Frieda stands on a hill with a slope of 62°. If her mass is 49 kg, what is the
magnitude of the normal force acting on her?
A. 480 N
B. 512 N
C. 424 N
D. 226 N

The voltage across the conductor is 500V.

Ohm's law states that the current through a conductor is directly proportional to the voltage across the conductor.

Here,

Current in the conductor, I = 50A

Resistance of the conductor, R = 10 Ω

According to Ohm's law,

V α I

V = IR

V = 50 x 10

V = 500 V

Hence,

The voltage across the conductor is 500V.

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The signal-to-noise ratio (SNR) is 28.6 dB. The correct answer is option c.

The formula for signal-to-noise ratio (SNR) in decibels (dB) is:

SNR(dB) = 10log₁₀(S/N)

where S is the received signal power and N is the noise power.

To determine the SNR in dBs, we need to calculate the noise power first. The noise power can be calculated using the formula:

N = k*T*B

where k is the Boltzmann constant (1.38 x 10⁻²³ J/K), T is the temperature in Kelvin, and B is the bandwidth.

Substituting the given values, we get:

N = (1.38 × 10⁻²³ J/K) × 288 K × 36 ×10⁶ Hz
N = 1.43 × 10⁻¹³ W

Now we can calculate the SNR in dBs using the first formula:

SNR(dB) = 10log₁₀(S/N)
SNR(dB) = 10log₁₀(22 ×10⁻¹⁰/1.43 × 10⁻¹³)
SNR(dB) = 41.87 dB

Therefore, the nearest answer is (c) [SNR] = 28.6 dB.

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Answer:

A lightbulb has 25 W stamped on it. What does this mean?:

These labels mean that each lightbulb has Its respective power delivered to It when It Is connected to a constant

Explanation:

Answer:

The car must be moving at a changing velocity but at a constant speed. This is caused when an object is changing direction but not its speed.

Explanation:

Since velocity is a vector, it is measured with both magnitude (the numerical value) and direction. Acceleration is the change in velocity over a time period, which makes acceleration also a vector.

Speed is a scalar, so it is only measured by its magnitude (the numerical value). Speed only changes if you:

1. slow down
2. speed up

There are 3 ways an object can accelerate:
1. by slowing down
2. by speeding up
3. by changing direction (turning)

Since the speed is the same, that means the car can't be speeding up or slowing down. Therefore, the car must be turning direction with a constant speed.

When a light wave travels from air into glass, the correct answer is:

B) Its speed decreases.

When light passes from one medium to another, such as from air to glass, it encounters a change in the refractive index of the material. The refractive index is a property of a medium that describes how much the speed of light changes when passing through that medium.

In general, the speed of light is slower in a denser medium like glass compared to air. As the light wave enters the glass, it slows down due to interactions with the atoms or molecules in the material. This change in speed is accompanied by a change in direction, which is known as refraction.

However, the wavelength of the light wave does not change significantly when it travels from air into glass, so option C is not correct. Similarly, the frequency of the light wave remains the same, as it is a property of the light wave itself and is not affected by the medium it travels through, making option E also incorrect.

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Answer:

I'm not sure but I think it is electric currents in the outer core

When the car is passing the northernmost part of the circular track, the car's acceleration must be directed towards the center of the circle.

In circular motion, there is always an acceleration directed towards the center of the circle. This is called centripetal acceleration. It is in charge of sustaining the object's curved motion.

The centripetal acceleration (a_c) can be calculated using the following formula:

a_c = (v^2) / r

Since the car is moving at a constant speed on the circular track, the magnitude of its velocity (v) remains constant. However, the direction of the velocity is changing continuously as the car moves along the circular path.

When the car is passing the northernmost part of the circle, its velocity is directed towards the east (in the counterclockwise direction). The circle's center is always the target of the centripetal acceleration. Therefore, at the northernmost part of the circle, the acceleration of the car must be directed towards the center of the circle.

When the car is passing the northernmost part of the circular track, its acceleration must be directed towards the center of the circle. This acceleration, known as centripetal acceleration, is responsible for keeping the car moving in its curved path.

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The next nearest galaxy would be if, a galaxy was shrunk down to the size of a paper plate less than 100 feet away, so option C is correct.

A galaxy is a vast collection of stars, solar systems, gas, and dust. Gravity holds a galaxy together. A supermassive black hole also resides in the center of our galaxy, the Milky Way. You see additional stars in the Milky Way as you look up at the stars in the night sky.

As we know that the size of our galaxy is 52,850 light years approx,

If we shrunk it to the size of a paper plate, which is 0.2286 meters,

The nearest galaxy is Andromeda Galaxy which is 2.5 million light-years away,

The distance of the nearest galaxy, d = 2.5 × 10⁶ light year

The distance of the nearest galaxy, d = 2.5 × 10⁶ × 9.4 × 10¹⁵ meters (1light year = 9.4 × 10¹⁵ meter),

Thus, as compared to miles, the foot is the smaller unit to represent,

Therefore, the next nearest galaxy would be less than 100 feet away.

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Answer:

d

Explanation:

because

Answer:

the answer is B. Meteorites struck the region that Mexico now occupies.

Explanation:

i got it right on plato

Answer:

the answer is b

Explanation:

Answer:

The answer is B or "Electrons are added to two negatively charged objects".

Explanation:

Answer: TRUE

Explanation: I did it before

80Sec or 1.33 min time taken by train to cross a bridge with a uniform speed of 36 kmph.

Given data,

length of bridge = 600m

length of train = 200m

Length of bridge + Length of train is the total distance travelled by train to cross the bridge.

So, 600+200 = 800m = 0.8km

Now, applying the formula for time,

\(time =\frac{distance}{speed}\)

\(time = \frac{0.8}{36}\)

time = 0.022hours

time in seconds= 0.022×60×60

time in seconds= 1.33×60

time in seconds= 80seconds

Therefore, 80Sec or 1.33 min time taken by train to cross a bridge with a uniform speed of 36 kmph.

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Answer:

Generator.

Explanation:

In a generator, an e.m.f. is induced across a wire when it moves through the magnetic field between the poles of a magnet.

The mode of operation of a generator is that a metal core with copper tightly wound to it (conductor coil) rotates rapidly between the two (2) poles of a horseshoe magnet type. Thus when the conductor coil rotates rapidly, it cuts the magnetic field existing between the poles of the horseshoe magnet and then induces the flow of current.

Answer:

3.6

Explanation:

plz mark brainliest | (• ◡•)|

Answer:

P = 4707.692 watts

Explanation:

To find work:

Work = Force * Displacement

W= 255 N * 48 m

W = 12240 J

now we can find power:

Power = Work / Time

P = 12240 J / 2.6 s

P = 4707.692 watts

An experience that forces an individual to confront an existential issue is known as a boundary situation in this type of context.

This type of situation is characterized by negative consequences which the individual tries to escape from in an unfruitful attempt. It usually makes the individual feel like it can't be overcome and is also likely to enter deep into the crisis.

This experience forces an individual to confront an existential issue so as to prevent it from escalating into a very difficult position and to promptly address the situation through employing different types of techniques. This ensures that a reoccurence doesn't come up in this type of situation.

This is therefore the reason why boundary situation was chosen as the most appropriate choice.

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The present value of the following single amounts are as follows;

PV for FV = $20,000, I =7%, N =10 years is $10,155.84

PV for FV = $14,000, I =8%, N =12 years is $4,489.92

PV for FV = $25,000, I =12%, N =20 years is $2,590.11

PV for FV = $40,000, I =10%, N =8 years is $18,520.89.

Future value (FV) =$20,000,

Interest rate (I) =7%,Time (n) = 10 years

The present value (PV) can be calculated as follows;

PV = FV / (1 + i)n = 20000 / (1 + 0.07)10PV = 20000 / 1.96715PV = $10,155.84

Future value (FV) =$14,000,

Interest rate (I) =8%,

Time (n) = 12 years

The present value (PV) can be calculated as follows;

PV = FV / (1 + i)n = 14000 / (1 + 0.08)12PV = 14000 / 3.12159PV = $4,489.92

Future value (FV) =$25,000,

Interest rate (I) =12%,Time (n) = 20 years

The present value (PV) can be calculated as follows;

PV = FV / (1 + i)n = 25000 / (1 + 0.12)20PV = 25000 / 9.64632PV = $2,590.11

Future value (FV) =$40,000,Interest rate (I) =10%,Time (n) = 8 years

The present value (PV) can be calculated as follows;

PV = FV / (1 + i)n = 40000 / (1 + 0.1)8PV = 40000 / 2.15893PV = $18,520.89

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A cantilever beam's free end exhibits the most slope and deflection, whereas the clamped end exhibits neither slope nor deflection.

The midspan of a simply supported beam under symmetric loading conditions is where the maximum deflection occurs. The beam supports are where you can see the steepest slope. Where the slope is zero, the maximum deflection happens.

From the perspective of structural analysis:-

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i dont know  Im sorry but why Im messaging is because when more people respond it usually is the first to pop up so someone else will see this and be able to help you            Explanation:

Answer:

8 V

Explanation:

Equivalent R

Finding Current

Finding V

To maintain the same time constant in a resistor-capacitor circuit when the resistance is reduced to one-third of its initial value, the capacitance should be increased threefold.

The resistance of a resistor-capacitor combination is reduced to one-third of its initial value. In a resistor-capacitor circuit, a time constant is the time it takes for the voltage across the capacitor to reach 63.2% of its initial value. A time constant is a function of both resistance and capacitance, and it can be determined using the following formula: τ = RC, where τ is the time constant, R is the resistance in ohms, and C is the capacitance in farads.

A decrease in resistance leads to a decrease in the time constant. To maintain the time constant, the capacitance should be increased proportionally to the decrease in resistance. When resistance is reduced to one-third of its original value, capacitance should be tripled to maintain the time constant's original value. The formula for capacitance is: C = τ/R = τ/ (\(R_initial\)/3) = 3τ/\(R_initial\)

Therefore, to maintain the same time constant in a resistor-capacitor circuit when the resistance is reduced to one-third of its initial value, the capacitance should be increased threefold.

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The direction of rotation of a motor be changed  by reversing two of its stator leads.

Electric motor is the electro-mechanical machine which converts the electrical energy into mechanical energy. In other words, the devices which produce rotational force is known as the motor.

In order to reverse the direction of an AC motor, we need to change the magnetic field the to make the  movement in the opposite direction. As we change the direction of magnetic field , force will also get reversed by using Fleming's left hand rule .

Since each wire consists of a positive and negative current within the magnetic fields, the flip-flopping of main and starter wires causes the motor to run in reverse rotation

Hence,  the direction of rotation of a 3-phase motor can be changed by reversing two of its stator leads.

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The dot product is 25, the angle is \(\theta = cos^{-1} \frac{25}{\sqrt{35} \times \sqrt{21}}\), the cross product is 1i + (-6)j + (-7)k, and the area of the parallelogram spanned by vectors A and B is \(\sqrt{86}\).

Given,

A = 5i + 3j + k

B = 4i + j + 2k

i. Dot Product (A · B):

The dot product of two vectors A and B is given by the sum of the products of their corresponding components.

\(A.B = (A_x \times B_x) + (A_y \times B_y) + (A_z \times B_z)\\A.B = (5 \times 4) + (3 \times 1) + (1 \times 2) \\= 20 + 3 + 2 \\= 25\)

ii. Angle between vectors A and B:

The angle between two vectors A and B can be calculated using the dot product and the magnitudes of the vectors.

\(cos\theta = (A.B) / (|A| \times |B|)\\\theta = \frac{1}{cos} ((A.B) / (|A| \times |B|))\\A = \sqrt{(5^2 + 3^2 + 1^2)} =\\ \sqrt{35}\\B = \sqrt{(4^2 + 1^2 + 2^2)} \\= \sqrt{21}cos\theta = \frac{(A.B) / (|A| \times |B|)\\\theta = \frac{1}{cos} \frac{25}{\sqrt{35} \times \sqrt{21}}}\)

iv. Cross Product (A × B):

The cross product of two vectors A and B is a vector that is perpendicular to both A and B and its magnitude is equal to the area of the parallelogram spanned by A and B.

