WILL GIVE BRAINLIEST!!!


There are many natural processes that shape the Earth's surface. These processes can act as constructive forces, destructive forces, or both.


In general, natural processes act as constructive forces


A) only at high elevations.


B) only at sea level.


C) when they wear down landforms.


D) when they build up landforms

The average speed of Eddie during this lap will be 106 m/s. Thus, the correct option is B.

The average speed is the total distance traveled by an object in a particular time interval. The average speed is a scalar quantity. It is because average speed has only the magnitude and does not have direction.

Average speed = Total Distance traveled/Total Time taken

Total Distance = 4023 m,

Total Time = 38.1 seconds

Average speed = 4023/ 38.1

Average speed = 105.59 m/s ≈ 106 m/s

Therefore, the correct option is B.

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Your question is incomplete, most probably the complete question is:

In 1996 Eddie Cheever recorded the fastest lap ever at the Indianapolis 500. His car completed one lap (4023 meters) in a record time of 38.1 seconds. What was Eddie’s average velocity during this lap?

A) 0 m/s

B) 106 m/s

C) 9.00 x 10-3 m/s

D) 1.53 x 105 m/s

The acceleration of the eraser is 169.19 m/s².

A body travelling in a circle has centripetal acceleration. Due to the fact that velocity is a vector quantity (i.e., it has both a magnitude and a direction), when a body travels in a circle, its direction is continually changing, which causes a change in velocity, which results in an acceleration.

Given that angular velocity of the eraser: ω = 127 rpm

= 126×2π/60 radian/second

= 13.2 radian/second.

radius of the circle: r = 0.974 meter.

Hence, its centripetal acceleration is = ω²r

= 13.2×13.2×0.974 m/s²

=169.19 m/s².

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a ) When they reach the ground, rock B has greater velocity.

b ) Both rocks have the same acceleration

c ) Rock A and Rock B arrives at the same time

According to law of conservation of energy,

1 / 2 m u² + m g hi = 1 / 2 m v² + m g hf

u = 0

hf = 0

m g hi = 1 / 2 m v²

v = √ ( 2 g / m ) √ hi

v ∝ √ hi

a ) hi of rock A will be higher because it reaches a certain height above the ground which will be considered as initial height for rock A. So, the final velocity of rock A is higher.

b ) Both the rock are affected by only the force of gravity. So they will have the same acceleration of 9.8 m / s²

c ) If air resistance is ignored,

s = u t + 1 / 2 at²

For an object that is dropped,

u = 0

a = g

s = at² / 2

t = √ ( 2 s / g )

It can clearly be seen that no matter what height an object might be dropped from, if air resistance is ignore they will fall at the same time.

Therefore,

a ) When they reach the ground, rock B has greater velocity.

b ) Both rocks have the same acceleration

c ) Rock A and Rock B arrives at the same time

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Answer:

1.05m

Explanation:

To get this answer, you must first know how long it takes the ball to reach the ground. In order to figure that out, the process is simple:

First: Multiply the object's height by 2.

2.4x2=4.8

Next: Divide that answer by the speed of Gravity, 9.8 or 9.81m/s^2

(I prefer to use the method used by engineers, attend to precision, so I keep the same number of decimals in each number I am calculating.)

4.8/9.8=0.48979591836734693877551020408163m/s^2

Next: Square Root this answer.

=0.69985421222376517091350973563025

Last: Multiply your square rooted answer by your  forward velocity.

0.69985421222376517091350973563025x1.5=

1.0497813183356477563702646034454 or, since Khan Academy only wants three significant digits, round up to 1.05.

Answer:

1.05

Explanation:

what the other guy said trust

One end of the taut cable is pulled, causing a transverse pulse to be created. In 0.835 seconds, the pulse travels four times down the cable and four times back then the tension in the ethernet cable is determined as 67 N.

It is given to us that -

Ethernet cable is 3.90 m long => l = 3.90 m

and has a mass of 0.190 kg => m = 0.190 kg

It is also given that the transverse pulse makes four trips down and back along the cable in 0.835 s.

=> time taken, t = 0.835 s

We have to find out the tension in the cable.

