fe2(co3)3 number of atoms​

Answer:

the atom number

Explanation:

atoms are determend by the numbers of protons in their core, as the number of protons determines what type of element the atom will be (noble gasses, Alkali Metals, Other Metals) and the atom number involves both protons and neutrons

Also spelling may be bad, as Grammarly dosen't work with brainly at all. and if its right brainlist plz (´～｀ヾ)

Answer:

The atomic number

Answer:

A mixture has particles that cannot be seen but do reflect light. It should be classified as a colloid. A colloid is a mixture in which one substance is suspended throughout another substance.

Explanation:

Answer:

a)  Q₀ = Q = 4.27 10² pC,  b) C = 1.26 10⁻¹⁰ F,  ΔV = 3.375 V, c) ΔE = 56.88  nJ

Explanation:

a) the capacitance of a parallel plate capacitor is

        C = ε₀ A / d

let's reduce the magnitudes to the SI system

        d = 1.40 cm = 0.0140 m

        A = 25.0 cm² (1 m / 100 cm) ² = 25.0 10⁻⁴ m²

         C = 8.85 10⁻¹² 25.0 10⁻⁴ / 0.0140

         C = 1.58 10⁻¹² F

the capacitance is also

          C = Q / ΔV

          Q = V ΔV

          Q = 270  1.58 10⁻¹²

          Q = 4.27 10⁻¹⁰ C

When the battery is removed and the capacitor is inserted into the dielectric, the charge should remain the same,

           Q₀ = Q = 4.27 10⁻¹⁰ C

let's reduce to pC

           Q₀ = 4.27 10⁻¹⁰ C (10¹² pC / 1C)

           Q₀ = Q = 4.27 10² pC

b) After being immersed in the fluid of constant k = 80.0

capacitance is

            C = k Co

            C = 80 1.58 10⁻¹²

            C = 1.26 10⁻¹⁰ F

the voltage difference is

            ΔV = ΔV₀ / k

            ΔV = 270/80

            ΔV = 3.375 V

c) We stop the energy before the dive

             E₀ = ½ C₀ ΔV₀²

after the dive

              E = ½ (k C₀) (ΔV₀/k)²

              E = ½ C₀ ΔV₀² / k

              E = E₀ / k

the change in energy is

            ΔE = E -E₀

            ΔE = E₀ / k - E₀

            ΔE = E₀ ( \(\frac{1}{k} - 1\) )

we calculate

             E₀ = ½ 1.58 10⁻¹² 270²

             E₀ = 5.76 10⁻⁸ J

             ΔE = 5.76 10⁻⁸ (\(\frac{1}{80} -1\))

             ΔE = 5.688 10⁻⁸ J

we reduce to nJ

             ΔE = 5.688 10⁻⁸ J (10⁹ nJ / 1J)

             ΔE = 56.88  nJ

Answer:

Explanation:

Sure, I'd be happy to help you with the question!

Let's denote the input as x. According to the function machine, the input is multiplied by 6 and then 80 is subtracted from the result to obtain the output.

So, the function can be written as:

Output = (6 * x) - 80

Now, the problem states that the input is the same as the output. Therefore, we can set up the equation:

x = (6 * x) - 80

Let's solve this equation to find the value of x:

x = 6x - 80

Subtracting 6x from both sides, we get:

x - 6x = -80

Combining like terms, we have:

-5x = -80

Dividing both sides by -5, we find:

x = (-80) / (-5)

Simplifying the expression, we have:

x = 16

Therefore, the input (x) that results in the input being the same as the output is 16.

To work out these types of questions, it's important to carefully read the instructions and understand the operations being performed in the function machine. Then, you can set up an equation with the input and output, and solve for the unknown value. Always double-check your solution to ensure it satisfies the given conditions of the problem.

Answer:

16

Explanation:

(x*6) - 80 = x

Multiply the parentheses

6x - 80 = x
Add 80 to each side to get
6x = x + 80
Subtract x from both sides to get
5x = 80
Divide both sides by 5
x = 16

The boat will arrive 2.5 meter in east far from a point directly north on the other side of the river.

The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction.

A boat has a speed of 20m/s in still waters.

The velocity of river is 5m/s in east.

The width of the river is = 10 meter.

Hence, time taken by the board to cross the river = 10/20 second

= 0.5 second.

