what is the engine's thermal efficiency if the gas volume is halved during the adiabatic compression?

Answer:

jgfsdghjjuk

Explanation:

khhnghjj

When calcium loses two electrons to form Ca2+ ion, it has a total of 40 nucleons.

Calcium has an atomic number of 20, implying that it has 20 protons, which is the same as the number of electrons in a neutral calcium atom. Ca2+ is the symbol for calcium ion, and it is formed when calcium loses two electrons. As a result, Ca2+ has a total of 18 electrons. Since electrons are not nucleons, the question is asking for the number of nucleons, which refers to the sum of protons and neutrons.
To determine the total number of nucleons in the Ca2+ ion, we must first determine the number of neutrons in a calcium atom. The atomic mass of calcium is 40.078 g/mol, which means it has 20 neutrons because atomic mass = protons + neutrons. The Ca2+ ion has the same number of protons as the neutral calcium atom (20), therefore it has a total of 20 + 20 = 40 nucleons.

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1.) Electrons go back into like a lower energy level then would be release a thing called a photon light.

2.) I'm not sure on the correct numbers exactly but if I remember correctly around 70-80 percent is nitrogen, around 20-25 is percent oxygen, 0.9 percent is argon, and 0.1 percent other gases. 

3.) Glass is made from sand at least that's one popular element of making sand. one gathered, they are put into a high temperature and would soon make glass coming out of it within time.

Answer:

b) a compound which produces ions dissolved in a solution that conduct electricity.

NaCl is an electrolyte.

Answer:

When sunlight strikes a solar panel what form of energy is transformed to?

Solar radiation may be converted directly into electricity by solar cells (photovoltaic cells). In such cells, a small electric voltage is generated when light strikes the junction between a metal and a semiconductor (such as silicon) or the junction between two different semiconductors.

Explanation:

Answer:

Explanation:

the Abu Dhabi Petroleum Company

The first commercially viable oil discovery was made at Bab in 1960. In 1962, the company was renamed the Abu Dhabi Petroleum Company. Exports began to flow from the Jebel Dhanna terminal on December 14, 1963.

Answer:

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The angular momentum of a system is constant if the total linear momentum of the system is zero.

The main answer is that if the total linear momentum of a system of particles is zero, the angular momentum of the system remains constant regardless of the choice of origin. Angular momentum is a measure of rotational motion and depends on the distribution of mass and velocity within the system

When the total linear momentum is zero, it implies that the system's center of mass is stationary or moving at a constant velocity. In such cases, the system's angular momentum is independent of the origin chosen for calculations.

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Answer:

Pyrometer, device for measuring relatively high temperatures, such as are encountered in furnaces. Most pyrometers work by measuring radiation from the body whose temperature is to be measured. Radiation devices have the advantage of not having to touch the material being measured.

Explanation:

The polar coordinates of point B(-3,4) are (5, -53.13°).

To convert rectangular coordinates B(-3,4) to polar coordinates, we need to use the following formulas:
r = √(x^2 + y^2)
θ = tan^-1(y/x)
Where r represents the distance from the origin to the point, and θ represents the angle formed by the line connecting the point and the origin with the x-axis.
Using the given rectangular coordinates, we have x = -3 and y = 4. Substituting these values into the formulas, we get:
r = √((-3)^2 + 4^2) = √(9 + 16) = √25 = 5
θ = tan^-1(4/-3) = -53.13° (rounded to two decimal places)
In summary, to convert from rectangular coordinates to polar coordinates, we need to use the formulas for r and θ, which involve calculating the distance from the origin to the point and the angle formed by the line connecting the point and the origin with the x-axis. In this case, we obtained the polar coordinates (5, -53.13°) from the given rectangular coordinates B(-3,4).

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Answer:

250

Explanation:

pressure = depth x density of liquid x g

5000 = 2 x density x 10

density = 250

It can be concluded that according to the Big Bang theory, the Universe is much older than the Earth.

According to the Big Bang theory, the Universe is much older than the Earth. The Big Bang theory suggests that the Universe began as a small, hot, and dense singularity around 13.8 billion years ago. It then expanded and cooled rapidly, eventually forming atoms, stars, and galaxies. In contrast, the Earth formed around 4.5 billion years ago from the accretion of dust and gas in the solar nebula. The age of the Universe has been estimated through various methods, including measurements of the cosmic microwave background radiation and the distances to faraway galaxies. These estimates consistently point to an age of around 13.8 billion years. Therefore, it can be concluded that according to the Big Bang theory, the Universe is much older than the Earth.

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In order to solve the given question, we can apply Coulomb's law.

which states that the force of attraction or repulsion between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

The equation can be written as:F=kq1q2/r^2where F is the force, k is Coulomb's constant, q1 and q2 are the charges, and r is the distance between them.Using this formula,

we can calculate the force on the particle q at the origin as follows:

The force due to q1 is:\(F1=kq1q/r1^2\)where r1 is the distance between q1 and q.\(F1=(9×10^9)(3.4×10^(-9))(4.74×10^(-9))/(0.235)^2F1=3.66×10^(-5) N\)(in the negative x direction)b

The force due to q2 is:\(F2=kq2q/r2^2where r2 is the distance between q2 and q.F2=(9×10^9)(5.1×10^(-9))(4.74×10^(-9))/(0.235)^2F2=4.93×10^(-5) N\) (in the positive y direction)

The net force on the particle q is the vector sum of F1 and \(F2:F=F1+F2=√(F1^2+F2^2)F=5.96×10^(-5) NThe direction of the net force is given by:θ=tan^(-1)(F2/F1)θ=tan^(-1)(4.93×10^(-5)/3.66×10^(-5))θ=51.4\)degrees Counterclockwise from the +x axis, this angle is 51.4 degrees.

The magnitude of the electric force on the particle q is 5.96×10^(-5) N, and its direction is counterclockwise from the +x axis at an angle of 51.4 degrees.

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Answer:

El equilibrio térmico se alcanzará a los 152ºC.

Explanation:

Dado que un ladrillo de 2kg que se encuentra a 200º c, se sumerge en 5 kg de agua a 32º, para determinar a qué temperatura se alcanza el equilibrio térmico se debe realizar el siguiente cálculo:

2+5 = 7

(200 x 5 + 32 x 2) / 7 = X

1064 / 7 = X

152 = X

Por lo tanto, el equilibrio térmico se alcanzará a los 152ºC.

The time taken is 0.42 seconds

We know that we can be able to find the time taken by the use of the equations of motion. The equations of motion can be obtained using the rules of kinematics.

Now we can say that;

speed = distance /time

speed =  164.4 km/hr

distance = 19.3 m

To convert 164.4 km/hr to m/s;

164.4 km/hr * 1000/3600

= 45.7 m/s

Then;

time = distance/speed

time = 19.3 m/45.7 m/s

= 0.42 seconds

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It takes 0.42 s for  ball take to reach home plate 19.3 m away

Speed is the distance travelled by a body per time taken. It is a scalar quantity. The S.I unit is meter per second. That is, m/s

Given that Boston Red Sox pitcher Roger Clemens could routinely throw a fastball at a horizontal speed of 164.4 km/hr. How long did the ball take to reach home plate 19.3 m away?

Since the ball is thrown horizontally, The speed = distance ÷ time

First convert the speed in Km/h to m/s by dividing 164.4 by 3.6

Speed = 164.4 ÷ 3.6

Speed = 45.67 m/s

Substitute all the parameters

45.67 = 19.3 / t

Make time the subject of formula

t = 19.3 / 45.67

t = 0.42 seconds

Therefore, it takes 0.42 s for  ball take to reach home plate 19.3 m away

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W = (mg dx) is the integral expression for the gravitational force's work. The expression for how much work is done is W = mg(b - a). The speed of the satellite when it gets back to point an is v = √(2g(a - x)).

Part 1:

To compose the energy expression for the work done by the gravitational power, we coordinate the power over the separation from x = a to x = b.

W = ∫(F dx) = ∫(mg dx)

Section 2:

Incorporating the phrase:

W = ∫(mg dx) = mgx + C

where C is constant in joining.

Part 3:

In the event that the satellite is let out of rest at point a, its underlying speed is zero. It acquires kinetic energy as it falls under the influence of gravity. Whenever it gets back to point A, all the acquired potential energy is switched over completely to motor energy.

At point a, the potential energy is mgh, where h is the range from the planet's surface.

At point a, the dynamic energy is given by \((1/2)mv^{2}\), where v is the speed.

Since energy is saved, we can compare the expected energy at point a to the dynamic energy at point a:

\(mgh = (1/2)mv^{2}\)

Improving, we get:

\(gh = (1/2)v^{2}\\v^{2} = 2gh\)

v = √(2gh)

Subbing the expression for h concerning x:

v = √(2g(a - x))

In this way, when the satellite re-visitations of point a, its speed will be v = √(2g(a - x)) m/s.

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Answer:

Explanation:

Magnetic field due to current carrying wire at a distance r from the  wire is

\(B=\frac{\mu_0I}{2r}---(1)\)

In our case

\(I=\frac{I_0}{2}\)

where,

I₀ = max current or peak current

and r = h (where h is the height of power line)

\(\therefore B=\frac{\mu (I_0/2)}{2h} \\\\=\frac{\mu_0 I_0}{4h} ----(2)\)

put

h ≈ 370m

I₀ ≈ 3KA

\(B= \frac{(1.26*10^-^6)(3*10^3)}{4*(370)} \\\\=2.5*10^-^6 T\)

Answer:

A Pulse Wave is a short, non periodic, wave formed by a single input of energy rather than a continuous or repeated input of energy.

Explanation:

A pulse wave or pulse train is a kind of non-sinusoidal waveform that includes square waves and similarly periodic but asymmetrical waves. It is a term is used in synthesizer programming, and is a typical waveform available on many synthesizers.

Let's see

Use snells law

\(\\ \rm\Rrightarrow \dfrac{n_1}{n_2}=\dfrac{sini}{sinr}\)

\(\\ \rm\Rrightarrow \mu=\dfrac{sin30}{sin19.9}\)

\(\\ \rm\Rrightarrow \mu=0.5/0.34\)

\(\\ \rm\Rrightarrow \mu=1.47\)

It may be glass

The strength of the magnetic field at the center of the solenoid is 0.006 T

The strength of the magnetic field at the center of a solenoid is given by:

B = μ₀ * n * I

where B is the magnetic field strength, μ₀ is the permeability of free space, n is the number of turns per unit length of the solenoid, and I is the current flowing through the solenoid.

In this case, the length of the solenoid is not given, but we can assume that it is much greater than the diameter of the solenoid, so we can treat it as a long solenoid. The number of turns per unit length is given as 200 loops divided by the length of 6.5 cm, or:

n = 200 / 0.065 m = 3076.92 turns/m

The current flowing through the solenoid is 5 A.

The permeability of free space, μ₀, is a constant with a value of 4π x 10^-7 T m/A.

Therefore, the magnetic field strength at the center of the solenoid is:

B = μ₀ * n * I

= 4π x 10^-7 T m/A * 3076.92 turns/m * 5 A

= 0.006 T

So the strength of the magnetic field at the center of the solenoid is 0.006 T. The north pole of the solenoid is the end from which the magnetic field emerges, and the south pole is the end where it enters.

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Answer:

3rd law of motion

Explanation:

third law of motion because when ever force is applied on a body equal and opposite force will be applied by the body

The salt concentration in the intravenous saline drip is 8.0 kg/m³.

The salt concentration in the intravenous saline drip is 8.0 kg/m³. To convert the salt concentration from g/L to kg/m³, we need to consider the units and make the appropriate conversions. Given that 1 mL (or 1 cm³) of water has the same volume as 1 cm³, we can use this equivalence to establish a relationship between mL and L:
1 L = 1000 mL
Now, let's convert the given concentration of 8.0 g of sodium chloride per liter to kg/m³:
First, we convert grams (g) to kilograms (kg): 8.0 g = 8.0 x 10^(-3) kg

Next, we convert liters (L) to cubic meters (m³):

1 L = 1 x 10^(-3) m³

Now, we can calculate the salt concentration in kg/m³:

Salt Concentration = (8.0 x 10^(-3) kg) / (1 x 10^(-3) m³) = 8.0 kg/m³

Therefore, the salt concentration in the intravenous saline drip is 8.0 kg/m³.

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The step-up transformers are used in the transmission of electrical energy in the way they increase the voltage for efficient long-distance transmission.

A transformer transfers electric energy from one AC circuit to one or more other circuits, either stepping up or stepping down the voltage.

In step up transformers, the voltage are increased from low to high. Step ups are used of long distance transmission In step down transformers, the voltage is decreased from high to low based on the purpose.

Thus, they increase the voltage for efficient long-distance transmission.

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The increase in the internal energy of neon can be calculated using the equation: ΔU = (3/2)nRΔT, where ΔU is the change in internal energy, n is the number of moles of neon, R is the gas constant, and ΔT is the change in temperature. The increase in the internal energy of neon is 1,586,394 J (or 1.59 MJ).

To use this equation, we first need to determine the number of moles of neon in the tank. This can be calculated using the ideal gas law:
PV = nRT
where P is the absolute pressure, V is the volume, and T is the temperature. Rearranging this equation, we get:
n = PV/RT
Substituting the given values, we get:
n = (1.01×10^5 Pa)(653 m^3)/(8.31 J/mol·K)(293.2 K) = 2,017.6 moles
Now we can calculate the increase in internal energy:
ΔU = (3/2)(2,017.6 moles)(8.31 J/mol·K)(295.1 K - 293.2 K) = 1,586,394 J

Therefore, the increase in the internal energy of neon is 1,586,394 J (or 1.59 MJ).

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Based on scientific facts the layer of the atmosphere where short-wave radio signals be reflected is the Thermosphere.

The thermosphere is the layer of the Earth's atmosphere that lies just above the mesosphere and under the exosphere. Within this layer of the atmosphere, UV light induces photoionization/photodissociation of molecules, resulting in the formation of ions; the thermosphere consequently makes up the majority of the ionosphere.

The thermosphere is essential for all life on Earth because it shields it from some of the sun's most destructive energy, including x-rays and ultraviolet rays (its shortest wavelengths).

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Answer:

I think it's D

Explanation:

I don't know I just think

Answer:

Center of Gravity is the point in a body where the gravitational force may be taken to act.  Center of Buoyancy is the center of gravity for the volume of water which a hull displaces.

A parking brake select one , can be called an emergency brake because it will always stop you if your brakes fail.

Break means to cause something to separate into pieces, either by violently hitting it or dropping it. Brake refers to a device used to reduce the speed of a moving vehicle or to stop it by pressing it.

Just below the steering wheel, you'll generally find two pedals. The brake pedal is on the left side regardless of whether it is a left or right-hand drive car. You have to depress the brake to slow down or bring your car to a halt.

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The two major lines of evidence that support the Big Bang theory and have not been successfully explained by alternative models are:

The existence and specific characteristics of the observed cosmic microwave background (CMB): The CMB is a form of radiation that fills the entire universe and is believed to be the leftover heat from the early universe when it was hot and dense. The Big Bang theory predicts the existence of the CMB and its specific characteristics, such as its uniformity and specific temperature fluctuations, which have been observed and confirmed through various experiments.

The observed overall chemical composition of the universe: The Big Bang theory predicts that the early universe was primarily composed of hydrogen and helium, with trace amounts of other elements. Observations of the chemical composition of the universe have confirmed this prediction and provide strong support for the Big Bang theory.

The other options provided in the question are not accurate as they do not represent the two major lines of evidence that support the Big Bang theory. The expansion of the universe is actually a consequence of the Big Bang theory, rather than evidence for it. The observed ratio of spiral to elliptical galaxies is not a major line of evidence for the Big Bang theory. The episode of inflation and separation of gravity from other forces are both aspects of the Big Bang theory itself and not independent lines of evidence supporting it. Lastly, the statement "the early universe was hot and dense" is a prediction of the Big Bang theory and not a line of evidence supporting it.

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The direction of the torque is along the positive y-axis since the torque vector is <0, 54, 0>.

The magnitude and the direction of the torque about the origin on a plum located at coordinates (-4 m, 0 m, 6 m) due to the force F with a component Fx = 9 N can be calculated by using the torque formula:

Torque = r x F

where r is the position vector of the plum and F is the force vector. In this case, r = <-4, 0, 6> and F = <9, 0, 0>.

To find the torque, we can use the cross-product of the two vectors:

Torque = <-4, 0, 6> x <9, 0, 0>
Torque = <0, (6)(9), 0> = <0, 54, 0>

The magnitude of the torque is the length of the torque vector:

Magnitude = sqrt((0)^2 + (54)^2 + (0)^2) = 54 Nm

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