a balloon is rising at a rate of 3 meters per second from a point on the ground 53 meters from an observer. find the rate of change of the angle of elevation from the observer to the balloon when the balloon is 21 meters above the ground.

Answer:

RT=R1+R2+R3

Explanation:

A structural deficit is a budgetary deficit that results from a fundamental mismatch between a government's expenses and its revenues in the long term. A structural deficit is distinguished from the cyclical deficit, which arises from fluctuations in economic growth.

The structural deficit acts as an automatic stabilizer and increases during recessions. The automatic stabilizer refers to any action or mechanism that assists to reduce the swings in an economy without any intervention from policymakers. One instance of an automatic stabilizer is unemployment compensation. This is because, in an economic downturn, unemployment compensation is increased automatically, which, in turn, improves consumer spending. Structural deficits occur when government spending exceeds revenue collections, which is frequently the result of increased spending or decreased income. In certain cases, the structural deficit is the consequence of a tax system that does not generate sufficient revenue to cover government expenditures. A structural deficit remains the same at full employment and is not the same as a cyclical deficit.

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The time of impact of the hailstone on the hood of Darnell’s new car is -0.0002 s. The force that acts on the hailstone is F = ma, where F is the force, m is the mass of hailstone, and a is the acceleration of hailstone.

During an autumn storm, a 0.012-kg hailstone traveling at 20.0 m/s made a 0.20-cm-deep dent in the hood of Darnell’s new car.

We are given: F = 1200 N downwards, and m = 0.012 kg

Since the hailstone is stopped when it hits the hood of the car, we know that its final velocity is zero. To find the time of impact, we can use the formula: v = u + at

Here, u = 20.0 m/sv = 0, and

a = F/m = (1200 N downwards) / (0.012 kg)

= 100000 m/s² downwards

Substituting the values in the above equation, we get :0 = 20.0 m/s + (100000 m/s²)t

=> t = -0.0002 s

The time of impact of the hailstone on the hood of Darnell’s new car is -0.0002 s.

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Answer:

Vector

Explanation:

Vector, in physics, a quantity that has both magnitude and direction. It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantity's magnitude.

Answer:

A) Ana y María e encuentran a las 8 hs 19 minutos 10 segundos (250 segundos después).

María y Ana  se encuentran cuando aún faltan 1500 metros para llega al instituto.

B) Ana tendría que pedalear como mínimo para que María no la alcanzase antes de llegar al instituto a una velocidad de 6.857 \(\frac{m}{s}\).

Explanation:

A) Un movimiento es rectilíneo cuando un objeto describe una trayectoria recta, y es uniforme cuando su velocidad es constante en el tiempo. En otras palabras, el Movimiento Rectilíneo Uniforme es una trayectoria recta, su velocidad es constante y su aceleración es nula.

Para una posición inicial x0 y una velocidad v que tiene el cuerpo a lo largo del movimiento,  la posición para cualquier tiempo está dada por:

x(t)= x0 + v*t

Estableciendo el origen de referencia en el instituto, se tienen los siguientes valores:

Por otro lado, Ana pedalea a 6 m/s y María a 8 m/s.

Entonces, como Ana y María se acercan al origen de referencia, la escuela, se la ecuación del movimiento para cada una de ellas es:

Ambas se encuentra cuando la posición de ellas sea la misma, esto es xana=xmaria. Entonces:

3000 -6*t= 3500 - 8*t

Resolviendo:

-6*t + 8*t= 3500 - 3000

2*t= 500

t= 500÷2

t=250 s= 4 minutos 10 segundos

Ana y María se encuentran a las 8 hs 19 minutos 10 segundos (250 segundos después).

Para conocer la posición en la que se encuentran debes sustituir el tiempo en la ecuación del movimiento de alguna de ellas:

xana=3000 - 6*250

xana= 1500 m

Es decir, María y Ana  se encuentran cuando aún faltan 1500 metros para llega al instituto.