In this time, the board will move in east direction   = 5×0.5 meter = 2.5 meter.

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Mechanical energy → Electrical energy → Thermal energy

What is mechanical energy?

Mechanical energy is the energy possessed by an object due to its motion or position. It is the sum of kinetic energy and potential energy of an object, which can be converted to other forms of energy, such as electrical energy or thermal energy.

What is electrical energy?

Electrical energy is the energy associated with the movement of electrons through a conductor or an electrical circuit. It is the result of the movement of charged particles, such as electrons, and is commonly generated by the conversion of other forms of energy, such as mechanical, chemical, or solar energy.

What is thermal energy?

Thermal energy is the energy associated with the temperature of an object or a system. It is the result of the movement of atoms and molecules in matter, which leads to the transfer of heat from hotter to cooler objects. Thermal energy is commonly measured in units of joules or calories and is proportional to the mass and temperature of an object or a system.

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Answer   Unit of Buoyant Force The unit of the buoyant force is the Newton (N). = Here, F= buoyant force

Explanation:

i hope this helpes

According to the question the tension in each wire is 1.96 N.

Tension is a term that describes the psychological and physical state of a person or system in which there is a high degree of stress, uncertainty, and anxiety. It is often associated with conflict and is often experienced when individuals or groups feel threatened or constrained in some way. Tension can be experienced in a variety of different contexts, from interpersonal relationships to the workplace. It can result from a variety of different factors, including a lack of communication, conflicting goals or expectations, and unmet needs.

The body is in equilibrium when the sum of all forces acting on it is equal to zero. In this case, the forces acting on the metal tube are the two wires and the weight of the tube due to gravity.

The tension in each wire is equal to the weight of the tube divided by the length of the tube. This is because the tube is suspended horizontally, so the forces in each wire must be equal in order to keep the tube in equilibrium.

Therefore, the tension in each wire is:

T = (9 kg × 9.8 m/s2) / (5 cm × 0.01 m)

= 1.96 N

Therefore, the tension in each wire is 1.96 N.

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The two rivers' drops' different amounts of energy are as follows:

Given are identical-height dips in two different rivers. There is a waterfall in this section of river A. There is a hydroelectric dam on this section of river B. The potential energy of the water is now transformed into kinetic energy as it falls, with the kinetic energy peaking at the waterfall's base.

Therefore, river A would have greater water kinetic energy than river B at the bottom of the descent. Similar to how, because the river's velocity is zero at that point, the top of the drop in river A has less kinetic energy than the top of the drop in river B

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In order to convert the maximum speed to miles per hour, we must follow a series of steps, which will lead us to the conclusion that 360 km/h is equal to 223.7 miles per hour.

For this, we only really have to make one conversion. Since both metrics will be using hours as the denominator, that can remain unchanged. Therefore, we must only convert the kilometers into miles. To do this, we use the conversion metric which is that one mile is equal to 1.6 kilometers. So we can take 360 and divide that by 1.6 to reach our answer of 223.7 miles.

Therefore, through using the metrics for converting kilometers into miles, we can confirm that 360 km/h is equal to 223.7 miles per hour.

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Answer:

0.636 kJ

Explanation:

The charge on any capacity, q = CV, thus,

The initial charge on the 70 pF capacitor is

q = Cv

q = 70*10^-12 * 3.6*10^3

q = 2.52*10^-7 C

The charge on the 280 pF capacitor is q = C*v

q = 280*10^-12 * 3.6*10^3

q = 1.008x10^-6 C

When they are connected as stated, the net total charge remaining will be 1.008*10^-6 - 2.52*10^-7 = 7.56*10^-7 C

Since the capacitors are in parallel, the equivalent capacitance will be 70 + 280 pF = 350 pF

Remember, q = CV, then V = q/C

V = 7.56*10^-7 C / 350*10^12 F

V = 2160 V

b) The energy before is 1/2 C*v²

E = 1/2 * 70*10^-12 * 3600² + 1/2 * 280*10^-12 * 3600²

E = 4.536*10^-4 J + 1.814*10^-3 J

E = 2.268 kJ

The energy After is 1/2 Cv²

E = 1/2 * 70*10^-12 * 2160² + 1/2 * 280*10^-12 * 2160²

E = 3.266*10^-4 J + 1.306*10^-3 J

E = 1.632 kJ

so the loss is 2.268 - 1.632 = 0.636 kJ

Answer:

37.4m/s

Explanation:

since the car doesn't accelerate, we can use the formula v=ωr where v is linear speed, ω is angular speed (rads/second) and r is radius. Substitute values for equation:

v=55*0.68

v=37.40

The time of flight is 2.57 s

The maximum height is 8.12 m

Projectile motion refers to the motion of an object that is launched into the air and then moves under the influence of gravity. A projectile is any object that is given an initial velocity and then moves freely under the influence of gravity, without any additional propulsion or guidance.