We know that

Speed = Distance/Time ----- (1)

Since the transverse pulse applied on the ethernet cable makes four trips down and back along the cable, the total distance travelled by the pulse = 4 * (2l)

Now, using equation (1) we can find out the speed of the pulse by -

\(v = \frac{4*2*3.90}{0.835} \\= > v = 37.36\) m/s ---- (2)

We also know that the mass density of the pulse can be determined by the formula -

μ = \(\frac{m}{l}\) ------ (3)

where,

m = mass of the cable

l = length of the cable

Substituting the given values of mass and length of the cable in equation (3), we can find out the mass density of the pulse as -

μ = \(\frac{m}{l} = \frac{0.190}{3.90} = 0.048\) kg/m ------ (4)

We also know that the tension in the cable can be represented by the formula -

T = μ\(v^{2}\)  ----- (5)

Substituting the values of v and μ from equations (2) and (4) respectively, we can find out the tension in the cable as -

T = μ\(v^{2}\)

=> T = 0.048 * \((37.36)^{2}\)

=> T = 67 N

Thus, the tension in the ethernet cable is determined as 67 N.

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The correct answer is velocity.

The vector measure of level and direction of motion is known as velocity. The speed at which an object goes in one direction is known as its velocity. Speed may be used to calculate both the speed of the car traveling north on the major highway and the speed of the rocket bursting in space. As you may expect, the vector velocity's scalar size (total value) corresponds to the movement's speed. Speed is the initial exit of a place in terms of time when it comes to computations. A straightforward formula that incorporates measurement, distance, and time can be used to determine speed.

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Answer: The Coriolis effect results in bending the direction of surface currents to the right in the Northern Hemisphere and left in the Southern Hemisphere. The Coriolis effect causes winds and currents to form the circular patterns. The direction in which they spin depends upon the hemisphere in which they are present.Coriolis Effect is named after the French mathematician and physicist Gaspard-Gustave de Coriolis. It affects the weather patterns of an area, it affects the ocean currents, and it also affects air quality.

Answer:

We can use conservation of momentum and conservation of energy to solve this problem.

Conservation of momentum:

Initial momentum = final momentum

m1v1 + m2v2 = (m1 + m2)v'

where m1 = 20 g = 0.02 kg, v1 = 10 m/s, m2 = 40 g = 0.04 kg, v2 = 0, v' is the final velocity of both balls after collision.

Solving for v':

v' = (m1v1 + m2v2)/(m1 + m2)

v' = (0.02 x 10 + 0.04 x 0)/(0.02 + 0.04)

v' = 6.67 m/s

Conservation of energy:

Initial kinetic energy = final kinetic energy

(1/2)m1v1^2 + (1/2)m2v2^2 = (1/2)(m1 + m2)v'^2

where v' is the final velocity calculated from conservation of momentum.

Solving for the total change in kinetic energy:

ΔKE = (1/2)(m1v1^2 + m2v2^2) - (1/2)(m1 + m2)v'^2

ΔKE = (1/2)(0.02 x 10^2 + 0.04 x 0^2) - (1/2)(0.02 + 0.04) x 6.67^2

ΔKE = -0.518 J

Therefore, the answer is (E) -518 x 10^-1.

Answer: The pressure that the brick exerts on the surface is approximately 781.8 Pa

Explanation:

Pressure is defined as the force exerted per unit area. In this case, the force exerted by the brick is its weight, which is the mass multiplied by acceleration due to gravity.

The formula to calculate pressure is:

P = F/A

where:

- P is the pressure

- F is the force

- A is the area

First, we need to calculate the weight of the brick. The weight (F) can be calculated using the equation F = m*g, where m is the mass of the brick and g is the acceleration due to gravity. On Earth, the acceleration due to gravity is approximately 9.8 m/s².

F = m*g

F = 1.8 kg * 9.8 m/s²

F = 17.64 N (rounded to two decimal places)

Next, we need to calculate the area of the cross section of the brick. The area (A) is calculated by multiplying the length by the width.

A = length * width

A = 21.5 cm * 10.5 cm

Before we can do this calculation, we need to convert the measurements from centimeters to meters, because the standard unit of measurement for area in physics is square meters (m²). 1 cm = 0.01 m, so:

A = 0.215 m * 0.105 m

A = 0.022575 m²

Finally, we can calculate the pressure using the formula P = F/A:

P = 17.64 N / 0.022575 m²

P = 781.8 Pa (rounded to one decimal place)

So, the pressure that the brick exerts on the surface is approximately 781.8 Pa (Pascals).

The plasma oscillations occur at a frequency of approximately = 9 × 109 Hz.

Plasma oscillations, also known as plasma frequency, can be determined using the formula:

f = (1 / (2π)) * √(ne^2 / (ε₀m))

where f is the frequency, n is the number density of electrons, e is the elementary charge, ε₀ is the vacuum permittivity, and m is the mass of an electron.

