Answers
Answer:
Consider an n-type silicon semiconductor at T = 300°K in which Nd = 1016 cm-3 and Na = 0. The intrinsic carrier concentration is assumed to be ni = 1.5 x 1010 cm-3. - Comment Nd >> ni, so that the thermal-equilibrium majority carrier electron concentration is essentially equal to the donor impurity concentration.
Explanation:
Related Questions
What average net force is required to accelerate a 375 kg motorcycle initially at rest to a speed of 25.5 m/s over a distance of 174 m?
Answers
Answer:
700.7N
Explanation:
m = 375
x = 174
v = 25.5
a = ?
\( {v}^{2} = 2ax\)
F = ma
We substitute a
F = m * (v^2 /(2x))
F = 375 * 25.5^2/(2*174)
F = 700.7 N
Average net force is required to accelerate a 375 kg motorcycle initially at rest to a speed of 25.5 m/s over a distance of 174 m is 700.7 N
What is force?The push or pull on a mass-containing item changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.
Given in the question motorcycle of mass, m = 375 kg covers a distance of x = 174 m have initial velocity zero and final velocity, v = 25.5 m/sec then the acceleration a,
\(v^{2} = 2ax\)
\(a= v^{2} / 2x\)
Force required to accelerate,
F = ma
substitute a
F = m * \((v^2 /(2x))\)
F = 375 * \(25.5^2/(2*174)\)
F = 700.7 N
So the average net force required to accelerate motorcycle, F = 700.7 N.
To learn more about force refer to the link:
brainly.com/question/13191643
#SPJ5
If you stand on a bathroom scale, the spring inside the scale compresses 0.50 mm, and it tells you your weight is 700 N.
Part A: Now if you jump on the scale from a height of 1.9 m, what does the scale read at its peak?
Express your answer to two significant figures and include the appropriate units.
Answers
If you jump on the scale from a height of 1.9 m, the scale will read 7160 N at its peak.
What is the reading of the scale?When you jump on the scale, your weight and the force of your impact are both applied to the spring inside the scale. At its peak, the scale will read the sum of these two forces.
To calculate the force of your impact, we can use the principle of conservation of energy. When you jump from a height of 1.9 m, you convert potential energy into kinetic energy, given by:
mgh = (1/2)mv^2
where;
m is your mass, g is the acceleration due to gravity, h is the height you jumped from, v is your velocity just before hitting the scale.Solving for v, we get:
v = √(2gh)
Substituting the values, we get:
v = √(2 x 9.81 m/s^2 x 1.9 m) = 6.46 m/s
Now, the force of your impact on the scale is given by:
F = ma
where;
m is your mass, and a is the acceleration you experience when you hit the scale.Assuming that the duration of the impact is very short, we can use the impulse-momentum theorem, which states that the change in momentum of an object is equal to the impulse applied to it. The impulse is given by:
J = Ft
where;
F is the force you apply to the scale, and t is the duration of the impact.The change in momentum of your body is:
p = mv - 0
where;
v is the velocity just before hitting the scale, and 0 is the velocity just after hitting the scale (assuming that you come to a stop).Since the momentum is conserved, we have:
mv = Ft
Solving for F, we get:
F = mv/t
Substituting the values, we get:
F = (m x 6.46 m/s) / (0.001 s) = 6460 N
Therefore, the scale will read:
700 N + 6460 N = 7160 N
Learn more about reading of a scale here: https://brainly.com/question/12974800
#SPJ1
bernouli’s equation is only for fluids that have :
A- low viscosity, incompressible with turbulent flow
B- high viscosity, compressible and streamline flow
C- low viscosity, compressible and turbulent flow
D- low viscosity, incompressible and streamline flow
E- none of the above
Answers
Answer:Bernoulli developed his principle from observations on liquids, and Bernoulli's equation is valid for ideal fluids: those that are incompressible, irrotational, inviscid, and subjected to conservative forces.
Explanation:
A 30-gram arrow, moving at 60 m/s, hits a stationary 240-gram apple. The arrow passes through the apple, and is measured on the other side, moving at 55 m/s. What is the final velocity of the apple?
