A 240-volt, 2-amp motor is connected to a three-wire, 120/240-volt system. Connected between the black wire and neutral are four 200-watt, 120-volt lamps and a 120-volt, 1-amp motor. Between the red wire and neutral are three 200-watt, 120-volt lamps, one 1.67-amp motor and one 120-volt, 1-amp motor. (Round the FINAL answer to two decimal places.). How many amps flow in the red wire?

Answer:

zero

Explanation:

although force was applied as long as there's no movement ,no work has been done

mathematically;work=force×distance

work=2700×0

work=0J

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Neptune, being the furthest from the Sun, has the slowest orbital speed at approximately 5 kilometers per second, in accordance with Kepler's laws.

Based on Kepler's laws of planetary motion, the planet with the slowest orbital speed in our solar system is Neptune. This is because the speed at which a planet orbits the Sun is inversely related to its distance from the Sun. As Neptune is the furthest planet from the Sun with a vast orbital period of 165 Earth-years, it also has the slowest average orbital speed, which is approximately 5 kilometers per second. In contrast, Mercury, with an orbital period of only 88 Earth-days, moves much faster with an average speed of 48 kilometers per second.

Answer:

Even though the sun is much more massive and therefore has stronger overall gravity than the moon, the moon is closer to the earth so that its gravitational gradient is stronger than that of the sun.

Explanation:

Answer:

34.44 g.

Explanation:

The balanced equation for the reaction is:Fe + S → FeS,It is clear that 1.0 mol of Fe reacts with 1.0 mol of S to produce 1.0 mol FeS.We need to calculate the no. of moles of 60 grams of iron and 90 grams of iron sulfide:no. of moles of Fe = mass/atomic mass = (60.0 g)/(55.845 g/mol) = 1.074 mol.no. of moles of FeS = mass/molar mass = (90.0 g)/(87.91 g/mol) = 1.024 mol.∵ Fe reacts with S with (1: 1) molar ratio.∴ The no. of moles of S needed to react with Fe is 1.074 mol.∴ The no. of grams of S needed = no. of moles x molar mass = (1.074 mol)(32.065 g/mol) = 34.44 g.

psdfAnswer:

Explanation:

Water in a pool can conduct electricity, especially if it has impurities like salt, allowing electric charges to flow through it. This makes it dangerous to place electrical devices near the pool, as they can become pathways for electricity if they get wet, posing a risk of electric shocks.

When Peter's teacher says that water is a conductor, she means that water, especially when it contains impurities like dissolved salts, allows electric charges to flow through it. Thinking of it with an analogy, consider a lake full of fish where the lake represents the conductor and the fish represent the charge carriers. These carriers can move freely within the conductor, just like fish can swim anywhere in the lake, but they typically cannot leave the conductor.

Compared to insulators such as glass, where electrons and ions are bound tightly and cannot move freely, water with impurities such as salt water becomes a conductor, allowing charges to move much more easily. This is why having an electric stereo near a pool is dangerous; if the stereo were to fall in, the electricity could travel through the water and potentially cause harm to anyone in or near the pool.

In electrical terms, a good conductor will have charges quickly spread out and reach equilibrium, meaning any potential difference within a conductor is swiftly eliminated, similarly to how a calm body of water would evenly distribute a drop of water across its surface, with no currents flowing. Therefore, it's important to keep electrical devices away from conductors like a pool of water to avoid the risk of electric shocks or damage.

Answer:

An atom’s emission of light with a specific amount of energy confirms that electrons emit and absorb energy based on their position around the nucleus. The light emitted from an electron is a result of the electron's quantum jumps/leaps ( atomic electron transitions ) to and from different energy levels.

Acceleration = (change in speed) / (time for the change)

Change in speed = (speed at the end) - (speed at the beginning)

Change in speed = (0 km/sec) - (38 km/sec) = -38 km/sec

Acceleration = (-38 km/sec) / (36.3 sec) = -1,046.8 m/s²

Now, before we split up our points and go home, let's see what we've actually got here.

-- The plane's landing speed is about 111 times the speed of sound !

-- It rolls to rest 36.3 seconds after it touches down at this speed.

-- In order to do that, it pulls about 107 G's !

