help please i will be glad​

Answer:

I think it's Miami-Dade

Explanation:

i hope this helps

Answer:

it is miami-dade!

Explanation:

The final temperature of the air is (c) 193°C.

Explanation:-

Given,

The initial pressure, P1 = 1 MPa

The initial temperature, T1 = 400 °C

The final pressure, P2 = 110 kPa

The polytropic exponent, n = 1.2

We need to determine the final temperature of the air.

Solution:

For the polytropic process with a given polytropic exponent n, the work done can be given as;

W = P1V1 (1 - n) / (n - 1) [1 - (P2 / P1) ((n - 1) / n)] -------------- [1]

Where,V1 = (mRT1) / P1 ------------- [2]

V2 = (mRT2) / P2 ------------- [3]

Combining equations [2] and [3], we get;

V2 / V1 = P1 / P2 * T2 / T1T2

= T1 (V2 / V1) * (P2 / P1) --------------- [4]

Now, substituting equation [2] into equation [1],

we get;

W = (mRT1) / P1 * (1 - n) / (n - 1) [1 - (P2 / P1) ((n - 1) / n)]

Also, substituting equation [4] into equation [1],

we get;

W = (mR T1) / P1 (1 - n) / (n - 1) [1 - (P2 / P1) ((n - 1) / n)]T2

= T1 (1 - n) / n [1 - (P2 / P1) (n - 1)] ------------ [5]

where m is the mass of the gas and R is the gas constant.

For air, the value of R is 0.287 kJ/kg.K.

Substituting the values in equation [5],

we get;T2 = 400 × (1 - 1.2) / 1.2 [1 - (110 / 1000) (1.2 - 1)]

= -220.34 K (-53.81°C)

However, the final temperature of the air cannot be negative.

Therefore, the process must be irreversible or isothermal.

Thus, the option (c) 193°C is the correct answer.

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The total resistance of the circuit, given that parallel circuit has two resistors at 15 and 40 ohms is 11 ohms.

From the question given, the follow data were obtained:

The total resistance in the circuit can be obtained as follow:

R = (R₁ × R₂) / (R₁ + R₂) => Parallel arrangement

= (15 × 40) / (15 + 40)

= 600 / 55

= 11 ohms

Thus, we can conclude that the total resistance 11 ohms. None of the options are correct.

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The wind (W) is blowing at 35.0km/h, south. The northern component of the airplane’s velocity relative to the ground is

  (v AP,G ) y =(v AP,W ) y +(v W,G ) y =630km/h−35.0km/h    =595km/h

Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement. Put another way, speed is a scalar value, while velocity is a vector.

Velocity is the rate of change of displacement. Acceleration is the rate of change of velocity. Velocity is a vector quantity because it consists of both magnitude and direction. Acceleration is also a vector quantity as it is just the rate of change of velocity.

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Four views of a horseshoe magnet and a current-carrying wire are shown in the drawing. The wire is perpendicular to the screen, and the current is directed out of the screen towards you.

The magnetic force acting on a current-carrying wire is influenced by the direction of the current flow and the direction of the magnetic field, which is decided by the magnetic pole it is near. The magnetic field lines created by a bar magnet, for example, run from the north to the south pole.In the given figure, the magnetic field lines are moving from north to south, as shown by the white arrow.

When the direction of the current is perpendicular to the direction of the magnetic field, a magnetic force is exerted on the current-carrying wire. According to the right-hand rule, the magnetic force on the wire will be perpendicular to both the current-carrying wire and the direction of the magnetic field.

According to the right-hand rule, magnetic force will be directed north in the first view (A), and magnetic force will be directed east in the third view (C).

Therefore, magnetic force on the current points due north in the first view (A).Hence, the answer is the first view (A).

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Answer:

it begins to move to the right! :)

Answer:

If you change the number of neutrons in an atom, you get an isotope of the same element. The addition of a neutron can make an atom radioactive. When you change the number of protons in an atom, you will change the atom from one element to a different element.

Explanation:

The characteristics of the atomic nucleus allow to find the answer for the effect of the change of neutrons in an atoms is

A chemical element is made up of protons, neutrons and electrons; the first two are in the atomic nucleus and the electrons are in orbits around them.

The number of protons corresponds to the atomic number and its change changes the type of element.

The neutrons that are neutral charge together with protons form the mass of the atom, as neutrons are neutral if the number does not affect the type of atom, but if its atomic mass changes.

Elements with the same atomic number, but different atomic mass, different number of neutrons are called isotopes; in general all elements have isotopes, for example hydrogen has an isotope called deuterium that has a neutral and another radioactive isotope called tritium that has two neutrons.

In conclusion using the characteristics of the atomic nucleus we find the answer for the effect of the change of neutrons in an atoms is

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The value of capacitor C2 in the given parallel circuit arrangement of the capacitors is 25 F.

The capacitance of the circuit is calculated as follows.

Assuming a parallel circuit arrangement for the capacitors;

C(total) = C1 + C2

58 F = 33 F + C2

C2 = 58 F - 33 F

C2 = 25 F

Thus, the value of capacitor C2 in the given parallel circuit arrangement of the capacitors is 25 F.

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Answer:

V = f * λ           velocity equals frequency * wavelength

If f is increased then λ must decrease for the velocity to remain constant.

Answer:

The Western Hemisphere contained significantly higher amounts of shock-fractured quartz. This led Walter and Luis Alvarez to hypothesize that the asteroid impact site was in the Western Hemisphere.

Explanation:

Answer:

1,732

Explanation:

The distance between two successive troughs or crests is known as the wavelength. The wavelength of the light will be 1000 nm.

How do you define wavelength?

The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point, while the trough is the lowest.

The wavelength is also defined as the distance between two locations in a wave that have the same oscillation phase.

Diffraction angle= 30⁰

Diffraction grating per mm= 250

wavelength = ?

Mathematically the equation of bright band is given by

\(\rm \lambda= \frac{sin\theta}{nN}\)

\(\rm \lambda= \frac{sin23^0}{250\times 2}\)

\(\rm \lambda= 0.000001\) m

\(\rm \lambda= 1000 nm\)

Hence the wavelength of the light will be 1000 nm.

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The flight distance between St. Louis and Boston is 1677.5 Km

Speed is the distance travelled per unit. Mathematically, it can be expressed as:

Speed = distance / time

With the above formula, we can stain the flight distance between St. Louis and Boston. Details below.

The following data were obtained from the question:

The flight distance can be obtained as follow:

Speed = distance / time

Cross multiply

Distance = speed × time

Distance = 610 × 2.75

Distance = 1677.5 Km

Thus, flight distance between St. Louis and Boston is 1677.5 Km

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Answer:

exoplanets is any planet beyond our solar system.

Recall that the velocity is the rate of the change of position.

Mathematically,

Notice from the position graph that it is a uniform motion.

To find the rate of change, select any two points on the line.

(1, 1) and (3, 3)

This means that the velocity is 1 m/s and it is constant.

2 N Right

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

Answer:

2 N Right

Explanation:

Net force = 5 - 3

= 2 N to the Right

The situations that sonar be most practical is option A: Measuring the distance between objects in the ocean.

Sonar, short for sound navigation and ranging, is a technology that uses sound waves to determine the distance and location of objects in the ocean.

Therefore,  It works by emitting a sound wave and measuring the time it takes for the wave to bounce back, which allows the system to calculate the distance to the object. This technology is commonly used in navigation, search and rescue, and underwater mapping.

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(a) The tension in the tow line is 500 N.

(b) The distance travelled by the car before coming to rest is 10 m.

The tension in the tow line is calculated by applying the following formula as shown below.

T = ma

where;

T = 1000 kg x 0.5 m/s²

T = 500 N

The distance travelled by the car before coming to rest is calculated as follows;

a = F / m

a = ( 5000 N ) / ( 1000 kg )

a = 5 m/s²

v² = u² - 2as

where;

2as = u²

s = ( u² ) / ( 2a )

s = ( 10² ) / ( 2 x 5 )

s = 10 m

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Atoms are the smallest units of an element that retain its chemical properties, and when they combine, they form molecules.

Molecules are the basic building blocks of matter. They are composed of two or more atoms chemically bonded together. Molecules can consist of atoms of the same element or different elements.

For example, oxygen gas (O2) is made up of two oxygen atoms bonded together, while water (H2O) is composed of two hydrogen atoms and one oxygen atom. Molecules can have different sizes and complexities, ranging from simple diatomic molecules to large and intricate organic molecules found in living organisms.

The formation of molecules occurs through chemical bonding, which involves the sharing, gaining, or losing of electrons between atoms. The most common types of chemical bonds are covalent bonds, where atoms share electrons, and ionic bonds, where atoms transfer electrons to form oppositely charged ions that attract each other.

Molecules are essential in determining the properties and behavior of substances. The arrangement and types of atoms within a molecule determine its chemical and physical properties. For example, the arrangement of carbon and hydrogen atoms in a molecule can give rise to properties such as flammability and volatility.

Molecules play a fundamental role in various scientific fields, including chemistry, biology, and physics. They participate in chemical reactions, form the basis of compounds, and interact with each other to create the diverse substances and materials found in the universe.

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1. The polytropic index is \($$Q=293.28\,\text{kJ}$$\). 2. the mass flow rate of steam through the nozzle is 2.61 kg/s. 3. The heat transfer to the cooling water  is \($$Q=200.46\,\text{kW}$$\). 4. the heat transfer rate per unit area through this double-pane window is 38.46 W/m².

1. To calculate the polytropic index,

we need to use the following equation:

\($$PV^n=C$$\)

\($$\frac{P_1V_1^n}{T_1}=\frac{P_2V_2^n}{T_2}$$\)

where P, V and T are the pressure, volume, and temperature of the gas, respectively.

Substituting the given values, we have:

\($$\frac{P_1V_1^n}{T_1}=\frac{P_2V_2^n}{T_2}$$\)

\($$\frac{(1\times0.1^n)}{299}= \frac{(P\times0.02^n)}{523}$$\)

Taking the natural logarithm of both sides of the equation above, we obtain:

\($$n=\frac{\ln(P_2V_2/P_1V_1)}{\ln(T_2/T_1)}$$\)

\($$n=\frac{\ln(523\times1/299\times0.02)}{\ln(250/26)}$$\)

Therefore, the polytropic index is:

\($$n=1.29$$\)

The final pressure of the air after compression can be calculated using the following equation:

\($$PV^{\gamma}=C$$\)

where γ is the ratio of specific heats for air which is 1.4.

Substituting the given values, we have:

\($$P_1V_1^{\gamma}=P_2V_2^{\gamma}$$\)

\($$1\times0.1^{1.4}=P_2\times0.02^{1.4}$$\)

\($$P_2=12.44\,\text{bar}$$\)

The heat transfer to the air can be calculated using the following equation:

\($$Q=C_p(m_2-m_1)T$$\)

\($$Q=C_p(P_2V_2-P_1V_1)$$\)

\($$Q=C_p(12.44\times0.02-1\times0.1) \times(250-26)$$\)

\($$Q=293.28\,\text{kJ}$$\)

2. The mass flow rate of steam through the nozzle can be calculated using the following equation:

\($$\frac{m}{A}=\rho V$$\)

\($$\rho=\frac{P}{RT}$$\)

\($$V=\sqrt{\frac{2(h_1-h_2)}{\gamma R(T_1-T_2)}}$$\)

where h is the specific enthalpy,

γ is the ratio of specific heats which is 1.3 for steam,

R is the gas constant,

and T is the absolute temperature.

Assuming that the change in potential energy is negligible

, h1=h2.

Substituting the given values, we have:

\($$\frac{m}{A}=\rho V$$\)

\($$\rho=\frac{P}{RT_1}$$\)

\($$V=\sqrt{\frac{2h}{\gamma RT_1}}$$\)

\($$\frac{m}{0.005}=\frac{3\times10^5}{0.461\times523}\sqrt{\frac{2\times2960\times10^3}{1.3\times0.461\times523\times523}}$$\)

\($$m=2.61\,\text{kg/s}$$\)

Therefore, the mass flow rate of steam through the nozzle is 2.61 kg/s.

3. The heat transfer to the cooling water can be calculated using the following equation:

\($$Q=mC_p(T_2-T_1)$$\)

\($$Q=1.5\times4184\times(85-32)$$\)

\($$Q=200.46\,\text{kW}$$\)

Two assumptions made to analyze this problem are steady-state and constant heat transfer coefficient.

4. The heat transfer rate per unit area through this double-pane window can be calculated using the following equation:

\($$Q=\frac{(T_{1}-T_{2})}{\frac{L_{1}}{k_{1}}+\frac{L_{2}}{k_{2}}+\frac{L_{3}}{h_{1}}+\frac{L_{4}}{h_{2}}}$$\)

where T1 is the room temperature,

T2 is the outdoor temperature,

L is the thickness,

k is the thermal conductivity,

and h is the convective heat transfer coefficient.

Substituting the given values, we have:

\($$Q=\frac{(23-(-20))}{\frac{5\times10^{-3}}{0.78}+\frac{5\times10^{-3}}{0.78}+\frac{12\times10^{-3}}{4\times10^{0}}+\frac{12\times10^{-3}}{4\times10^{0}}}$$\)

\($$Q=38.46\,\text{W/m²}$$\)

Therefore, the heat transfer rate per unit area through this double-pane window is 38.46 W/m².

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Answer:

The formula for force according to Newton's second law of motion is F=ma or force for an object to move is equal to mass times acceleration.

Acceleration or average acceleration defined as change in velocity per time.

F=ma

F=1.2x10³kg*(20m/s)(1/5s)=4.8x10³  Newtons

Explanation:

fthat's not the answer then i'm sorry

During exercise, the major mechanism of heat loss is evaporation of sweat from the skin. Sweat evaporation is a thermoregulatory process that allows humans to maintain a relatively constant internal body temperature when engaging in exercise.

As a result of exercise, metabolic heat is generated. When the internal temperature rises, thermoreceptors in the hypothalamus are activated, causing sweat glands to be stimulated through sympathetic nerve fibers.The sweat produced then evaporates off the skin and removes the heat generated by exercise, thus cooling the body. However, sweat evaporation is only effective in removing heat if the ambient temperature is lower than the skin temperature. If the ambient temperature is higher than the skin temperature, then sweat cannot evaporate, and heat will not be removed from the body. Other mechanisms of heat loss, such as conduction, convection, and radiation, are less important than sweat evaporation during exercise.

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The speed of light in a vacuum is the same for all frames of reference.

so "Light travels through space at a speed of 3.0 x 10^8 m/s."

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Answer: 0.25 m/s

Explanation:  Speed = wavelengt · frequency  

v = λf   and frequency is 1/period  f = 1/T

Then v = λ/T = 5 m / 20 s = 0.25 m/s

The largest deflection from the isoelectric line in the ECG is found in the QRS complex.

The correct option is D.

An ECG (electrocardiogram) is a medical test that records the electrical activity of the heart. It is a non-invasive procedure that involves attaching electrodes to the skin of the chest, arms, and legs, which detects the electrical signals generated by the heart as it beats. These signals are amplified and recorded, producing a visual representation of the heart's electrical activity over time, known as an ECG waveform.

The QRS complex is the largest deflection from the isoelectric line in the ECG. It represents the depolarization of the ventricles and is typically a sharp, narrow peak.

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Answer:

The electricity produced from the main source which is an electrical generator which is usually close a remote abundant source of natural energy or at a distant location away from the residential areas where the electricity is used

The step up transformer is  the device used to raise the voltage and therefore lower the current of the of incoming generated electricity before it is transmitted through high tension cables so that the energy loss from source to destination is reduced and the electricity generated can applied where needed

However, the high voltage transmitted along power lines to reduce energy loss cannot be used as it is by the consumer, partly because it is very harmful in the event of an electric shock and can easily damage household electrical devices, therefore, the high voltage in the power lines is reversed back or lowered into voltages which can be used to power electrical devices in buildings with the use of a step-down transformer

Explanation:

Answer: Speed

Explanation:

Speed is the time it takes something to travel a certain distance. Accelaration is the rate at which an object's speed changes. Velocity is a vector of the object's speed and direction.

Given,

Weight of a block on the Earth = 980 N

Acceleration due to gravity on Earth = 9.8 N/kg

To find,

Weight of the block on the moon.

Solution,

The  moon has acceleration (1/6) times that on earth. Let m be the mass of the block on the moon.

We know that,

W = mg

\(m=\dfrac{W}{g}\\\\m=\dfrac{980}{9.8}\\\\=100\ kg\)

As mass of an object remains the same everywhere. Weight of the block on Moon is :

W' = mg'

As g'=(g/6)

So,

\(W=100\times \dfrac{g}{6}\\\\=100\times \dfrac{9.8}{6}\\\\=163.33\ N\)

So, the weight of the block on the moon is 163.33 N.