Answers
Answer: ouch
Explanation:
27. The number of coils of wire through which a bar magnet is moved is increased. The
amount the needle on the meter is deflected
A. increases
B. decreases
C. shows no change
D. does not move at all
Answers
The amount the needle on the meter is deflected A. increases
This phenomenon can be explained by Faraday's law of electromagnetic induction. According to this law, when a magnetic field (created by the bar magnet) passes through a coil of wire, it induces an electric current in the wire. This induced current generates its own magnetic field, which interacts with the magnetic field of the bar magnet.
The deflection of the meter needle is a result of this induced current. When the number of coils of wire is increased, there is a greater number of wire loops for the magnetic field to pass through. This leads to a stronger induction of electric current, resulting in a larger deflection of the meter needle.
By increasing the number of coils, more magnetic flux is linked with the wire, resulting in a higher induced electromotive force (emf) and a greater current. This increased current produces a stronger magnetic field around the wire, leading to a larger deflection on the meter. Therefore, increasing the number of coils of wire enhances the magnetic field interaction, resulting in an increased deflection of the meter needle. Therefore, Option A is correct.
Know more about Faraday's law here:
https://brainly.com/question/1640558
#SPJ8
How does the orientation of the bar magnet affect the measured magnetic field strength?
Answers
When two magnets are close to each other, the magnets experience a repulsive or attractive force. The magnetic field strength is affected by the orientation of the magnet.
The direction in which the bar magnet obtains its maximum magnetic property is called the orientation of the magnet. The magnetic field strength depends on the orientation of the magnet.
The magnetic field lines emerge from the north pole and end in the south pole. When the two bar magnets of opposite poles face each other, an attractive force will be produced and magnetic field strength increases.
When the bar magnet of the same poles faces each other, repulsive force will produce and magnetic field strength decreases. Hence from the orientation of the bar magnet, the magnetic field strength gets affected.
To learn more about the orientation of bar magnets:
https://brainly.com/question/12784598
#SPJ1
If the instantaneous voltage at a given moment in the circuit RL is V=VmaxSIN(150), then the instantaneous current at the...... same instant I=Imaxsin
Answers
The instantaneous current at the same moment in the RL circuit can be expressed as I = Imaxsin(150), where Imax represents the maximum current.
1. Given that the instantaneous voltage at a specific moment in the RL circuit is V = Vmaxsin(150).
2. We can express the current at the same moment using Ohm's Law, which states that V = IR, where V is voltage, I is current, and R is resistance.
3. In an RL circuit, the resistance is represented by the symbol R, and it is typically associated with the resistance of the wire or any resistors in the circuit.
4. However, the given equation does not explicitly mention resistance.
5. Since we are considering an RL circuit, it suggests the presence of inductance (L) along with resistance (R).
6. In an RL circuit, the voltage across the inductor (VL) can be expressed as VL = L(di/dt), where L is the inductance and di/dt represents the rate of change of current.
7. At any given instant, the total voltage across the circuit (V) can be expressed as the sum of the voltage across the resistor (VR) and the voltage across the inductor (VL).
8. Therefore, V = VR + VL.
9. Since the given equation represents the instantaneous voltage (V), we can deduce that V = VR.
10. By comparing V = VR with Ohm's Law (V = IR), we can conclude that I = Imaxsin(150), where Imax represents the maximum current.
The specific values of Vmax, Imax, and the phase angle have not been provided in the question, so we are working with the general expression.
For more such questions on current, click on:
https://brainly.com/question/1100341
#SPJ8
in a football game, the kicker kicks a football a horizontal distance of 43 yards if the ball lands 3.9 seconds later, what is the balls horizontal velocity
Answers
Answer:
10s
Explanation:
Horizontal velocity is the velocity of an object in an horizontal direction
The ball's horizontal velocity is approximately 33.078 ft./s
Reason:
The known parameter are;
The horizontal distance the footballer kicks the ball, d = 43 yards
The time after which the ball lands, Δt = 3.9 seconds
Required:
To find the velocity of the ball
Solution:
\(Velocity = \dfrac{Distance}{Time} = \dfrac{d}{\Delta t}\)
Therefore;
\(Horizontal \ velocity \ of \ the \ ball, \ v_x= \dfrac{43 \ yard}{3.9 \ seconds} \approx 11.026 \ yd/s\)
The ball's horizontal velocity, vₓ ≈ 11.026 yd/s
1 yard = 3 feet
\(11.026 \ yard = 11.026 \ yard \times \dfrac{3 \ feet}{yard} = 22.078 \ feet\)
The ball's horizontal velocity, vₓ ≈ 33.078 ft./s
Learn more about horizontal velocity here:
https://brainly.com/question/14898646
When a disrupted part of a wetland ecosystem is left alone so that nature can help restore it to what it once was, what are people counting on occurring? explain..
Answers
Answer: When a disrupted part of the ecosystem is left alone so that nature can help restore itself what people are counting on happening is secondary succession
Explanation:
In the blanks below write what the independent variable and the dependent variable would be for each experiment. (what are you testing?) (how are you measuring it?) Independent variable Dependent variables
1. Problem: Does the amount you study a subject affect the scores you get on a test? Independent variable ____did you study_ Dependent variable ___higher test scores_
2. Problem: Does misbehaving in school affect a student’s grades? Independent variable _____________________ Dependent variable _______________________
3. Problem: What gives people more gas; eating beans or cabbage? Independent variable _____________________ Dependent variable _______________________
4. Problem: Can you catch more fish with worms or with shrimp? Independent variable _____________________ Dependent variable _______________________
5. Problem: Does talking to plants help increase their growth? Independent variable _____________________ Dependent variable _______________________ 6. Problem: Does eating breakfast help students perform better in school? Independent variable _____________________ Dependent variable _______________________ 7. Do gerbils or hamsters run faster? Independent variable _____________________ Dependent variable _______________________ 8. Problem: Does eating more candy cause cavities? Independent variable _____________________ Dependent variable _______________________
9. Problem: What diet will allow you to lose the most weight, no sugar or no carbs? Independent variable _____________________ Dependent variable _______________________
10. Problem: What, on average, is larger, a chicken egg or a duck egg? Independent variable _____________________ Dependent variable _______________________
Answers
Answer:
1. independent- if you studied. dependent- test scores
2. independent- behavior of students. dependent-student grades
3. independent- what you eat. dependent- amount of gas
4. independent- which bait you use. dependent- how much fish you catch
5. independent-if you talk to the plants or not. dependent- growth
6. independent- whether you eat breakfast or not. dependent-student performance
7. independent- which animal you test. dependent- speed of the animals
8. independent- how much candy you eat. dependent- cavities or not
9. independent- if you eat no sugar or no carbs. dependent- how much weight you lose
10. independent- which thing you measure. dependent- the measurements
a cyclist rides 6.99 km east, then 11.88 km in a direction 39.84 degrees west of north, then 7.43 km west.A. What is the magnitude of the total displacement, in km?B. What is the direction of the displacement, measured in degrees west of north?
Answers
The magnitude of the total displacement, in km, is 25.3 km, and the direction of the displacement, measured in degrees west of north, is 125.76 degrees.
A. The magnitude of the total displacement, in km, is 25.3 km. This is calculated by using the Pythagorean theorem, where a2 + b2 = c2. The first two legs of the displacement are a and b, where a = 6.99 and b = 11.88. So,
a2 + b2 = 6.992 + 11.882
= 162.42 + 140.24 = 302.66.
The square root of 302.66 is 17.36. The third leg of the displacement is c, where c = 7.43. So, the total displacement is 17.36 + 7.43 = 24.79 km. Rounding to the nearest tenth, the magnitude of the total displacement is 25.3 km.
B. The direction of the displacement, measured in degrees west of north, is 125.76 degrees. This is calculated by using the Law of Cosines, where c2 = a2 + b2 - 2ab cos(C). The sides of the triangle are a = 6.99, b = 11.88, and c = 7.43. The angle C is the direction of the displacement, so we can solve for C in terms of a, b
Learn more about displacement:
https://brainly.com/question/28370322
#SPJ4
If you jump off a 5 m diving platform how long will take you hit the water
Answers
Answer:
t = 1.0s
Explanation:
^d = v_0*t + (1/2)*a*t²
(5m-0m) = 0m/s*t + (.5)(9.81m/s²)*(t)²
5m = (4.905m/s²)*t²
t² = 1.01937s²
t = √1.01937s²
t = 1.0s
The current in the circuit shown is 5.0 A, and the resistor is 2.0 2 What is the potential across the battery?A. 10 VB. 3.0 VO C. 8.0 VOD. 2.5 V
Answers
Given that the current is I = 5 A
The resistance in the circuit is
\(R=\text{ 2 }\Omega\)We have to find the potential across the battery, V.
According to Ohm's law, the potential across the battery will be
\(V=IR\)Substituting the values, the potential will be
\(\begin{gathered} V=5A\times2\Omega \\ =10\text{ V} \end{gathered}\)Thus, option A is correct.
What is the resistance of R1
Answers
Answer:
R1 is the first resistance level. It usually falls above the pivot point and below R2 but there are circumstances (see below) when the pivot point can be above R1. R1 is calculated as part of the Pivot Points calculations that traders use to determine where the market might reverse direction.
Explanation:
Which best describes what happens when light traveling through air enters water at an angle?
It moves along straight lines in air and changes direction when it enters water.
O It moves in a curve in air and moves in straight lines when it enters water.
O It moves along straight lines in air and continues along the same lines when it enters water.
O It moves in a curve in air and continues moving in the same curve when it enters water.
Mark this and return
Save and Exit
Next
Submit
Answers
Answer:
When light traveling through air enters water at an angle, it moves in a curve in air and changes direction when it enters water. This bending of light is known as refraction. The angle at which the light bends depends on the difference in the refractive indices of the two media, which is why the light bends when it enters the denser medium of water.
Why are dust particles more likely to remain in the atmosphere longer and travel farther than sand particles
Answers
Answer:It might seem small, but atmospheric dust is a big deal. Consisting (mostly) of tiny pieces of metal oxides, clays and carbonates, dust is the single largest component of the aerosols in Earth's atmosphere, and it likely has a significant impact on the Earth's climate, as it effects a wide range of phenomena, including from temperatures in the Atlantic Ocean to the rate of snowmelt in the southwestern U.S. Dust may also affect hurricanes, as recent research based on data sets dating back to the 1950s suggests an inverse relationship between dust in the tropical North Atlantic and the number of Atlantic hurricanes during the past several decades.
Explanation:
In a certain lab experiment, a spring gun was placed on a table and fired a steel ball horizontally outward. A student determines that the ball starts 1.0 m above the floor and travels 2.7 m before striking the floor
In a certain lab experiment, a spring gun was placed on a table and fired a steel ball horizontally outward. A student determines that the ball starts 1.0 m above the floor and travels 2.7 m before striking the floor.
(a) Determine the time that the ball is in the air. (2 pts)
(b) Determine the initial velocity of the ball. (2 pts)
Answers
a) The time that the ball is in the air is 0.23 second.
b) The initial horizontal velocity of the ball is 11.74 m/s.
What is velocity?
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.
Vertical height of the point = 1.0 meter.
The horizontal distance travelled by the ball = 2.7 m.
a) The time that the ball is in the air is = √(H/2g)
= √(1.0/2×9.8)
= 0.23 second
b) The initial horizontal velocity of the ball is = 2.7 m/0.23 s
= 11.74 m/s
Learn more about velocity here:
https://brainly.com/question/18084516
#SPJ1
Which has the deer’s image? Why?
Answers
Answer: what ( younger brothers of hers )
Explanation:
K bye
progress of science has not caused any ill effect true or false?
Answers
explain the term tenscopo
Answers
Answer: Here you go, i hope this kinda helps.
Explanation:Disambiguation is just a fancy way of saying "asking clarifying questions".
Watson Assistant replies to user's questions based on a confidence score.
Sometimes the customer's question could be interpreted in two or three different ways.
For example, if you say you'd like to "book a table for 8", the assistant is able to ask a clarifying question:
Did you mean booking a table for 8PM, 8AM, or booking a table for 8 guests?
Watson Assistant will ask the question when its confidence score is divided between a few options to ensure that your customers get exactly the right service they need.
Suppose you have 4 bulbs in a parallel circuit. If you were to add 2 more bulbs in
parallel with these 4, what would happen to the brightness of all the bulbs.
Answers
The correct answer is that the bulb will glow brighter when more bulbs are added in parallel.
How do the current and resistance alter as the number of circuits (bulbs) increases in parallel?The voltage across the paralleled lights will be equal to the battery's voltage, and the current through the light will be determined by V=IR, where R is the filament resistance. The parallel circuit will appear brighter because more current will be taken from a battery into it than a series one would.
When the brightness of the bulb rises, an increase in current can be seen. More light is produced in parallel circuit than by series of lights. Each bulb in a parallel circuit has the same voltage as the whole circuit . The other bulb is unaffected when the first bulb is unscrewed.
Each bulb has its own circuit in a parallel circuit. The circuit's resistance increases when more lights are added. Since each additional circuit provides an additional route for electrons to travel from one end of the circuit to the other, the resistance in the circuit reduces as more bulbs are added.
To know more about 'parallel circuit' related questions
visit- https://brainly.com/question/11409042
#SPJ9
A motorcycle speeds up from 10 m/s to 25 m/s in 5 seconds. What is the
motorcycle's acceleration?
O A. 15 m/s2
O B. -5 m/s2
O C. 3 m/s2
O D. 5 m/s2
Answers
Answer:
C. 3 m/s²
Explanation:
Acceleration is change in velocity over time.
a = Δv / Δt
a = (v − u) / t
a = (25 m/s − 10 m/s) / 5 s
a = 3 m/s²
A system consists of two uncharged metal spheres, each suspended on an insulating string and connected to the other by a thin
conducting wire. A positively charged rod is brought near, but does not touch, the left sphere, and the sphere is attracted to the rod. Which
of the following is correct about the net charge on the right sphere as a result?
Answers
The right sphere will acquire an equal and opposite net positive charge to balance the negative charge on the left sphere.
Electrostatic attractionSince the left sphere is attracted to the positively charged rod, it means that the left sphere acquires a temporary negative charge due to induction.
The positive charge on the rod repels electrons in the left sphere, causing them to move away from the rod side and accumulate on the opposite side, resulting in a net negative charge on the left sphere.
According to the principle of charge conservation, the net charge on the system must remain zero. Therefore, the right sphere acquires an equal and opposite net positive charge to balance the negative charge on the left sphere.
More on electrostatic attraction can be found here: https://brainly.com/question/14889552
#SPJ1
What mathematical relationship between variables is suggested by a graph showing a half-parabola? (2 points)
a
Inverse
b
Linear
c
Quadratic (power)
Answers
Answer:
C.) Quadratic (power)
Explanation: I did the thingy and it worked
its not A or B
Answer:
C) Quadratic (power)
Explanation:
I took the physics exam
A person standing at the edge of a seaside cliff kicks a rock horizontally of the cliff from a
height of 52 m and it lands a distance of 35 m from the base of the cliff. What is the speed at
which the rock was initially kicked?
Answers
The time will be the same for both horizontal and vertical component. The initial speed is 10.7 m/s
What is Speed ?Speed is a distance travel per time taken. It is a scalar quantity and it is measured in m/s
Given that a person standing at the edge of a seaside cliff kicks a rock horizontally of the cliff from a height of 52 m and it lands a distance of 35 m from the base of the cliff.
The rock will move vertically downward with initial velocity = 0. The time taken will be constant. That is, same horizontally.
Let us first calculate the time by using the formula
h = ut + 1/2gt²
Where
h = 52 mu = 0Range R = 35 mg = 9.8 m/s²Substitute all the necessary parameters into the formula
52 = 0 + 1/2 × 9.8 × t²
52 = 4.9t²
t² = 52/4.9
t² = 10.6
t = √10.6
t = 3.26 s
The speed at which the rock was initially kicked can be found by
R = Ut
35 = U × 3.26
U = 35/3.26
U = 10.7 m/s
Therefore, rock was initially kicked at a speed of 10.7 m/s
Learn more about Speed here: https://brainly.com/question/24739297
#SPJ1
Part F
Imagine you were a sportscaster at the Olympics. You'd created a mathematical model similar to the one you just did. Imagine that you had a
computer program that could do an instantaneous analysis of video motion using that model. How could you use it in your sportscast?
Answers
A program that could do an instantaneous analysis of video motion will be useful it in a sportscast to analyze events as they occur.
Why will a program be needed?A motion video is defined as the display of video images at a rate (such as thirty frames per second) that causes objects to appear to move smoothly and continuously.
Sports inherently involve fast and accurate motion, which can be difficult for competitors to master but also for coaches and trainers to analyze and audiences to follow. Because of the nature of most sports, monitoring with sensors or other devices attached to players or equipment is generally not possible. This opens up a plethora of opportunities for the use of computer vision techniques to assist competitors, coaches, and the audience
Learn more about motion on:
https://brainly.com/question/27802581
#SPJ1
During an experiment, an object is placed on a disk that rotates about an axle through its center, as shown in Figure 1. The disk is a distance R =0.10 m from the center and rotates with a constant tangential speed of 0.60 ms. A free body diagram of the forces exerted on the block is shown in Figure 2 with an unknown force of friction. What is the force of friction exerted on the object?
A. 0.50 N
B. 0.72 N
C. 5.0 N
D. 7.2N
Answers
Answer:
B. 0.72 N
Explanation:
The speeds of a 600-kg roller coaster car at the top of three consecutive hills are shown below. The radii of the hills are shown. Determine the acceleration, net force, and normal force experienced by the car at the top of each hill.
Answers
Answer:
they will fly
Explanation:
yes flying is fun
The acceleration, net force, and normal force by the car at the top of hill A are 4.5 meter/second² , 3180 N and 3180 N.
The acceleration, net force, and normal force by the car at the top of hill B are 4.17 meter/second² , 3379N and 3379 N.
The acceleration, net force, and normal force by the car at the top of hill C are 4.0 meter/second² , 3480 N and 3480 N.
What is centripetal acceleration?Centripetal acceleration is a characteristic of an object's motion along a circular path. Centripetal acceleration applies to any item travelling in a circle with an acceleration vector pointing in the direction of the circle's center.
On hill A;
The centripetal acceleration = v²/r = 6²/8 meter/second² = 4.5 meter/second² .
The net force = m(g -a) = 600 (9.8 - 4.5) N = 3180 N.
The normal force = 3180 N
On hill B;
The centripetal acceleration = v²/r = 5²/6 meter/second² = 4.17 meter/second² .
The net force = m(g -a) = 600 (9.8 - 4.17) N = 3379 N.
The normal force = 3379 N.
On hill A;
The centripetal acceleration = v²/r = 4²/4 meter/second² = 4.0 meter/second² .
The net force = m(g -a) = 600 (9.8 - 4.0) N = 3480 N.
The normal force = 3480 N.
Learn centripetal acceleration here:
https://brainly.com/question/14465119
#SPJ2
Given a DC battery of voltage, V = 10.0 V connected to a resistor R = 2.00 Ohms. What is the current coming out of the battery? A)48.2 A B)7.67 A C)9.65 A D)23.4 A E)5.00 A
Answers
Given:
The voltage of the battery, V=10.0 V
The resistor of the resistance, R=2.00 Ω
To find:
The current coming out of the battery.
Explanation:
From Ohm's law, the voltage across a circuit is directly proportional to the current through the circuit.
Thus, the voltage of the battery is given by,
\(V=IR\)Where I is the current coming out of the battery.
On substituting the known values,
\(\begin{gathered} 10.0=I\times2.00 \\ \Rightarrow I=\frac{10.0}{2.00} \\ =5.00\text{ A} \end{gathered}\)Final answer:
The current coming out of the battery is 5.00 A.
Thus the correct answer is option E.
D. Scott has a machine with a mechanical advantage of five.
How much force does he need to apply to create an
output force of 120 N?
A. 5 N
B. 24 N
C. 125 N
D. 6,000 N
Answers
The force needed by Scott to create an output force of 120 N given that the machine has a mechanical advantage of 5 is 24 N (option B)
How do i determine the force needed ?We must understand that the force needed in this case is called effort. Thus, we can obtained the force needed as illustrated below:
Mechanical advantage of machine (MA) = 5output force (i.e Load) = 120 NForce needed (i.e Effort) = ?Mechanical advantage (MA) = Load (L) / Effort (E)
Mechanical advantage (MA) = output force / Force needed
5 = 120 / Force needed
Cross multiply
5 × Force needed = 120
Divide both sides by 5
Force needed = 120 / 5
Force needed = 24 N
Thus, we can conclude that the force needed by Scott is 24 N (option B)
Learn more about effort:
https://brainly.com/question/16032440
#SPJ1