A playground 82 ft long and 54 ft wide is to be resurfaced at a cost of $2.75 per sq ft. What will the resurfacing cost?Round to nearest integer or decimal

The Difference Between A Mile And A Nautical Mile is that mile is commonly used for terrestrial measurements, while the nautical mile is specifically used for navigation at sea.

A mile and a nautical mile are both units of measurement for distances, but there is a difference between the two. A mile is a standard unit of distance commonly used in the United States and is equal to approximately 1.609 kilometers. A nautical mile, on the other hand, is a unit of measurement used specifically for navigation at sea and is equivalent to 1.852 kilometers, or approximately 1.1508 miles.

In other words, a nautical mile is longer than a standard mile by about 0.1508 miles. This difference is important for navigation on the open sea, where a nautical mile provides a more accurate measure of distance, taking into account the curvature of the earth and the effects of latitude on measurements.

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The number of rubber bands that will cause an object with half the mass to accelerate six times as quickly is 6.

Newton's second law of motion is a quantitative depiction of the progressions that a power can create on the movement of a body. It expresses that the time pace of progress of the energy of a body is equivalent in both greatness and bearing to the power forced on it. The force of a body is equivalent to the result of its mass and its speed.

So,we have given some of parameters like,

The force applied to the object by the two rubber bands, according to newton second law of motion is

F = ma

2 = ma--------(eq1)

When the mass of the object is halved, the number of rubber bands required is calculated as;

2/ma=n/(m/2)×6a

=>2/ma=2n/6ma

=>n=(2/ma)×(6ma/2)

=>n=6

Hence,6 rubber bands will be needed.

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(Complete question) is:

Two rubber bands cause an object to accelerate with acceleration a. How many rubber bands are needed to cause an object with half the mass to accelerate six times as quickly?

Answer:

10 m to 1000 m

Explanation:

Using,

V = λf........... Equation 1

Where V = speed of electromagnetic wave, λ = wavelength, f = frequency

λ = V/f.......... Equation 1

Given: v = 3×10⁸ m/s, f = 3×10⁵ Hz to 3×10⁷ Hz

From the question,

The lowest wavelength is

λ' = 3×10⁸/3×10⁷

λ' = 10 m

While the highest wavelength is

λ = 3×10⁸/3×10⁵

λ  = 1000 m

Hence the range of wavelenths of the eave is 10 m to 1000 m

Answer:

friction

air drag

every thing that opposes the motion affects kinetic energy

Explanation:

kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest

potential energy ∝ 1/(kinetic energy)

as kinetic energy increases potential energy decreases

Answer:

IDC

Explanation:

I DON'T UNDERSTAND........

The minimum applied force that will keep the box at rest is 55 N.

The term frictional force refers to the force that opposes the motion of a body. We have the following information'

Given that;

μ = F/R

R = mgcosθ = 26.8 kg × 9.8 ms-2 × cos13 =255.9 N

F = μR

F =  0.215 × 255.9 N

F = 55 N

The minimum applied force that will keep the box at rest is 55 N.

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The current through the 5.00 ohm resistor will depend on the voltage applied and the total resistance of the circuit.

In general, the higher the voltage applied and the lower the total resistance, the higher the current through the 5.00 ohm resistor.

To determine how much current moves through the 5.00 ohm resistor, we would need to know the voltage across it. Using Ohm's Law, we can calculate the current as I=V/R, where I is the current, V is the voltage, and R is the resistance. If we assume that the voltage is applied across the entire circuit, we would need to calculate the total resistance of the circuit first.
Once we have the total resistance, we can use the voltage and resistance to calculate the current flowing through the circuit, including the 5.00 ohm resistor.

Without more information about the circuit, it is impossible to determine the current through the 5.00 ohm resistor.
In general, the higher the voltage applied and the lower the total resistance, the higher the current through the 5.00 ohm resistor.

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The correct answer is A) bent toward the normal. When a light ray moves from air into glass, which has a higher index of refraction, its path will be bent toward the normal. This is due to the fact that light travels more slowly in glass than in air and thus is bent at the interface between the two materials.

When a light ray passes from one medium to another, it can be refracted, or bent. This is due to the fact that the speed of light varies depending on the medium it is travelling through. When a light ray moves from a medium with a lower index of refraction, such as air, to a medium with a higher index of refraction, such as glass, its path will be bent toward the normal. This phenomenon is known as refraction, and it is an important part of optics and optical systems.

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How many electrons would have to be moved by one ball to the next in order to have a 1.00 x 104 N imbalance between them? 7.2 x 1010 is equal to fractional = n/ = (5.25 x 1015)/(72.8 x 1023).

In terms of physics, magnitude is just "distance or quantity." It demonstrates the size, direction, and speed of an item in both relative and absolute terms. It's used to indicate the size or scope of something. In physics, the term "magnitude" often refers to the a size or amount.

Calculation

m = mass of each aluminium sphere = 0.0250 kg = 0.0250 x 1000 g = 25 g

M = atomic mass = 26.982 g/mol

n = number of moles

Number of moles is given as

n = m/M

n = 25/26.982

n = 0.93

N₀ = Avogadro's number = 6.023 x 10²³

N = number of atoms

Number of atoms is given as

N = n N₀

N = (0.93) (6.023 x 10²³) = 5.6 x 10²³ atoms

= number of electrons per atom = 13

= total number of electrons

Total number of electrons are given as

=  N

= (13) (5.6 x 10²³)

= 72.8 x 10²³ electrons

b)

F = magnitude of electric force between the two spheres = 1 x 10⁴ N

r = distance between the spheres = 80 cm = 0.80 m

Q = magnitude of charge on each sphere = ?

Using Coulomb's law, force between the spheres is given as

F = k Q²/r²

inserting the values

1 x 10⁴ = (9 x 10⁹) Q²/(0.80)²

Q = 8.4 x 10⁻⁴ C

n = number of electrons removed

e = magnitude of charge on each electron

using the equation

Q = n e

8.4 x 10⁻⁴ = n (1.6 x 10⁻¹⁹)

n = 5.25 x 10¹⁵

c)

Fraction = n/  = (5.25 x 10¹⁵)/(72.8 x 10²³) = 7.2 x 10⁻¹⁰

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Answer: 69

Explanation: 160 divided by 2 is 69

Answer: Option C.

Explanation:

As the speed of plane increases and it moves forward it allows to push air on the bottom of the wings of the plane which results in increasing the pressure

The fact of air pressure on top of planes wing decreases with the increase bin plane's speed is based on Bernoulli’s Principle which states that with the fast moving air, the pressure decreases.

Therefore,n when the plane moves up it's wing pushes air down and on the same time the air pressure decreases at the top of the wing, this difference between the high and low pressure allows the flight to lift up.

Hence, the correct option is C.

The light ray will travel at an angle of approximately 26.8 degrees off of normal inside the plastic. When a light ray travels from air into a flat piece of plastic with an index of refraction of 1.30 at an angle of 44.5 degrees off the plane of the surface, it will refract and change direction.

The angle that the light ray will travel inside the plastic can be found using Snell's Law, which states that the ratio of the sines of the angles of incidence and refraction is equal to the ratio of the indices of refraction of the two media:

sin(θ1) / sin(θ2) = n2 / n1

where θ1 is the angle of incidence (measured from the normal), θ2 is the angle of refraction (also measured from the normal), n1 is the index of refraction of the first medium (in this case, air), and n2 is the index of refraction of the second medium (in this case, the plastic).

We are given θ1 = 44.5 degrees and n1 = 1 (since air has an index of refraction very close to 1). We are also given n2 = 1.30. Solving for θ2, we get:

sin(θ2) = n1 / n2 * sin(θ1) = 1 / 1.30 * sin(44.5 degrees) ≈ 0.442

Taking the inverse sine of both sides, we get:

θ2 ≈ 26.8 degrees

Therefore, the light ray will travel at an angle of approximately 26.8 degrees off of normal inside the plastic.

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The similarity between the last time the globe warmed and the climate change occurring today is that both are caused by the emission of greenhouse gases into the atmosphere.

Greenhouse gases trap heat from the sun in the atmosphere, causing the earth's temperature to increase. The difference between the two is that the current warming is happening much faster than the last time the globe warmed. This is largely due to the amount of greenhouse gases that have been released into the atmosphere since the industrial revolution. In addition, the current warming is affecting the global climate in more extreme ways than the last time the globe warmed, with more frequent and intense storms, droughts, and heatwaves.

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The system's internal energy in state b is equal to the system's internal energy in the state.

A thermodynamic system's internal energy is the energy that it holds. An isolated system has a constant internal energy level. It is the energy needed to build a system from scratch or to prepare it for its current internal condition. It includes the kinetic energy of the motion of the system's individual particles but not the system's overall kinetic energy. It keeps track of the system's energy gains and losses brought on by adjustments to its internal state. It is impossible to directly quantify internal energy. It is measured as a deviation from a standard state-defined reference zero.

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Assuming the point is located on the edge of a rotating wheel, we can use the formula v = rω, where v is the velocity, r is the distance from the center, and ω is the angular velocity. To find ω, we can use the formula ω = θ/t, where θ is the angle the wheel has rotated and t is the time it took.

Since the point on the edge of the wheel has traveled a distance of 2πr in one revolution, we can find θ by dividing the time by the period (the time for one revolution), which is 2π/ω. Putting it all together, we get v = rω = r(2π/ω)(ω/t) = 2πr/t. Plugging in r = 20 cm and t = 4 s, we get v = 31.4 cm/s. Therefore, the magnitude of the velocity of the point located at r = 20 cm from the center of the wheel after 4 s is 31.4 cm/s.

To find the magnitude of the velocity (speed) of a point located at r = 20 cm from the center of the wheel after 4 seconds, you'll need to use the formula v = ωr, where v is the linear velocity, ω is the angular velocity, and r is the radial distance. First, calculate the angular velocity by dividing the angle covered (in radians) by the time (in seconds). Then, multiply the angular velocity by the radial distance to get the linear velocity. Once you've found the linear velocity, you'll know the speed of the point after 4 seconds.

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The molar mass of a gas is molecular

⇒The molecular weight molar mass of any gas is the mass of one particle of that gas multiplied by Avogadro's number (6.02 x 1023). Knowing the molar mass of an element or compound can help us stoichiometrically balance a reaction equation.

The work done on the mass by the applied force f is approximately 0.052 J.

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The uses of fossil fuel causes:

Fossil fuels burn and increases in global temperature because it emits greenhouse gases. And the extreme climate change decreases biodiversity and last but not the least it increases pollution because burning of fuels emit gases like Carbon-dioxide etc...~

Answer:

All of the above

Explanation:

Fossil fuels burn causes combustion .

And we know combustion of hydrocarbons releases carbon dioxide .

Answer:

  C.  16.3 m/s

Explanation:

You want to know the final velocity of the combined mass of a 2130 kg car at 21.5 m/s after collision with a 2240 kg car at 11.4 m/s in the same direction. Momentum is conserved.

The momentum of each object is the product of its mass and velocity. When momentum is conserved, the momentum of the mass after the collision is the same as that before the collision.

  m1·v1 +m2·v2 = (m1 +m2)·v3

Then the velocity after the collision is ...

  v3 = (m1·v1 +m2·v2)/(m1 +m2)

You may recognize this as the weighted average of the initial velocities, where the weights are the respective masses of the objects.

  v3 = (2130·21.5 +2240·11.4)/(2130 +2240) ≈ 16.3

The final velocity is 16.3 m/s, matching choice C.

The correct option is B,  The force that opposes the effect of gravity and prevents the sun from collapsing is the thermal pressure generated by the heat and energy released by nuclear fusion in its core.

Nuclear fusion is a process in which two atomic nuclei combine to form a heavier nucleus, releasing a large amount of energy in the process. This occurs when the nuclei are brought close enough together that the strong nuclear force overcomes the electrostatic repulsion between positively charged protons.

In order for fusion to occur, the nuclei must be heated to extremely high temperatures and placed under high pressure. This is typically achieved using magnetic confinement in a device called a tokamak or by using laser beams to compress the fuel. Fusion has the potential to provide a nearly limitless source of clean energy, as it uses abundant fuels like hydrogen isotopes found in seawater and produces no greenhouse gases or long-lived radioactive waste.

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Complete Question:

Gravity holds the sun collectively. but it remains in equilibrium, no longer shrinking into a tiny ball. What opposes the effect of gravity, keeping the sun from collapsing?

a. Convection zone

b. sun Wind

c. stress

d. Coronal Mass Ejections

Answer: The wall and base

Explanation:

Answer:

A=2(wl+hl+hw)

Explanation:

Hope this helps! :)

Explanation:

can gravity form waves?

does every black hole contain a singularity?

have aliens ever visited earth?

can a start turn into a planet?

how bright is laser beam when viewed from the side?

Answer:

1)The connection should be tight.

2)The wire should be connected at the terminals not in between.

3)clean the ends of the wire by sandpaper.

4)Take the voltmeter and ammeter in proper range.

5)The rheostat should be used of low resistant(about 100).

The identification of an element based on the wavelength of its emitted X-ray can be done using the Moseley's Law, which relates the wavelength of the emitted X-ray to the atomic number (Z) of the element.

Moseley's Law is expressed as:

λ = K * (Z - σ)^2

Where:

λ is the wavelength of the emitted X-ray

K and σ are constants specific to the X-ray emission series

In this case, we are given the wavelength (λ) as 0.1940 nm. To identify the element, we need to determine the atomic number (Z).

For the Kα X-ray emission, K and σ are specific constants. For Kα X-rays, K = 1 and σ = 1. The equation then simplifies to:

λ = (Z - 1)^2

Rearranging the equation to solve for Z:

(Z - 1) = √λ

Z = √λ + 1

Substituting the given wavelength of 0.1940 nm into the equation:

Z = √0.1940 + 1

Z ≈ 1.525 + 1

Z ≈ 2.525

The atomic number (Z) is approximately 2.525. Since the atomic number must be a whole number, we can round it to the nearest whole number.

Therefore, the element emitting the Kα X-ray with a wavelength of 0.1940 nm is helium (He), which has an atomic number of 2.

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Answer:

2

cos

(

x

)

−

√

3

=

0

2

cos

(

x

)

-

3

=

0

5

3

y

+

5

2

=

5

5

3

y

+

5

2

=

5

x

−

4

≥

0

Explanation:hopefully this helps you

To get the resonant frequencies of a single cohesive wave, just use formula v = f.The wave velocity is denoted by the letter "v," while the wave's distance is denoted by the symbol "."

The length of the string:

L=75.0 cm=0.75 m

The two resonant frequencies:

450 Hz Λ 308 Hz

a) f1=142 Hzf1​=142 Hz

b)v=213 msv=213 sm​

Gamma rays often have the greatest frequency, while radio waves typically have the lowest.

The fundamental frequency is the lowest frequency that can be produced by a certain instrument.A first harmonic of a instrument is another name for the fundamental frequency.

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Answer:

it is b on edge not d, well atleast for me it was b

Explanation:

Answer:

B) one battery, two switches, and three light bulbs

Explanation:

Get a 12-volt battery to produce a 2000-v emf. A 2Amp current is currently flowing through the battery while it charges.

Provided are the battery's EMF at 12 volts, internal resistance at 0.5 ohms, and terminal voltage at 13 volts.

When the terminal voltage exceeds the battery's EMF, the battery is charging and currents can flow in the opposite direction.

ΔV = E - Ir

The formula is: ΔV - E = -Ir

13 - 12 = -0.5I 1 = -0.5I I = 1 / -0.5 I = -2 A.

The negative symbol denotes a stream flowing in the opposite direction.

As a result, the battery is charging and a 2Amp current is flowing through it. utilizing an induced EMF and a step-up transformer operation volt battery. A magnetic field is produced in the coil's core by current flowing through the 12 volt coil.

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Answer: molecules heat up under different ranges of heat causing bonds to break down but depends on the solid. There are different melting points.

Explanation: