the train in problem 34 is moving away from the detector. now what frequency is detected by a stationary train? a train moving away from teh first train at a speed of 21 m/s?

The temperature of the air at the given speed of sound wave is 142.8 ⁰C.

The temperature of the air at the given speed of sound and frequency is calculated as follows;

\(v = 332\sqrt{1 + \frac{T}{273} }\)

v = fλ

v = 745 x 0.55

v = 409.75 m/s

Now, solve for the temperature;

\(409.75 = 332 \sqrt{1 + \frac{T}{273} } \\\\1.234 = \sqrt{1 + \frac{T}{273} }\\\\1.234^2 = 1 + \frac{T}{273}\\\\0.523 = \frac{T}{273} \\\\T = 142.8 \ ^0C\)

Thus, the temperature of the air at the given speed of sound wave is 142.8 ⁰C.

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The electric potential relative to zero at infinity at the center of the square because of the four charges is found to be 4.16 x 10⁴ v.

The distance from the center of square and the magnitude of the charges are same. So, we can find the electric potential of one charge and then multiply it by 4 to get the final answer.

The electric field at the center relative to infinity,

v = -Kq/r, r is the distance of the charge and the center, q is the charge and K is the constant. q = 2 x 10⁻⁶, K = 9 x 10⁹ and r = 1.72m.

Putting all the values,

v = - 9 x 10⁹ x 2 x 10⁻⁶/1.72

v = 1.04 x 10⁴.

For all the charges,

V = -4v

V = 4.16 x 10⁴ v.

So, the electric potential is found to be 4.16 x 10⁴ v.

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Amperage, also known as ampacity, is a measure of the amount of electric current that a conductor can safely carry without overheating. The ampacity of a conductor is determined by its size, material, temperature, and environment.

The unit of measurement for ampacity is the ampere (A), which is the flow of one coulomb of electric charge per second. In electrical circuits, the ampacity of conductors is often expressed as the maximum current that the conductor can carry without exceeding its temperature rating or melting.

To determine the total amperes (or ampacity) allowed for your house, you need to calculate the sum of the current rating of all the electrical circuits in your home. Here are the steps you need to follow:

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The increasing axon diameter increase the conduction velocity conduction in resistance capacitance because of the possibility of smooth movement of electrons in the capacitor and the smooth flow of charges in it that supports the electric current to flow in a smooth manner.

Capacitor is a body which is used to store the electricity in it and we can use it in the time when we need it in the circuit. also we can use the capacitor in the jumping the charge and electricity from the spark gap in the circuit to attain a good height and velocity as we needed it. by this information we can primarily consider that the increasing axon diameter increase the conduction velocity conduction in resistance capacitance because of the possibility of smooth movement of electrons in the capacitor and the smooth flow of charges in it that supports the electric current to flow in a smooth manner.

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Centripetal acceleration, the acceleration of a body traversing a circular path. Because velocity is a vector quantity (that is, it has both a magnitude, the speed, and a direction), when a body travels on a circular path, its direction constantly changes and thus its velocity changes, producing an acceleration.

Answer: 12

Explanation:

The resultant vector is  12 unit.

When two vectors point in the same direction, their sum is equal to the total of their respective magnitudes pointing in the same direction.

When two vectors are pointed in opposite directions, the resultant vector is pointed in the direction of the larger vector and is equal to the difference between their magnitudes.

Here, one vector of 15 unit is acting to the left and another vector of 3 unit acting rightwards. As they are acting in opposite direction, vector summation of two vector will be equal to the value of subs traction of their magnitude.

So, Resultant vector= 15 unit + (-3 unit)

= 15 unit - 3 unit

= 12 unit.

Hence, the resultant vector will be 12 unit.

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The m dot = 1A1v1 = (821 kg/m3)(0.618 m2)(2.117 m/s) 1077 kg/s is the flow rate of the oil.

fluid moving through a horizontal pipe P1 + ½ρv12 = P2 + ½ρv22. The pressure will depend on the fluid's speed if it is flowing frictionlessly through a horizontal pipe with a variable cross-sectional area as a liquid (or a gas that is not being compressed).

The fluid's velocity and cross-sectional area before and after the pipe's constriction can be compared using the continuity concept.

ρ1A1v1 = ρ2A2v

Moreover, we may link the fluid's pressure and velocity before and after the constriction using Bernoulli's equation:

P1 + 1/2ρ1v1² = P2 + 1/2ρ2v2²

v2 = (ρ1/ρ2) × (A1/A2) × v1

P1 + 1/2ρ1v1² = P2 + 1/2ρ1(A1/A2)²(v1)²

Solving for v1, we get:

v1 = sqrt(2(P1 - P2)/ρ1(1 - (A1/A2)²))

v1 = sqrt(2(7980 - 5985)/(821)(1 - (0.618/0.223)^2)) = 2.117 m/s.

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The correct answer is (b) μMg, where μ is the coefficient of static friction between the box and the table, M is the mass of the box, and g is the acceleration due to gravity.

The static frictional force acts in the opposite direction of the tension force T applied by the string, and its magnitude must be equal to or greater than T to prevent the box from moving. Therefore, we can set up an equation: μMg ≥ T. Since we know that the box is not moving, the static frictional force is equal to T, so we can solve for μ: μ ≥ T/Mg. This tells us that the coefficient of static friction must be greater than or equal to T divided by the weight of the box, which is given by Mg. So, the magnitude of the static frictional force acting on the box is μMg.

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Answer:

7.5 m/s^2

Explanation:

v=at

a= v/t

Since you have to v so

(v2- v1) /t

(15-0)/2= - 7.5

The sun is Yellow, red, orange, and blue. Therefore option B is correct.

The star is moving toward an observer. Therefore option B is correct.

39. The type of radioactive decay represented by the equation provided Gamma. Therefore option A is correct.

40. The statement is completed correctly by the information which states that the coal in Alberta has a lower carbon content than coal in other parts of Canada, resulting in reduced greenhouse gas emissions.

29. graph B depicts the relationship between gravitational field strength and the mass of the International Space Station orbiting Earth.

30. The correct sequence of colors representing the changing temperature from the surface to the atmosphere of the sun is Yellow, red, orange, and blue. Therefore option B is correct.

1. When a star undergoes a blue shift, it indicates that the star is moving toward an observer. Therefore option B is correct.

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Answer:

Explanation:

To find the net force on particle q1, we need to calculate the force between each pair of particles and then add them together. The force between two particles is given by Coulomb's law:

F = k * (q1 * q2) / r^2

where F is the force, k is the Coulomb constant (approximately 8.99 x 10^9 N*m^2/C^2), q1 and q2 are the charges of the two particles, and r is the distance between them.

The force between q1 and q2 is:

F = 8.99 x 10^9 N*m^2/C^2 * (8.0 uC * 3.5 uC) / (0.10 m)^2

The force between q2 and q3 is:

F = 8.99 x 10^9 N*m^2/C^2 * (3.5 uC * -2.5 uC) / (0.15 m)^2

The net force on particle q1 is the sum of the two forces, which can be positive, negative or zero, depending on the direction of the force.

It's important to note that this calculation is based on the assumption that the charges are point charges, and that the forces are acting along a straight line. In real-world situations, charges are usually distributed over a certain volume, and the forces acting on the charges can be affected by various factors such as the presence of other charges or conducting materials, which can change the net force.

The plane travels a distance of 325 miles if the airplane travels for 2.5 hours at an average speed of 130 miles per hour. Using the distance formula (d = rt), we can calculate the distance.

To find the distance traveled by the airplane, we can use the distance formula, which is represented as d = rt. In this formula, "d" represents the distance, "r" represents the rate or speed at which the object is traveling, and "t" represents the time taken for the travel.

Given that the airplane travels for 2.5 hours at an average rate of 130 miles per hour, we can substitute these values into the formula. The rate of the airplane is 130 miles per hour, and the time taken is 2.5 hours.

Using the formula, we can calculate the distance traveled as follows:

d = rt

d = 130 mph × 2.5 hours

Multiplying the rate (130 mph) by the time (2.5 hours) gives us:

d = 325 miles

Therefore, the airplane travels a distance of 325 miles during the 2.5 hours of travel at an average rate of 130 miles per hour.

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Answer:

   L = 40 cm

Explanation:

A microscope is an optical instrument built by two lenses in such a way that the image of the first is formed within the distance of the other (eyepiece), so that the latter creates an enlarged virtual image of the object, for which the magnification of the microscope is the same to the multiplication of the magnification of each lens

    M = - L / f₀ (25 cm /\(f_{e}\))

where fo and fe are the focal lengths of the objective and eyepiece, 25 cm is the near vision distance and L is the length of the microscope

     L = - M f_{o} f_{e} / 25

let's calculate

     L = - (-100) 2 5/25

      L = 40 cm

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Actually Welcome to the concept of Graviatoonal Energy.

