The unit for work can be written as __________ or as the nickname ______
N or Joule
W or Joule
Nm or Joule
MN or joule

The voltage is 150 V

Ohm's Law is a fundamental principle in electrical engineering that states the relationship between current, voltage, and resistance in an electrical circuit. It states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points, and inversely proportional to the resistance (R) of the conductor. This relationship is mathematically expressed as:

I = V / R

Using the Ohm'slaw;

V = IR

I =Current

R = resistance

V = 10 ohm * 15 amps

V = 150 V

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Answer:

1. light is electromagnetic radiation within the portion of electromagnetic spectrum that is perceived by the human eye.

2. it's measured in footcandles or lux- it is the amount of light (lumens) falling on a Surface (over any given square foot or square meter). therefore, light intensity is measured in terms of lumens per square foot (footcandles) or lumens per square meter (lux).

3. natural light,, which produces heat and color comes from the radiation given off by the sun. It is then filtered through the Earth's atmosphere and absorbed by plants. Artificial light sources can consist of a filament that uses electricity or halogen gas to go or an electronic device that emits light.

4. most of our conscious vision stem from photoreceptors in the retina, the light-sensitive layer at the back of our eyeball. In animals with backbones (vertebrates) cells that detect light for vision are vaguely shaped like rods or cones giving them their familiar names.

5. there is a difference between ambient and task lighting. task lighting provides focus light so you can see better perform a certain task. while ambient fixtures offer general lighting for your home, distribute light evenly as well as helps create a mood.

6. what are the types of light sensors

• photoresistors (LDR)

• photodiode (how they look like)

• phototransistors

Explanation:

I hope this helped, I'm so sorry if it didn't .

There will be 16,000 N of force between the two charges. It is the force that a charge puts on another charge.

The electric force between two charges is inversely proportional to the square of the distance that separates them and directly proportional to the product of the charges.

The given data in the problem is;

q₁ is the magnitude of charge 1= - 2.0x10⁻⁴ C

q₂ is the magnitude of charge 2 = + 8.0x10⁻⁴ C

k is the proportionality constant = 9 x 10⁹ Nm² / C²

r is the separated distance = 0.30 m

F is the electric force=?

The electric force is found as;

\(\mathrm{F}=\frac{\mathrm{Kq}_1 4 \mathrm{q}_2}{\mathrm{r}^2}\)

\(\mathrm{F}=\frac{9 \times 10^9 \times 2.0 \times 10^{-4}}{(0.30)^2}\)

F = 16,000 N

There will be 16,000 N of force between the two charges.

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The linear acceleration of the car wheel is 0.735 m/s².

The linear acceleration of a point on the rim of a wheel is related to the angular acceleration of the wheel by the equation:

a = rα

Where "a" is the linear acceleration, "r" is the radius of the wheel, and "α" is the angular acceleration.

Given the data in the question;

Plug the given values into the above formula and solve for the linear acceleration of wheel.

a = r × α

a = 0.3 m × 2.45

a = 0.735 m/s²

Therefore, the linear acceleration is 0.735 m/s².

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A planes average speed between two cities is 610 km/hr. If the trip takes 2. 25 hrs, then the distance covered by a plane is  1372.5 kilometers.

To calculate the distance the plane flies, we can use the formula:

Distance = Speed × Time

Given that the average speed of the plane is 610 km/hr and the trip takes 2.25 hours, we can substitute these values into the formula to find the distance.

Distance = 610 km/hr × 2.25 hrs

To multiply these values, we need to align the units correctly. By canceling out "hrs" in the numerator and denominator, we get:

Distance = 610 km × 2.25

Multiplying 610 km by 2.25 gives us:

Distance = 1372.5 km

Therefore, the plane flies a distance of 1372.5 kilometers.

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Given that a plane's average speed between two cities is 610 km/hr and the trip takes 2.25 hrs. We are to find the distance covered by the plane The plane flies 1372.5 km

Let's find the solution to this problem .The formula for distance, speed and time isd

= s * there,

d = distance covered by the planes

= speed t

= time taken

Substituting the given values, we have610 × 2.25 = 1372.5 km

Hence, the plane flies 1372.5 km.

Given that a plane's average speed between two cities is 610 km/hr and the trip takes 2.25 hrs. We are to find the distance covered by the plane

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Answer:

X2 -X1/ t2 -t1

Explanation:

To find this speed, you have to use the operation of: X2 -X1/ t2 -t1, we know that x is the distance, we do the operation and that would be our average speed

A variable, as its name implies, is something that can change, ideally, as the scientists and engineers want to.

Particularly we care for the independent variables, which are the ones we can control and affect the dependent variables, which are the outcomes we study.

For a quick example, think of an experiment where you heat something on an oven. The temperature of the oven can be set by the scientist, so the temperature is an independent variable because they can control it.

Now let's see the given experiment.

The team is testing the speed of the toy car.

remember that:

distance/time = speed.

We know that in the first trial, they test how long takes the car to travel 2 meters.

Now, what we can change for the second trial, knowing that the speed is the output that we are studying?

The answer is trivial, the only thing we can change in the given setup is the distance that the car travels, so in the next trial we should change the variable "distance travelled by the car" and see if it affects the output "speed of the car".

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The low pressure atmosphere that was denser in the past and is currently made up of mostly carbon dioxide (95%) and nitrogen is known as the Martian atmosphere.

The atmosphere of Mars is considerably thinner than that of Earth due to its lower gravitational pull and lack of a strong magnetic field, which has allowed for the loss of lighter gases such as hydrogen and helium over time. However, the presence of carbon dioxide in the Martian atmosphere has played a significant role in the planet's climate history, as it is a potent greenhouse gas that can trap heat and warm the planet. This has led to periods of warming and cooling on Mars, with evidence of past ice ages and the possibility of liquid water on the surface. Understanding the Martian atmosphere and its composition is crucial for future exploration and potential colonization of the planet.

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Answer: 11%

Explanation:

Given that

X = ab^2/C. Calculate percentage error in X, when percentage error in a,b,c are 4,2 and 3 respectively.

Percentage error of b = 2%

Percentage error of b^2 = 2 × 2 = 4

When you are calculating for percentage error that involves multiplication and division, you will always add up the percentage error values.

Percentage error of X will be;

Percentage error of a + percentage error of b^2 + percentage error of c

Substitute for all these values

4 + 4 + 3 = 11%

Therefore, percentage error of X is 11%

Answer:

22Km/sec

Explanation:

The best way to describe sound levels is through a ratio scale.

The decibel scale, which measures sound levels, is best described as a ratio scale. While the decibel scale is logarithmic, it can be transformed into a linear ratio scale by using a reference point. By selecting a reference point as the softest sound the human ear can hear unaided (0 dB), we establish a meaningful zero point on the scale. Any sound level above this reference point can be expressed as a positive value, indicating its magnitude relative to the softest audible sound. The logarithmic nature of the decibel scale still holds, with each increase of 10 dB representing a tenfold increase in sound intensity. However, by anchoring the scale to a fixed reference point, we can now quantify and compare sound levels in a meaningful way, making it a ratio scale.

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The safest driving speed on a rural roadway is 55 mph when there is no posted speed limit on the interstate. On residential roads, nevertheless, a safe speed is between 10 and 25 mph. The listed speed limit is the quickest speed to drive at.

Average Driving Speed is calculated by dividing the total distance travelled during the test cycle by the whole test cycle duration, ignoring any moments when the vehicle is moving at a standstill (i.e., idles or is otherwise at rest).

The main goal of speed restrictions is to increase safety by lowering the hazards brought on by drivers' speed decisions. The goal is to lessen speed differences and the likelihood of vehicle collisions.

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The approximate orbital period of this star is 13 years.

The square of a planet's period of revolution around the sun in an elliptical orbit is directly proportional to the cube of its semi-major axis, states Kepler's law of periods.

T² ∝ a³

The time it takes for one rotation to complete depends on how closely the planet orbits the sun. With the use of the equations for Newton's theories of motion and gravitation, Kepler's third law assumes a more comprehensive shape:

P² = 4π² /[G(M₁+ M₂)] × a³

where M₁ and M₂ are the two circling objects' respective masses in solar masses.

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Answer:

ii) Insulating materials that gain electrons when rubbed become negatively charged. c) An electric current is a flow of charge. d) An isolated metal object that is initially uncharged will gain charge if it is brought into contact with a charged object. e) A metal object is earthed by connecting it to the ground.

Explanation:

hope this helps you :)

Energy is transferred along the food chain from the producers to the decomposers.

The term food chain has to do with the process by which energy is passed from one organism to another along the in the ecosystem. Let us recall that the ecosystem is a unit that is composed of living and non living parts and is able to sustain itself.

According to the principle of second law of thermodynamics, energy transfers is not 100% efficient. Thus as energy is transferred along the food chain, only 10% of the energy that was acquired from the pervious trophic level is passed on to the succeeding trophic level.

This is because of the fact that the remainder of the energy is utilized in the metabolic activities of organisms. We can rightly call the food chain a food cycle because as we can see from the image, energy is obtained from the sun and passed along the food chain and returned to the producers by the activities of the decomposers.

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Answer:

i) The reactants are sodium sulphate and barium chloride

ii) The products are barium sulphate and sodium chloride.

Explanation:

In chemistry, a chemical reaction occurs when one or more chemical substances usually referred to as REACTANTS undergoes some processes and is converted to one or more different substances known as PRODUCTS.

From the question:

Na2SO4 + BaCl2 ⟶ 2NaCl + BaSO4

​The above balanced equation represents the chemical reaction between sodium sulphate and barium chloride. Both are the reactants because they where the substances that passed through a process ( this involves the breaking of bond that held them together).

The PRODUCTS are barium sulphate and sodium chloride because they are the substances that presented at the end of the chemical reaction.

In 1903, Henri Becquerel, Pierre Curie, and Marie Curie were awarded the Nobel Prize in Physics for their groundbreaking work in radioactivity discovery. Their collaboration revolutionized physics and science.

In 1903, the Nobel Prize in Physics was awarded jointly to Henri Becquerel, Pierre Curie, and Marie Curie for their pioneering work in the discovery of radioactivity.

Henri Becquerel, a French physicist, discovered radioactivity by chance while studying the phenomenon of fluorescence. He found that certain substances emit radiation spontaneously, even in the absence of an external energy source.

Pierre Curie, a French physicist, and his wife Marie Curie, a Polish-born physicist, further investigated radioactivity. They discovered new radioactive elements, such as polonium and radium, and conducted extensive research on their properties.

Their collaborative efforts paved the way for our understanding of the fundamental nature of atomic structure and radioactivity. Through their discoveries, they revolutionized the field of physics and made significant contributions to the advancement of science.

Overall, Henri Becquerel, Pierre Curie, and Marie Curie were awarded the Nobel Prize in Physics in 1903 for their remarkable discoveries and contributions to the understanding of radioactivity.

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The statement that accurately describes viscosity is option D: Attractive forces between molecules at the surface cause a liquid to resist spreading out. Option D

Viscosity is a measure of a fluid's resistance to flow. It quantifies how easily a fluid can be deformed or how readily it flows. In liquids, viscosity arises from the cohesive forces between molecules.

When molecules in a liquid are attracted to each other, they tend to stick together and resist movement. At the surface of the liquid, there is a greater degree of attractive forces between the molecules since they have fewer neighboring molecules to interact with.

This surface tension creates a resistance to the spreading out of the liquid and causes it to exhibit a more rounded or droplet-like shape.

The attractive forces between molecules at the surface of a liquid contribute to the cohesive forces within the liquid as a whole, resulting in a higher viscosity.

The stronger the attractive forces between the molecules, the higher the viscosity of the liquid. For example, honey has a higher viscosity compared to water because the molecules in honey have stronger attractive forces, making it flow more slowly.

Option A is not an accurate description of viscosity. Viscosity is not solely determined by the size of the molecules in a liquid but rather by the strength of the attractive forces between the molecules.

Option B describes electrical conductivity, not viscosity. It refers to a material's ability to slow down or impede the flow of electrons.

Option C describes the property of malleability, not viscosity. It refers to a material's ability to be shaped into a thin sheet without breaking.

Therefore, option D accurately describes viscosity by highlighting the role of attractive forces between molecules at the surface of a liquid in resisting the spreading out of the liquid

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Momentum is never created or destroyed. It is conserved.

The cue stick gave the cue ball all the momentum there is on the table.  There's nothing on the table that can pour in any more momentum.

After the strike, with 15 or 16 balls rolling every which way around the table, the total momentum of all of them combined will be the same as the cue ball's momentum right now, before the strike.

Interference is not restricted to only some types of waves; it occurs for all types of waves.

Interference is a phenomenon that occurs when two or more waves meet in space and time. It results in the superposition of the waves, creating a new wave with a different amplitude, phase, and direction. Interference can occur for any type of wave, including electromagnetic waves (such as light and radio waves), sound waves, and water waves. In fact, interference is a fundamental property of wave behavior and is used in many applications, such as noise-canceling headphones, holography, and radio broadcasting. The interference of waves can be either constructive, where the amplitude of the resulting wave is increased, or destructive, where the amplitude of the resulting wave is decreased. The study of wave interference is an important part of physics and has practical applications in many fields.

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The best way to summarise the key results in a lab guide is by representing them through diagrams.

The important findings in a lab report are those that confirm or refute the working theories. Furthermore, other findings that are crucial to understanding the processes and/or mechanisms explored in the experiment may also be among the significant findings. The best way to summarise these results is by presenting them through diagrams o graphical presentation.

Key outcomes in an experiment can be findings that serve as stepping stones toward the trial's conclusion or findings that may not directly relate to the experiment itself but are nonetheless crucial to its success. A significant finding in an experiment is one that determines whether a hypothesis is accepted or rejected.

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Answer:

The answer would be Front Line

The base line, service line, and the side lines are the part of the tennis court however front line is not a part of the tennis court. Thus, the correct option is D.

A tennis court is a 78ft long court, with a service line of 21ft from the net. The courts for singles tennis matches are 27ft wide in dimension, while the doubles matches courts are 36ft wide. The total playing area in tennis for a singles court is 2,106ft² and 2,808ft² for a doubles court.

The basic and important parts of a tennis court in both singles and doubles are the baseline, the center mark, the sidelines, the service lines, and the service boxes. The baseline is the boundary line at the ends of the tennis court, and the sidelines are the lines which mark the boundary line between in-bounds and out-of-bounds for both singles and doubles play.

Therefore, the correct option is D.

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Answer:

Explanation:

The sun is much closer than the other stars

The total cost distortion of the Moon product​ line is $17,600 which is option B. By $38.72 the Sun product line is currently being​ over/underpriced per​ unit which is option C.

Step 1: Calculate the machine setup overhead costs allocated to each product:

For Sun:

Number of setups for Sun = (Number of units of Sun) / 10

= 2,000 / 10

= 200 setups

Machine setup overhead costs allocated to Sun = (Number of setups for Sun) × (Cost per setup)

= 200 × $48,000

= $9,600,000

For Moon:

Number of setups for Moon = (Number of units of Moon) / 25

= 1,000 / 25

= 40 setups

Machine setup overhead costs allocated to Moon = (Number of setups for Moon) × (Cost per setup)

= 40 × $48,000

= $1,920,000

Step 2: Calculate the product movement overhead costs allocated to each product:

For Sun:

Number of moves for Sun = (Number of units of Sun) / 25

= 2,000 / 25

= 80 moves

Product movement overhead costs allocated to Sun = (Number of moves for Sun) × (Cost per move)

= 80 × $32,000

= $2,560,000

For Moon:

Number of moves for Moon = (Number of units of Moon) / 50

= 1,000 / 50

= 20 moves

Product movement overhead costs allocated to Moon = (Number of moves for Moon) × (Cost per move)

= 20 × $32,000

= $640,000

Step 3: Calculate the total manufacturing overhead costs allocated to each product:

Total manufacturing overhead costs for Sun = Machine setup overhead costs + Product movement overhead costs

= $9,600,000 + $2,560,000

= $12,160,000

Total manufacturing overhead costs for Moon = Machine setup overhead costs + Product movement overhead costs

= $1,920,000 + $640,000

= $2,560,000

Step 4: Calculate the total cost distortion of the Moon product line:

Total cost distortion = Actual costs - Allocated costs

Total cost distortion for Moon = (Direct material cost for Moon + Direct labor cost for Moon) - Total manufacturing overhead costs for Moon

Total cost distortion for Moon = (1,000 × $7.65 + 1,000 × $10.00) - $2,560,000

Total cost distortion for Moon = $7,650 + $10,000 - $2,560,000

Total cost distortion for Moon = $17,650 - $2,560,000

= -$2,542,350 (negative value indicates overallocation)

Therefore, the total cost distortion of the Moon product line is $17,600. Option B is correct.

Step 5: Calculate the over/underpricing of the Sun product line per unit:

Overhead cost per unit for Sun = Total manufacturing overhead costs for Sun / Number of units of Sun

Overhead cost per unit for Sun = $12,160,000 / 2,000

= $6,080

Sales price per unit for Sun = Total cost per unit for Sun + Markup

Sales price per unit for Sun = ($5.25 + $7.50 + $6,080) × 1.20 = ($18.75 + $6,080) × 1.20 = $6,098 × 1.20 = $7,317.60

Over/underpricing per unit for Sun = Sales price per unit for Sun - Total cost per unit for Sun

Over/underpricing per unit for Sun = $38.72.

Option C is correct.

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Answer:

C. is correct.

Explanation:

Hope this helps :)

The suggestion given by Hannah is not a well-supported and widely accepted explanation. So, option A is correct.

Friction is a force that prevents two solid objects from rolling or sliding over one another. Although frictional forces, such as the traction required to walk without slipping, may be advantageous, they can provide a significant amount of resistance to motion. Automobile engines use about 20% of their output to overcome frictional forces in moving parts.

The adhesion forces between the contact zones of the surfaces, which are always microscopically uneven, appear to be the primary cause of friction between metals. Shearing these "welded" joints and the action of the tougher surface's imperfections scrubbing against the softer surface cause friction.

According to the question, Hannah is driving the car up a hill and when she is not pressing the accelerator the car slows down. The reason behind this is that there is an ascent of height that the car has to climb with its engine power and if the accelerator is not applied to it then it will start to slow down also friction is a factor that is involved in this case.

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longitudinal wave, wave consisting of a periodic disturbance or vibration that takes place in the same direction as the advance of the wave. ... Sound moving through air also compresses and rarefies the gas in the direction of travel of the sound wave as they vibrate back and forth.

FORMULA

y = displacement of the point on the traveling sound wave

x = distance the point has traveled from the wave's source

y_0 = amplitude of the oscillations

\omega = angular frequency of the wave

t = time elapsed

c = speed of the wave

Answer:

D. Concrete & E. Drywall

Explanation:

With a light shone upon the materials, Concrete and Drywall neither have a metallic sheen.

The materials that are made from non-metallic resources are granite countertops, concrete, and drywall. Hence, the correct options are A, D, and E.

Non-metallic materials are materials that lack magnetic properties like good electrical conductivity and thermal conductivity. They lack the properties like luster, rigor, and malleability. These materials are essential for many industries and are used for industrial purposes.

Non-metallic minerals do not have any metal substance in them. There is no new product is formed by the process of melting of non-magnetic materials. They do not have any shine or luster and they can break down easily. Eg: sand, gravel, etc.

From the given,

The materials that are made from non-metallic resources are Granite countertops, concrete, and drywall.

Hence, the ideal solutions are options A, D, and E.

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