:60, which simplifies to 10:1. To find the voltage required to make the train run, we need to use the turns ratio equation,

Vp/Vs = Np/Ns, The voltages of the primary and secondary coils are Vp and Vs, respectively. The primary coil has Np turns, while the secondary coil has Ns turns.

We know that the household voltage supplied to the train is 120 V, which is the voltage in the primary coil (Vp). We want to find the voltage in the secondary coil (Vs). Substituting the values we know into the turns ratio equation, we get,

120/Vs = 10/1

Simplifying this equation, we get,

Vs = 12 V

Therefore, the voltage required to make the train run is 12 V.

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Answer:

2,3,1

Explanation:

There are 3 laws of Kepler.

First law = The path of each planet around the sun is an ellipse with the sun at one focus.

Second law =  As a planet moves in its orbit, a line from the sun to the planet sweeps out equal areas in equal times.

Third law = The ratio of the squares of the periods of any two planets revolving around the sun is equal to the ratio of the cubes of their average distance from the sun.

Hence, the correct order for Kepler's law is: 2,3,1

Answer:

Joules

Explanation:

The unit for Energy is Joules, which is equal to kg m²/s².

The gravitational potential energy is calculated as:

Where m is mass (kg), g is gravity (m/s²) and h is the height (m). So, the unit of the potential energy is:

Therefore, the answer is joules.

A minimal time period is required to accelerate through x=3.00m because maximal static friction produces the force that creates maximum acceleration.

acceleration is the rate of change in both direction and speed of velocity over time. When anything moves faster or slower in a straight line, it is said to have been accelerated. Because of direction is always shifting, motion on a circle accelerates even while the speed is constant.

A person moves by the help of frictional force, as a result of gtound reaction. So, the formula for frictional force is:

F = μR

where,

F = frictional force

μ = coefficient of friction

R = Normal Reaction = Weight of Body = W = mg

Therefore,

F = μmg

but, from Newton's 2nd Law of Motion:

F = ma

Comparing both equations, we get:

μmg = ma

a = μg   ---------- equation (1)

Now, to calculate the distance moved by a body, we use 2nd equation of motion:

s = (Vi)(t) + (0.5)at²

using equation (1), we get:

s = (Vi)(t) + (0.5)μgt²

where,

s = distance moved by body

Vi = initial velocity of body

t = time taken to cover the distance

g = acceleration due to gravity

(a)

Vi = 0 m/s

g = 9.8 m/s²

s = 3.2 m

μ = 0.5

t = ?

Therefore,

3.2 m = (0 m/s)(t) + (0.5)(0.5)(9.8 m/s²)t²

t² = 3.2 m/(0.5)(0.5)(9.8 m/s²)

t = √1.30612 s²

t = 1.14 s

(a)

Vi = 0 m/s

g = 9.8 m/s²

s = 3.2 m

μ = 0.5

t = ?

Therefore,

3.2 m = (0 m/s)(t) + (0.5)(0.5)(9.8 m/s²)t²

t² = 3.2 m/(0.5)(0.5)(9.8 m/s²)

t = √1.30612 s²

t = 1.14 s

(a)

Vi = 0 m/s

g = 9.8 m/s²

s = 3.2 m

μ = 0.87

t = ?

Therefore,

3.2 m = (0 m/s)(t) + (0.5)(0.87)(9.8 m/s²)t²

t² = 3.2 m/(0.5)(0.87)(9.8 m/s²)

t = √0.75 s²

t = 0.87 s

The rate of change in displacement is known as velocity. Acceleration is the rate at which speed changes. The fact that velocity contains both magnitude and orientation makes it a vector quantity. Acceleration is also a vector quantity since it is simply the rate during which velocity varies.

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Answer:

Approximately \(2.69\; {\rm A}\).

Explanation:

Ensure that all values are measured in standard units. Charge should be measured in coulombs, while time should be measured in seconds:

\(\begin{aligned}t &= 3.0\; {\rm hr} \times \frac{3600\; {\rm s}}{1\; {\rm hr}} = 10800\; {\rm s}\end{aligned}\).

Electric current \(I\) is the rate of flow of electric charge.

In order to find the electric current, divide electric charge \(q\) by the time \(t\) required to transfer these charge. If charge \(q\!\) is measured in coulombs and time \(t\!\) is measured in seconds, the unit of current \(I\)would be amperes:

\(\begin{aligned}I & = \frac{q}{t} \\ &= \frac{29000\; {\rm C}}{10800\; {\rm s}} \approx 2.69\; {\rm A}\end{aligned}\).

Answer: B

Explanation:

The y component of the vector is given by the formula:

y component = magnitude of the vector x sin(angle between the vector and the y-axis)

In this case, the magnitude of the vector is 120 N and the angle between the vector and the y-axis is 50 degrees. So we have:

y component = 120 N x sin(50°) ≈ 92 N

Therefore, the answer is (B) 92 N.

Climate change and global warming are inter-connected to each other.

Global warming is the unusually rapid increase in Earth's average temperature due to the release of greenhouse gases while on the other hand, climate change refers to the change that occur in the temperatures and weather pattern.

The happening of global warming causes the climate change around the world so we can conclude that climate change and global warming are inter-connected to each other.

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Answer:

Below

Explanation:

The loss in potential energy (from dropping 5 m) will equal the gain in Kinetic energy

mgh = 1/2 m v^2    

m (9.81)(5) = kinetic energy at 5 m   <===== you will need to put in the mass

                                                                        to calculate the value in Joules

a ) The slowest and fastest object are object 2 and object 1 respectively

b ) In a vacuum chamber all objects will fall at the same time

c ) In normal conditions, a golf ball would land first.

a ) From the data taken from the table,

Object 1 lands after 1.1 s

Object 2 lands after 1.8 s

Object 3 lands after 1.3 s

Object 4 lands after 1.1 s

Eventhough object 1 and 4 land at same time, at 1 s mark object 4 has more height than object 1. So object 1 would land first

b ) If conducted in a vacuum chamber, there will be no air resistance,. So all the objects will fall at the same time.

c ) In normal conditions, there will be air resistance. So air resistance will be larger in the object with larger surface area. Feather has a larger surface area than a golf ball. So feather will fall slower than the golf ball.

Therefore,

a ) The slowest and fastest object are object 2 and object 1 respectively

b ) In a vacuum chamber all objects will fall at the same time

c ) In normal conditions, a golf ball would land first.

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1: Average tangential acceleration = (12 m/s - 0 m/s) / 3.3 s ≈ 3.64 m/s²

2: radius = 3.64 m/s² / 11 rad/s² ≈ 0.331 m

3: θ = 0.5 * 11 rad/s² * (3.3 s)² ≈ 59.67 radians

4: The ant has traveled approximately 19.78 meters along the arc of the tire during the given time interval.

1: The average tangential acceleration of the tire can be determined using the formula:

Average tangential acceleration = (final tangential velocity - initial tangential velocity) / time

Given that the ant's speed increases from zero to 12 m/s in 3.3 seconds, the initial tangential velocity is 0 m/s and the final tangential velocity is 12 m/s. Plugging these values into the formula, we get:

Average tangential acceleration = (12 m/s - 0 m/s) / 3.3 s ≈ 3.64 m/s²

2: The radius of the tire can be determined using the formula:

Average tangential acceleration = rotational acceleration * radius

Given that the rotational acceleration of the wheel is 11 rad/s² and the average tangential acceleration is 3.64 m/s², we can rearrange the formula to solve for the radius:

radius = average tangential acceleration / rotational acceleration

Plugging in the values, we get:

radius = 3.64 m/s² / 11 rad/s² ≈ 0.331 m

3: The angle the ant has turned during this time interval can be calculated using the formula:

θ = 0.5 * rotational acceleration * (time)²

Plugging in the given values, we get:

θ = 0.5 * 11 rad/s² * (3.3 s)² ≈ 59.67 radians

4: The distance the ant has traveled along the arc during this time interval can be calculated using the formula:

Distance = radius * θ

Plugging in the values, we get:

Distance = 0.331 m * 59.67 radians ≈ 19.78 meters

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The average power developed by the boy during the climb is approximately 29.4 W.

In physics, the amount of energy transferred or converted per unit time is called power.

total height = number of steps x height of each step

total height = 30 x 0.15 m = 4.5 m

Given, time = 60 s

As power = work done / time

work done = force x distance

force = mass x gravity

mass is boy's mass (40 kg) and gravity is acceleration due to gravity (9.81 m/s²).

force = 40 kg x 9.81 m/s² = 392.4 N

The distance that the boy moves is equal to the total height that he has climbed: distance = total height = 4.5 m

work done = force x distance

work done = 392.4 N x 4.5 m = 1765.8 J

power = work done / time

power = 1765.8 J / 60 s

power ≈ 29.4 W

Therefore, the average power developed by the boy during the climb is approximately 29.4 W.

As for the anomalous behavior of water, water has a higher boiling point and melting point as compared to other substances with similar molecular weight. This is due to the strong hydrogen bonding between water molecules, which requires more energy to break the bonds and change the state of water from solid to liquid to gas.

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To determine the value of ΔSsurr at 227 K, we need to use the equation ΔSsurr = -ΔH∘rxn/T. Plugging in the given values, we get ΔSsurr = -21.16 kJ/mol / (227 K) = -93.2 J/K⋅mol.

To predict whether or not the reaction is spontaneous at this temperature, we can use the equation ΔG∘ = ΔH∘rxn - TΔS∘rxn, where ΔG∘ is the standard free energy change. Plugging in the given values, we get ΔG∘ = (21.16 kJ/mol) - (227 K)(-12.3 J/K⋅mol) = 2836.1 J/mol.

Since ΔG∘ is positive, the reaction is nonspontaneous at this temperature. Therefore, the correct answer is ΔSsurr = -93.2 J/K⋅mol, nonspontaneous.
To determine the value of ΔSsurr at 227 K and predict whether or not the reaction is spontaneous at this temperature, we first need to calculate the Gibbs free energy change (ΔG) using the formula: ΔG = ΔH - TΔS.

Given:
ΔH∘rxn = 21.16 kJ/mol (convert to J/mol: 21.16 * 1000 = 21160 J/mol)
ΔS∘rxn = -12.3 J/K⋅mol
T = 227 K

1. Calculate ΔG:
ΔG = 21160 J/mol - (227 K * -12.3 J/K⋅mol)
ΔG = 21160 J/mol + 2792.1 J/mol
ΔG = 23952.1 J/mol

2. Calculate ΔSsurr:
ΔSsurr = -ΔH∘rxn / T
ΔSsurr = -21160 J/mol / 227 K
ΔSsurr = -93.2 J/K⋅mol

3. Determine spontaneity:
Since ΔG > 0 and ΔSsurr is negative, the reaction is nonspontaneous at 227 K.

Therefore, the correct answer is: ΔSsurr = -93.2 J/K⋅mol, nonspontaneous.

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The correct answer is e. None of the above alternatives gives a true statement. None of the statements in options a, b, c, and d are true when it comes to a modulus M over a ring R having a finite basis.

When a modulus M can be formed entirely from a finite set of elements, the modulus M is said to be finitely generated. M's finite basis does not, however, automatically imply that M is finitely generated. A basis is a set of linearly independent elements, and it might not be enough to produce all of the components of the modulus.

According to the assertion in option b, M must include nonzero items of nonzero order if it has a finite basis. This is untrue, though. The smallest positive number k, such that the element raised to the power of k equals the identity element, is referred to as the order of an element.

According to option c, every non-null element in a modulus with a finite basis has a null. Nevertheless, this claim is likewise untrue. It is possible for a modulus with a finite basis to have non-null elements without a null element.

According to option d, a ring R is a body, or a field, and only then can a modulus have a finite basis. However, this assertion is also untrue. Even though the ring R is not a field, a modulus can nonetheless have a finite basis. None of the given alternatives provides a true statement about a modulus M over a ring R having a finite basis.

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Answer:

Explanation:

ummm depends on what test there talking like exircize test like 15 to 20 min and sports test like 3 to 2 hrs