B) Para que esto ocurra Ana y María deben llegar al instituto al mismo tiempo. Entonces, el tiempo que tarda María en llegar a al origen de referencia, la escuela, es:

0= 3500 - 8*t

Resolviendo:

3500=8*t

3500÷8= t

437.5 segundos= t

Así que, si Ana 437.5 segundos o menos, María no la alcanzaría. Siendo la velocidad la relación entre el espacio recorrido por un objeto y el tiempo empleado para ello, entonces la velocidad de Ana se calcula como:

\(velocidad=\frac{distancia}{tiempo}\)

\(velocidad=\frac{3000 metros}{437.5 segundos}\)

velocidad= 6.857 \(\frac{m}{s}\)

Ana tendría que pedalear como mínimo para que María no la alcanzase antes de llegar al instituto a una velocidad de 6.857 \(\frac{m}{s}\).

Answer:6000

Explanation:

Kinetic Energy is the energy an object has owing to its motion. In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2. We use Joules, kilograms, and meters per second as our defaults, although any appropriate units for mass (grams, ounces, etc.) or velocity (miles per hour, millimeters per second, etc.) could certainly be used as well - the calculation is the same regardless.

Answer:

Correct Answer: Option B

Explanation:

Explanation

P1/T1 = P2/T2

80/(273+47) = P1/(273+27) = 75Nm-2

Answer: 75.0 Nm^-2

Explanation:

P1/T1 = P2/T2 80/(273+47) = P1/(273+27) = 75Nm-2

Answer:

Isn't it technically your brain? Because it's always in your skull and when you're younger you have cracks in your skull but as you grow, your skull fossilizes to mend those cracks. IT FOSSILIZES!

Explanation:

1.) Its angular speed is 6.28 rad/s.

2.) The speed of the tip of the hand 9.42 cm every second.

The angular speed of the second hand on a watch is calculated as the ratio of the circumference of the circle the hand follows to the total time taken to complete one rotation, typically measured in radians per second. The radius of the circle the second hand moves on is 1.5 cm. So, the circumference of the circle is 2π ×1.5 cm, which gives us 9.42 cm. Thus, the angular speed of the second hand is 6.28 rad/s.

The speed of the tip of the second hand can be calculated as the product of the radius of the circle it moves on and its angular speed. Thus, the speed of the tip of the second hand is equal to 9.42 cm/6.28s or 1.51 cm/s.

To express the answer in Angular Velocity, we would say the tip of the second hand has a rotational speed of 1.51 cm/s at an angular velocity of 6.28 rad/s. This means that the tip of the second hand spins around six times each second and covers a distance of 9.42 cm every second.

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Answer:

20° slope

idek i just put it into a calculator

An inclined plane rises to a height of 2m over a distance of 6m. The angle of the slope is 20°.

A plane with or without friction is inclined at an angle to the horizontal direction or +x axis.

Given is the height of 2m over a distance of 6m.

Using the trigonometric relation, we get angle θ

tanθ = perpendicular / base

tanθ = 2/6

θ = tan⁻¹ (0.333)

θ =18.42°

Thus, the slope of the inclined plane is 18.42°.

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The work done by the person on the ball while throwing it is 7.35 J. To calculate the work done, we use the formula: Work = Force × Displacement × cos(θ).

In this case, the force applied is the weight of the ball, which is equal to its mass multiplied by the acceleration due to gravity (9.8 m/s^2). The displacement is the change in height, which is 1.5 m - 0.5 m = 1.0 m. The angle (θ) between the force and displacement vectors is 0 degrees because they are in the same direction. Plugging in the values, we get Work = (0.5 kg × 9.8 m/s^2) × 1.0 m × cos(0°) = 4.9 J × 1.0 × 1 = 7.35 J.

The work done by the person on the ball is 7.35 joules. This is determined by multiplying the force exerted on the ball by the distance over which the force is applied, and taking into account the angle between the force and displacement vectors. In this case, the force is equal to the weight of the ball, which is the mass (0.5 kg) multiplied by the acceleration due to gravity (9.8 m/s^2). The distance is the change in height, which is 1.0 meter. Since the force and displacement vectors are in the same direction, the angle between them is 0 degrees. Plugging in the values and performing the calculations, we find that the work done is 7.35 joules.

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The total time is approximately 26.82 seconds.

the total time, we need to know the relationship between power, work, and time. Power is defined as the rate at which work is done, so we can use the formula:

Power = Work / Time

Time = Work / Power

We are given the values of work and power, so we can substitute them into the formula and solve for time:

Time = Work / Power = 346 J / 12.9 W ≈ 26.78 seconds

The total time is the length of time needed to finish a specific task or procedure. In this instance, we were given the energy W in joules and the power P in watts, and we calculated the total time using the formula t = W / P. The formula compares the energy consumed with the power being given, and the outcome is the length of time needed to perform the activity.

It's vital to remember that the calculation's units must match; in this case, the units for energy and power are joules and watts, respectively. Around 26.82 seconds were obtained as the total. Where power and energy consumption are important concepts, such as in physics, engineering, and technology, this computation is helpful.

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Answer:

hhhhhhhhhhhhhhhhhhhhh

Explanation:

sjdnxjwodj1oeixjwkw9dijwqoisjd1

sjssusidej

A) This spring's force constant is 4000 N/m. B) It takes 120 N of power. C) It will take 6J of work to compress this spring to a length of 4.00 cm from its unstretched state. D) 300 N of force is required to stretch it far.

Average force and displacement are the sum of the work done on the spring. It may be expressed as,

W=1/2Kx²

The spring constant is (k) in this case.

The spring constant can be expressed as, where (F) denotes force and (d) indicates spring displacement.

The spring is stretched with 12.0 J of labor, and it moves 3.00 cm as a result. Put the values as follows in the formula above:

k=F/d

K=12/3

As a result, this spring's force constant is 4000 N/m.

4000=F/0.03

        =120

Hence, 120 N of power is required to extend the spring 3.00 cm from its undulating length.

W=1/2(4000)×0.12²

   =6J

Hence, 6 J of work must be done to compress this spring to a length of 4.00 cm from its unstretched state.

4000=F/0.12

     F  =300

Hence, it takes 300 N of power to stretch the spring 4.00 cm from its undisturbed length.

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Answer:

80.08 km/h

Explanation:

Given that Black Panther ran 567.6 km to the east in 23 hours

Velocity = distance covered/time

Substitute the distance covered and time into the formula

Velocity = 567.6/23

Velocity = 24.68 km/h

then turned around and ran 221.8 km to the west in 1.2 hours.

Velocity = 221.8/1.2

Velocity = 184.83 km/h

What was his average velocity during the trip in km/h ?

Average velocity = (V + U)/2

Since the two velocity are opposite to each other, the average velocity will be:

Average velocity = (-24.68 + 184.83)/2

Average velocity = 160.15/2

Average velocity = 80.08 km/h

Therefore, his average velocity during the trip is 80.08 km/h

The magnitude of the cross product of both the given vectors is 6.91.

Given that, the magnitude of first vector is 2m and is pointing east

a = 2 (cos 0° i + sin 0° j) = 2 i

The magnitude of second vector is 4m pointing 30° west of north.

b = 4 (-cos 30° i + sin 30° j) = -4* 0.866 i + 4* 0.5 j = -3.46 i + 2 j

The total angle between a and b is 120°. (as one vector is on the east and the other is 30° west of north.

The formula for the cross product of two vectors is given by,

a × b = |a| |b| sinθ

where, |a| is the determinant of a

|b| is the determinant of b

θ is the angle between a and b

|a| = √(2)² = 2

|b| = √(-3.46)² + (2)² = 3.99

a × b = |a| |b| sinθ = 2* 3.99* sin 120° = 7.98* sin 120° = 6.91

Thus, the magnitude of cross product is 6.91.

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Answer: b

Explanation:

The gravitational pull between two objects depends on their mass and distance. Distance meant by :

B. How close the two objects are located, meaning that closer objects have a stronger gravitational pull.

Gravitational force depends directly on the mass of two objects and inversely on the square of the distance between them. This means that gravity increases when mass increases, but decreases when the distance between objects increases. g = GM/r2, where M is the mass of the Earth, r is the radius of the Earth (or the distance between the centre of the Earth ). and you are standing on its surface), and G is the gravitational constant. G (without subscript) is the gravitational constant and c is the speed of light.

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Answer:

5n

Explanation:

10n divided by 2n is 5n

Answer: search engine optimization

Explanation:

The thinnest film of magnesium fluoride that can limit the reflection of 550-nm light is approximately 9.821 × 10^-7 m or 982.1 nm.

The thinnest film of magnesium fluoride that can limit the reflection of 550-nm light can be calculated using the concept of thin film interference. The formula for the minimum thickness of the film is given by t = (λ / 4) / (n - 1), where t is the thickness of the film, λ is the wavelength of light, and n is the refractive index of the film material.

In this case, the film is designed to limit the reflection of 550-nm light. Therefore, λ = 550 nm = 5.5 × 10^-7 m. The refractive index of magnesium fluoride is given as 1.38, and the refractive index of glass is 1.52.

Using the formula, the minimum thickness of the magnesium fluoride film can be calculated as follows:

t = (5.5 × 10^-7 m / 4) / (1.38 - 1.52)

  = (1.375 × 10^-7 m) / (-0.14)

  ≈ -9.821 × 10^-7 m

Therefore, the thinnest film of magnesium fluoride that can limit the reflection of 550-nm light is approximately 9.821 × 10^-7 m or 982.1 nm.

The explanation behind this is based on the principles of interference of light waves. When light passes through a thin film, some of the light reflects from the upper surface of the film and some from the lower surface.

These reflected waves can interfere constructively or destructively, depending on the thickness of the film and the wavelength of the light. In the case of destructive interference, the reflected waves cancel each other out, resulting in minimal reflection.

To achieve this, the thickness of the film needs to be such that the reflected waves from both surfaces are exactly out of phase and interfere destructively.

The formula mentioned earlier, t = (λ / 4) / (n - 1), calculates the minimum thickness required for destructive interference. By using the given values of λ (550 nm) and the refractive index of magnesium fluoride (1.38), we can calculate the minimum thickness to be approximately 982.1 nm.

Coating lenses with this thin film of magnesium fluoride helps reduce reflections and improve image clarity in sophisticated cameras, ensuring that the maximum amount of light is transmitted through the lens rather than being reflected away.

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Answer:

i don't know.. but it get to me every day..

Explanation:

The magnetic field of a wave propagating through a certain nonmagnetic material can be described by the Maxwell's equations, which govern the behavior of electromagnetic waves.

In particular, the magnetic field is related to the electric field and the rate of change of the electric field by the equation known as Faraday's law. This law states that a changing magnetic field induces an electric field, and vice versa.

However, since the material in question is nonmagnetic, there are no free magnetic charges that can interact with the electromagnetic wave. Therefore, the magnetic field is solely due to the changing electric field, which in turn is caused by the oscillation of charged particles in the material. The exact form of the magnetic field depends on the geometry of the wave and the properties of the material, such as its permittivity and conductivity.

In summary, the magnetic field of a wave propagating through a nonmagnetic material is determined by Faraday's law and the interaction of the electric field with charged particles in the material.

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Answer:

its D

Explanation:

i just got it correct on a. p. e. x. :)

Answer:

Efficiency of a machine is defined as the ratio of output work to input work in a machine . It is expressed in percentage and denoted by

η ( eta).

Explanation:

Because acceleration is velocity in m/s divided by time in s, the SI units for acceleration are m/s2, meters per second squared or meters per second per second, which literally means by how many meters per second the velocity changes every second. ... The quicker you turn, the greater the acceleration.

Answer: