Answers
The resistance, resistivity and the drift speed of electrons are as follows:
What is resistance?
Resistance is a measure of how difficult it is for electric current to flow through a material. It is defined as the ratio of the voltage across the material to the current passing through it. Mathematically, resistance can be expressed as R = V/I, where R is the resistance, V is the voltage, and I is the current.
a) To determine the resistance of the wire, we can use Ohm's law, which states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor:
V = I × R
We have the voltage (V) and current (I) values, so we can calculate the resistance as follows:
R = V / I
R = 25.0 mV / 790 mA
R = 0.03175 Ω
b) The resistivity of a material is a measure of its resistance to the flow of electrical current. It is a property of the material and is independent of the size and shape of the conductor. The formula for resistivity is given by:
ρ = R × A / l
Where R is the resistance, A is the cross-sectional area of the wire, and l is its length. We have the resistance value, so we can calculate the resistivity as follows:
ρ = R * A / l
\(\mathrm{\rho = 0.03175 \Omega \times \pi \times \dfrac{ (2.3 mm / 2)^2 }{ 6.3 m} }\)
ρ = 1.57 × 10⁻⁸ Ω m
c) The drift speed of electrons in a conductor is a measure of the average speed of the free electrons in the conductor. It is given by:
\(\mathbf{v_d}\) = I / (nₑ × A)
Where I is the current, ne is the number of free electrons per unit volume, and A is the cross-sectional area of the wire. We have the drift speed and current values, so we can calculate the number of free electrons per unit volume as follows:
nₑ = I / (\(\mathrm{v_d}\) × A)
\(\mathrm{n_e = \dfrac{790 mA}{ 1.8 \times 10^{-5} m/s \times \pi \times (2.3 mm / 2)^2} }\)
nₑ = 1.05 × 10²⁸ m⁻³
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Related Questions
A basketball is thrown for a free throw at 10m/s an angle of 20 degrees, makes it into the hoop and lands on the ground. Find the initial velocity in the y direction. ??????????
Answers
Answer:
2
Explanation:
because uWU
Answer:no answer
Explanation:
Cause ur weird
MIXED MES AGE
DIRECTIONS. CLICK ON EACH OBJECTAND CORRECTLY ASSEMBLE THE COMMUNICATION MODEL
FEEDBACK
EMAIL
SOCIAL MEDIA
DECODE
ENCODE
DECODE
ENCODE
MESSAGE
TEXT
TALKING
SENDER
RECEIVER
BODY LANGUAGE
NEDIUM
S
ال
Answers
Answer:
I'm not super sure what your asking for. But these look like elements of communication from a speech or communications class.
--------------message-------->
O O
\ | / ------ channel ------ \ | /
/\ /\
sender (encoder) receiver (decoder)
<----------feedback-------------
The sender (or encoder) encodes the message and sends it.The receiver (or decoder) decodes the message and receives it, then gives feedback to the sender.The channel is the medium through which the message is sent: this could be social media, email, text, talking, you name it.Body language can assist (or not) in sending the message.An airbys A380 airliner lands at 30 m/s. Partially loaded, its mass is 480000 kg. The engines apply reverse thrust for 12s to slow the plane to 25 m/s.How much thrust did the engines apply?
Answers
To determine the thrust applied by the engines, we can use Newton's second law of motion, which states that force (thrust) is equal to mass times acceleration. In this case, we need to calculate the force required to decelerate the plane from 30 m/s to 25 m/s in 12 seconds.
First, we calculate the change in velocity (∆v):
\(\displaystyle\sf \Delta v=25\,m/s-30\,m/s=-5\,m/s\)
Next, we calculate the acceleration (∆a) using the formula:
\(\displaystyle\sf \Delta a=\frac{\Delta v}{\Delta t}\)
where ∆t is the change in time, which is 12 seconds in this case.
\(\displaystyle\sf \Delta a=\frac{-5\,m/s}{12\,s}\)
Now, we can determine the force (thrust) applied by the engines using Newton's second law:
\(\displaystyle\sf F=m\cdot a\)
where m is the mass of the airplane, which is 480000 kg.
\(\displaystyle\sf F=480000\,kg\cdot \left(\frac{-5\,m/s}{12\,s}\right)\)
Calculating the result:
\(\displaystyle\sf F=-200000\,N\)
Therefore, the engines applied a thrust of -200000 Newtons (N) to decelerate the plane. The negative sign indicates that the thrust is in the opposite direction of the motion.