It seems to me that during the ground roll, the flight crew's eyeballs fall out, then they get ripped out of their seat belts and crash through the windshield, and the plane continues on with no life forms aboard. Then, maybe 1 second later, the drogue  parachute tears off, the tires on the landing gear blow out and get shredded, the remaining fuel sloshes through the walls of the tanks and evaporates catastrophically, the wings fall off and scrape along the ground in a shower of sparks, the cloud of fuel vapor ignites and then erupts in a ball of flame, the people downtown notice it on the horizon and marvel at it, and then any remaining flaming pieces of the plane come to rest in the dense pine forest and the apartment complex 2 miles past the end of the runway.

This is not my business.  I only used the numbers you gave me in the question.  My math and physics are flawless, I gave you a theoretically bullet-proof answer, and this is a privilege and a pleasure for you and will stand you in good stead.  You're welcome.

Answer:

Explanation:

Relation between power and illumination and distance  is as follows

[tex]I = \frac{P}{R^2}[/tex]

For first  case

[tex]3600 = \frac{60}{d^2}[/tex]

for second case

[tex]I = \frac{120}{(0.5d)^2}[/tex]

[tex]\frac{I}{3600} = \frac{d^2}{60} \times \frac{120}{.25d^2}[/tex]

I = 3600 x 8

= 28800 lux .

Final answer:

The illuminance on a surface from a 120-Watt bulb at half the distance of an initial setup with a 60-Watt bulb would be 28800 lux, due to the Inverse Square Law for Light and doubling of the bulb wattage.

Explanation:

The question is asking us to determine the illuminance on a surface from a 120-Watt bulb at half the distance of a previous setup with a 60-Watt bulb, which originally had an illuminance of 3600 lux. According to the Inverse Square Law for Light, illuminance changes with the inverse square of the distance. If the distance is halved (d/2), the illuminance increases by a factor of 4 (since (1/0.5)2 = 4). However, since we are also doubling the wattage of the bulb from 60-Watt to 120-Watt, and assuming that the bulb’s efficiency (lumens per Watt) stays the same, the illuminance would double again. Therefore, the new illuminance would be 3600 lux x 4 (due to distance) x 2 (due to wattage), equaling 28800 lux.

Answer:

since momentum = mass x velocity

m = 40m/s 0.058kg

m = 2.32

Answer:

The minimum feature size is 136.6 km.

Explanation:

It is given that,

Distance from planet Mars and Earth is, [tex]D=1.95\times 10^{11}\ m[/tex]

Diameter of the objective lens, d = 0.977 m

We need to find the minimum feature size, on the surface of Mars that your telescope can resolve for you. The expression for resolving distance is given by :

[tex]y=\dfrac{1.22D\lambda}{d}\\\\y=\dfrac{1.22\times 1.95\times 10^{11}\times 561\times 10^{-9}}{0.977 }\\\\y=136603.78\ m\\\\y=136.6\ km[/tex]

So, the minimum feature size is 136.6 km.

The speed of the pebbles when they hit the window is approximately 7.07 m/s.

Romeo wants to throw pebbles horizontally at Juliet's window. The window is 4.5m above him and 5.0m away from the wall. The pebbles' speed when they hit the window is about 7.07 m/s. This is calculated by determining the time it takes for the pebbles to reach the window vertically, using the equation t = [tex]\sqrt{\frac{2d}{g} }[/tex].

Then, the horizontal velocity is found by dividing the horizontal distance by the time of flight. The overall speed is the square root of the horizontal velocity squared, which is approximately 7.07 m/s.

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Romeo stands 4.5 meters below Juliet's window, 5.0 meters from the wall, and throws pebbles with horizontal velocity. Calculations based on time of flight and Pythagoras yield a speed of approximately 5.21 meters per second at impact.

To find the speed of the pebbles when they hit Juliet's window with only a horizontal component of velocity, we can use the following steps:

Calculate the time it takes for the pebbles to reach the window vertically.

We can use the formula for the time of flight for an object in free fall:

[tex]\[t = \sqrt{\frac{2d}{g}}\][/tex]

Where:

- t is the time of flight.

- d is the vertical distance (4.5 meters in this case, the height of the window).

- g is the acceleration due to gravity (approximately 9.81 m/s² on Earth).

Let's calculate t:

[tex]\[t = \sqrt{\frac{2 \cdot 4.5\,m}{9.81\,m/s^2}}\][/tex]

t is approximately 0.96 seconds.

Calculate the horizontal velocity.

Now that we know the time of flight (t), we can find the horizontal velocity [tex](\(v_x\))[/tex] by dividing the horizontal distance (5.0 meters) by the time of flight:

[tex]\[v_x = \frac{5.0\,m}{0.96\,s}\][/tex]

[tex]\(v_x\)[/tex] is approximately 5.21 m/s.

Calculate the overall speed when the pebbles hit the window.

To find the overall speed (v), we use the Pythagorean theorem because the pebbles' motion consists of both horizontal and vertical components:

[tex]\[v = \sqrt{v_x^2 + v_y^2}\][/tex]

Where:

- [tex]\(v_x\)[/tex] is the horizontal velocity (5.21 m/s, as calculated).

- [tex]\(v_y\)[/tex] is the vertical velocity. Since the pebbles are thrown horizontally, \[tex](v_y[/tex]= 0.

Now, calculate v:

[tex]\[v = \sqrt{5.21\,m/s)^2 + 0^2}\][/tex]

v is approximately 5.21 m/s.

So, the speed of the pebbles when they hit Juliet's window is approximately 5.21 m/s.

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The question probable may be:

Romeo gently throws pebbles at Juliet's window and wants the pebbles to hit the window with only a horizontal component of velocity. He is standing at the end of a rose garden, 4.5 meters below the window and 5.0 meters away from the base of the wall. What is the speed of the pebbles when they hit the window?

Answer:

It increases to three times its original value.  Given the same radius of wire and other constant property. current is directly proportional to the magnetic field.

B1=B2

MoI1/2pir=MoI2/2pir; cancel the same values  on both sides

B2/B1=6/2 =3

Explanation:

The magnetic field produced by a current-carrying wire depends on the current and distance from the wire.

The magnetic field produced by a current-carrying wire is given by the formula B = μi / (2πR), where B is the magnetic field strength, μ is the permeability of free space, i is the current in the wire, and R is the distance from the wire.

In this case, the current in the wire increases from 2 A to 6 A. As a result, the magnetic field at a distance of 0.01 m from the wire will also increase. However, the exact value of the magnetic field change can only be determined if the initial distance from the wire is known.

It is important to note that the magnetic field strength is inversely proportional to the distance from the wire, meaning that as the distance increases, the magnetic field strength decreases.

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Explanation:

Mass = 0.058Kg

Velocity = 40m/s

Momentum P = ?

P = mv

P = 0.058 × 40

P = 2.32Kgm/s

It will crash at a speed of 5 m/s and that's basically it.

Answer: Mercury is closest to the Sun and receives more of the Sun's concentrated light.

Explanation: I hope this helps :]

Answer:

The planets closest in the solar system rotation, or the "inner four"

Mercury recieves the most though.

(The inner four include Mercury, Venus, Earth, and Mars)

i hope this helps!

Explanation:

Answer:

The trajectories and thus the range of the car and the pumpkin are identical.

Explanation:

Trajectory of projectile is given by

[tex]Y=x \tan \theta-\frac{gx^2}{2u^2 \cos \theta ^2}[/tex]

Also range is given by,

[tex]R=\frac{u^2 \sin 2 \theta}{g}[/tex]

Trajectory and path both are independent on mass. Only depends on initial speed u and angle of projection [tex]\theta[/tex]

So Range and Trajectory both will be same.

Identical trajectory and equal range.

Therefore, The trajectories and thus the range of the car and the pumpkin are identical.

Answer:

The trajectories and thus the range of the car and the pumpkin are identical.

Explanation:

Answer:

The amount of mass that needs to be converted to release that amount of energy is [tex]1.122 X 10^{-7} kg[/tex]

Explanation:

From Albert Einstein's Energy equation, we can understand that mass can get converted to energy, using the formula

[tex]E= \Delta mc^{2}[/tex]

where [tex]\Delta m[/tex] = change in mass

c = speed of light = [tex]3 \times 10 ^{8}m/s[/tex]

Making m the subject of the formula, we can find the change in mass to be

[tex]\Delta m = \frac{E}{c^{2}}= \frac{1.01 \times 10^{3} \times 10^{7}}{(3 \times 10^{8})^{2}}= 1.122 \times 10 ^{-7}kg[/tex]

There fore, the amount of mass that needs to be converted to release that amount of energy is 1.122 X 10 ^-7 kg

Final answer:

Both the piece of wood and the piece of iron will experience the same buoyancy force because, according to Archimedes' Principle, the buoyant force depends only on the volume of the water displaced, which is equal for both objects since they have the same volume. Option C is correct.

Explanation:

The question asks which one of the two objects held fully under water, a piece of wood or iron with the same volume, will experience the greater buoyancy force upon release.

The answer is c. They experience the same buoyancy force. According to Archimedes' Principle, the buoyant force on an object submerged in a fluid is equal to the weight of the fluid displaced by the object. Since both the piece of wood and the piece of iron have the same volume and are submerged to the same depth, the volume of water displaced by each is the same. Therefore, the weight of water displaced by each object is the same, which means the buoyancy force experienced by both objects is the same, regardless of their densities or materials.

Answer:the answer is c

Explanation:

It balances correctly

Answer:

As the marble starts rolling down the roller coaster, the amount of potential energy stored in the marble decreases while its kinetic energy increases. Potential energy is also converted into heat energy due to friction.

Explanation:

As the marble rolls down the hill its potential energy is converted to kinetic energy (its height decreases, but its velocity increases). When the marble goes back up the loop its height increases again and its velocity decreases, changing kinetic energy into potential energy.

The two (2) ways in which the potential energy of a marble on a ramp can be increased are:

I. By placing the marble higher on the ramp.

II. By increasing the mass of the marble.

Potential energy can be defined as a type of energy possessed by an object (body) as a result of its position (height) above the earth.

Mathematically, potential energy (P.E) is calculated by using the following formula:

[tex]P.E = mgh[/tex]

Where:

Hence, potential energy (P.E) is highly dependent on two (2) main factors and these are:

1. Height above the ground.

2. The mass of an object.

In conclusion, the two (2) ways in which the potential energy of a marble on a ramp can be increased are:

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Answer:  Rancho de Area Comunes PV

Explanation: it means

Rancho de Area Comunes PV

In an AC Monte Roca PV System Profile, where the following are depicted:

Location

Commissioning

Production

Operator

PV system power

Module

And communication.

Answer:

The work done is 354.1032 Joules

Explanation:

To answer the question we note that the amount of work done is equivalent to the reduction in the kinetic energy of the bicyclist and bicycle.

Therefore, initial kinetic energy. KE[tex]_i[/tex] of the system is given by the following relation;

[tex]KE_i=\frac{1}{2} mv_{1}^{2}[/tex]

Final kinetic energy [tex]KE_f = \frac{1}{2} mv_{2}^{2}[/tex]

Where:

v₁ = Initial velocity = 3.95 m/s

v₂ = Final velocity = 1.31 m/s

m = Mass of the bicyclist and bicycle = 51.0 kg

Change in kinetic energy ΔKE;

[tex]\Delta KE = KE_f - KE_i[/tex]

[tex]\Delta KE =\frac{1}{2} mv_{2}^{2}-\frac{1}{2} mv_{1}^{2} = \frac{1}{2} m(v_{2}^{2}-v_{1}^{2}) = \frac{1}{2} \times 51 \times (1.31^{2}-3.95^{2}) = -354.1032 \ J[/tex]

Therefore, work done = -ΔKE = 354.1032 Joules.

Answer:

unsure

Explanation:

Answer:

Forgive me if I'm wrong but I think the answer is C.

Explanation:

I say this because liquid water is H20 (a combination of two elements) and Oxygen is a singular element. Compound is defined as a thing that is composed of two or more separate elements and thus, I think it's C.

The container contains a compound but is is not formed by dissolving oxygen in water. Water itself is a compound. And dissolved oxygen does not make a solution. Thus, option c is correct.

Oxygen is 8th element in periodic table. It is a non-metal and exists in gas form. Oxygen is soluble in water and the dissolved oxygen in water maintains the aquatic life.

A solution is formed by dissolving a solid solute in a solvent. Here, oxygen is in gas form and it  does not form a solution with solvent water. Hence, the container does not containing a solution. After dissolving oxygen no longer exists as an element also.

A compound is formed by the combination of different atoms. Water is a compound formed from hydrogen and oxygens. Water does not form a new compound by dissolving a gas. Thus, the container contains not a new compound but the water itself.

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Answer:

B elements

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

Answer:

A

Explanation: The bubbles will shrink , some may vanish. SInce the bottle is unopened , squeezing the bottle will increase the pressure on the ca p.

Answer:

B) The bubbles will grow, and more may appear.

Explanation:

Answer:

Any other color, other than Red, Green, and Blue.

Explanation:

Those three are your only primary colors.

Answer:

Chemical potential energy is a form of potential energy related to the structural arrangement of atoms or molecules. This arrangement may be the result of chemical bonds within a molecule or otherwise. Chemical energy of a chemical substance can be transformed to other forms of energy by a chemical reaction.

Explanation:

Answer:

1.022 x 103 N.m

Explanation:

Solution

Given:

The weight of the block of mass m₂ is :

w₂ = m₂*g

Where

w₂ = 39 x 9.8 = 382.2 N

Then,

The weight of the block of mass m₁

w₁= m₁*g;

so,

w₁ = 12 x 9.8 = 117.5 N

Thus,

The tension wrapped in cord on drum (80 cm) T₁ = F - w₁

Now,

T₁ = 1200 - 117.5

T₁ = 1082.5 N

The tension  wrapped in the cord on drum (41 cm) T₂ = w₂;

T₂ = 382.2 N

Hence,

We calculate net torque on the center of the drum:

The net torque = T₁ x 0.8 + T₂ x 0.41;

= 1082.5 x 0.8 + 382.2 x 0.41;

= 1.022 x 103 N.m

Therefore, the resulting torque applied to the system is 1.022 x 103 N.m

Answer:

The proposal is not accepted because of greater reduction in work output and efficiency

Explanation:

The following factors influence the turbine output with the suggestion below

1 - Enthalpy at the turbine exit

2 - Heat losses in the turbine

The work output of the steam turbine is

[tex]W=m(h_1-h_2)-Q_{loss}[/tex]

Where,

m is the mass of thee steam flowing through the turbine,

h₁ is the specific enthalpy of the steam leaving the turbine, and

[tex]Q_{loss}[/tex] is the heat loss from the turbinee due to the cooking water.

Enthalpy at the turbine exit; on cooling the turbine with the cooling water, the beck pressure of the turbine is decrease.

this further decrease the specific enthalpy at the turbine exit.

the result is greater reduction in the work output and efficiency,

Heat losses in water in the turbine;

On passing the cooking water around the turbine mst of the heat is carried away by this cooliing water. As the heat losses increases in the turbine, there is a greater reduction in the work output and efficiency.

Therefore, The proposal is not accepted because of greater reduction in work output and efficiency

Although the proposal to cool the steam in the turbine with water might reduce the local entropy, it would not increase the overall work output. Cooling the steam would also decrease its enthalpy and potentially reduce the turbine's output. Instead, optimizing processes to minimize entropy production would be a better way to improve turbine efficiency.

The proposed solution to control the entropy of steam by cooling the steam turbine assumes that reducing both the entropy and enthalpy of the steam at the turbine exit will increase the work output. While it's true that irreversibilities — such as heat transfer and friction — increase the entropy and can reduce the turbine's efficiency, directly cooling the steam in the turbine would not necessarily lead to increased output. This is due to the second law of thermodynamics, which states that the entropy of a closed system will not decrease. Thus, while local entropy may be decreased, the overall entropy in the system (including the cooling water) will still increase.

Moreover, cooling the steam would actually decrease its enthalpy, which would reduce the amount of available energy to perform work, thus potentially decreasing the turbine's output. Therefore, this proposal may not be the best method of increasing the efficiency of a steam turbine. The improvement in turbine efficiency would be better done by optimizing the processes to minimize entropy production as a result of irreversibilities.

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