For the time of flight;

T = 2u sinθ/g

T = 2 * 22 * sin35/9.8

T  = 2.57 s

Then the maximum height is;

H = u^2sin^2θ/2g

H = (22)^2 (sin 35)^2/2 * 9.8

H = 8.12 m

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Answer:

A. mass

Explanation:

Mass determines the quantity of inertia for an object. Mass is the quantity that depends upon the inertia of an object. The inertia that an object has is directly proportional to the mass of the object.

An object that has more mass has a greater tendency as compared to the object that has less mass to resist changes in its state of motion.

Answer: no

Explanation:

The missing piece for the energy transformation for a flashlight is "Light" or "Radiant" energy. Chemical > Electrical > light & Thermal

Energy transformation is also known as energy conversion. It is the process of changing energy from one form to another. In physics, energy is a quantity that provides capacity to perform work or moving or provides heat.

The complete energy transformation for a flashlight is as :

Chemical (stored in the battery) > Electrical (when the battery powers the bulb) > Light/Radiant (when the bulb emits light) & Thermal (some of the energy is lost as heat due to resistance in the bulb and the circuit).

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Answer:

Therefore The hypothesis is not plausible Because

\(P.E \geq P.E_e\)

\(P.E=12.435*10^{-5}J \geq 1.4*10^{-7}J\)

Explanation:

From the question we are told that:

Mass \(M=0.45mg\)

Jump height \(h=3.5cm \approx 0.03m\)

Percentage strain \(\mu =100\%\)

Generally the equation for potential energy is mathematically given by

\(P.E=mgh\)

\(P.E=0.45*10^{-3}*9.8*0.03\)

\(P.E=12.435*10^{-5}J\)

Generally the equation for Elastic potential energy is mathematically given by

\(P.E_e=0.5*stress*strain *volume\)

\(P.E_e=0.5*1*2*10^6*1*1.4*10^{-4*(10^-3)^3}\)

\(P.E_e=1.4*10^{-7}J\)

The hypothesis is only plausible at conditions where

\(P.E\leq P.E_e\)

Therefore The hypothesis is not plausible Because

\(P.E \geq P.E_e\)

\(P.E=12.435*10^{-5}J \geq 1.4*10^{-7}J\)

Lower frequencies (red) move faster in a glass prism than higher frequencies.

Light of all colors moves at the same speed in a vacuum. However, light travels at different speeds in many media, including water.

Red light moves through glass at the fastest speed, whereas violet light moves at the slowest speed.

Red light bends the least of all the colors because it moves at the fastest speed, whereas violet light moves at the slowest speed and bends the most.

Wavelength and speed are directly proportional. Speed also rises with increasing wavelength. Light that has a maximal wavelength therefore moves at its fastest.

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Answer: No.

Explanation:

Radiometer dating is used on igneous rocks.

Unlike the other two rock types, sedimentary annd metamorphisis, all igneous rocks possess one specific age/ time of origin.

Answer:

egocentric

Explanation:

Explanation:

P=E/T

E=15N

T=2s

P=15/2

P=7.5

If one ball is dropped at rest from a height of h = 65 m.  The acceleration of the two balls is: -9.8 m/s^2 for both balls.

Let's start by finding the time it takes for the two balls to meet. We know that the ball thrown upward starts from rest, so its initial velocity is 0 m/s. We can use the following kinematic equation:

y = v_i*t + (1/2)at^2

where y is the displacement (in this case, it is the distance between the two balls), v_i is the initial velocity, a is the acceleration, and t is the time. We can set y equal to the initial height of the dropped ball, which is h = 65 m. For the ball thrown upward, the initial position is y = 0.

For the dropped ball:

y = h = 65 m

v_i = 0 m/s

For the ball thrown upward:

y = 0

v_i = 0 m/s

Using the given information, we can solve for t:

h = (1/2)at^2

65 m = (1/2)*(-9.8 m/s^2)t^2

t = sqrt(65 m / (1/2(-9.8 m/s^2))) ≈ 3.64 s

So it takes about 3.64 seconds for the two balls to meet.

Now, we can find the acceleration of the two balls. For the dropped ball, the acceleration is simply the acceleration due to gravity, which is -9.8 m/s^2. For the ball thrown upward, the acceleration is also the acceleration due to gravity, but with a negative sign since it is moving in the opposite direction of gravity. Therefore, the acceleration of the two balls is:

a = -9.8 m/s^2 for both balls

This means that both balls experience the same acceleration due to gravity, regardless of their initial velocities.

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Since no work is done, the power exerted is zero. Therefore, the man exerts no power on the wall.

In physics, force is defined as any action that can change the motion of an object or cause an object to accelerate. Force is a vector quantity, meaning that it has both magnitude (size or strength) and direction. The unit of force in the International System of Units (SI) is the Newton (N), which is defined as the amount of force required to accelerate a mass of one kilogram at a rate of one meter per second squared (1 N = 1 kg × 1 m/s^2). Force can be measured using a variety of instruments, such as spring scales, strain gauges, or force plates. Some common types of forces include gravitational force, electromagnetic force, frictional force, and normal force. The study of forces and their effects on the motion of objects is known as mechanics and is a fundamental concept in physics.

Here,

a. The man does not do any work on the wall because the wall does not move. Work is only done when there is a displacement in the direction of the force applied.

b. Since no work is done, no energy is used or transferred.

c. The power exerted by the man can be calculated using the formula:

Power = Work / Time

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If the DMV closed and we let private companies offer their own driver licenses on the free market then the competition in the market will increase.

If the DMV (Department of Motor Vehicles) were to close and private companies were allowed to offer their own driver licenses on the free market, then private companies are competing to offer the best driver's licenses, they may innovate, run more efficiently, and offer better customer service.

As a result, license application processes might become simpler, quicker, and perhaps even less expensive.

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Answer:

a)   m =1  θ = sin⁻¹  λ  / d,  m = 2        θ = sin⁻¹ ( λ  / 2d) ,   c)     m = 3

Explanation:

a) In the interference phenomenon the maxima are given by the expression

         d sin θ = m λ

the maximum for m = 1 is at the angle

          θ = sin⁻¹  λ  / d

the second maximum m = 2

          θ = sin⁻¹ ( λ  / 2d)

the third maximum m = 3

        θ = sin⁻¹ ( λ  / 3d)

the fourth maximum m = 4

       θ = sin⁻¹ ( λ  / 4d)

b) If we take into account the effect of diffraction, the intensity of the maximums is modulated by the envelope of the diffraction of each slit.

       I = I₀ cos² (Ф) (sin x / x)²

       Ф = π d sin θ /λ

       x = pi a sin θ /λ

where a is the width of the slits

with the values ​​of part a are introduced in the expression and we can calculate intensity of each maximum

c) The interference phenomenon gives us maximums of equal intensity and is modulated by the diffraction phenomenon that presents a minimum, when the interference reaches this minimum and is no longer present

maximum interference       d sin θ = m λ

first diffraction minimum    a sin θ = λ

we divide the two expressions

                       d / a = m

In our case

                   3a / a = m

                    m = 3

order three is no longer visible

(a)  The next four angles from the central maxima are sin⁻¹  λ  / d, sin⁻¹  λ  / 2d , sin⁻¹  λ  / 3d, and sin⁻¹  λ  / 4d respectively.

(b)   With the values ​​of part a are the expression of intensity of each maximum can be calculated accordingly.

(c)   The third order maxima (m = 3) is missing from the pattern obtained through the double-slit experiment.

a)

In the interference phenomenon the maxima are given by the expression

d sin θ = m λ

Here,

d is the slit separation and m is the order of interference.

The maximum for m = 1 is at the angle is,

θ = sin⁻¹  λ  / d

For the second maximum m = 2

θ = sin⁻¹ ( λ  / 2d)

For the third maximum m = 3

θ = sin⁻¹ ( λ  / 3d)

For the fourth maximum m = 4

θ = sin⁻¹ ( λ  / 4d)

Thus, we can conclude that the next four angles from the central maxima are sin⁻¹  λ  / d, sin⁻¹  λ  / 2d , sin⁻¹  λ  / 3d, and sin⁻¹  λ  / 4d respectively.

b)

Considering the effect of diffraction, the intensity of the maximums is modulated by the envelope of the diffraction of each slit.

