Calculate the equilibrium electron concentration in silicon at t = 300 \: k t=300k with donor densit

Answer:

4 is the answer

Explanation:

hope this helps

Your answer to your question is 4...

Given that the radius of the circular path is r = 142 m and the coefficient of the friction is

The condition for the car to travel safely is

Frictional force = centrifugal force

Here, m is the mass of the car and the acceleration due to gravity is g = 9.8 m/s^2.

v is the maximum speed of the car.

Answer:

Cracking of an egg is a physical change since the egg and the stuff inside does not change but the shape or appearance of the shell changes.

Explanation:

Hope it helps

Given,

The current, I=0.25 A

The total charge flowing in the circuit is q=6812 C.

The electric current can be defined as the time rate of flow of the charges.

Thus, the electric current is given by,

Where t is the time duration.

Thus the batteries will fry out after 27248 s

According to APICS (Association for Supply Chain Management), the record accuracy for A items should ideally be at least 95-99%. A items are considered high-priority inventory items that require close management and accurate record keeping due to their significant impact on the company's financial performance and overall supply chain efficiency.

The APICS (The Association for Operations Management) recommends that item records be accurate to within.98%. This indicates that a minimum of 98% accuracy is required for the physical inventory count to match the recorded inventory count. In order to effectively manage your inventory, cut down on waste, and prevent stockouts or overstocking, you must achieve high record accuracy.

According to APICS (The Association for Operations Management), the record accuracy for items should be at least 98%. This means that the physical inventory count should match the recorded inventory count at a minimum of 98% accuracy. Achieving high record accuracy is essential for effective inventory management, reducing waste, and avoiding stockouts or overstocking.

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Lighter molecules move fast and escape from the upper atmosphere relatively quickly.

To find the answer, we have to know more about the lighter isotopes.

Thus, we can conclude that, lighter molecules move fast and escape from the upper atmosphere relatively quickly.

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Answer:

hydrochlorine +12÷B to the power of 4 -× y reapeated zminus 2 to the power of 9

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

density = 0.17 g/cm³

1 mL = 1 cm³

12 mL = 12 cm³

So we have

mass = 0.17 × 12

We have the final answer as

Hope this helps you

To find the current flow in a series circuit with a total resistance of 180 ω and a total voltage of 120 V, we can use Ohm's law,(Ohm’s law states the relationship between electric current and potential difference. The current that flows through most conductors is directly proportional to the voltage applied to it. Georg Simon Ohm, a German physicist was the first to verify Ohm’s law experimentally.)

which states that current (I) equals voltage (V) divided by resistance (R), or

I = V/R. Therefore, the current flow in this circuit would be:

I = 120V/180Ohm

I = 0.67 amperes (A)

So, the current flow in this series circuit is 0.67 A.

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Answer:

Friction is another force that energy gets "wasted" on in the dragging. Therefore, the machine gives you less mechanical advantage when too much friction is involved because it wastes energy. It also makes it less efficient!

Answer:

Frequency

Explanation:

The Frequency of a wave is the number of waves produced by a source each second

The speed of the marble when it hits the floor is 5.05 m/s .

The speed of the marble as it reaches the floor may be computed using the equation \(v^2=2as\), which says that an object's velocity is equal to its acceleration due to gravity multiplied by its fall distance. The acceleration due to gravity(a) in this scenario is \(9.8\) \(m/s^{2}\)and the marble has fallen from a distance(d) of 1.3 \(m\).

putting the values in the equation, we get:

\(v^{2} = 2\) × \(9.8\) × \(1.3\)

\(v^{2} = 25.48\)

\(v =\sqrt{25.48}\)

\(v = 5.05\) m/s

This equation assumes that the marble is falling in a straight path and is not influenced by other influences such as air resistance. This means the marble will move in a parabolic route with constant acceleration. It is also worth noting that the speed of the stone as it reaches the floor does not account for the 2.5 m horizontal distance traveled. Because gravity only impacts the vertical direction, the horizontal distance has no effect on the pace at which the marble descends.

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The magnitude of the electric field is 1.77 x 10⁶ N/C, under the condition that the  distance is  25.00 cm

The electric field at a distance of 25 cm from the axis of the cylinder can be calculated using Gauss's law. The electric field at a point outside a uniformly charged cylinder is given by

E = (ρ × r) / (2 × ε0),

here

ρ = charge density,

r = distance from the axis of the cylinder

ε0 = permittivity of free space.

Now, we have a non-uniform volume charge density of

ρ = 4 × r²C/m³

r = 25 cm

= 0.25 m

Staging these values in the above equation

E = (ρ × r) / (2 × ε0) = (4 × r³) / (2 × ε0)

= (2 × r³) / ε0

E = (2 × (0.25 m)³) / ε0

= 1.77 x 10⁶ NN/C

Therefore, the magnitude of the electric field at a distance of 25 cm from the axis of the cylinder is 1.77 x 10⁶ N/C.

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Answer:

\(Q=-38.15kJ\)

Explanation:

From the question we are told that

Piston-cylinder initial Volume of air \(v_1=0.1 m^3\)

Piston-cylinder initial temperature \(T_1=400k\)

Piston-cylinder initial pressure \(P_1= 100kpa\)

Supply line temperature\(T_s=400k\)

Supply line pressure \(P_s= 500kpa\)

Valve  final pressure \(P_v=500kpa\)

Piston movement pressure \(P_m=200kpa\)

Piston-cylinder final Volume of air\(v_2=0.2 m^3\)

Piston-cylinder final temperature \(T_2=440k\)

Piston-cylinder final pressure \(P_2= 500kpa\)

Generally the  equation for conservation of mass is mathematically given by

\(Q=m_2 \mu_2-m_1 \mu_1 +W-(m_2-m_1)h\)

where

Initial moment

\(m_1=\frac{p_1 V_1}{RT_1}\)

\(m_1=\frac{100*0.1}{0.287*400}\)

\(m_1=8.7*10^-^2kg\)

Final moment

\(m_2=\frac{p_2 V_2}{RT_2}\)

\(m_1=\frac{500*0.3}{0.287*440}\)

\(m_1=79*10^{-2}kg\)

Work done by Piston movement pressure

\(W=Pd\)

\(W=P(v_2-v_1)\)

\(W=200(0.2-0.1))\)

\(W=20000J\)

Heat function

\(h=cT_1\)

\(h=1.005(400)\)

\(h=402\)

Therefore

\(Q=(0.792*0.718(440)-0.0871*0.718(400)+20-(0.792-0.087)*402))\)

\(Q=-38.15kJ\)

It is given mathematically that the system lost  or dissipated Heat of

\(Q=-38.15kJ\)

Answer:

D. Sulfur hexafluoride.

Explanation:

Answer:

Density → Mass and Length.

Acceleration → Length and Time.

Force → Mass, Length and Time.

Pressure → Mass, Length and Time.

Work → Mass, Length and Time.

The answer to all the questions is discussed below.

(a)GoKJ is the unit of measurement for specific heat. A high score thus means that it takes more energy to raise (or lower) its temperature. A low number means that heating or cooling something doesn't use a lot of energy.

(b) Calorimeter, a tool for estimating a material's heat capacity and measuring the heat produced during a mechanical, electrical, or chemical reaction. bomb thermometer.

An illustration of a closed system is a calorimeter. It is a sealed container, which means that tests involving the energy transfer between the System and its surroundings are performed inside it. The exchange of energy but not matter is possible in a calorimeter.

(c) Since energy is transferred rather than created or destroyed, the law of conservation of energy is present all around us.

A white precipitate of barium sulphate will appear when the conical flask is tilted to combine the two solutions, indicating that the reaction has taken place.

(d) The specific heat of aluminum is 897 J/kg K. This value is almost 2.3 times the specific heat of copper. You can use this value to estimate the energy required to heat a 500 g of aluminum by 5 °C, i.e., Q = m x Cp x ΔT = 0.5 * 897* 5 = 2242.5 J.

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The correct question is: a. What is a specific heat What does it mean if the specific toat is high? Low? b. What is a calorimeter and what about your up make if a closed system" C. What is the law of conservation of energy and how was it applied in your experiment? d. What is your calculated average specific beat of aluminum and hose does it compare to the literature value of 0.8973 g

∘

C ? Hoth of these values should be stated in the text of your discussion. 5. What is your calculated experimental percent error for the luminary? If your specific beat (c) value does not match exactly the literature value, you need to discuss why your experiment did not yield the exact result you expected. What data point that you measured might be a bet off and why? What art some errors you can account for? f. What major assumption is made regarding the initial temperature of the metal rod? This would be good to mention when discussing possible sources of error. Do not simply state "human error." Describe what types of the human cross 9. Don't forget 10 wine a conclusion that pectates your reality in a clear way (you should re-state your specific beat of the metal rod). Also, include a useful application of specific beat in chemistry and in life. There is no length requirement for a discussion of a hedge as you think all the above points. However. to do so, it usually takes at least it pays Grammar and spelling count 1 won't take off points for a minute mistake but if there are more than 2.3 mistakes in a paragraph, it mems you did not proofread your work. Another person (outside of our lab class) should be able to read and understand a bat you cited and the meaning of your results: If you write your discussion 30 min before our class tame. you will not get a good grade. Please take. the time to write, proofread, make corrections, etc. The soal as to improve your writing skills! if you need belo writing you can take your discuss in to the teaming Center or to me during office hours to get it edited.

A red light means to stop. If you are turning from a two-way road or onto a two-way road, then you are NOT allowed to reverse your car If you can't do it

Red is typically used to indicate danger or warning, and on traffic lights, it indicates a potential hazard ahead and, as a result, serves as a signal for drivers to stop. If the traffic light turns red while you are already at a junction, you must move swiftly to the opposite side to avoid a potential accident with oncoming traffic.
If the traffic light has turned red as you approach the junction and you are just entering it, you must stop. Unless there is a sign clearly telling you not to turn left at the red light, you may do so. Give way to people and cars coming from other directions when turning.

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Answer: you are not allowed to turn left on a red light from a two way to a two way

The speed of the bullet immediately before impact was 361.7 m/s.

The speed of the bullet immediately before impact can be calculated using the law of conservation of momentum and the work-energy theorem.

The impact of the bullet causes the wooden block to move with kinetic energy, which is then dissipated through kinetic friction as it slides to a stop.

The equation for this process is:Initial momentum = Final momentum(12.0 g)(v) = (12.0 g + 98 g)(v')where v is the initial speed of the bullet and v' is the final speed of the block and bullet after impact.

Using the work-energy theorem, we can relate the kinetic energy of the block and bullet to the work done by

kinetic friction:Initial kinetic energy = Work done by kinetic friction(1/2)(12.0 g + 98 g)(v')^2 = (0.650)(12.0 g + 98 g)(9.8 m/s^2)(7.5 m)

Solving for v' and substituting back into the initial momentum equation gives:

(12.0 g)(v) = (12.0 g + 98 g)(√[(0.650)(12.0 g + 98 g)(9.8 m/s^2)(7.5 m)] / (12.0 g + 98 g))v = √[(0.650)(12.0 g + 98 g)(9.8 m/s^2)(7.5 m)] / (12.0 g)v = 361.7 m/s

Therefore, the speed of the bullet immediately before impact was 361.7 m/s.

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Answer: A. 1.0

Explanation:

Answer:

Pb =- Lead    No.  82   Wt 206   N = 206 - 82 = 124   Rat = 124/82 = 1.5`1

U = Uranium No. 92    Wt 238   N = 238 - 92 = 146    Rat = 146/92 = 1.59

3:2 = 1.50        Pb is closer to 3:2

Answer:

Water flowing over a tall cliff

Explanation:

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The particles that move to the center of the atom are the negatively charged electrons.

Force is a push or pull on an object that causes it to accelerate or change its velocity. It is a vector quantity and has both magnitude and direction. Forces can be caused by a variety of factors, such as gravity, electromagnetic interactions, or contact with other objects. In physics, force is described by Newton's second law, which states that the force acting on an object is equal to its mass multiplied by its acceleration (F = m * a).

Here,

Electrons occupy energy levels, or orbits, around the nucleus of the atom. The energy levels are determined by the arrangement of the protons and neutrons in the nucleus and the energy of the electrons. The electrons occupy the lowest energy levels possible, closest to the nucleus.

As a result, the electrons move towards the center of the atom.

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Explanation:

For this problem, use the first law of thermodynamics. The change in energy equals the increase in heat energy minus the work done.

ΔU=Q−W

We are not given a value for work, but we can solve for it using the force and distance. Work is the product of force and displacement.

W=FΔx

W=3N×2m

W=6J

Now that we have the value of work done and the value for heat added, we can solve for the total change in energy.

ΔU=Q−W

ΔU=10J−6J

ΔU=4J

Answer is 4J

i think this may help you very much

Initial speed (u) = 0 m/s (Starts from rest)

Final speed (v) = 280 m/s

Acceleration (a) = 5.6 m/s²

By using equation of motion, we get:

\( \bf \longrightarrow {v}^{2} = {u}^{2} + 2as \\ \\ \rm \longrightarrow {280}^{2} = {0}^{2} + 2 \times 5.6 \times s \\ \\ \rm \longrightarrow 78400 = 11.2s \\ \\ \rm \longrightarrow 11.2s = 78400 \\ \\ \rm \longrightarrow s = \dfrac{78400}{11.2} \\ \\ \rm \longrightarrow s = 7000 \: m \\ \\ \rm \longrightarrow s = 7 \: km\)

\( \therefore \) Distance travelled by the car (s) = 7 km

Answer:

35.28m/s; 63.50m

Explanation:

Given the following data;

Time, t = 3.6 secs

Since it's a free fall, acceleration due to gravity = 9.8m/s²

Initial velocity, u = 0

To find the final velocity, we would use the first equation of motion;

\( V = u + at\)

Substituting into the equation, we have;

\( V = 0 + 9.8 * 3.6\)

V = 35.28m/s

Therefore, the final velocity of the penny is 35.28m/s.

To find the height, we would use the second equation of motion;

\( S = ut + \frac {1}{2}at^{2}\)

Substituting the values into the equation;

\( S = 0(3.6) + \frac {1}{2}*9.8*(3.6)^{2}\)

\( S = 0 + 4.9*12.86\)

\( S = 0.5 *36\)

S = 63.50m

Therefore, the height of the tower is 63.50m.

Answer:

we can incinerate waste materials and use the product as fuel rather than dumping them. It may produce carbon dioxide but we can create a machine that can convert carbon into energy.

Answer:

So the people in the ring don't get hurt or break anything on impact once they hit the floor

Answer:

14,42

Explanation:

Let the smaller number be x

Hence, the larger number = 3x

Hence,

\(3x-x=28\\2x=28\\x=14\)

Hence, the smaller number = x = 14

The larger number = 3x = 42

Answer:

q + d = 50

25q + 10d = 980

Explanation:

The equation that can be employed to determine the number of quarters(q), as well as, dimes(d) that Yodelin has would be:

q + d = 50...(1)

25q + 10d = 980...(2)

Multiplying (1) by 25

25q + 25d = 1250 ...(3)

25q + 10d = 980...(4)

subtracting (4) from (3)

15d = 270

d = 18

q = 50 - 18

    = 32

The system of the equations could be

q + d = 50

25q + 10d = 980

Since Yodelin has fifty quarters and dimes. Their total value is $9.80.

So here the equations be

q + d = 50...(1)

25q + 10d = 980...(2)

Now we have to Multiplying (1) by 25

So,

25q + 25d = 1250 ...(3)

25q + 10d = 980...(4)

Now

subtracting (4) from (3)

15d = 270

d = 18

So,

q = 50 - 18

   = 32

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