P = mgh

hence,

E = (7)*(9.8)*(4) = 274.4 joules

==> Energy = 274.4 J

The speed at which the motor will run on no-load can be determined by using the concept of the motor's input and output power.
Given:
Full-load power (output power) = 7.5 kW
Full-load efficiency = 86% = 0.86
Total no-load input power = 600 W
First, we can calculate the full-load input power using the efficiency formula:
Full-load input power = Full-load power / Full-load efficiency
Full-load input power = 7.5 kW / 0.86 = 8.72 kW
Now, we can determine the ratio of the no-load input power to the full-load input power:
Power ratio = Total no-load input power / Full-load input power
Power ratio = 600 W / 8.72 kW = 0.0688
Since power is directly proportional to the speed of the motor, we ca
calculate the speed on no-load using the power ratio
No-load speed = Full-load speed * √(Power ratio)
No-load speed = 1,200 r/min * √(0.0688) ≈ 292.78 r/min
Therefore, the motor will run at approximately 292.78 r/min on no-load.
1.2.2 To reduce the speed to 1,000 r/min when giving full-load torque, we need to add a resistance in the armature circuit. The speed of the motor is inversely proportional to the armature circuit resistance.
Given:
Full-load speed = 1,200 r/min
Target speed = 1,000 r/min
Using the speed ratio formula:
Speed ratio = Full-load speed / Target speed
Speed ratio = 1,200 r/min / 1,000 r/min = 1.2
Since the speed is inversely proportional to the resistance, we can calculate the resistance ratio:
Resistance ratio = 1 / Speed ratio
Resistance ratio = 1 / 1.2 ≈ 0.833
Now, we can calculate the required resistance to be added in the armature circuit:
Required resistance = Armature circuit resistance * Resistance ratio
Required resistance = 0.3 ohm * 0.833 ≈ 0.25 ohm
Therefore, a resistance of approximately 0.25 ohm needs to be added in the armature circuit to reduce the speed to 1,000 r/min when giving full-load torque, assuming the flux is proportional to the field current.

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Answer:

C. Delegated

Explanation:

Answer:

its letter C

Explanation:

just trust

Answer:

4000N left

Explanation:

6000N-1000N-1000N

6000N-2000N

8000N

Answer:

HOPE IT HELP YOU A LOT :)

I prove it also .

Answer:

Newtons Second law of motion states that"The rate of change of momentum is directly proportional to the force applied"

Almost 100 kPa is the atmospheric pressure. The entire top of the manuscript is under downward pressure. Only a portion of the bottom layer of the book may be subject to the upward pressure.

Answer: Force=500

Explanation:

We use ATP since it says "the downward force from atmosphere" and ATP equals 100kPa x 0.05m2 = 5000N.

How much pressure is there in the air?

The air atmospheric pressure near sea level, or 14.7 pounds every square inch, is equal to one ATM unit of measurement. Likewise known as standard atmospheric pressure.

Why is atmospheric pressure created?

The several layers of the atmosphere's atmosphere are made up of molecules as well as atoms that are constantly moving in random ways. Despite being minuscule, they still exert pressure that seems to humans as a force when they strike a surface.

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Answer:

A.9.0 A

Explanation:

This is multiplication then add.

3*2+3=9.0

And that is how we get the answer.

Answer:

The process of comparison of unknown quantity with the help of known standard quantity is known as measurement...Hope this helps:)

Answer:

the comparison of an unknown quantity with the known quantity.

Explanation:

...........................................................................................................................

Answer:

answer https:/

Explanation:

apparatus.com

Due to the fact that they are compound nature, primary and secondary colors are combined to create tertiary or intermediate hues. Yellow-green, red-orange, yellow-green, orange, blue-green, and blue-violet.

Red-orange, yellow-orange, blue-green, violet, and yellow-green are examples of intermediate hues. contrasting hues on the color wheel, such as yellow and violet, blue and orange, and red and green. Contrasting colors.

One dominant hue dominates a normally balanced triadic color scheme, with the other two equally spaced colors both acting as accents. Regardless of which specific colors are used, triadic colors stand out from one another and create a dynamic, energetic color palette.

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The given statement is true.

So, the statement "two connected points objects pass through the same set of three points, the shapes created by each may be different, depending on the order in which each object was plotted" is true.

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Answer: Silicon is better

Hope it helps!!

Answer:

B

Explanation:

According to boyle's law for a gas the pressure and volume are inversely proportional.this simply means when one increases the other one reduces and when the other one reduces the other increases.so in this case the volume increased to twice it original amount meaning the pressure will reduce to half the volume.

I hope this helps

Explanation:

weight of the piano = mg

w = 99 x 10 =990 N