a straight, 2.80 m wire carries a typical household current of 1.50 a (in one direction) at a location where the earth's magnetic field is 0.550 gauss from south to north.

Answer:

Explanation:

To find the direction of the displacement vector, we have to solve for the ratio of both displacements, and furthermore the inverse tangent of the ratio.

Given data

200km east represents the x axis

70 km north represents y axis

the direction of the resultant is given as

∅= tan-1x/y

∅=tan-1 200/70

∅= tan-120/7

∅= tan-12.85

∅= 70.66°

hence the direction of the resultant is 70.66°

Answer:

The starting velocity.

Explanation:

We must understand that this equation comes from the following equation of kinematics.

\(v_{f}=v_{o}+a*t\)

where:

Vf = final velocity = 33 [m/s]

Vo = starting velocity [m/s]

a = acceleration = 3 [m/s²]

t = time = 30 [s]

So, these values can be assembly in the following way:

\(v_{f}=v_{o}+a*t\\a*t=v_{f}-v_{o}\\3=\frac{33-v_{o}}{30}\)

Answer: what characterizes moral development in mid to late childhood is

People at this level of moral development base their decisions on what their parents and/or law enforcement says is right. Stage 3 is about social conformity. ... Stage 4 is all about law and order for all. For example, someone may think, 'If I steal, I will break the law and breaking the law is wrong.Feb 17, 2016

Explanation:

Paul Cezanne's Still Life with Apples in a Bowl (1879-83) represents a break with the tradition of using linear perspective in art.

One of the pioneers of modern art, Cezanne used a novel approach to painting at the time. In his still life paintings, Cezanne represented things utilizing a system of flattened planes and simplified forms rather than the conventional perspective techniques that provide the impression of depth and space.

Additionally, he played around with color, relying on color blocks rather than shading and modeling to convey a sense of volume and form.

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In order to determine which orientation results in a larger depolarization factor for the similar dielectric ellipsoids placed in an electric field, we need to consider the shape and alignment of the ellipsoids with respect to the electric field.

The depolarization factor measures the reduction in the electric polarization of a material due to its shape and alignment in an electric field. It is influenced by the geometry of the material and how it interacts with the electric field.

Qualitatively, if the ellipsoids are aligned in such a way that their major axes are parallel to the electric field lines, the depolarization factor would be smaller. This is because the electric field would act along the long axis of the ellipsoid, resulting in less distortion of the polarized charges inside the material. The polarization would be more effectively aligned with the electric field, minimizing the depolarization effect.

On the other hand, if the ellipsoids are oriented such that their major axes are perpendicular or at an angle to the electric field lines, the depolarization factor would be larger. In this case, the electric field would act in a direction that is not aligned with the major axis of the ellipsoid, causing more distortion and misalignment of the polarized charges inside the material. This results in a larger depolarization effect.

Without a specific diagram or more information about the orientations shown in Figure P5.5, it is difficult to determine the exact orientation with the larger depolarization factor. However, based on the general understanding of the relationship between alignment and the depolarization effect, the orientation where the major axes of the ellipsoids are perpendicular or at an angle to the electric field lines is likely to result in a larger depolarization factor.

Answer:

Force= 1000 Newtons. Distance= 150 metres. Work= 150000 Joules. So, the work done by crane that lowers 1000 Newton's of a material a distance of 150 meters is 150000 Joules.

Since T = 2πm/Be the period of revolution of the electron is independent of velocity and radius of path

For an electron moving in a uniform magnetic field, the force on the electron is given by

F = Bev where

Also, this magnetic force equals the centripetal force on the electron, F'

F' = mv²/r where

Since both forces are equal,

F = F'

Bev = mv²/r

Be = mv/r

We know that angular speed, ω = v/r. So,

Be = mω

Also, angular speed, ω = 2π/T where T = period of revolution of electron

So, Be = m2π/T

Making T subject of the formula, we have

T = 2πm/Be

so, since T = 2πm/Be the period of revolution of the electron is independent of velocity and radius of path

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Answer:

A. It interrupts the low of electrons when it is open.

Explanation:

The switch in an electrical circuit interrupts the flow of electrons when it is open. Therefore, option (A) is correct.

The electric circuits can be described as closed-loop or paths, forming a network of electrical components where electrons flow. The path is generally made using electrical wires. The start-off point from where the electrons start flowing is known as the source, whereas the point where electrons leave the electrical circuit is known as the return.

The switch can be described as a small gap in the circuit. There are many types of switches. A switch is used to open or close an electrical circuit. A switch can be described as an electrical component that can be used to turn on and turn off any equipment.

When the switch of an electrical circuit is off, the circuit is open, and there is no flow of current or electrons. The current flow when the circuit is closed, therefore the switch should be on.

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Answer:

gases......is the right ans. it means elements..

Answer:

The atomic number

Explanation:

Answer:

It would take 3 seconds approximately.

Explanation:

since it's going to stop it's final velocity is 0m/s

Now,

acceleration = (v-u)/t

or, a = (0-35)/t

or, -12 = -35/t

or, t = -35/-12

so, t = 2.9 seconds.

The speed of the ambulance is 33.35 m/s and the frequency heard after the ambulance passes is 667.07 Hz.

Calculation:-

V = f(344 - 15.6/344 - vs)

740 = 700(344 - 15.6/344 - vs)

344 - V s = 70/74 (344 - 15.6)

344 - V s = 310.64

  V s = 33.35 m/s

After pass

F = 700 ( 344 + 15.6/344 + 33.35)

   = 700 × 359.6/377.35

 F = 667.07 Hz

Frequency is the wide variety of occurrences of a repeating event in line with a unit of time. The time period frequency refers to the variety of waves that pass a set factor in unit time. It additionally describes the number of cycles or vibrations undergone for the duration of one unit of time with the aid of a body in periodic motion.

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2 seconds into its acceleration, the jet was moving at 430 km/hr

From the question,

We are to determine how fast the jet was going 2 seconds into its acceleration.

From one of the equations of kinematics for linear motion, we have

v = u +at

Where

v is the final velocity

u is the initial velocity

a is the acceleration

and t is the time

Now, we will determine the velocity, v, at time 2 seconds.

From the given information

u = 400 km/hr

a = 15 km/hr/s

and t = 2 secs

Putting the parameters into the formula, we get

v = 400 + (15 × 2)

v = 400 + 30

v = 430 km/hr

Hence, 2 seconds into its acceleration, the jet was moving at 430 km/hr

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The mass of a pure platinum disc can be gotten by multiplying the density with the volume.

Therefore the mass is 2418.2 grams or 2.4182 kilograms.

A body's mass is an inherent quality. Prior to the discovery of the atom and particle physics, it was widely considered to be tied to the amount of matter in a physical body.

The kilogram is the primary mass unit in the SI.

The resistance of the body to acceleration in the presence of a net force can be measured as mass.

Due to the lower gravity on the Moon, an object would weigh less than it does on Earth while maintaining the same mass. This is due to the fact that mass, coupled with gravity, determines the strength of weight, which is a force.

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What is the mass of a pure platinum disk with a volume of 113 cm3? The density of platinum is 21.4 g/cm3.

Give your answer in grams and kilograms.

According to the question, the work done by a car is calculated as 144Nm.

Force may be defined as a process of pushing or pulling on an object that significantly produces acceleration in the body on which it acts. It is an external agent capable of changing a body's state of rest or motion. It has a magnitude and a direction.

According to the question,

The force applied on a car = 18 N

The displacement made by a car = 8m.

Now, the work done is calculated with the help of the given formula:

                           = 18 N × 8m = 144Nm.

Therefore, the work done by a car is calculated as 144Nm.

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Answer:

This problem involves the concept of a random walk, which is a mathematical model of a path consisting of a succession of random steps.

The question asks for the distance, R(n), from the center of a star after n steps of a photon, assuming a 2D random walk.

The random walk in two dimensions has a step length of A_i and the direction of the steps is uniformly distributed in [0, 2π). The change in position after each step can be written in Cartesian coordinates (Δx, Δy), where Δx = A_i cos(θ_i) and Δy = A_i sin(θ_i).

The displacement from the center after n steps is given by the vector sum of all the individual steps. This vector sum can be written in terms of its Cartesian coordinates, (X, Y), where X = Σ Δx and Y = Σ Δy. This sum over n random vectors is itself a random variable. The net displacement R(n) from the center of the star after n steps is given by the magnitude of the net displacement vector:

R(n) = √(X² + Y²)

Because each step is independent and has a random direction, the expected value of the cosine and sine for any step is zero. This means that the expected values of X and Y are both zero.

However, the mean square displacement is not zero. Because the steps are independent, the mean square displacement in each direction is additive. For a 2D random walk:

<X²> = Σ <(Δx)²> = n <(A cos θ)²> = n A²/2

<Y²> = Σ <(Δy)²> = n <(A sin θ)²> = n A²/2

Because <X²> = <Y²>, we can write:

<R²> = <X²> + <Y²> = n A²

So, the root mean square distance (the square root of the mean square displacement) after n steps is:

R(n) = √(<R²>) = √(n) * A

Therefore, the distance R(n) that the photon is expected to be from the center of the star after n steps grows as the square root of the number of steps, with each step having a length A. Please note that this result holds for a 2D random walk. A real photon in a star would be performing a 3D random walk, which would have slightly different characteristics.

Answer:  Either it's B. The seismic waves frequency also changed multiple times.

or

D. As the wave passed through less dense material, the speed of the wave increased.

Explanation: I'll let you choose because I'm stumped on which one it is. They both sound like they would fit perfectly with the question and I've tried doing research on it but nothing can prove either one right or wrong for me.

I know seismic waves can change frequency given the density of rock\ground it's going through.

"The propagation velocity of seismic waves depends on density and elasticity of the medium as well as the type of wave. Velocity tends to increase with depth through Earth's crust and mantle, but drops sharply going from the mantle to outer core."

However, B. also fits nicely.

"Temperature tends to lower the speed of seismic waves and pressure tends to increase the speed. Pressure increases with depth in Earth because the weight of the rocks above gets larger with increasing depth."

Nevertheless, I hope it helps.

If the speed changes multiple times, the seismic wave's frequency also changed multiple times. Option B is correct.

The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point, while the trough is the lowest.

The relationship between the wave's wavelength, frequency, and speed is given as

wavelength = speed of wave / frequency

A seismologist who studies earthquakes sees that a seismic wave that traveled 500 km through Earth changed speeds multiple times.

If the speed changes multiple times, the seismic wave's frequency also changed multiple times. Because both area related to each other.

Hence, option B is correct.

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What is common among all the graphs is that they all show an object that is moving.

In the distance time graph, we have the distance on the vertical axis and we have the time on the horizontal axis and the shape of the plots may differ depending on the nature of the motion of the objects.

Graphs of distance vs time help us to examine motion by showing how an object has moved over time. All objects shown on a distance vs. time graph are shifting positions over time, regardless of the graph's specific shape or slope, and the graph reveals information about the direction and speed of their motion.

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The focal length of the lens is approximately 6.11 cm.

The picture will be significantly more diminished and inverted. For a sharp picture of the flame, the screen must be moved away from the lens on the opposite side while the burning candle is moved towards the lens on one side. The size of the inverted picture grows.

We can apply the lens equation to this issue to find a solution:

1/f = 1/d0 + 1/di

Substituting the given values into the equation, we get:

1/f = 1/7.0 + 1/48

Simplifying the right side of the equation, we get:

1/f = (48 + 7.0) / (7.0 * 48)

1/f = 55.0 / 336

Multiplying both sides by f, we get:

f = 336 / 55.0

f ≈ 6.11 cm

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If the nuclides belong to the same element, then, they have equal number of protons. However, they have different number of protons in order to be different nuclides.

Then, you can conlude:

2) the same number of protons but different numbers of neutrons.

Answer:

Let vector C(x,y) be A-B.

Explanation:

Now the direction is given by: tan-1(y/x)

Use the correct angle on the basis in which quadrant the vector C lies.

Magnitude = sqrt(x^2 + y^2)

(a) The density of the mystery fluid, ρi, is given by the equation ρi = (h2 - h1) * ρHg. (b) In this situation, pρHg > pρi is true. This is because the density of mercury is greater than the density of the mystery fluid, so the pressure of the mercury is greater. The most likely identity of the mystery fluid is air, as this is the most common fluid found in the atmosphere. (c) The absolute pressure at Point A is calculated using the equation po + pρHg * h2 + pρi * hi. (d) Using the numerical values given, the height hs is calculated to be 2.55 cm. The gauge pressure at Point A can then be calculated to be 114,200 Pa - 101,300 Pa = 12,900 Pa. (e)

According to Newton's third law

Or

\(\\ \tt\longmapsto F_x=-F_x\)

Answer:

When an object exerts a force on another force, there will be a force in the opposite direction exerted by the second object. This force is called reaction force.

For example, when an object is sliding, the reaction force is the friction that acts against the movement.

Hope this Helps!

Have a wonderful day!

Answer:

Radio telescopes are LARGER than optical telescopes and this is because radio wavelengths  are much longer than optical wavelengths

Explanation:

In general radio telescopes are LARGER than optical telescopes and this is because radio wavelengths  are much longer than optical wavelengths.

The main difference between radio telescopes and other telescopes especially optical telescopes is based on size and wavelength of both telescopes  

Option C. The heat absorbed or lost by a substance while it's changing state  correctly describes latent heat

Latent heat is the heat absorbed or lost by a substance while it is changing state.

The latent heat is a type of heat that is transferred during phase change, i.e., while a substance undergoes a change of state.

For example, when ice melts into liquid water, or when liquid water evaporates into water vapor, heat is absorbed from the surroundings.

Latent heat is not associated with a temperature change; rather, it's associated with a change of state.

For instance, the temperature of water remains at 100°C while boiling.

When water is boiling, the latent heat of vaporization is absorbed and utilized to break the hydrogen bonds holding water molecules together to change water from the liquid phase to the gaseous phase.

When the water is boiling, adding more heat won't increase the water's temperature, instead, the extra heat will be absorbed to change the phase of water molecules.

Therefore, the correct answer to the given question is option C: The heat absorbed or lost by a substance while it is changing state.

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Once it was halfway to home plate, the ball would have dropped 1.75 meters vertically.

How quickly anything is traveling is determined by its speed. The amount of space covered in a given amount of time is a scalar quantity. Calculating speed involves dividing the distance traveled by the time needed to complete that distance.

The vertical displacement of the ball when it is halfway to home plate can be calculated using the equations of motion, assuming the pitch is delivered on a level field.

Gravitational acceleration is -9.81 m/s2 and the pitch's initial vertical velocity is zero. How long does it take for the pitch to go halfway to home plate?

t = d/v

t = 19 m / (32.0 m/s)

t = 0.594 s

The formula d = vit + 1/2at2 d = 0 + 1/2(-9.81 m/s2) *(0.594 s)2 d = -1.75 m can be used to determine the vertical displacement of the ball during this time.

The ball falls downhill vertically as expected, as indicated by the negative sign. Once it was halfway to home plate, the ball would have dropped 1.75 meters vertically.

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The mass of the sour cream that should be added is 0.68 kg.

Mass of the water is calculated as follows;

mass = density x volume

mass = (1 kg/L) x 0.5 L = 0.5 kg

Heat gained by the sour cream = Heat lost by the water

\(m_s c_s\Delta \theta _s = m_wc_w\Delta \theta _w\\\\m_s = \frac{m_wc_w\Delta \theta _w}{c_s\Delta \theta _s} \\\\\)

where;

\(m_s = \frac{0.5 \times 4184 \times (80 - 40)}{3510 \times (40 - 5)} \\\\m_s = 0.68 \ kg\)

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The dependent, independent, and controlled variables​ are as follows:

1. Dependent - The effect of lime urea table salt and compost on the soil

2. Independent - The soil on which the elements are incorporated.

3. Controlled variable - The height of the plants.

The dependent variable is that which is tested in the experiment and in this experiment, Chandani is testing the effect of lime, urea, table salt, and compost on the soil.

The independent variable is the altered element in the experiment and for this experiment, this is the soil that receives different additives. Finally, the controlled variable is that which remains constant and that is the height of each plant that the researcher checks.

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