From shortest to longest wavelength, which of the following correctly orders the different categories of electromagnetic radiation?
A.gamma rays, X rays, ultraviolet, visible light, infrared, radio
B. infrared, visible light, ultraviolet, X rays, gamma rays, radio
C. gamma rays, X rays, visible light, ultraviolet, infrared, radio
D. radio, infrared, visible light, ultraviolet, X rays, gamma rays

78% of the houses in Elizabeth's town were for sale last summer.

To find the percentage of houses that were for sale last summer in Elizabeth's town, we need to divide the number of houses for sale by the total number of houses and then multiply by 100.

The total number of houses in Elizabeth's town is given as 9,000. Last summer, 7,020 houses were for sale. To calculate the percentage, we divide 7,020 by 9,000:

Percentage = (7,020 / 9,000) * 100

Simplifying the calculation:

Percentage = 0.780 * 100

Percentage = 78.0%

To explain further, we take the number of houses for sale (7,020) and divide it by the total number of houses (9,000) to get the ratio of houses for sale to the total. Multiplying this ratio by 100 gives us the percentage. In this case, 78.0% indicates that a significant portion of the houses in Elizabeth's town were available for sale during the summer.

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Answer:

Ingenstion

Explanation:

The most common tapeworms that infect cats worldwide are Dipylidium caninum and Taenia taeniaeformis. Dipylidium caninum is transmitted to cats by fleas. The immature fleas larvae ingest the eggs of the worm, but infection is then passed on to a cat when it swallows an infected flea during grooming.

Answer:

The most common worms that housecats get are tapeworms. The housecats always lick their fur to clean them. The tapeworms love where it is damp. After the housecats clean their fur, they will play in the house sometimes they will roll on the floor. Then they get tapeworm eggs, after the eggs hatch the tapeworm will live on the fur of the cats.

Explanation:

Answer:

256 ohms

Explanation:

Applying,

R = R'[1+α(T-T')]............. Equation 1

Where R = Final resistance of the wire, R' = Initial resistance of the wire, T = Final temperature, T' = Initial temperature, α = Temperature coefficient of resistance

From the question,

Given: R' = 200 ohms, T = 90 degrees, T' = 20 degrees, α = 0.004/degree

Substitute these values into equation 1

R = 200[1+0.004(90-20)]

R = 200[1+0.28]

R = 200(1.28)

R = 256 ohms

The resistance of the wire at 90 °C correct to the nearest ohm assuming the coefficient of resistance is 0.004 °C¯¹ is 256 ohm

α = R₂ – R₁ / R₁(T₂ – T₁)

0.004 = R₂ – 200 / 200(90 – 20)

0.004 = R₂ – 200 / 200(70)

0.004 = R₂ – 200 / 14000

Cross multiply

R₂ – 200 = 0.004 × 14000

R₂ – 200 = 56

Collect like terms

R₂ = 56 + 200

R₂ = 256 ohm

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Answer:

True

Explanation:

Assuming no wind resistance, there will be no horizontal acceleration, because there will be no forces acting on it.

Answer:

Magnetism is the force exerted by magnets when they attract or repel each other

hope it helps you:)

Answer:

it is double the temperature change of iron

Answer:

C

Explanation:

Gravity is the main reason that make our planets to pull each other

Answer:

45kw45_32+675&453try to get it done

Answer:

A: 9 kg

Explanation:

on edge! hope this helps!!~ ∩(︶▽︶)∩

Four are known: s, p, d, and f.

Thank you,

Eddie

The steady force required of each rocket is 27,875 N.

The steady force required by each rocket along the circular path is calculated as follows;

F = ma

where;

The centripetal acceleration of each rocket is calculated as follows;

a = ω²r

where;

ω = 46 rpm = 46 rev/min x 2π rad/rev x 1 min/60s = 4.82 rad/s

t = 7 min = 7 x 60 s = 420 s

a = ω²r

a = (4.82²) x 4.8 m

a = 111.5 m/s²

The steady force is calculated as follows;

F = ma

F = 250 x 111.5

F = 27,875 N

Thus, the steady force required of each rocket is determined by applying the concept of centripetal force.

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Pressure builds under the surface of Earth, causing mountains to form.The correct answer is option D.

Uplift refers to the geological process that elevates the Earth's surface, resulting in the formation of mountains. This process is primarily driven by tectonic forces, including the movement and collision of Earth's lithospheric plates.