I = I₀ cos² (Ф) (sin x / x)²

Where Ф is the phase angle, and its value is,

 Ф = π d sin θ /λ

x = π  a sin θ /λ

Here a is the width of the slits

Thus, with the values ​​of part a are introduced in the expression the  intensity of each maximum can be calculated accordingly.

c)

The interference phenomenon gives us maximums of equal intensity and is modulated by the diffraction phenomenon that presents a minimum, when the interference reaches this minimum and is no longer present.

For the maximum interference:        

d sin θ = m λ

For the first diffraction minimum:    

a sin θ = λ

Dividing both the expressions as,

d / a = m

Since, d = 3a. Then,

3a / a = m

m = 3

Thus, we can conclude that the third order maxima (m = 3) is missing from the pattern obtained through the double-slit experiment.

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The coefficient of thermal conductivity (k) is related to the rate of heat flow (Q), the cross-sectional area (A), the length (L), the temperature difference (ΔT), and the thermal resistance (Rth) by the following equation:

k = Q / (A * ΔT * L) = Rth * (A * ΔT)

Reorganizing this equation gives:

Rth = k / (A * ΔT)

The given information in the problem is:

Rate of heat flow (Q) = 14.0 watts

Thermal resistance (Rth) = (350 mm × 350 mm × 15 mm) / (14.0 watts) = 31.5 mm⁴/C

Temperature difference (ΔT) = 28°C

Substituting these values into the equation, we have:

k = Q / (A * ΔT) = 14.0 W / (0.35 m² * 28°C) = 1.94 W/mK

So the coefficient of thermal conductivity (k) for this wood is approximately 1.94 W/mK.

8.27 x 1013 meres is the orbital radius.

Jupiter's mass, 1.9 x 1027 kg, and the time interval, 16.9 days, are equal to 1.46 x 106 seconds. The radius is needed, thus r. Solution

The moon must be held in its orbit by a gravitational force equal to the centripetal force between Jupiter and the moon.

6.67 x 10⁻¹¹ N/m²kg

2 x 1.9 x 10/27 x 1.46 x 10'6 / 4 r = 6.85 x 102'7 G = 6.67 x 10'11 N/m2kg2 r = 8.27 x 10'7

The second-largest moon in Jupiter's orbit and the third-largest moon in the solar system is called Callisto. Of all the objects in our solar system, its surface has the most craters.

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Answer:

onsider a pulse moving through a medium - perhaps through a rope or a slinky. What happens to the pulse when it reaches the end of that medium? The answer depends on whether the medium is fixed in space or free to move at its end. For example, if the pulse is moving through a rope and the end of the rope is held firmly by a person, then it could be said that the pulse is approaching a fixed end. On the other hand, if the end of the rope is lying on the floor such that it is free to move up or down when the pulse reaches its end, then it could be said that the pulse is approaching a free end.The animation below depicts a pulse moving through a medium which is fixed at its end.

Explanation:

In the parallel combination, the current through R3 is 3 A. In the series combination, the current through R3 is 0.75 A.

To determine the current through resistor R3 in both the parallel and series combinations, we need to apply Ohm's Law and the appropriate formulas for calculating total resistance and current in each configuration.

First, let's consider the parallel combination:

In a parallel combination, the voltage across each resistor is the same. Therefore, the voltage across R3 is also 90 V.

Using Ohm's Law (V = I × R), we can calculate the current flowing through R3 in the parallel combination:

I_parallel = V / R3

= 90 V / 30 Ω

= 3 A

So, in the parallel combination, the current through R3 is 3 A.

Now, let's consider the series combination:

In a series combination, the total resistance is the sum of the individual resistances:

R_total = R1 + R2 + R3

= 60 Ω + 30 Ω + 30 Ω

= 120 Ω

To find the current through the series combination, we can use Ohm's Law:

I_series = V / R_total

= 90 V / 120 Ω

= 0.75 A

Therefore, in the series combination, the current through R3 is 0.75 A.

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Note the complete questions is User

90 V R₁=60 R2=  30, R3 = 30

Based on the circuit above, what would be the current through the R3 resistor in parallel and in series combinantion.