\(A\times B = (A_y \timesB_z - A_z \timesB_y)i + (A_z \timesB_x - A_x \timesB_z)j + (A_x \times B_y - A_y \times B_x)k\\A\times B = ((3 \times 2) - (1 \times 1))i + ((1 \times 4) - (5 \times 2))j + ((5 \times 1) - (3 \times 4))k\\= 1i + (-6)j + (-7)k\)

Area of the parallelogram spanned by vectors A and B:

The magnitude of the cross product A × B gives us the area of the parallelogram spanned by A and B.

Area = |A × B|

Area of the parallelogram spanned by vectors A and B:

Area = |A × B| =

\(\sqrt{(1^2 + (-6)^2 + (-7)^2}\\\sqrt{1+36+49\\\\\sqrt{86}\)

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Answer:

sorry I don't understand

Explanation:

please translate it in english

Decrease

The mathematical relationship between heat, internal energy and work done by the system is given as:

△U = Q + W

where △U is the change in the internal energy

W is the workdone by the system

Q is the heat energy in the system

Since the workdone by the system is negative, when a system does work, there is a depletion in the amount of energy possessed by the system.

Due to this loss of energy by the system as a result of the workdone, the internal energy decreases.

Two truckers are traveling directly away from each other at the same speed and one trucker sounds her horn at a frequency of 231 Hz and the other trucker hears a frequency of 214 Hz; thus the speed of the trucks is 25 m/s.


The frequency heard by the second trucker is lower than the frequency emitted by the first trucker, indicating that the trucks are moving away from each other. To calculate their speed, we can use the formula:
speed of sound = frequency x wavelength
where wavelength = speed of sound / frequency.
For the first trucker, the wavelength is:
wavelength = 343 / 231 = 1.485 meters
For the second trucker, the wavelength is:
wavelength = 343 / 214 = 1.603 meters
The difference in wavelengths is equal to the distance the sound waves have to travel extra due to the motion of the second trucker:
delta wavelength = 1.603 - 1.485 = 0.118 meters
As both trucks are moving at the same speed, this distance is equal to twice the distance one truck traveled:
delta wavelength = 2 x distance
distance = delta wavelength / 2 = 0.059 meters
Now we can calculate the speed of the trucks:
speed = distance / time = 0.059 / (1 / 231) = 25 m/s.

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The ground-level no concentration 57.2 micro gram per cubic meter.

Calculation:-

C ( 2, 0.1, 0) = 80/π × 5.65 × 289.9 × 233.6 × exp ( -100²/2 × 289.9 ²) × exp ( -100²/2× 255.6²)

=

 57.2 micro gram per cubic meter.

Wind speed affects climate forecasting, aviation and maritime operations, creation projects, increase and metabolism price of many plant species, and has limitless other implications. be aware that wind course is normally nearly parallel to isobars (and not perpendicular, as one might assume), due to Earth's rotation.

The concentration in air of a pollutant to which a human being is normally exposed, i.e. between the ground and a height of some 2 meters above it.

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To determine the velocity of the raindrops as measured by an observer in a moving car, we need to consider the relative velocities.

The velocity of the raindrops relative to the Earth is given as 5.7 m/s in the downward direction (negative y-axis).

The car is moving at 14.6 m/s to the right (positive x-axis).

To find the velocity of the raindrops as measured by the observer in the car, we need to add the velocities vectorially.

Since the car is moving to the right and the raindrops are falling vertically, the angle between their velocities is 90 degrees counterclockwise from the x-axis.

Using vector addition, we can calculate the magnitude and direction of the resultant velocity:

Resultant velocity magnitude = √[(velocity of raindrops)^2 + (velocity of car)^2]

Resultant velocity direction = arctan(velocity of raindrops / velocity of car)

Substituting the given values into the equations:

Resultant velocity magnitude = √[(5.7 m/s)^2 + (14.6 m/s)^2] ≈ 15.7 m/s (rounded to one decimal place)

Resultant velocity direction = arctan(5.7 m/s / 14.6 m/s) ≈ 21.4 degrees counterclockwise from the x-axis (rounded to one decimal place)

Therefore, as measured by an observer in the car, the velocity of the raindrops is approximately 15.7 m/s in magnitude, directed at an angle of 21.4 degrees counterclockwise from the x-axis.

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