gretchen runs the first 4.0 km of a race at 5.0 m/s. then a stiff wind comes up, so she runs the last 1.0 km at only 4.0 m/s.

Answer:

Your a genius!

Explanation:

The average impact force on the ram is 250,000 N.

It is given to us that -

The weight of the pile driver is given as 2500 N

The pile driver ram falls at a height of 10 m

The post travels 0.1 m into the ground as a result of the pile driver

We have to find out the average impact force on the ram.

We know, with constant force, work can be represented as -

\(W=Force * distance\) ---- (1)

where,

F = force applied in (N - m)

d = distance for which the force is applied

Similarly, the potential energy of a system can be represented as -

\(Potential Energy = mgh\)

where,

m = mass of the system

g = acceleration due to gravity

h = height travelled by the system

Since weight, weight = mass * g, we can write the above formula for potential energy as -

\(Potential Energy = weight * height\)  ----- (2)

Now, according to the given information in the problem, the work done by the post should be equal to the potential energy of the pile driver.

So, from equations (1) and (2), we can say that -

\(W = Potential Energy\\= > Force * distance = weight * height\\= > F * 0.1 = 2500 * 10\\= > F = \frac{2500 * 10}{0.1}\\ = > F = 250,000 N\)

Thus, the average impact force on the ram is 250,000 N.

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The question is fishing for "balanced force".

But the description in the question is terrible.

Answer:

The height of the cliff is approximately 127.31 meters

Explanation:

The given parameters are;

The upward speed of the ball = 30 m/s

The time after the ball is thrown before it lands = 9 s

We have;

The time to maximum height;

v = u - g·t

Where;

v = The velocity at maximum height = 0 m/s

u = Initial velocity = 30 m/s

g = The acceleration due to gravity = 9.81 m/s²

∴ 0 = 30 - 9.81 × t

t = 30/9.81 = 3.06 s

The maximum height can be obtained from;

v² = u² - 2·g·s

v = 0 m/s

u² = 2·g·s

30² = 2 × 9.81 × s

s = 30²/(2×9.81) = 45.87 m

The time from maximum height to landing = 9 - 3.06 = 5.942 s

The height to landing

s = u·t + 1/2·g·t².

Here, u = 0 m/s

s = 0×5.942 + 1/2×9.81×5.942² = 173.1766 m

s = 173.1766 m.

The height of the cliff = 173.1766 m. - 45.87 m. ≈ 127.31 m.

The critical angle for light traveling from the liquid back into the air is 42.0°.

The critical angle is the angle of incidence in the first medium (air) at which all of the light is refracted into the second medium (liquid).

The formula for the critical angle is:

sin(c) = n₂/n₁

where:

c is the critical angle

n₂ is the index of refraction of the second medium

n₁ is the index of refraction of the first medium

In this case:

n₁ = 1.00

n₂ = 1.33

Substituting these values into the formula:

sin(c) = 1.33/1.00

c = sin⁻¹(1.33/1.00)

c = 42.0°

Therefore, the critical angle for light traveling from the liquid back into the air is 42.0°.

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it would be on the right end I believe. Forgive me if I am incorrect.

Answer:

i guess u could pick "B" :)

Explanation:

Answer:

hmmmmm

Explanation:

I am gonna say D.

if I am right plz give me a brainliest

Solve the given problem as

The object is known as buleshift.

Object is a type of thing that can be seen or touch but it's is never alive .

When an object is moving to the  away from us, the light from the object is known as if the  redshift, and when an the  object is moving to the  towards us, the light from to  the object is known as of the  blueshift. Astronomers use by the  redshift and blueshift to deduce how far an object is away from Earth, in the  concept of key to charting by its  the universe's expansion.

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The final equilibrium temperature (in °C) of the system when ice and water vapor are combined can be calculated using the principle of energy conservation and the specific heat capacities of ice and water.

To determine the final temperature, we can apply the equation:

(m₁ * c₁ * ΔT₁) + (m₂ * c₂ * ΔT₂) = 0

Where:

- m₁ is the mass of ice (22.0 kg)

- c₁ is the specific heat capacity of ice (2.09 J/g·°C)

- ΔT₁ is the change in temperature of ice (final temperature - 0.00 °C)

- m₂ is the mass of water vapor (4.80 kg)

- c₂ is the specific heat capacity of water (4.18 J/g·°C)

- ΔT₂ is the change in temperature of water (final temperature - 100.0 °C)

Solving for the final temperature, we find:

(22.0 kg * 2.09 J/g·°C * ΔT₁) + (4.80 kg * 4.18 J/g·°C * ΔT₂) = 0

Substituting the given values, we can solve for ΔT₁ and ΔT₂. Once we have those values, we can find the final temperature by adding ΔT₁ to 0.00 °C.

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The relationship between the speed of light and the refractive index of a medium is essential in understanding the propagation of light in different materials.

The refractive index (n) of a medium is defined as the ratio of the speed of light in vacuum (c) to the speed of light in the medium (v). Mathematically, n = c/v. When light passes through a medium, it slows down due to interactions with atoms or molecules in the material, resulting in a decrease in speed compared to its velocity in a vacuum. The refractive index determines how much light is bent or refracted as it enters a different medium, impacting phenomena like refraction, reflection, and dispersion. This relationship plays a crucial role in various applications, such as optics, telecommunications, and the study of wave behavior in different media.

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--The complete Question is, What is the relationship between the speed of light and the refractive index of a medium, and how does it affect the propagation of light in different materials?--

Since a 1.03 × 10² mA current is used to charge up the parallel plate capacitor and a large square piece of paper is placed between the plates and parallel to them so it sticks out on all sides, the value of ∫B.ds around the perimeter of the paper is 1.29 × 10⁻⁷ Tm

This shows the relationship between the magnetic field, B, the path of integration, ds and the current enclosed by the magnetic field, i.

Ampere's law is given mathematically as

∫B.ds = μ₀i where

Given that for the large square piece of paper, the current used to charge the capacitor is

Since ∫B.ds = μ₀i

Substituting the values of the variables into the equation, we have

∫B.ds = μ₀i

∫B.ds = 4π × 10⁻⁷ Tm/A × 1.03 × 10⁻¹ A

∫B.ds = 4.12π × 10⁻⁸ Tm

∫B.ds = 12.94 × 10⁻⁸ Tm

∫B.ds = 1.294 × 10⁻⁷ Tm

∫B.ds ≅ 1.29 × 10⁻⁷ Tm

So, the value of ∫B.ds around the perimeter of the paper is 1.29 × 10⁻⁷ Tm

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Answer:

Linear motion, also called rectilinear motion, is one-dimensional motion along a straight line, and can therefore be described mathematically using only one spatial dimension.

Explanation:

Rotation around a fixed axis is a special case of rotational motion. The fixed-axis hypothesis excludes the possibility of an axis changing its orientation and cannot describe such phenomena as wobbling or precession

Explanation:

Refer the explanation in the picture

The work done in pumping all the liquid out of the tank is 2500π lb-ft.

The potential energy of an object is given by the formula:

PE = mgh

Given:

Density of oil = 50 lb/ft^3

Diameter of the tank = 10 ft ( r = 5 ft)

To calculate the work done, we need to find the mass of the oil and the height it is lifted. Let's start by finding the mass:

Volume of oil in the tank:

The volume of a hemisphere = (2/3) * π * (r^3)

Volume = (2/3) * π * (5^3) = (2/3) * π * 125 = 250π/3 ft^3

Mass of the oil:

Mass = Volume * Density = (250π/3) * 50 lb

Now, we need to find the height of the tank. For a hemisphere, the height is equal to the radius (5 ft).

Finally, we can calculate the work done:

Work = PE = mgh = (250π/3) * 50 lb * 5 ft

Work = (250π/3) * 50 * 5 lb-ft

       = 2500π lb-ft

So, the work done in pumping all the liquid out of the tank is approximately 2500π lb-ft.

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Answer:

Tha valency of Oxygen is 2 because it need two atom of hydrogen to form water.

Answer:

because it gains two electrons to become a stable state.

Answer:

a

Explanation:an example An astronaut in space has the same mass as he does on earth while having different ... Newton's Second Law of Motion: Force = mass x acceleration ... Push less to move it (use less force.) ... Gravity has an effect on an object in the vertical direction only.

Answer:

it is a greater

Explanation:

hope it helps

Example of an elastic product: Smartphone

Explanation: A smartphone is an example of an elastic product. When the price of smartphones decreases, consumers tend to buy more of them, and when the price increases, consumers tend to buy fewer.

Example of an inelastic product: Prescription medication

Explanation: Prescription medication is an example of an inelastic product. Inelastic goods are those for which changes in price have little impact on the quantity demanded.

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The CRO (Cathode Ray Oscilloscope) will display a triangular wave that is vertically stretched and horizontally compressed.

