A 0.10-kg ball, traveling horizontally at 25 m/s, strikes a wall and rebounds at 19 m/s. what is the magnitude of the impulse on the ball during the rebound?

To get the distance of an echo that equals 17m, you need to know the speed of sound and the time it takes for the echo to bounce back.

The speed of sound in air is approximately 343 meters per second. So, to calculate the time it takes for the sound to travel to the object and back, you need to divide the distance by the speed of sound.

Here's the formula:
Time = Distance / Speed of Sound

So, if you want to find the time it takes for sound to travel to the object and back and reach your ears as an echo, you can use this formula.
Time = 17m / 343 m/s
Time = 0.0496 seconds

This means that it takes approximately 0.0496 seconds for the sound to travel to the object and back, and for the echo to reach your ears. Keep in mind that this calculation assumes that the sound waves travel directly to and from the object, without any obstructions or other factors that could affect the speed or distance of the sound.

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Metamorphic rock: A rock changed by heat, pressure, and fluids.

Foliation: Parallel alignment of platy grains.

Burial metamorphism: A process that changes rock because of pressure with equal intensity from all sides.

Parent rock: The original rock before it metamorphoses.

Metamorphic rock: A rock changed by heat, pressure, and fluids. The word metamorphic means change in form. Metamorphic rocks are made by rocks that have been altered in some way. This can happen through heat, pressure, and fluids. Examples of metamorphic rocks include slate, gneiss, and marble.

Foliation: Parallel alignment of platy grains. Foliation is a term used to describe the parallel alignment of platy grains in a metamorphic rock. This is caused by pressure during metamorphism. The platy grains can be minerals like mica or clay.

Burial metamorphism: A process that changes rock because of pressure with equal intensity from all sides. Burial metamorphism is a process that changes rock because of pressure with equal intensity from all sides. This can happen when rocks are buried deep within the earth's crust.

Parent rock: The original rock before it metamorphoses. The parent rock is the original rock before it metamorphoses. This rock is changed into a metamorphic rock through the process of metamorphism.

To summarize, metamorphic rock is a rock that has been changed by heat, pressure, and fluids. Foliation refers to the parallel alignment of platy grains. Burial metamorphism is a process that changes rock because of pressure with equal intensity from all sides. The parent rock is the original rock before it metamorphoses.

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By considering building a system of two positive charges: The work done by an external agent is negative.

Any attempt by an outside force to combine two positive charges would be harmful. This is done in order to overcome the electrical force that now opposes the movement of the two positive charges toward one another. Negative work is defined as an effort made to control a disagreeable factor. However, if the two positive charges are already close to one another and the external agent operates to separate them, the work done would be beneficial. This is due to how weak the electrical force that holds the two positive charges together becomes when they are separated, necessitating the aid of an outside force. When work done to separate charges, it is viewed favorably. It's important to keep in mind that the concept of work includes all kinds of forces, not only electrical ones. The sign of the work generated by an external source is determined by the force's direction and the charges' displacement. If both the force and the displacement are travelling in the same direction, the work is positive. If the force and displacement are moving in the opposite directions, the work is negative.

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Answer:

The tangential acceleration is 0 m/s².

Explanation:

Answer:

The tangential acceleration is 0 m/s².

Explanation:

Answer:

The man has at most 1.54 seconds to get out of the way.

Explanation:

To determine the time it takes for the cement block to fall from a certain height, we can use the equation for free fall: h = (1/2)gt²

where h is the height, g is the acceleration due to gravity (approximately 9.8 m/s²), and t is the time.

In this scenario, the height from which the cement block falls is 71.5 m - 20.0 m = 51.5 m.

By rearranging the equation and solving for t, we have: t = √(2h / g)

t = √(2 * 51.5 m / 9.8 m/s²) ≈ 3.08 s

However, the man only has to consider the time it takes for the block to fall from a height of 20.0 m, which is given by:

t' = √(2 * 20.0 m / 9.8 m/s²) ≈ 1.54 s

Therefore, the man has at most 1.54 seconds to get out of the way.

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Answer:

Explanation:

Let mass of cart be m₁ and m₂

m₁ + m₂ = 1.5 kg

At the time of release , their momentum will be conserved

m₁ v ₁ = m₂ v₂

m₁ v ₁ = (1.5 - m₁ ) x 2 v₁

m₁ = 3 - 2m₁

3m₁ = 3

m₁ = 1 kg

m₂ = .5 kg

Answer:

I guess i would say the microscope

Explanation:

Because of the microscope, we can see the cells.

Answer: 2.5 ML

Explanation:

10 ÷ 10 = 1

25 ÷ 10 = 2.5

The volume of 1 coin is 2.5 ML

In the absence of air resistance, the launch angle of the projectile results in the longest range is found to be 45°.

The launch angle may be defined as the vertical angle at which the ball leaves a player's bat after being struck. Average Launch Angle (aLA) is calculated by dividing the sum of all Launch Angles by all Batted Ball Events.

The angle between an input ray and the fiber axis. If the end face of the fiber is perpendicular to the fiber axis, the launch angle is equal to the angle of incidence. The angle of a projectile's initial velocity is definitely calculated when measured from the horizontal direction. These angles are typically 90° or less.

Therefore, in the absence of air resistance, the launch angle of the projectile results in the longest range is found to be 45°.

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No, the sun cannot explain global warming. Global warming is a phenomenon in which the temperature of the Earth's surface and atmosphere is rising continuously due to human activities such as deforestation, burning of fossil fuels, and industrialization.

This increase in temperature cannot be explained only by an increase in solar radiation.There are several factors which contribute to global warming, including greenhouse gases such as carbon dioxide, methane, and water vapor. These gases trap heat in the Earth's atmosphere, which causes the planet's temperature to rise. The sun's radiation does contribute to global warming, but it is not the main cause.

i) To calculate the increase in solar radiation that would cause the Earth to warm up by 1 K, we can use the following formula:ΔS = ΔT / αWhere ΔS is the increase in solar constant, ΔT is the increase in temperature, and α is the Earth's albedo (reflectivity).α = 0.30 is the standard value used for the Earth's albedo.ΔS = ΔT / αΔS = 1 K / 0.30ΔS = 3.33 W/m2So, to explain the increase in temperature of 1 K over the last hundred years, the solar constant would need to increase by 3.33 W/m2.

ii) The observed fluctuation of the solar constant over the past 400 years has been around 0.1% to 0.2%. This is much smaller than the 3.33 W/m2 required to explain the increase in temperature of 1 K over the last hundred years. Therefore, it is unlikely that the sun is the main cause of global warming.

The sun cannot explain global warming. While the sun's radiation does contribute to global warming, it is not the main cause. The main cause of global warming is human activities, particularly the burning of fossil fuels, which release large amounts of greenhouse gases into the atmosphere.

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Answer: Use the x/t = v formula!!! x is distance, t is time, and v is velocity. you just need to do 40 / 5 = 8 and 100 / 15 = 6.66

According to the given statement Mrs. Brown's electricity bill for the current month is $5000.00.

To calculate Mrs. Brown's electricity bill for the current month, we need to determine the total number of kilowatt-hours (kWh) she has consumed and apply the corresponding rates.

1. Calculate the electricity usage:

  Current meter reading - Previous meter reading
  20,300 kWh - 17,800 kWh = 2,500 kWh

2. Determine the cost for the first 2000 kWh:

  $1.00/kWh * 2000 kWh = $2000.00

3. Determine the cost for the remaining kWh:

  500 kWh * $3.50/kWh = $1750.00

4. Add the fuel adjustment charge:

  $0.50/kWh * 2500 kWh = $1250.00

5. Calculate the total bill:

  $2000.00 + $1750.00 + $1250.00 = $5000.00


To calculate the electricity bill, we first find the difference between the current and previous meter readings.

In this case, Mrs. Brown used 2,500 kWh.

For the first 2000 kWh, the cost is $1.00 per kWh, resulting in a charge of $2000.00.

For the remaining 500 kWh, the cost is $3.50 per kWh, totaling $1750.00.

Additionally, a fuel adjustment charge of $0.50 per kWh is added to the bill. This amounts to $1250.00.

Finally, we add up all the charges to get the total bill, which is $5000.00.

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a) The inductance of the solenoid is approximately 0.0068 H.

b) The energy stored in the inductor is approximately 0.012 J.

a) The inductance (L) of an air-core solenoid can be calculated using the formula L = (μ₀n²A) / ℓ, where μ₀ is the permeability of free space (4π × 10⁻⁷ T·m/A), n is the number of turns, A is the cross-sectional area of the solenoid, and ℓ is the length of the solenoid.

To calculate the cross-sectional area, we need the diameter (d) of the solenoid. The formula for the cross-sectional area of a circle is A = (π/4)d². Given the diameter, we can calculate the cross-sectional area.

Using the given values of the number of turns, length, diameter, and the constants μ₀ and π, we can calculate the inductance of the solenoid.

b) The energy stored in an inductor (W) can be calculated using the formula W = (1/2)LI², where L is the inductance of the solenoid and I is the current flowing through the wire.

Using the calculated value of the inductance from part a and the given current, we can calculate the energy stored in the inductor.

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Answer:

i think the products have four hydrogen atoms and two oxygen atoms and the reactants have the same atoms in two molecules of h2o

Answer: (a) Z-score are 1 and -1.2 for northern and southern regions, respectively.

Explanation: Z-score is how many standard deviations a data is from the population mean or how far a data point is from the mean.

The z-score is calculated by the following:

\(z=\frac{x-\mu}{\sigma}\)

where

x is the data point

μ is population mean

σ is standard deviation

For the northern region birds:

μ = 10, σ = 3, x = 13

\(z=\frac{13-10}{3}\)

z = 1

The z-score for birds living in the northern region is 1, which means it is 1 standard deviation above the mean.

For the southern region:

μ = 16, σ = 2.5, x = 13

\(z=\frac{13-16}{2.5}\)

z = -1.2

The z-score for southern living birds is -1.2, meaning it is 1.2 standard deviations below the mean.

Answer:

Mass = 0.04 Kg

Explanation:

Given the following data;

Density = 800 kg/m³

Volume = 5 * 10^{-5} m³

To find the mass of the object;

Density can be defined as mass all over the volume of an object.

Simply stated, density is mass per unit volume of an object.

Mathematically, density is given by the formula;

\( Density = \frac {mass}{volume} \)

Making mass the subject of formula, we have;

\( Mass = density * volume \)

Substituting the values into the formula, we have;

\( Mass = 800 * 5 * 10^{-5} \)

Mass = 0.04 Kg

Answer:

F = 70000  N

Explanation:

Given that,

Mass of a car, m = 1400 kg

Initial speed of the car, u = 15 m/s

Finally, it hits the ground, v = 0

Time, t= 0.3 s

We need to find the force experienced by the car. Using Newton's second law of motion to find it.

F = ma

a is acceleration of the car.

\(F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{1400\times (0-15)}{0.3}\\\\=-70000\ N\)

So, the force experienced by the car has a magnitude of 70000  N.

Answer:

128.8Km/h

Explanation:

S=d/t

 =64.4/0.5

 =128.8

Using the free body diagram, let's determine the scenario the diagram illustrates.

From the free body diagram, we can see that the weight is acting on the object while the tension will be the force which supports the object.

The tension in this case, helps hang the object while the weight is the product of the mass of the object and the force of gravity acting on the object.

Tension can be defined as the pulling force transmitted through a rope or string.

Therefore, the best scenario which is represented by the free body diagram is a sign board supported by two strings.

ANSWER:

A signboard supported by

A collection of numbers variables operation symbols and grouping symbols such as 2(8x-15) is an: Expression.

This collection of numbers, variables, operation symbols, and grouping symbols is an algebraic expression. Algebraic expressions are used in mathematics to represent a mathematical statement. In the expression 2(8x-15), the 2 is a constant, 8x and -15 are the variables, the ( ) indicate grouping of terms, and the x is an operation symbol which represents multiplication.

Evaluating an algebraic expression means to solve the expression for its numerical value. This algebraic expression can be solved by multiplying 8x and -15 together, then multiplying the answer to that by the constant 2, giving us 8x-30. Therefore, 2(8x-15) is equal to 8x-30. Algebraic expressions are important to mathematics as they are used to express relationships between numbers, variables, and operations in equations.

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The normal force felt by the box has magnitude

F[normal] = (1 kg) g = 9.8 N

so that the maximum magnitude of static friction is

F[s. friction] = 0.8 F[normal] = 7.84 N

In order to get the box to move, (C) a minimum force of 7.84 N is required.

Answer:

c

Explanation:

what poping

Answer:

Explanation:

Equation for translational kinetic energy = 1/2 m V² where m is mass and V is velocity .

In first case let mass of car be m

Translational kinetic energy = 1/2 m x 40² = 800 m .

In the second case ,

Translational kinetic energy = 1/2 m x 20² = 200 m

So , in former case kinetic energy of car is 4 times that of second case.

The brain is part of the central nervous system because it sends the signals out to the nerves.

option A.

The central nervous system is made up of the brain and spinal cord.

The brain controls how we think, learn, move, and feel.

The spinal cord carries messages back and forth between the brain and the nerves that run throughout the body.

Thus, we can conclude that the brain itself does not contain nerves, but it sends the signals out to the nerves hence it is part of the central nervous system.

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Answer:

yes

Explanation:

The amount of force applied by individual man to balance the force at the right is 73.2 N.

The amount of force applied by individual man to balance the force at the right is calculated as follows;

\(F_{right} = F_{left}\\\\F_{left} = F_1 + F_2 + F_3 + F_4 + F_5\\\\F _1 = F_2 = F_3 = F_4 = F_5\\\\F_1 = \frac{F_{right}}{5} = \frac{366}{5} = 73.2 \ N\)

Thus, the amount of force applied by individual man to balance the force at the right is 73.2 N.

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Answer: Speed

Explanation:

Speed is Defined as defined as D/T or distance over time

The Given statement " is the electron density consistent with equal weights for the two resonance structures for o3 ? " is false. Because, Ozone has two resonance structures, where the double bond can be located on either of the two terminal oxygen atoms.

In Ozone, each oxygen atom has six valence electrons, and each oxygen atom in the resonance structures has a formal charge of zero. But whereas the double bond in one resonance form is shared by two oxygen atoms, it is shared by a different pair of oxygen atoms in the other resonance structure. As a result, the resonance structure with the double bond shared by the two terminal oxygen atoms has a larger electron density and is more stable.

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--The complete Question is, Is the electron density consistent with equal weights for the two resonance structures for o3 ?
True or false --