a projectile is fired horizontally with an initial speed of 57 m/s. what are the horizontal and vertical components of its displacement 3.0 s after it is fired?

The Musculoskeletal system is typically assessed from head to toe and from general to specific. It is option A.

Deformities, side-to-side differences in symmetrical comparison, limitations in movement, and skin changes like rashes, ecchymosis, erythema, and edema will all be looked for in a musculoskeletal system assessment.

They help you move, maintain your posture, and support the weight of your body when used together.

For human health, the musculoskeletal system is very important. The musculoskeletal system not only provides the body with movement and structure, but it also serves as an exercise-stimulated endocrine system. It additionally cooperates with different organs in the body through biochemical flagging.

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Before opening her chute, Suzie Skydiver would experience a force of air pressure of approximately 450 N at terminal velocity.

Terminal velocity is the point where the force of air resistance, or drag, acting on the skydiver becomes equal in magnitude to the force of gravity pulling the skydiver down. At this point, the net force acting on the skydiver is zero, and they fall at a constant velocity. At terminal velocity, Suzie Skydiver is falling at a constant rate, meaning that the force of gravity pulling her down is balanced by the force of air resistance pushing her up.

This force of air resistance, also known as drag, can be calculated using the formula:

F = 1/2 * rho * v^2 * Cd * A,

where F is the force of drag, rho is the density of the air,

v is the velocity of the object,

Cd is the drag coefficient

A is the cross-sectional area of the object.

Assuming that Suzie Skydiver falls in a typical skydiving posture with a drag coefficient of around 1.0 and a cross-sectional area of 1.0 square meter,

Using the standard atmospheric density of 1.2 kg/m³,

We can calculate that her terminal velocity is approximately 54 m/s.

At this velocity, the force of air resistance, or drag, acting on Suzie Skydiver is equal in magnitude to the force of gravity, which is approximately 450 N.

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Answer:

At the point of dropping the object, by Newton's first law due to gravitational force \(F_g\) = m × g, accelerates

By Newton's Second law the object reaches impacts on the air with the gravitational force resulting in changing momentum of m×(Final Velocity - Initial Velocity)

As the velocity increases, the rate of change of momentum becomes equivalent to the gravitational force and by Newton's third law, the action action and reaction are equal and opposite hence they cancel each other out

The body then moves at a constant uniform motion down according to Newton's first law

Explanation:

At the point the object of mass, m, is dropped from the height of the tower, the only force acting on the object is the gravitational force such that the object has an acceleration which is the acceleration due to gravity, g, and the gravitational force is therefore = m × g

As the speed of the object increases while the object is falling with the gravitational acceleration the rate at which the object cuts through layers of air which (by Newton's first law of motion, are at rest ) has some buoyancy effect also increases therefore, the object is constantly increasingly changing the momentum of the air which by Newton's second law results, at an high enough velocity, and by Newton's third law, in a force equal to the applied gravitational force

Therefore, the force of the air drag becomes equal to the gravitational force, cancelling each other out and the object then moves according to Newton;s first law, in uniform motion of a constant speed while still falling down.

Answer:

Increasing the number of loops of wire around the iron core

Hope this helps!

Answer:

Explanation:

first you would need the height of the building in meters then using the formula calculate 32 m/s ÷ the height of the building in meters and you will get your answer

Given three identical metallic spherical objects have individual charges of, q1 = -9.612 nC,

q2 = +3.204 nC,

and q3 = +6.408 nC.

If the three objects are brought into contact with each other at the same time and then separated, the final net charge on q1, q2, and q3 will be calculated as follows;

Initial total charge, Q = q1 + q2 + q3

Q= -9.612 nC + 3.204 nC + 6.408 nC

Q= -0.002 nC

The final net charge on q1, q2, and q3 is same as they are identical:

q1 + q2 + q3 = -0.002 nC

q1 = q2 = q3 = -0.002 nC/3

q1 = -0.0006667 nC

Therefore, the final net charge on q1, q2, and q3 is -0.0006667 nC.The charge on q1 before and after is -9.612 nC and -0.0006667 nC respectively. The difference is the number of electrons that were removed from/added to q1. The number of electrons can be calculated as follows;

Charge on an electron,

e = 1.6 ×\(10^{-19\) C

Total number of electrons removed from

q1 = [(final charge on q1) - (initial charge on q1)] / e

q1 = [-0.0006667 - (-9.612)] / 1.6 × \(10^{-19\)

q1 = 6.0075 × 1013

The number of electrons removed from q1 is 6.0075 × 1013, and electrons were removed from q1. Thus, option d is,

"The number of electrons that were removed from q1 = 6.0075 × 1013 electrons were removed from q1."

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Answer:

I believe that Law is called the Law of Conservation of Energy (Thermodynamics)

Explanation:

Answer:

Reena

Explanation:

200 / 5 = 40 metres in a minute

200 / 4 = 50 metres in a minute,

Therefore Reena is faster

Answer: its b because  as soon as you go far away from light it get red and dents

Explanation:

Answer:

Using the formulas \(\frac{v^2}{r}=\alpha \\\) and \(v= \frac{2\pi r}{T}\) ,combine them to get:

\(\frac{(\frac{(2\pi r)}{T})^2}{r} = \alpha\)

solve for α, where α is centripetal acceleration, T is period in seconds, and r is radius.

\(\frac{17418.895^2}{4.22*10^8} = \alpha \\0.72 = \alpha\)

Answer:

\(28\; {\rm kg \cdot m\cdot s^{-1}}\).

Explanation:

The impulse on an object is equal to the change in momentum.

By the conservation of momentum, the total momentum of this system will stay unchanged. In other words, the sum of the change in the momentum of the wall and the projectile will be \(0\):

\(\Delta p(\text{projectile}) + \Delta p(\text{wall}) = 0\).

Rearrange to obtain:

\(\Delta p(\text{wall}) = -\Delta p(\text{projectile})\).

The change in the momentum of the projectile is:

\(\begin{aligned} & \Delta p(\text{projectile}) \\ &= m(\text{projectile}) \, \Delta v(\text{projectile}) \\ &= (2.0\; {\rm kg})\, ((8.0 - (-6.0))\; {\rm m\cdot s^{-1}}) \\ &= 28\; {\rm kg\cdot m\cdot s^{-1}} \end{aligned}\).

The change in the momentum of the wall would then be:

\(\Delta p(\text{wall}) = -\Delta p(\text{projectile}) = -28\; {\rm kg\cdot m\cdot s^{-1}}\).

Thus, the magnitude of the impulse on the wall would be \(28\; {\rm kg\cdot m\cdot s^{-1}}\).

One statement that is not true is that UV radiation is a type of electromagnetic radiation. It is also a type of ionizing radiation. UV radiation is actually a form of non-ionizing radiation.

UV radiation, or ultraviolet radiation, is a type of electromagnetic radiation that falls between visible light and X-rays on the electromagnetic spectrum. It is often categorized into three types: UVA, UVB, and UVC. Unlike ionizing radiation, such as X-rays and gamma rays, which have enough energy to remove tightly bound electrons from atoms or molecules, UV radiation lacks the necessary energy to ionize atoms or molecules. Instead, it primarily interacts with the outermost electrons of atoms or molecules, leading to chemical reactions and causing biological effects.

UV radiation is commonly associated with sunlight and has various effects on living organisms and materials. It can cause sunburn, premature aging of the skin, and an increased risk of skin cancer. Exposure to excessive UV radiation can also damage the eyes and impair the immune system. It is important to protect oneself from excessive UV exposure by wearing sunscreen, protective clothing, and sunglasses.

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The average pressure exerted on the square panel can be calculated using the formula for pressure:

Pressure = Force / Area

In this case, the force is exerted by the signal, and the area is the size of the square panel.

To find the force, we need to know the power of the signal. Let's assume the power of the signal is P. The force can be calculated using the equation:

Force = Power / Speed of Light

The speed of light is approximately 3.00 x 10⁸ meters per second.

Now, let's substitute the values into the equation. Since the square panel is 1.00 cm on a side, the area is (1.00 cm)² = 1.00 cm².

So, the force exerted on the panel is:

Force = P / (3.00 x 10⁸ m/s)

And the average pressure exerted on the panel is:

Pressure = Force / Area

Now, we can calculate the average pressure. Let's assume the power of the signal is 10 watts (W):

Force = 10 W / (3.00 x 10⁸ m/s) = 3.33 x 10⁻⁸ N

Pressure = (3.33 x 10⁻⁸ N) / (1.00 cm²)

To convert cm₂ to m², we divide by 10,000:

Pressure = (3.33 x 10⁻⁸ N) / (1.00 cm²/ 10,000) = 3.33 x 10^-6 N/m²

Therefore, the average pressure exerted by the signal on the square panel is 3.33 x 10^-6 N/m².

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Answer:

half or time for half the nuclei to decay.

Explanation:

The society’s Gini index has shifted from 0.57 to 0.34. This shift indicates a reduction in income inequality within the society.

A society's Gini index is a measure of income inequality within that society. The Gini index ranges from 0 to 1, with 0 indicating perfect equality (where everyone has the same income) and 1 indicating maximum inequality (where one person has all the income). In the given scenario, A decrease in the Gini index suggests that income distribution has become more equal over time.

A change from 0.57 to 0.34 signifies that the income gap between different individuals or groups within the society has narrowed. It implies that a larger portion of the population now shares a more balanced distribution of wealth and income. This reduction in income inequality can be the result of various factors, such as government policies, economic reforms, social programs, or changes in the labor market. Overall, a decrease in the Gini index from 0.57 to 0.34 reflects a positive shift towards a more equal distribution of income within the society, indicating improved socioeconomic conditions for a larger segment of the population.

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Answer:

Answer:

balloon is rigid the amount of gas is constant inside the interior pressure of the balloon is constant and in these cities it becomes equal to or slightly higher than atmospheric pressure

Explanation:

Este ejercicio es referente a la mecánica de fluidos, usemos la expresión para la presión  

       P = ρ g h

En es el caso del balón  usemos la presión en la pared extrema, llamemos P la presión por el gas en el interior y P_ext la presión atmosférica del lugar

        cuando se llena el valor en una ciudad de baja altura la presión atmosférica es mas alta

          P_int1 < P_ext1

por lo cual la pared del balón no se mantiene rígida.

Cuando el balón es trasladado a una ciudad con mayor altura sobre el nivel del mar la presión exterior disminuye

       P_ext2 = ρ g h₂ < P_ext1

en promedio la presión disminuye con la altura  en 0,029 atm cada 250 m

por lo tanto como la cantidad de gas es constante en el interior la presión interior del globo es constante y en esta ciudades se hace igual o un poco mayor que la presión atmosférica, en consecuencia la pared del globo esta rígida

        P_int2 >P_ext2

Traslate

This exercise is related to fluid mechanics, let's use the expression for pressure

       P = ρ g h

In the case of the balloon, let's use the pressure on the extreme wall, let's call P the pressure for the gas inside and P_ext the atmospheric pressure of the place

        when the value is filled in a low-lying city the atmospheric pressure is higher

          P_int1 <P_ext1

therefore the wall of the ball does not remain rigid.

When the ball is transferred to a city with higher altitude above sea level, the external pressure decreases

       P_ext2 = ρ g h <P_ext1

on average the pressure decreases with height by 0.029 atm every 250 m

therefore as balloon is rigid the amount of gas is constant inside the interior pressure of the balloon is constant and in these cities it becomes equal to or slightly higher than atmospheric pressure, therefore the wall of the

        Pint 2> Pe

Seismic waves show a sudden increase at the Mohorovicic discontinuity, also known as the Moho, because of the change in the properties of the Earth's crust at that boundary. The Moho is the boundary that separates the Earth's crust from the underlying mantle.

When seismic waves travel through the Earth, they encounter different layers with varying densities and properties. At the Moho, there is a significant change in the composition and density of rocks, which leads to a marked increase in seismic wave velocity.

The increase in seismic wave velocity at the Moho is primarily attributed to the transition from the relatively less dense and more elastic crust to the denser and more rigid mantle. The crust is primarily composed of lighter rocks like granites and basalts, while the mantle consists of denser materials such as peridotite. The change in rock composition and density causes seismic waves to propagate faster in the mantle compared to the crust.

This sudden increase in seismic wave velocity at the Moho allows seismologists to identify and map the boundary between the Earth's crust and mantle. The study of these seismic wave reflections and refractions provides valuable insights into the structure and composition of the Earth's interior.

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Answer:

kinetic energy and low friction

Explanation:

if the book is still move there is kinetic energy but the friction is no slowing the book down there for low friction, ur welcome

The book will experience a frictional force(Sliding), an applied force by me, and a net force. I will experience a net force, a static frictional force while pushing the book.

Here we are experiencing Newton's 1st law of motion.

It is given by Issac Newton and is also known as the law of inertia.

It states that the object is going to be at rest or it is going to be in uniform motion in a straight line until and unless any external force is applied to it.

For example:-

1. If a ball is laying at rest on the ground without moving it will be at rest until any external force is not applied to it.

2. If an object is in motion it will continue to be in motion with constant speed in a particular direction until an unbalanced force is not applied to it.

We will experience one more force here i.e., Inertia.

The Interior is a property by which a body tries to maintain its state whether it is at rest or in uniform motion.

Inertia is directly proportional to the mass of the body

There are three types of Inertia:-

Frictional Force:- It is the force acting on the body to resist its action of motion in a particular direction.

Applied force:- It is the force applied to the body by another body/object.

Net force:- It is the sum of all the forces which are/are acting on the body at a particular time.

Static frictional Force:- A force due to which a body keeps its stationary position on the surface is known as static frictional force.

Hence, the book will experience frictional force, applied force, and net force and I will experience a net force and Static frictional force respectively.

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Answer:

bro we cant do this

Explanation:

Answer:

The energy resource brought into a coal power plant is coal.

Found the answer at: https://www.tva.com/energy/our-power-system/coal/how-a-coal-plant-works#:~:text=Coal%2Dfired%20plants%20produce%20electricity,to%20start%20the%20process%20over.

The waste produced by coal power plants is coal ash and the energy produced by coal power plants is electricity.

Answers found at: http://www.groundtruthtrekking.org/Issues/AlaskaCoal/Coal-Ash-Combustion-Wastes.html       and        https://www.tva.com/energy/our-power-system/coal/how-a-coal-plant-works#:~:text=Coal%2Dfired%20plants%20produce%20electricity,to%20start%20the%20process%20over.

The two laws of thermodynamics apply to what I found out in my research because I know that the entropy increase due to the combustion of conventional fuels is much larger than that resulting from that of nuclear fuels, and is therefore much more dangerous. Also, I know that heat is used to burn coal and create energy.

Found answer at: https://www.encyclopedie-energie.org/en/energy-consumption-and-entropy-release-in-the-biosphere/

Explanation:

Hope this helps, i got an okay score on it but better than nothing i guess lol

The radius comparison between Earth and a stellar black hole can be estimated using the Schwarzschild radius formula.

To compare the size of Earth to that of a stellar black hole, we need to determine the radius of the black hole. However, without specific information from the table you mentioned, we can't perform an exact calculation. Instead, I can provide a general understanding of the scale difference between Earth and a stellar black hole.

A stellar black hole is formed from the collapse of a massive star. The radius of a black hole is determined by its event horizon, which is the boundary beyond which nothing can escape its gravitational pull. For simplicity, let's assume we have a stellar black hole with a mass of 10 times that of the Sun (2x10^31 kg).

To find the approximate radius of this black hole, we can use the Schwarzschild radius formula:

Rs = (2GM) / c^2

Where:

Rs is the Schwarzschild radius,

G is the gravitational constant (6.67430 × 10^-11 m^3 kg^-1 s^-2),

M is the mass of the black hole,

c is the speed of light (299,792,458 m/s).

Substituting the values into the equation:

Rs = (2 * 6.67430 × 10^-11 * 2x10^31) / (299,792,458)^2

Calculating the expression will give us the approximate radius of the stellar black hole.

Once we have the radius of the Earth (4,000 miles or 6,437 km), we can compare the two values to determine how many times larger in radius Earth is compared to the stellar black hole. However, please note that without the specific data from the table, this calculation will be an estimation.

If you can provide the specific values or data from the table, I can perform a more accurate calculation and provide a more precise comparison between Earth and a stellar black hole.

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Answer:

The ratio of the potential difference across a metallic conductor to the current in the conductor is known as.

B. Resistance.

Explanation:

According to ohms law   " the current  passing through a conductor is directly proportional to the potential difference between the ends provided the temperature of the wire remains constant".

What is resistance ?

Resistance is a measure of the opposition to current flow in an electrical circuit

what is a resistor ?

a resistor is a n electric conductor which forms resistance to free flow of electric current, the resistance is measured in Ω

The ratio of the potential difference across the conductor to the current is called resistance

It is defined as the ratio of the potential difference across the conductor to the current. The resistance is measured in Ω.

\(R = \dfrac VI\)

Where,

\(R\) - resistance

\(V\)- voltage (Potential difference)

\(I\) - current

Therefore, the ratio of the potential difference across the conductor to the current is called resistance.

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The International System of Units (SI) is a globally accepted standard system to measure length, temperature, time, amount of substance, and mass. It provides a consistent framework for measuring fundamental physical quantities.

The SI system ensures uniformity and facilitates accurate and reliable communication of measurements across different disciplines and regions.

By establishing precise definitions and internationally agreed-upon units, such as the meter, Kelvin, second, mole, and kilogram, the SI system enables scientists, engineers, and researchers worldwide to conduct experiments, make accurate calculations, and exchange data with ease and precision.

Its widespread adoption promotes compatibility, comparability, and coherence in the field of measurement.

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Answer:

(B) salaries

Explanation:

correct on edg2020

a) The number of moles of helium in the container is approximately 0.002848 mol.

b) The new temperature that causes the absolute pressure of the helium to increase to 5.525 bar (assuming constant volume) is approximately 925.565 K.

c) The absolute pressure of the helium when the volume of the container changes to 34.4 L (assuming isothermal process) is approximately 0.002208 atm.

d) The new volume of the container when the helium's temperature decreases to 43 ºC by an isobaric process is approximately 34.1285% of the initial volume, or 0.0344 m^3 * 0.341285 ≈ 0.011760 m³.

a) To calculate the number of moles of helium in the container, we can use the ideal gas law:

PV = nRT

Where:

P = pressure (in atm)

V = volume (in m³)

n = number of moles

R = ideal gas constant (0.0821 L·atm/mol·K)

T = temperature (in Kelvin)

P = 2.208 atm

V = 0.0344 m³

T = (145.4 - 32) / 1.8 + 273.15 = 369.261 K (converted from ºF to Kelvin)

Rearranging the equation, we have:

n = PV / RT

n = (2.208 atm * 0.0344 m³) / (0.0821 L·atm/mol·K * 369.261 K)

n = 0.002848 moles

Therefore, the number of moles of helium in the container is approximately 0.002848 mol.

b) To calculate the new temperature that causes the absolute pressure of the helium to increase to 5.525 bar (which is 5.525 atm), we can use the ideal gas law again:

P1 / T1 = P2 / T2

Where:

P1 = initial pressure (2.208 atm)

T1 = initial temperature (369.261 K)

P2 = final pressure (5.525 atm)

T2 = final temperature (unknown)

Rearranging the equation, we have:

T2 = T1 * (P2 / P1)

T2 = 369.261 K * (5.525 atm / 2.208 atm)

T2 = 925.565 K

Therefore, the new temperature that causes the absolute pressure of the helium to increase to 5.525 bar (assuming constant volume) is approximately 925.565 K.

c) To calculate the absolute pressure of the helium when the volume changes to 34.4 L (converted from 0.0344 m³) by means of an isothermal process, we can use the ideal gas law:

P1 * V1 = P2 * V2

Where:

P1 = initial pressure (2.208 atm)

V1 = initial volume (0.0344 m^3)

P2 = final pressure (unknown)

V2 = final volume (34.4 L)

Rearranging the equation, we have:

P2 = (P1 * V1) / V2

P2 = (2.208 atm * 0.0344 m³) / 34.4 L

P2 = 0.002208 atm

Therefore, the absolute pressure of the helium when the volume of the container changes to 34.4 L (assuming isothermal process) is approximately 0.002208 atm.

d) If the helium's temperature decreases to 43 ºC (which is 316.15 K) by an isobaric process (constant pressure), we can use the ideal gas law again to calculate the new volume:

V1 / T1 = V2 / T2

Where:

V1 = initial volume (unknown)

T1 = initial temperature (925.565 K)

V2 = final volume (unknown)

T2 = final temperature (316.15 K)

Rearranging the equation, we have:

V2 = (V1 * T2) / T1

Since the process is isobaric, the pressure remains constant, and we can use the ratio of the temperatures:

V2 = (V1 * 316.15 K) / 925.565 K

Simplifying further:

V2 = V1 * 0.341285

Therefore, the new volume of the container when the helium's temperature decreases to 43 ºC by an isobaric process is approximately 34.1285% of the initial volume, or 0.0344 m³ * 0.341285 ≈ 0.011760 m³.

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Answer:

moving water

Explanation:

its called hydropower its a form of renewable energy that uses moving water

A mountain or hill that remains when adjacent areas have eroded to lower levels is a residual hill or monadnock.Buttes were created through the process of erosion, the gradual wearing away of earth by water, wind, and ice. Buttes were once part of flat, elevated areas of land known as mesas or plateaus. In fact, the only difference between a mesa and a butte is its size.

Mesas are formed by erosion, when water washes smaller and softer types of rocks away from the top of a hill. The strong, durable rock that remains on top of a mesa is called caprock. A mesa is usually wider than it is tall. Mesas are usually found in dry regions where rock layers are horizontal. Fast Fact

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Answer:

true

Explanation:

People also ask

How many pounds of sugar does the average human eat in a year?

152 pounds

Today, the average American consumes almost 152 pounds of sugar in one year. This is equal to 3 pounds (or 6 cups) of sugar consumed in one week! Nutritionists suggest that Americans should get only 10% of their calories from sugar. This equals 13.3 teaspoons of sugar per day (based on 2,000 calories per day).

Answer:

exposing it to a flame to see if it catches on fire

Explanation:

A chemical property is when the matter changes into a different substance. This is true when you expose it to a flame because if a substance is burned, it will change into a new substance. All the other options are examples of physical changes.

-I also took the quiz and got 100%

Hope this helps!

Nutrition is the study of the nutrients found in food, how the body utilizes the nutrients. The matching can be done as

vitamin A = Carrots

saturated fat = butter

trans fat = doughnut

Sodium = Salt

Nutrition is the study of the nutrients found in food, how the body utilizes the nutrients, and how diet affects health and illness. Nutritionists research how foods influence the human body using ideas spanning molecular biology, biochemistry, as well as genetics.

In addition, nutrition studies how individuals may utilize their food to lower their risk of developing disease, what occurs when they take excessive or inappropriate amounts of a nutrient, as well as how allergies operate. But at the other hand, nutrients nourish the body. The matching can be done as

vitamin A = Carrots

saturated fat = butter

trans fat = doughnut

Sodium = Salt

Therefore, the matching can be done as

vitamin A = Carrots

saturated fat = butter

trans fat = doughnut

Sodium = Salt

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