The vertical deflection plates will cause the triangular wave to be displayed with a peak-to-peak amplitude of\(100 cm (50 V * 0.1 cm/V)\), while the horizontal deflection plates will cause  sawtooth wave to be displayed with a peak-to-peak amplitude of \(5000 cm (100 V * 0.02 cm/V).\) The synchronization of the two inputs will ensure that the triangular wave and the sawtooth wave are displayed in a coordinated manner, with each cycle of the sawtooth wave corresponding to five cycles of the triangular wave. The resulting display will show a pattern of diagonal lines that gradually rise and then quickly drop back to the starting position, with each line representing a cycle of the sawtooth wave.

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The equation will be of the given statement:

y(x,t)  = (0.084)sin(18x - 5.2t)

The distance a wave travels from one crest to another or from one trough to another is known as its wavelength (which may be an electromagnetic wave, a sound wave, or any other wave). The peak of the wave is called the crest, while the trough is its base.

wavelength  = 35cm = .35m

amplitude A =  8.4 cm

Time  = 1.2s

The speed of this wave:

In the positive x direction, the wave is moving in a string. For these circumstances, we must write the wave equation.

When the wave is moving in the +x direction, the following general equation describes it:

Y = Asin( kx - wt )

A is amplitude

k is propagation constant

k = 2π/λ

k = 2π/0.35

k = 17.95 = 18m^-1

ω is angular frequency

ω = 2π/T

ω = 2π/1.2

ω = 5.23s^-1

The equation will be:

y(x,t)  = (0.084)sin(18x - 5.2t)

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I understand that the question you are looking for is:

A wave traveling in a string in the positive x direction has a wavelength of 35 cm, an amplitude of 8.4 cm, and a period of 1.2 s. What is the wave equation (in base SI units) that correctly describes this wave

Because the number of electrons and protons in a neutral atom is the same, this atom's charge is zero.

The number of electrons in a neutral atom is the same as the number of protons. In the case of this atom, there are 19 electrons and 20 protons, resulting in a charge of +1. This atom is a cation since it has more protons than electrons.The atomic number of an element is determined by the number of protons in its nucleus, and it is represented by the symbol Z. The total number of protons and neutrons in an atom's nucleus is called its mass number, and it is represented by the symbol A. The number of neutrons in an atom can be determined by subtracting the atomic number (Z) from the mass number (A).In this particular atom, there are 20 protons and 15 neutrons. The mass number is 20 + 15 = 35. The atomic number, on the other hand, is 20. As a result, this element is a neutral atom with 20 electrons.

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Since the object is experiencing free fall, if you ignore air resistance, the time it will take the container to fall 300m to the ground is 7.82 seconds.

Any motion of a body in which gravity is the only force acting on it is referred to as free fall.

The object dropped from the airplane is experiencing free fall.

Ignoring air resistance, the only force acting on the container is the force of gravity which accelerate the container by a constant value.

The time taken for the object to reach the ground is determined using the formula of an object  experiencing free fall as given below:

s = ut + ¹/₂gt²

where

h is the height above the ground = 300 m

u is the initial vertical velocity of the container and is equal to zero since the object starts from rest.

g is the acceleration of gravity = 9.8 m/s²

t is the time = ?

The equation above becomes;

h = ¹/₂gt² since u is zero

Solving the equation for t:

t = √2h/g

t = √2 * 300 / 9.8

t = 7.82 seconds.

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Complete question:

A 415-kg container of food and water is dropped from an airplane at an altitude of 300m. First, consider the situation ignoring air resistance. Then calculate the more realistic situation involving a drag force provided by a parachute.

1. If you ignore air resistance, how long will it take the container to fall 300m to the ground?

1c 2c 3a 4a 5d

Explanation:

I just know.

ur welcome.

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Answer:

3 meters

Explanation:

add up dum boi

The given problem involves calculating the image distance and image height of an object placed in front of a convex mirror, given the object's height and the mirror's radius of curvature.

Specifically, we are asked to determine the distance and height of the image formed by the mirror.

To calculate the image distance and image height, we need to use the mirror equation, which relates the object distance, image distance, and focal length of the mirror. The mirror equation can be expressed as 1/f = 1/d_o + 1/d_i, where f is the focal length, d_o is the object distance, and d_i is the image distance.Using the given parameters and the mirror equation, we can calculate the image distance of the object formed by the convex mirror.

Overall, the problem involves applying the principles of optics to calculate the image distance and image height of an object placed in front of a convex mirror. It requires an understanding of the mirror equation, magnification equation, and how these equations relate to the object distance, image distance, object height, image height, and focal length of the mirror.

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Answer:true

Explanation:

The correct order of the formation of the solar system are:

A solar system consist of the sun and other planetary bodies revolving around the sun. Sun is the center of the energy where other planets derive their energies from.

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