Given the number density of the plasma as 1018 m^(-3), we can substitute this value into the formula:

f = (1 / (2π)) * √((1018) * (1.6 x 10^(-19))^2 / (8.85 x 10^(-12) * 9.11 x 10^(-31)))

Simplifying the expression:

f ≈ 9 x 10^9 Hz

Therefore, the plasma oscillations occur at a frequency of approximately 9 x 10^9 Hz, which corresponds to option C) 9 × 109 Hz.

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Answer:

Your answer is C

Explanation:

V=IxR

220 divide by 1.2=183.0

The answer was probably a type error so it should be C

Answer:

I hope this helps. Plzz mark as brainliest

Explanation:

A man walking at the rate of 5 km/hr. crosses a bridge in 15 minutes. The length of the bridge (in meters) is:

[A]1000 m

[B]1250 m

[C]600 m

[D]750 m

1250 m

Speed of the man = 5 km/hr



Time taken to cross the bridge = 15 minutes

Length of the bridge = Speed  Time



Hence option [B] is the right answer.

Answer:

Angle of Refraction ?

Explanation:

My decided answer on this question

Answer:

d

Explanation:

Answer:

Earth absorbs heat from the sun.

Explanation:

This radiation is absorbed by greenhouse gases which then radiate energy into all directions including downwards and thereby trapping heat in the atmosphere.

Hope you have a good day :)

Expressing the answer in three significant figures separated by a comma, we get: F⃗ _3 = (-7.99, -6.00) N = (-10.00 N, -38.88°) using newton second law.

To find the third force, we can use Newton's second law, which states that the net force on an object is equal to its mass times its acceleration:

F⃗ _net = m⃗ a⃗

where F⃗ _net is the vector sum of all the forces acting on the object.

We can start by finding the vector sum of F⃗ _1 and F⃗ _2:

F⃗ _1 + F⃗ _2 = (3.06 N)x^ + (-1.62 N)x^ + (1.73 N)y^

= (1.44 N)x^ + (1.73 N)y^

Now, we can find the net force by subtracting the vector sum of F⃗ _1 and F⃗ _2 from the mass times acceleration:

F⃗ _3 = m⃗ a⃗ - (F⃗ _1 + F⃗ _2 )

= (6.10 kg)(1.31 m/s^2 x^ - 0.673 m/s^2 y^) - (1.44 N)x^ - (1.73 N)y^

= (7.99 N)x^ - (6.00 N)y^

Therefore, the third force F⃗ _3 has a magnitude of 10.00 N and is directed at an angle of 38.88 degrees below the positive x-axis:

|F⃗ _3| = √[(7.99 N)^2 + (-6.00 N)^2] = 10.00 N

θ = tan⁻¹(-6.00 N / 7.99 N) = -38.88° (measured below the positive x-axis)

Expressing the answer in three significant figures separated by a comma, we get:

F⃗ _3 = (-7.99, -6.00) N = (-10.00 N, -38.88°)

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The statement "Light and material objects always interact in some way when light is incident" is true because this interaction can include reflection, refraction, absorption, scattering, and transmission of light.

Light and material objects always interact in one way or another. When light is incident on a material object, it can be transmitted through the object, reflected off the object, or absorbed by the object. The interaction of light with a material object depends on the properties of the light and the properties of the material object.

For example, visible light is transmitted through glass, but it is reflected off of a mirror. Visible light is absorbed by a black object, which is why black objects appear black.

The interaction of light with a material object can be used to create a variety of effects, such as images, colors, and shadows.

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In the Laplace transform we can obtain the solution of the differential equation mx" + cx' + kx = 0 for different values of m, c, and k, and classify the system as overdamped, underdamped, or critically damped.

To solve the differential equation mx" + cx' + kx = 0 using the Laplace transform, we first take the Laplace transform of both sides, using the fact that L{d^n/dt^n [f(t)]} = s^n F(s) - s^(n-1) f(0) - s^(n-2) f'(0) - ... - f^(n-1)(0):

L{mx" + cx' + kx} = L{0}

m L{x"} + c L{x'} + k L{x} = 0

Applying the Laplace transform to the initial conditions x(0) = a and x'(0) = b, we get:

L{x(0)} = a/s

L{x'(0)} = b

Now we substitute the Laplace transforms of x(t), x'(t), and x"(t) into the differential equation:

m [s^2 X(s) - s x(0) - x'(0)] + c [s X(s) - x(0)] + k X(s) = 0

Simplifying and solving for X(s), we get:

X(s) = [as + mb]/[ms^2 + cs + k]

where a and b are the initial conditions given.

The roots of the denominator are given by:

s1,2 = [-c ± sqrt(c^2 - 4mk)]/(2m)

a) For c^2 - 4mk > 0, the roots s1 and s2 are real and distinct, which corresponds to an overdamped system. In this case, the solution is given by:

x(t) = A e^(s1 t) + B e^(s2 t)

where A and B are constants determined by the initial conditions.

b) For c^2 - 4mk < 0, the roots s1 and s2 are complex conjugates with negative real part, which corresponds to an underdamped system. In this case, the solution is given by:

x(t) = e^(-c/2m t) [A cos(wt) + B sin(wt)]

where w = sqrt(4mk - c^2)/(2m) is the angular frequency of the damped oscillations, and A and B are constants determined by the initial conditions.

c) For c^2 - 4mk = 0, the roots s1 and s2 are real and equal, which corresponds to a critically damped system. In this case, the solution is given by:

x(t) = (A + B t) e^(-c/2m t)

where A and B are constants determined by the initial conditions.

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Answer:

Centripetal acceleration does not change speed but it changes direction as it is a single thing moving in a circular path. Most accelerations, like linear acceleration, cause things to move in a straight line. But, both centripetal and angular acceleration are vectors.

The overall voltage gain is dependent on the voltage gains and input/output impedances of both amplifiers.

The overall voltage gain Vout/Vin in terms of AV1, AV2, Zin2, and Zout1 is given by;Vout/Vin = (AV1 + Zout1 / Rin1) × (AV2 × Zin2 / Zout1 + Zin2 + Rin2) where Rin1 is the input resistance of the first amplifier, Rin2 is the input resistance of the second amplifier, Zin2 is the input impedance of the load and Zout1 is the output impedance of the source.

AV1 and AV2 are the voltage gains of the first and second amplifiers, respectively. If Rin2 is much larger than Zin2, it can be approximated as infinity, and the gain equation can be simplified as Vout/Vin = AV1 × AV2 × (Zin2 + Rin2) / Rin1Zin2 can also be ignored if Rin2 is much larger than Zin2

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Cartographers solve the problem of showing the spherical Earth on a flat piece of paper by using a map projection.

A map projection is a systematic transformation of the Earth's curved surface onto a flat surface, such as a map. There are many different types of map projections, each with its own advantages and disadvantages, depending on the purpose of the map and the area being represented.

Some common types of map projections include cylindrical, conic, and azimuthal projections. Map projections distort certain properties of the Earth's surface, such as shape, distance, direction, and area, so cartographers must carefully select a map projection that best represents the features they need to show.

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The complete question is:

Fill in the blanks:

Cartographers solve the problem of showing the spherical earth on a flat piece of paper by using ________

The probability that a loaf of bread chosen at random will have a mass of more than 450g is 0.0026 or 0.26%.

The probability that a loaf of bread chosen at random will have a mass of more than 450g is found by first standardizing the random variable, using the standard normal distribution. We can then use the standard normal table or calculator to find the area to the right of the standardized value. The standardized random variable can be found using the formula

Z = (X - μ) / σ,

where X is the given value, μ is the mean, and σ is the standard deviation.

Substituting the given values, we get:

Z = (450 - 400) / 18 = 2.78

Using the standard normal table or calculator, we can find the area to the right of 2.78. This area represents the probability that a loaf of bread chosen at random will have a mass of more than 450g.

Using a standard normal table or calculator, we find that this area is 0.0026 or 0.26%.

Hence, the probability that a loaf of bread chosen at random will have a mass of more than 450g is 0.0026 or 0.26%.

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Explanation:

Los derechos de las mujeres fueron conquistados a través de importantes luchas llevadas a cabo por mujeres, como el movimiento feminista que tuvo lugar a fines del siglo XIX, cuyo principal reclamo fue el derecho al voto de las mujeres.

Con el tiempo, las mujeres ganaron más derechos y una mayor participación en el mercado laboral y en puestos importantes de la sociedad. Pero aún queda mucho por cambiar, ya que las estadísticas aún muestran que hay pocas mujeres en posiciones de poder en relación a los hombres, y el salario de una mujer que ocupa el mismo puesto que un hombre es siempre menor.

Dado que la sociedad se concibió a través de parámetros sexistas, lo que continúa en la actualidad, es claro que en la pandemia específicamente que generó crisis económicas en todo el mundo, se vio a una gran cantidad de mujeres perder sus empleos, además del expresivo número de casos de violencia doméstica que se agravaron en el período de aislamiento social.

Así que estos hechos solo demuestran que la lucha por la igualdad de género y los derechos de las mujeres aún están en sus inicios, a pesar de muchos logros que las mujeres aún deben luchar por lo básico, que es el apoyo social y político además de una legislación más estricta que castiga con más rigor a las agresoras. Las mujeres deben estar protegidas por la ley y las instituciones y los medios de comunicación deben abordar más el tema y promover el feminismo como una lucha por la igualdad.

The starling needs to consume 0.33 mg of carbohydrates to fuel its 1.4 km flight at 11 m/s.

The amount of carbohydrates a starling needs to consume to fuel its 1.4 km flight at 11 m/s can be calculated using the concept of metabolic rates and energy requirements.Metabolic rate is the amount of energy required by an organism to maintain vital functions and carry out physical activities. Energy requirement is dependent on the organism's size, weight, and activity level.Studies have shown that small birds like the starling have high metabolic rates, which means they require a lot of energy to carry out their activities. In flight, birds primarily use carbohydrates as their energy source. Carbohydrates are stored in the muscles and liver as glycogen and are broken down into glucose during flight to provide energy. The amount of glycogen required is proportional to the amount of energy needed to fuel the flight.Using the equation for kinetic energy, KE =\frac{ 1}{2}mv^{2}, where KE is kinetic energy, m is mass, and v is velocity, we can calculate the energy required to fuel the bird's flight. The mass of a starling is approximately 85 grams. Substituting the values,KE =\frac{ 1}{2} * 0.085 kg * (11 m/s)^{2}; KE = 5.69 J. The energy required to fuel the flight is 5.69 joules. Since 1 gram of carbohydrates provides 17 kJ of energy, the amount of carbohydrates required can be calculated as follows:Carbohydrates required =\frac{ Energy required }{ Energy per gram of carbohydrates}  

Carbohydrates required = \frac{5.69 J }{17,000 J/g }

Carbohydrates required = 0.00033 g or 0.33 mg

Therefore, the starling needs to consume 0.33 mg of carbohydrates to fuel its 1.4 km flight at 11 m/s.

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Dryness fraction of steam at State 1; Initial Volume V1 = 0.006 m3 and pressure P1 = 2.0 bar = 2.0 × 105 Pa. Also, mass of the steam m = 0.01 kg.

We need to find the dryness fraction, which is x at State 1.

Volume of steam = (1 − x)V1 at State 1

Volume of liquid = xV1 at State 1

Total volume at State 1 = V1 m3At State 1,

pV = mRTFrom the steam table at State 1,

T = 120.0 °C,

which gives R = 0.287 kJ/kg KSo,

pV = 287 T/1000

∴ m = pV/RT = 0.01 kg From the steam table at 2.0 bar and 120.0 °C, the specific volume of dry saturated steam is 0.106 m3/kg Hence,

volume of dry saturated steam = m × specific

volume of dry saturated steam = 0.01 kg × 0.106 m3/kg = 0.00106 m3.

Therefore,

volume of wet steam = Total volume − Volume of dry saturated steam = 0.006 m3 − 0.00106 m3 = 0.00494 m3 Now, we can find the dryness fraction as x = Volume of dry saturated steam / Total volume = 0.00106 m3 / 0.006 m3 = 0.177 or 17.7%.Therefore, the dryness fraction of steam at State 1 is 17.7%.Volume of steam at State 2; We are given that the steam is heated until it becomes dry saturated vapour at State 2. The pressure at State 2 is the same as that at State 1, which is 2.0 bar. Also, the volume of the steam at State 2 is V2.

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The angle of the plate will affect how much sunlight hits the plate. The amount of sunlight that hits a surface depends on the angle of incidence, which is the angle at which the sunlight hits the surface. When the angle of incidence is perpendicular to the surface (i.e., the sun is directly overhead), the maximum amount of sunlight is received by the surface.

However, as the angle of incidence increases, the amount of sunlight that hits the surface decreases because the same amount of sunlight is spread over a larger area. Therefore, if the plate is not angled properly to face the sun, it will receive less sunlight, which will affect its efficiency in converting sunlight into electricity.

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Answer:

Explanation:

Kinetic energy involves motion so something that is not moving has zero kinetic energy.

Potential energy does not involve motion and is based on position in a field like gravity and magnetic.

Answer:Fricition

Explanation: It is fricition in the net force

A car is speeding up with a force of 120 mph and heading east. The force of friction acts against the car with a force of 80 N westward, and the net force acting on the car is 40 N eastward, which means the car is accelerating eastward with a force of 40 N.

To calculate the net force acting on the car, one needs to consider the direction and magnitude of the forces acting on it. A force of 120 N to the east is acting to accelerate the car in that direction, and a force of 80 N to the west is acting to oppose the motion of the car.

Net force = force of acceleration -force of friction.

Net force = 120 N east- 80 N west.

Net force = 40 N East

Hence, the net force acting on the car is 40 N eastward, which means the car is accelerating eastward with a force of 40 N.

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