When two plates converge, immense pressure builds up beneath the surface, causing the crust to buckle and fold. This deformation leads to the formation of mountains, as rocks are pushed upward and displaced vertically.

As the uplift process continues over millions of years, mountains gradually take shape. Erosion and weathering play significant roles in shaping their features, but it is the initial uplift that initiates the formation of mountains.

As the Earth's surface is elevated, a wide range of landforms can emerge, including rugged peaks, deep valleys, and steep slopes.

Uplift has a profound impact on the Earth's surface and ecosystems. Mountains alter local climates, influencing precipitation patterns and creating variations in temperature and wind patterns.

Therefore, uplift plays a crucial role in shaping the Earth's surface and influencing various geological, biological, and climatic processes.

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Answer:

By using work energy theorem

Intake energy = work out

Intake energy = (number of lifting barbell) x (work done per lifting)

Ei = n x W

Ei = nW

Now

Work per lifting = Force x displacement

W = (mg) x (displacement)

W = (50 x 9.8) x (2)

W = 980 J

Now

Ei = n x W (Ei = 2000 Cal = 2 kilocalory = 8368 Joule)

8368 = n x 980

n = 8.53

Aprrox 8 times he should raise barbell to expend 2000 calory.

Explanation:

Given:

Height = 25 m

Distance from the edge to where it lands = 27 m.

Let's find the final horizontal velocity of the tennis ball.

To find the final horizontal velocity of a projectile motion, apply the formula:

The initial horizontal velocity and the final horizontal velocity are the same since there is no force acting on the object.

Now, to find the horizontal velocity, let's first make a free sketch of this situation:

Let's find the time of flight:

Where:

h = 25 m

g is acceleration due to gravity = 9.8 m/s²

Thus, we have:

The time of flight if the projectile is 2.26 seconds.

Now, to find the final horizontal velocity, we have:

Where:

x is the horizontal distance = 27 m

Thus, we have:

Therefore, the final horizontal velocity is 11.96 m/s.

ANSWER:

11.96 m/s

Answer:

j120

Explanation:

qll energy for residential is 120 and that's what ruffly is always used for wiring

Answer:

A. Drawings are no longer used because photography is more precise.

Explanation:

It is common practice for investigators to make a sketch of a crime scene.

Creating sketches of crime scenes is a common practice among investigators, as it provides valuable visual documentation that complements photographs and written notes. While photography is an important tool for capturing detailed and precise information, sketches offer unique advantages that contribute to the overall understanding of the crime scene.

Sketches can provide a clear and organized representation of the spatial relationships, distances, and dimensions within the crime scene. They can accurately depict the layout of the area, the position of evidence, the location of key objects, and other relevant details that may not be fully captured by photographs alone.

Additionally, sketches allow investigators to emphasize specific features or elements that are essential to the case. This can aid in explaining the sequence of events, the movement of individuals or objects, and other dynamic aspects of the crime scene.

While digital photography is widely used today, sketches remain valuable for scenarios where a camera may not immediately be available, when capturing certain angles or perspectives is challenging, or when highlighting specific details is necessary.

Investigators are trained in creating accurate and detailed sketches that adhere to professional standards. This includes ensuring accurate measurements, using appropriate scale ratios, labeling key features, and maintaining object proportions. Sketched crime scene diagrams are often included in official investigative reports and court proceedings to provide a comprehensive visual representation of the crime scene, enhancing the communication of information among investigators, legal professionals, and jurors.

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The elevator accelerates upward at an acceleration, then the magnitude of the force is 148.84 N.

The force is the action of push or pull which makes an object to move or stop.

Given the mass of child m =13.9 kg, acceleration a =0.898 m/s², then the force will be given by

F = m(g-a)

F = 13.9 x (9.81 - (-0.898))

F = 148.84 N

Thus, the magnitude of the force is  148.84 N.

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Answer:

i dont know

Explanation:

i dont know

The diameter of the smaller end of the pipe is approximately 0.78 meters.

To determine the diameter of the smaller end of the pipe, we can use the principle of conservation of mass. According to this principle, the mass flow rate of water should remain constant throughout the pipe.

The mass flow rate is given by the equation:
Mass flow rate = density of water * cross-sectional area * velocity

Since the density of the water remains constant, we can write:
Cross-sectional area1 * velocity1 = Cross-sectional area2 * velocity2

Given that the velocity1 is 13 m/s, the diameter1 is 1.2 m, and the velocity2 is 30 m/s, we can solve for the diameter2 using the equation:
(pi * (diameter1/2)^2) * velocity1 = (pi * (diameter2/2)^2) * velocity2

Simplifying the equation:
(1.2/2)^2 * 13 = (diameter2/2)^2 * 30

Calculating the equation:
(0.6)^2 * 13 = (diameter2/2)^2 * 30

0.36 * 13 = (diameter2/2)^2 * 30

4.68 = (diameter2/2)^2 * 30

Dividing both sides by 30:
0.156 = (diameter2/2)^2

Taking the square root of both sides:
0.39 = diameter2/2

Multiplying both sides by 2:
0.78 = diameter2

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Answer:

Add items to the box

Explanation: I did the test

Answer:

Add some Items to it.

Explanation:

Answer:

Disambiguation

Explanation:

Fg is an abbreviation used in physics to describe the amount of force exerted by gravity on an object, normally represented in units such as the newton.

Answer:Gravitational forces

Explanation:Is used in physics, used when asked to calculate the the force attracted to the nucleus

So the entire heating process from start to all the water boiled away can be broken down into two steps.

Step 1: heating the water from 30C to 100C.

Let's use this formula

Q1 = (mcΔT)w + (mcΔT)Al

Since ΔT is the same for aluminum and water in this step (they're both increasing from 30 to 100), we can factor ΔT out.

Q1 = ((mc)w + (mc)Al)*ΔT

Where,

Q1: heat required to heat the system from 30 to 100

(mc)w: mass (m), heat constant (c), and temperature change (ΔT) for water

(mc)Al: mass (m), heat constant (c), and temperature change (ΔT) for aluminum

ΔT: temperature change

For water:

m = 2.2 kg

c = 4186 J/kgC (this is a constant specific to water, you need to look this up in a reference table)

For aluminum:

m = 0.75 kg

c = 900 J/kgC (this is the heat constant for aluminum)

ΔT = 100-30 = 70 C

Now let's plug in the variables we know:

Q1 = (2.2*4186 + 0.75*900)*70 = 691894 J

Step 2: heating the boiling water enough to vaporize it all

Let's use this formula:

Q2 = (mVap)*(LVap)

Where,

Q2: heat required to boil all the water away

mVap: mass of the system after the water boils away, so just the mass of the empty pot

LVap: latent heat of vaporization of water (this is a constant for water that you need to look up)

mVap = 0.75 kg

LVap = 2256000 J/kg

Now let's plug in the variables we know:

Q2 = 0.75*2256000 = 1692000 J

So now that we have the heat required for both steps, we can simply add those to get the total heat required.

QTotal = Q1 + Q2 = 691894 + 1692000

QTotal = 2383894 J

^Answer for part A

Power is the rate at which heat is transferred. 550W = 550J/s.

At 550 J/s, we can find how long it takes for 2383894 J to transfer.

P = Q/t

Where,

P: power, Q: total heat, t: time required (in seconds)

550 = 2383894/t

t = 2383894/550

t = 4334.35 s = 72.24 min

^Answer for part B

Answer:

A. The reactions taking place in a cold pack

Explanation:

This is because in a cold pack, there is no heat gained therefore a reaction stands by losing it's own heat to the surrounding.

\(.\)

The thrust force that is acting on the rocket engine is obtained as  5782 kN.

We know that the thrust is the force that is acting on an object that enables the object to be able to move higher. The thrust force can be applied to a rocket such that the rocket can be able to move higher and then pass through the air.

This implies that the thrust force is about the most important force when we want to be able to launch a rocket or when we are trying to move an aeronautical engine. In this case, we are asked to be able to obtain the thrust force as we can see from the parameters that have been given.

We now know that the thrust force can be obtained as; 118kg * 9.8 m/s^2 * 5000m/s = 5782 kN

There would be a thrust of  5782 kN working on the engine.

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The given magnitude of the two charges are 6μc and they exert a force of 0.7N on each other. We need to find the distance of separation between the particles.

