what is the reactance of an inductor with an inductance of 2.60 h at a frequency of 75.0 hz ?

Answer:

The final temperature is 35 °C.

Explanation:

Given that,

Mass of the wooden block, m = 0.2 kg

The specific heat of the block, c = 710 J/(kg°C)

Initial temperature, \(T_i=20^{\circ} C\)

Thermal energy, Q = 2130 J

We need to find the block's final temperature. The thermal energy due to change in temperature is given by :

\(Q=mc(T_f-T_i)\\\\T_i\ \text{is initial temperature}\\\\\dfrac{Q}{mc}=(T_f-T_i)\\\\T_f=\dfrac{Q}{mc}+T_i\\\\T_f=\dfrac{2130}{0.2\times 710 }+20\\\\T_f=35^{\circ} C\)

So, the final temperature is 35 °C.

When the difference is small, that is the starting orbit is just one level above the ending orbit, the wavelength of the photon will have a relatively small value.

Atomic emission is the process of light emission from an atom that occurs when the atom gets excited by either heating, bombarding with electrons, or a discharge of electric current. When an atom is excited, the electrons gain energy and move to a higher energy level or shell. When they return to the lower energy state, they emit energy in the form of electromagnetic radiation or light.

The energy of the emitted photon or light is directly proportional to the difference in the energy levels of the atom before and after the emission process. The relationship is given by:E=hfwhere E is the energy of the emitted photon, h is the Planck's constant, and f is the frequency of the emitted photon. The frequency of the emitted photon can be calculated using the formula:f=c/λwhere c is the speed of light and λ is the wavelength of the photon.

Thus, for an atom to emit radiation of a particular wavelength, the difference in energy levels of the atom must correspond to that wavelength. If the difference is small, the wavelength of the emitted photon will also be small, and if the difference is large, the wavelength of the emitted photon will be large.

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Centripetal force on the end of a 66.0 m (radius) wind turbine blade that is rotating is calculated as = 1.23 *10^-4 N.

Centripetal force is the force acting on the object in curvilinear motion directed towards axis of rotation or the center of curvature and the unit of centripetal force is newton. It is directed perpendicular to the direction of the displacement of the object.

Given, radius= 66m mass is 3.4 kg

Given 0.47 rev/s

Angular velocity = 0.47 * 2π / 60

= 0.049 m/s

Centripetal force = mass * velocity²/radius

= 3.4 *  0.049² /66

Centripetal force= 1.23 *10^-4 N

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Answer:

because heat evaporates water

Explanation:

Answer:

Mass is a base unit, acceleration is a derived unit calculated as a function of length and time which are both base units. Any unit definition that is a function of more basic units is considered a derived unit.

Answer:

Explanation:

6.2 miles

Answer: 1. 264, 2.33

Explanation: Explanation: 66m= 6s so, to find the position at 3s you just need to take 66/2 = 33m cause 3 is half of 6. & for 2 you will take 66x4= 264m cause it took 4s multiply by the original 6s to get 24s. Answer: 1 is 264m & 2 is 33m.

Answer:

t = 4.47 seconds

Explanation:

Given that,

Speed of a train, v = 360 m/s

We need to find the time taken by the train to cover 1 mile. For this first we must know 1 mile equal to how many meters.

1 mile = 1609.34 m

Let t is time.

Speed = distance/time

\(t=\dfrac{d}{v}\\\\t=\dfrac{1609.34\ m}{360\ m/s}\\\\t=4.47\ s\)

So, it will take 4.47 seconds to travel one mile.

Answer:

isobaric process

Explanation:

An isobaric process occurs at constant pressure. Since the pressure is constant, the force exerted is constant and the work done is given as PΔV.

Answer:

well for me I think it's

Explanation:

Charles law in gas laws

Among primate group members, energy requirements are highest for reproductive females.

Reproductive females in primate groups generally have the highest energy requirements compared to other group members. This increased energy demand is primarily due to the energetic costs associated with reproduction and maternal care.

During pregnancy, female primates undergo physiological and metabolic changes to support the growth and development of the fetus. This includes increased nutrient intake to provide the necessary energy and resources for fetal development. As a result, pregnant females often require higher caloric intake and specific nutrients to meet the demands of both their own metabolic needs and those of the developing offspring.

After giving birth, lactation further contributes to the high energy requirements of reproductive females. Producing and providing milk to nourish the newborn requires a substantial amount of energy and nutrients. Lactating females need to maintain a consistent supply of energy-rich foods to sustain their own health and produce an adequate milk supply for their offspring.

Hence, Among primate group members, energy requirements are highest for reproductive females.

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A joint is not a wave-like undulation of rock layers in response to stress. False statement.

Instead, a joint is a type of fracture in rocks where there has been no significant displacement. The wave-like undulation you are referring to is called a fold, which occurs when rock layers are compressed and deformed under stress

A joint is a type of fracture or break in rock that occurs when there is no movement between the two sides of the fracture. Joints are formed in response to stresses such as tectonic activity or changes in temperature and pressure and are a common feature in many types of rocks.

While joints can sometimes give the appearance of a wave-like undulation in rock layers, this is not the same as a true wave-like undulation such as a fold or a fault. Folds are undulations in rock layers that result from compressive stresses that cause the layers to bend and deform, while faults are fractures in the rock where the movement has occurred along one side of the fracture relative to the other.

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Answer:

Explanation:

For refraction , the formula is

sin i / sin r = μ₂ / μ₁

where light is travelling from medium 1 to 2 having refractive index of μ₁ and μ₂ . Angle of incidence in medium 1 is i and angle of refraction in medium 2 is r .

Here i = 70°, r = 37°

μ₁ = 1.8 ,μ₂ = ?

sin70 / sin 37 = μ₂ / 1.8

.939 / .602 = μ₂ / 1.8

1.56 =  μ₂ / 1.8

μ₂ = 2.81 .

The value of refraction index for the second medium will be  \(\mu_2=2.16\)

Every material has a different refractive index. The refracted index of any material shows that the light is refracted by how much angle.

So like for water its value will be different also for glass its value will be different.

Now it is given in the question that

Angle of incidence \(i=70^o\)

Refractive index of the first medium \(\mu_1=1.8\)

Angle of refraction \(r=37^o\)

Now from snells law

\(\dfrac{Sin \ i}{Sin \ r} = \dfrac{\mu_2}{\mu_1}\)

\(\dfrac{Sin70}{Sin37} = \dfrac{\mu_2}{1.8}\)

\(\mu_2= \dfrac{Sin70\times1.8}{Sin37}\)

\(\mu_2=2.16\)

Thus the value of the refraction index for the second medium will be  \(\mu_2=2.16\)

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The change in temperature if an object goes from 273 k to 243 k is -30 K. ΔT=T f - T i, where T f is the final temperature and T i is the initial temperature, gives the temperature change.

Celsius to Kelvin conversion: Kelvin = Celsius + 273 1.5. The value of 273 is also utilized in place of 273.15.

Fahrenheit, Celsius, and Kelvin are the three scales that are most frequently used to measure temperature (K).

The majority of climate change specialists concur that the temperature increase is mostly caused by greenhouse gases, which trap heat and keep it from rising into the Earth's atmosphere. Even though there is a global focus on lowering greenhouse gas emissions, temperatures are still rising.

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Answer:

saxsccd

Explanation:

Answer:

Chemical energy (Also considered potential energy)

Explanation:

Answer:

About 250 Hz

Explanation:

People of All ages without a hearing impairment should be able to hear the 8000hz. People under 50 should be able to hear the 12,000hz and people under 40, the 15,000hz. Under 30s should hear the 16,000hz, and the 17,000hz is receivable for those under 24.

Answer:

a=2.1 m/s^2

Explanation:

F=ma

a=F/m

a=25/12

a=2.1 m/s^2

Answer:

1/3

Explanation:

Velocity ratio = distance moved by effort / distance moved by load

(a) A = B × r is a vector potential for B, where r = {x, y, 0}.

(b) The flux through a surface S can be calculated as Φ = ∫B·dA, where B is the magnetic field and dA is an infinitesimal area vector perpendicular to the surface.

(a) To verify that A = B × r is a vector potential for B, we need to show that ∇ × A = B.

Using the cross product property, we have ∇ × A = ∇ × (B × r). Applying the vector identity (A × B) × C = B(A · C) - C(A · B), we get ∇ × (B × r) = B(∇ · r) - r(∇ · B).

Since ∇ · r = 0 (as r = {x, y, 0}), and ∇ · B = 0 (as B has a constant magnitude in the z-direction), we find that ∇ × A = B, verifying A = B × r as the vector potential for B.

(b) The flux through a surface S can be calculated as Φ = ∫B·dA, where B is the magnetic field and dA is an infinitesimal area vector perpendicular to the surface.

Given that B has a constant strength b teslas in the z-direction, the flux through surface S will be Φ = ∫B·dA = ∫(0, 0, b) · (dxdy) = b∫dxdy = bA, where A is the area of the surface S.

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It should be noted that Rust and sodium nitrite were been produced during the reaction between the iron pipes and the fertilizer.

Chemical reaction can be regarded as a process involving conversation of one or more substances, known as reactants, are converted to different substances known as products.

When iron pipes and the fertilizer which are reactants react together, then products of Rust and sodium nitrite is formed.

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Answer: An atom's emission of light with a specific amount of energy confirms that atoms must have a dense central mass surrounded by electrons at a distance

plz mark brainliest

Answer:

It's B, electrons emit and absorb energy based on their position around the nucleus.

Answer:

36g

Explanation:

formula;

density=mass/volume

density*volume=mass

3*12=36g

hope this helps :D

Answer:

3.34g/cm

Explanation:

The voltmeter should be connected in parallel with the variable resistor while the ammeter is connected in series with the nichrome wire and other electrical components.

A parallel circuit can be defined as an electrical circuit with the same potential difference (voltage) across all of its terminals.

In Science, a voltmeter can be defined as an electrical instrument that is designed and developed for the measurement of the voltage in an electrical circuit. On the other hand, an ammeter refers to an electrical instrument that is used for measuring the amount of current flowing through an electrical circuit.

In conclusion, it is very important that the voltmeter is connected in parallel with the variable resistor and the ammeter should be connected in series with the nichrome wire because it has small resistance and opposition to the flow of current.

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Answer:

Yes! Thinking about it graphically a position vs time graph models meters per second in most cases, making every point on the line have the units m/s. If we want the find the slope we are finding the change between each point and those units would change to m/s/s or m/s^2 giving us the same units for acceleration. Simply put, slope of a velocity graph gives us acceleration.

Explanation:

Answer:

Elastic force

Explanation:

Elastic force occur when deformed or elastic object try to return to its original or natural length. When an elastic material is stretched, it resist it change in shape. The force act to return the elastic material to its original shape, it's then exert a counter force in opposit e direction.

Answer:

If you ring the doorbell and no one opens the door, you'll infer that no one is home rather than continuing to ring the doorbell to an empty house. Being able to understand this and look for another solution is another example of mental flexibility.

Explanation:

For a long time, constructing new power stations was the primary solution to increased energy demands. However, this is no longer seen as a feasible solution for several reasons. First and foremost, new power stations are expensive to build and maintain. They necessitate a significant financial investment.

Additionally, new power stations can take years to construct. This is a long period to wait for additional energy capacity, particularly if demand is already high. In comparison, renewable energy sources such as wind and solar power have a much shorter installation period.

Finally, constructing new power stations to meet increased energy demand is frequently reactive rather than proactive. It only addresses the present energy demand rather than considering potential future needs. As a result, it is a short-sighted solution that is unlikely to be sustainable in the long run.

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Displacement includes direction, distance does not

is your answer. hope it helps!

The term that best describes the landform "dip in a mountain range" is C. Syncline.

Syncline is a term to refer to a fold of the Earth's crust caused by the tectonic effects of the earth's dynamics. A synclinal fold is characterized by being a concave fold, that is, in the shape of a U.

According to the above, answers A, B and D are not correct options because they refer to different shapes of the Earth. Therefore, the landform shown is syncline.

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Answer: C

Explanation: E2022

Answer:

I already know the first one is electromagnetic but I don't know the second one sorry

Explanation: