There are two types of waves: mechanical and electromagnetic. Microwaves, infrared waves, and radio waves are examples of electromagnetic waves. Which claim is true about the speed of an electromagnetic wave?.

When you change the thickness of the wire in a circuit, option B. the resistance (R) and current (I) will also change, but the voltage (V) will remain constant.

The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area (thickness). As the thickness of the wire changes, the cross-sectional area changes, which in turn affects the resistance. Thicker wires have a larger cross-sectional area, resulting in lower resistance, while thinner wires have a smaller cross-sectional area, resulting in higher resistance. Therefore, changing the thickness of the wire will cause a change in resistance.

According to Ohm's Law (V = IR), the voltage (V) in a circuit is equal to the product of the current (I) and the resistance (R). If the voltage is kept constant, and the resistance changes due to the thickness of the wire, the current will also change to maintain the relationship defined by Ohm's Law. When the resistance increases, the current decreases, and vice versa.

However, it's important to note that changing the thickness of the wire will not directly affect the voltage. The voltage in a circuit is determined by the power source or the potential difference applied across the circuit and is independent of the wire thickness. As long as the voltage source remains constant, the voltage across the circuit will remain constant regardless of the wire thickness. Therefore, the correct answer is option B.

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The energy transferred from the water in a cup when the temperature falls by 8°C is 672 joules (J).

What is Mass?

Mass is a conserved quantity, meaning that the total mass of a closed system remains constant, even if energy or momentum is exchanged between its components. Mass is also a property that gives rise to the force of gravity, which attracts objects with mass towards each other.

To calculate the energy transferred from the water in a cup when the temperature falls by 8°C, we can use the formula:

Q = mcΔT

Where Q is the energy transferred, m is the mass of water, c is the specific heat capacity of water, and ΔT is the change in temperature.

Given that the mass of water in each cup is 200 g and the specific heat capacity of water is 4200 J/kg°C, we can calculate the energy transferred as follows:

m = 200 g = 0.2 kg

c = 4200 J/kg°C

ΔT = -8°C (negative because the temperature has fallen)

Q = mcΔT

= 0.2 kg × 4200 J/kg°C × (-8°C)

= -672 J

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Answer:

calla gringo de mierda

Explanation:

Answer:

the density is 2

Explanation:

p= m/v

p is density

m is mass

v is volume

6/3 = 2

The size of the difference threshold being greater for heavier objects than for lighter ones illustrates Weber’s Law.

Weber's law is a principle in psychophysics that describes the relationship between the actual change in stimulus and the change in a subjective sensation of that stimulus. Weber's law states that the ratio of the difference threshold to the initial stimulus magnitude is constant across all levels of the initial stimulus magnitude, whether the stimulus is light, sound, or some other sensory input.

For instance, assume that you're sitting in a room with the lights turned off. Your companion turns on a flashlight, and you're suddenly able to see the objects in the room. If the flashlight's brightness is increased by 10%, you can detect the difference. But if the flashlight's brightness is increased by 10% from a brighter initial level, you might not notice the difference.

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To complete the assignment, click the links to open the resources provided. These resources will provide guidance on how to create a lab report and how it will be graded.

Resources are the materials, both physical and intellectual, that are used to produce goods and services. Physical resources include land, natural resources, capital goods, human resources and technological resources. Intellectual resources refer to knowledge or skills that are used in the production process, such as patents, copyrights, inventions, brands and trade secrets.

Once you have created the lab report file(s) and are ready to upload them, click the Add Files button and select each file from your desktop or network folder. Upload each file separately.

Once all the files have been uploaded, click Submit to submit your work to your teacher.

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Answer:

47.43 m/s

Explanation:

Given that,

Final speed of a plane, v = 0

Distance, d = 180 m

Acceleration of the plane, a = -6.25 m/s² (deceleration )

We need to find the plane's velocity. Let it was u. So, using the third equation of kinematics as :

\(v^2-u^2=2ad\\\\u^2=0^2-2\times (-6.25)\times 180\\\\u=\sqrt{2250} \\\\u=15\sqrt{10}\ m/s\\ \\\text{or}\\\\u=47.43\ m/s\)

So, the plane's velocity when it first touched the landing strip is 47.43 m/s.

OD. 2kg of liquid oxygen at -225 *C has the least thermal energy.

The thermal energy for a phase of matter is given by the formula

Q = mCΔT where

m = mass

C = Specific heat constant

T = Temperature

For Oxygen, the Specific heat constant = 0.92 J/gK

Let's calculate the thermal energy for each case, assuming that the initial temperature is 0 Kelvin

OA.

m= 5000 g

ΔT = 303 K

So Q =5000×0.92×303 = 1393800 J = 1393.8 KJ

OB.

m= 5000 g

ΔT = 48 K

So Q =5000×0.92×48 = 220800 J = 220.8 KJ

OC.

m= 2000 g

ΔT = 293 K

So Q =2000×0.92×293 = 539120 J = 539.12 KJ

OD.

m= 2000 g

ΔT = 48 K

So Q =2000×0.92×48 = 88320 J = 88.32 KJ

Therefore, OD 2kg of liquid oxygen at -225 *C has the least thermal energy which is 88.32 KJ.

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Answer:

2 kg of liquid oxygen at -225°C

Explanation:

B has the same temperature, yet it's more mass. So, to use this as an example--B has the most thermal energy. If the mass decreased, then the thermal energy would decrease. More mass=more thermal energy. Hence, why the mass decreasing to 2 kg would equal the least amount of thermal energy.

Kind of energy does a rolling rock at the cliff or falling water from a dam have is- gravitational potential energy

The water behind a hydroelectric dam stores gravitational potential energy since it is at a higher level than the water on the other side of the dam. As the water falls, this potential energy is converted into kinetic energy, which turns turbines to generate electricity.

What is  gravitational potential energy?

The potential energy that a huge item has in relation to another massive object due to gravity is known as gravitational energy or gravitational potential energy. When two objects descend toward one another, potential energy associated with the gravitational field is released.

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The magnitude of the emf induced in the coil is 0.096 volts, and the current induced in the coil, considering an effective resistance of 20 ohms, is 0.0048 amperes.

Faraday's law of electromagnetic induction states that when a magnetic field changes in intensity or when a conductor moves in a magnetic field, an electromotive force (emf) is induced in the conductor. This induced emf is proportional to the rate of change of the magnetic field or the rate at which the conductor cuts the magnetic field lines.

Now, let's calculate the values requested:

a. To calculate the magnitude of the emf induced in the coil, we can use the formula:

emf = N * A * B * sin(θ)

Where:

N = number of turns in the coil = 100 turns

A = area of each turn of the coil = 4.8 x 10^(-4) m²

B = magnetic field strength = 4 x 10^(-4) T

θ = angle between the magnetic field and the normal to the plane of the coil = 30°

Plugging in the values:

emf = 100 * 4.8 x 10^(-4) * 4 x 10^(-4) * sin(30°)

Calculating this expression will give you the magnitude of the emf induced in the coil.

b. To calculate the current induced in the coil, we can use Ohm's Law:

emf = I * R

Where:

emf = electromotive force induced in the coil (calculated in part a)

R = effective resistance of the coil = 20 ohms

Rearranging the formula:

I = emf / R

Substituting the values calculated in part a:

I = (emf calculated in part a) / 20 ohms

Calculating this expression will give you the current induced in the coil.

a. Using the formula for the magnitude of the induced emf:

emf = 100 * 4.8 x 10^(-4) * 4 x 10^(-4) * sin(30°)

emf = 100 * 4.8 x 10^(-4) * 4 x 10^(-4) * 0.5

emf = 0.096 volts

Therefore, the magnitude of the emf induced in the coil is 0.096 volts.

b. Using Ohm's Law:

I = emf / R

I = 0.096 volts / 20 ohms

I = 0.0048 amperes

So, the current induced in the coil, considering an effective resistance of 20 ohms, is 0.0048 amperes.

Hence, The magnitude of the induced emf in the coil is 0.096 volts, and the current induced in the coil is 0.0048 amperes, assuming an effective resistance of 20 ohms.

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The momentum of the bumper car after the collision is 1,040 kgm/s.

The change in momentum of the bumper is calculated as follows;

P = v(m1 + m2)

P = 8(55 + 75)

P = 1,040 kgm/s

The momentum of the bumper car after the collision is 1,040 kgm/s.

The direction is still the same.

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Answer:

a seismometer records ground movement, and a seismometer is the output.

Explanation:

a seismometer has a moving pen, that when the ground shakes, it moves the pen to create a seismograph.

To find the number of regular (statute) miles in 1 nautical mile, we need to determine the length of the arc on the surface of the earth that corresponds to 1 nautical mile.

We are given that the central angle formed at the center of the earth has a measure of 1'. We know that the circumference of a circle is given by 2πr, where r is the radius of the circle. In this case, the radius of the earth is given as 4,000 miles.To find the length of the arc corresponding to 1', we can use the formula for the circumference of a circle and convert the angle measure from minutes to radians:C = 2πr
Arc Length = C * (θ/360) (where θ is the angle measure in degrees)In this case, the angle measure is given as 1', which is equal to 1/60 degrees or (1/60) * (π/180) radians.
Arc Length = 2π * 4,000 miles * [(1/60) * (π/180)]
Simplifying the expression:Arc Length = (2 * π * 4,000 * 1 * π) / (60 * 180) miles
Arc Length = (8 * π² * 4,000) / (60 * 180) miles
Arc Length ≈ 110.6 miles
Therefore, the length of the arc on the surface of the earth that corresponds to 1 nautical mile is approximately 110.6 miles.To find the number of regular (statute) miles in 1 nautical mile, we can divide 1 nautical mile by the length of the arc:Number of regular miles in 1 nautical mile = 1 nautical mile / 110.6 miles
Number of regular miles in 1 nautical mile ≈ 0.00904 miles
Rounded to the nearest hundredth of a mile, the number of regular miles in 1 nautical mile is approximately 0.01 miles.

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Answer:

11. 6700L

12. 0.0000238

13. 1805

14. 3800

15. 1400

16. 0.01428

17. 0.0003585

18. 0.0415

19. 4060.0

20.0.105

Explanation:

M₂ = Fr²/GM₁

M₂ = [(132N)(.243m)²]/[(6.67*10^-11N*m²/kg)(1.175*10^4kg)]

M₂ = (7.79N*m²)/(7.84*10^-7N*m²)

M₂ = 9.94*10^6 kg

Acceleration is the variable that is NOT shown on a velocity-time graph

Velocity - time graph, evidently shows two variables, velocity on one axis and time on other . But as we know , that acceleration can be calculated by the formula which is

acceleration = change in velocity / time

hence , the derivative of velocity is acceleration

which mean that the slope of the Velocity - time graph shows the acceleration , which cannot be seen , but is hidden as the slope of that graph

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Answer: nuclear energy, fossil energy -- like oil, coal and natural gas -- and renewable sources like wind, solar, geothermal and hydro power

Explanation:

Energy can be in many forms like the ones I stated but the sun is probably the biggest source also and play's a big part.

The correct list that names the three types of galaxies is Elliptical, Spiral, and Irregular.

The classification of galaxies is primarily based on their shape and structure. Elliptical galaxies are characterized by their elliptical or oval shape, with a smooth and featureless appearance. Spiral galaxies have a distinct spiral arm structure, often with a central bulge. Irregular galaxies do not have a well-defined shape and exhibit a chaotic or irregular appearance. It's worth noting that there are also other specialized types of galaxies, such as lenticular galaxies (a hybrid between elliptical and spiral galaxies) and peculiar galaxies (exhibiting unusual features or interactions with other galaxies). The study of galaxies, known as galactic astronomy, continues to provide fascinating insights into the structure and evolution of the universe.

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The identity of the mystery metal is most likely lead.

The amount of heat energy required to raise the temperature of one unit of mass of a substance by one degree Celsius is established as specific heat (or one Kelvin). It is a physical property of a substance that has been usually represented by the symbol "s".

The specific heat of a substance depends on its chemical composition and structure and can vary widely between different materials.

To calculate the specific heat of the mystery metal, we can use the equation:

q = m * s * ΔT

where q is the heat absorbed or released, m is the mass of the substance, s is the specific heat of the substance, and ΔT is the change in temperature.

In this case, we can assume that the heat lost by the gold block is equal to the heat gained by the water, so we can write:

m_gold * s_gold * ΔT_gold = m_water * s_water * ΔT_water

where m_gold and s_gold are the mass and specific heat of the gold block, ΔT_gold is the change in temperature of the gold block, and s_water is the specific heat of water.

Solving for s_gold, we get:

s_gold = (m_water * s_water * ΔT_water) / (m_gold * ΔT_gold)

Plugging in the given values, we get:

s_gold = (64.000 g * 4.184 J/g⋅°C * (25.78°C - 25.00°C)) / (38.600 g * (25.78°C - 25.00°C))

s_gold = 6.962 J/g⋅°C

Comparing this value to the table of specific heats given, we see that it is closest to the specific heat of lead (0.130 J/g⋅°C). Therefore, the identity of the mystery metal is most likely lead.

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The complete question is given as follows:

Answer:

Factors

Explanation:

Hope i helped u

Answer:

Average Power = 14599.24 W

Explanation:

We know that :

\(power = \frac{work \: done}{time} \)

\(work \: done \: = force \times displacement \: \cos( \alpha ) \)

Acceleration of car (a) = v - u / t

= 13. 8 - 0 / 13.5

= 1.02 m / sec ^2

Displacement (s) = v^2 / 2a

= 13.8 * 13.8 / 2.04

= 93.35 m

Now,

Resultant force = F (Car) - F (Resistance) = m * a

Force (Car) = m * a + Force (Resistance)

Force (Car) = 1744.2 + 367.1 = 2111.3 N

Work done by Car = Force (Car) * Displacement

= 2111.3 * 93.35 * Cos 0°

= 197089.85 J

Average Power = Work Done / time

= 197089.85 J / 13.5 sec

= 14599.24 W

Adam's uncertainty about whether he will be thanked or criticized for helping cook dinner relates to his behavior-outcome expectancies.

Behavior-outcome expectancies refer to a person's beliefs about the outcomes or consequences that are likely to follow from their actions. In this scenario, Adam is uncertain about the potential outcomes of his behavior, specifically whether he will be thanked or criticized for helping cook dinner. In this case, Adam's uncertainty specifically revolves around his behavior-outcome expectancies (D). He is unsure about the potential responses he will receive for his action of helping cook dinner. This uncertainty may stem from factors such as past experiences, social norms, or the specific dynamics and expectations within his household. Adam's uncertainty highlights the importance of understanding and managing behavior-outcome expectancies in interpersonal interactions and decision-making processes.

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The energy liberated in a reaction can be calculated in both MeV and joules, and depends on the specific reaction and the masses of the particles involved.

The energy liberated in a reaction is the difference in mass-energy between the reactants and the products. This energy is typically measured in electron volts (eV) or mega-electron volts (MeV), and can also be converted into joules (J) using the conversion factor \(1 MeV = 1.602 \times 10^{-13 }\)J. The specific value of energy liberated in a reaction depends on the reaction itself, as well as the masses of the particles involved. For example, in nuclear reactions, the mass defect is typically very small, leading to large amounts of energy being released in the form of radiation. In chemical reactions, the mass defect is much smaller, leading to much smaller amounts of energy being released in the form of heat. To calculate the energy liberated in a specific reaction, the difference in mass between the reactants and the products must be calculated using the equation \(E=mc^2\), where E is the energy, m is the mass difference, and c is the speed of light. This energy can then be converted into the desired units, either MeV or joules, using the appropriate conversion factors.

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Answer:

ultraviolet

Explanation:

think of the color with the highest wavelength, then add a prefix

thats the answer 121500J

The total mechanical kinetic energy of the rider and motorcycle is  121500 Joule.

Mechanical energy, also known as kinetic energy or potential energy, is the energy that an object possesses when it is in motion or the energy that an object stores due to its location. Renewable energy is also fueled by mechanical energy. In order to efficiently produce electricity or convert energy, many sources of renewable energy depend on mechanical energy.

Given parameters:

Mass of the person: m = 70 kg.

Mass of the motorcycle: M = 200 kg.

Speed of the motorcycle: v = 30 m/s.

Total mass of the person and the motorcycle = m + M = 70 kg + 200 kg = 270 kg.

Hence, total mechanical kinetic energy = 1/2 × total mass × speed²

= 1/2 × 270 × 30² Joule

= 121500 Joule.

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According to conservation of energy, the energy of interacting bodies in a closed system remains constant. The total energy of an isolated system remains constant; it is said to be conserved over a period of time.

Elastic energy is the mechanical implicit energy stored in the configuration of a material or physical system as it's subjected to elastic distortion by work performed upon it. Elastic energy occurs when objects are impermanently compressed, stretched or generally misshaped in any manner.

The mechanical energy is never lost forever , rather it gets converted to thermal energy because of the friction .

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There are 7 atoms of bromine (br) are present in this molecule, 4pbr₃.4pbr3 is divided into 4 pb atoms and 7 bromine atoms.

The atom consists of matter that may be split without releasing electrical charges.

It's also the smallest unit of matter with chemical element features. As a result, the atom is the fundamental unit of science.

In the nucleus, proton and the neutron is existing. The condition of the atom to be electrically neutral is that the number of the proton and electron should be the same.

4pbr₃, consists 4 atoms of pb and 7 atoms of bromine.

Hence.there are 7 atoms of bromine (br) are present in this molecule, 4pbr₃.

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