By Coloumb's Law :-

\(\sf\longrightarrow F =\dfrac{1}{4\pi\epsilon_0} \dfrac{q_1q_2}{r^2} \)

where

Substitute the respective values,

\(\sf\longrightarrow \) 0.7 = {(9*10⁹) (6*6) (10-⁶ *10-⁶) }/ r²

\(\sf\longrightarrow \) r² = (36*9 * 10-³)/0.7

\(\sf\longrightarrow \) r =√{ 36*9*10-³)/√7 m

\(\sf\longrightarrow \) r = 6* 3* 10-¹ /√70 m

\(\sf\longrightarrow \) r = 0.21 m

And we are done!

A 66.1-kg boy is surfing and catches a wave which gives him an initial speed of 1.60 m/s. He then drops through a height of 1.59 m, and ends with a speed of 8.51 m/s. The nonconservative work done on the boy is approximately -42.7 kilojoules.

To find the nonconservative work done on the boy, we need to consider the change in the boy's mechanical energy during the process. Mechanical energy is the sum of the boy's kinetic energy (KE) and gravitational potential energy (PE).

The initial mechanical energy of the boy is given by the sum of his kinetic energy and potential energy when he catches the wave:

E_initial = KE_initial + PE_initial

The final mechanical energy of the boy is given by the sum of his kinetic energy and potential energy after he drops through the height:

E_final = KE_final + PE_final

The nonconservative work done on the boy is equal to the change in mechanical energy:

Work_nonconservative = E_final - E_initial

Let's calculate each term:

KE_initial = (1/2) * m * v_initial^2

= (1/2) * 66.1 kg * (1.60 m/s)^2

PE_initial = m * g * h_initial

= 66.1 kg * 9.8 m/s^2 * 1.59 m

KE_final = (1/2) * m * v_final^2

= (1/2) * 66.1 kg * (8.51 m/s)^2

PE_final = m * g * h_final

= 66.1 kg * 9.8 m/s^2 * 0

Since the boy ends at ground level, the final potential energy is zero.

Substituting the values into the equation for nonconservative work:

Work_nonconservative = (KE_final + PE_final) - (KE_initial + PE_initial)

Simplifying:

Work_nonconservative = KE_final - KE_initial - PE_initial

Calculating the values:

KE_initial = (1/2) * 66.1 kg * (1.60 m/s)^2

PE_initial = 66.1 kg * 9.8 m/s^2 * 1.59 m

KE_final = (1/2) * 66.1 kg * (8.51 m/s)^2

Substituting the values:

Work_nonconservative = [(1/2) * 66.1 kg * (8.51 m/s)^2] - [(1/2) * 66.1 kg * (1.60 m/s)^2 - 66.1 kg * 9.8 m/s^2 * 1.59 m]

Calculating the result:

Work_nonconservative ≈ -42.7 kJ

Therefore, the nonconservative work done on the boy is approximately -42.7 kilojoules. The negative sign indicates that work is done on the boy, meaning that energy is transferred away from the boy during the process.

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Answer:

hope this answer helps this is what I understand

Answer:

In the southern hemisphere it is fall but almost winter

Explanation:

They are 6 months ahead of the northern hemisphere. at least thats

how I think about it

use,

F = mg

For feather,

F = 0.1*9.8

F = 0.98N

For bowling bowl,

F = 4.5*9.8

F = 44.1N

Therefore the forces for the feather and the bowling bowl are 0.98N and 44.1N respectively.

The amount of force each item has is 0.98 Newton and 44.1 Newton respectively.

Given the following data:

To find how much force each item have if it is falling due to the acceleration of gravity, we would apply Newton's Second Law of Motion:

Mathematically, Newton's Second Law of Motion is given by this formula;

\(Force = mass\) × \(acceleration\)

Substituting the given parameters into the formula, we have;

For the feather:

\(Force = 0.1\) × \(9.8\)

Force = 0.98 Newton

For the bowling ball:

\(Force = 4.5\) × \(9.8\)

Force = 44.1 Newton

Therefore, the amount of force each item has is 0.98 Newton and 44.1 Newton respectively.

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Answer:

resistor R₂ has the lowest current density

Explanation:

The current density is

          j = I / A

now let's analyze each case

a) R₂ has an area 2A₀ and a length L₀ that R₁

b) R₃ has an area Ao and a length 3L₀ what R₁

we can see that all the area is given in relation to the resistance R₁

the current density in R₁ is

         j₁ = I / A₀

the current density in R₂

         j₂ = I / 2A₀

         j₂ 2 = ½ I/A₀

the current density in R₃

         j₃ = I / A₀

         j₂ < j₁ = j₃

therefore resistor R₂ has the lowest current density