Which law of motion uses the formula mass = force x acceleration?
Answers
Answer:
Newton's second law
Explanation:
If My mom is 40 and my goldfish died what is my favorite color ?
Answers
Answer:
square
Explanation:
+=-=
Answer:
SɴOWʙʟØWɘR
Explanation:
An evacuated tube uses an accelerating voltage of 50 kV to accelerate electrons to hit a copper plate and produce X-rays. Non-relativistically, what would be the maximum speed (in m/s) of these electrons
Answers
Answer:
Explanation:
Accelerating voltage = 50 x 10³ V
energy created = q V where q is charge on electron and V is accelerating potential
So qV = 1/2 m v² , m is mass of electron and v is velocity
Putting values
1.6 x 10⁻¹⁹ x 50 x 10³ = 1/2 x 9.1 x 10⁻³¹ x v²
v² = 175.8 x 10¹⁴
v = 13.25 x 10⁷ m /s
Based on the naming rules for ions, which of the following is a negatively charged ion (not a polyatomic ion)?
chloride
chlorite
chlorine
chlorate
Answers
IONS QUICK CHECK:
1. Based on the naming rules for ions, which of the following is a negatively charged ion (not a polyatomic ion)?
A. Chloride
2. When moving across a period from left to right in the periodic table, excluding transition elements, which trend occurs?
D. Valence electrons increase by one
3. Which information about an atom can a period number give you?
D. How many energy levels it has
4. Fluorine has 7 valence electrons. Which charge is its ion likely to have?|
D. 1-
5. Which two elements in the list would bond together based on their ionic charges?
A. Potassium and iodine
This is my first question don’t really know how to use this app yet lol but somebody answer it for me pls!! Seded the corredare
in which sitter is the maximum possible work done
Oh when the age between the face and displacements
OB, when the age beween the face and displacement is 180°
when the age between the force and displacement is 45
OD, when the angle between the force and displacement is 90°
Reset
Bert
Answers
(This just for extras )
Friction is actually caused by what?
A. The electrostatic interaction between the molecules on the two surfaces moving across each other which is seen as normal forces on a microscopic scale.
B. The ratio of the mass is between the object.
C. The amount of force used to move one object where a higher force creates higher friction.
D. The interaction between the chemical bonds of the materials the objects are made of.
Answers
Answer:
The atomic number
The electrostatic interaction between the molecules on the two surfaces moving across each other which is seen as normal forces on a microscopic scale.
An atom with four protons and four electrons is in equilibrium. An electron is added. What is the overall charge of the atom?
Answers
The overall charge of the atom after an electron is added is -1.
An ion is an atom or molecule that has an unequal number of protons and electrons, resulting in a net electrical charge. Atoms are normally electrically neutral because the number of protons, which carry a positive charge, is equal to the number of electrons, which carry a negative charge. However, when an atom gains or loses one or more electrons, it becomes an ion with a net electrical charge.
When an atom loses one or more electrons, it becomes a positively charged ion, or cation, since the number of positively charged protons is greater than the number of negatively charged electrons. On the other hand, when an atom gains one or more electrons, it becomes a negatively charged ion, or anion, since the number of negatively charged electrons is greater than the number of positively charged protons.
An atom with four protons and four electrons is electrically neutral since the number of positively charged protons equals the number of negatively charged electrons. When an electron is added to the atom, the number of electrons becomes five, while the number of protons remains at four. This results in a net negative charge on the atom, since the extra electron carries a negative charge.
Therefore, the overall charge of the atom after an electron is added is -1.
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You know you can provide 600 W
of power to move large objects. You need to move a 60-kg
safe up to a storage loft, 18 m
above the floor.
Part A
With what average speed can you pull the safe straight up?
Answers
A. The average speed you can use to pull the safe is 1.02 m/s
B. The time needed to pull the safe up is 17.65 s
A. How do i determine the velocity?First, we shall obtain the force. This is shown below:
Mass of safe (m) = 60 KgAcceleration due to gravity (g) = 9.8 m/s² Force (F) =?F = mg
F = 60 × 9.8
F = 588 N
Finally, we shall obtain the average speed. Details below:
Power = 600 WForce = 588 NAverage speed =?Power = force × average speed
600 = 588 × average speed
Divide both sides by 588
Average speed = 600 / 588
Average speed = 1.02 m/s
B. How do i determine the time?The time needed to pull the safe up can be obtained as follow:
Average speed = 1.02 m/sTotal distance = 18 mTime = ?Time = Total distance / average speed
Time = 18 / 1.02
Time = 17.65 s
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Complete question:
You know you can provide 600 W
of power to move large objects. You need to move a 60-kg
safe up to a storage loft, 18 m
above the floor.
Part A
With what average speed can you pull the safe straight up?
Part B
What is the time needed to pull the safe up?
what is an emergent curriculum
Answers
Answer:
Emergent curriculum is an early education approach where teachers design projects unique to a child or group of kids.
Question 2 of 10
X-ray technology can be used to do which of the following?
O A. Photograph through solid objects
B. Monitor human activity at night
OC. Speed up the process of hardening paint
O D. Communicate across long distances
SUBMIT
Answers
X-ray technology can be used to do Photograph through solid objects. option A
What is X-ray technology about?X-ray technology includes the utilize of high-energy electromagnetic radiation to make pictures of the interior of objects, counting the human body. X-rays are a sort of electromagnetic radiation with wavelengths shorter than unmistakable light, but longer than gamma beams.
X-ray innovations includes the use of high-energy electromagnetic radiation to make pictures of the interior of objects, counting the human body. X-rays are a sort of electromagnetic radiation with wavelengths shorter than visible light, but longer than gamma beams.
Lastly, X-ray innovation is utilized in a assortment of other applications, such as air terminal security scanners, which utilize X-rays to form pictures of gear and other objects to distinguish potential dangers.
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a barrel will rupture when the gauge pressure within it reaches 350 kpa. it is attached to the lower end of a vertical pipe, with the pipe and barrel filled with oil \rho
Answers
The pipe will be 40.1 meter if the barrel is not to rupture.
What is fluid pressure?The pressure exerted by a fluid at equilibrium at any point due to the force of gravity is known as fluid pressure.
Given that: fluid pressure is: p = 350 kPa = 350 * 1000 Pa = 350000 Pa.
Density of fluid is: ρ = 890 kg/m^3.
Let the height of the pipe is h.
Hence, from the formula of P = hρg we get: the height of the pipe is:
h = P/ρg
= 350000/(890×9.8) m
= 40.1 meter.
So, the pipe is 40.1 m long.
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Picture is question i need help as soon as possible
Answers
Answer:
32.7 m
Explanation:
If it is in the air for 5.16 s the highest point is at one-half of this time
= 5.16/2 = 2.58 s <====== at this point velocity = zero
vf = vi + at
0 = vi - 9.8 (2.58) shows vi = 25.3 m/s
d = vi t + 1/2 at^2
= 25.3 (2.58) - 1/2 (9.8) (2.58^2 ) = max height = 32.7 meters
two forces x and y are acting at 120 degrees to each other, if the magnitude are 8N and 10N respectively determine their resultant
Answers
The resultant force of both forces is 15.62 N.
What is resultant?The Resultant of forces is a single force obtained when two or more forces are combined.
To calculate the resultant of the force, we use the formula below.
Formula:
R = √[a²+b²-2abcos∅]..................... Equation 1Where:
R = Resultant of the forces.∅ = Angle between both forcesFrom the question,
Given:
a = 8 Nb = 10 NSubstitute these values into equation 1
R = √[8²+10²-2×8×10cos120°]R = √[64+100-160cos120°]R =√ [164-160(-0.5)]R = √[164+80]R = √(244)R = 15.62 NHence, the resultant force of both forces is 15.62 N.
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Using the parallelogram law of vectors to obtain the resultant, we have the value 16 N.
What is the resultant force?The resultant force is that force that has the same effect in magnitude and direction as two forces acting together. In this case, we have two forces , 8 N and 10 N inclined at an angle of 120 degrees
Using the parallelogram law of vectors to obtain the resultant;
R = √([8²+10²)-2×8×10cos120°]
R = √164 +80
R = 16 N
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11. Approximatrly how many kelvins are equal to 60°F?
a. 439
b. 212
c. 902
d. 289
Answers
What causes friction between two solids?
Answers
Answer:
Friction is when 2 solids move against each other. The cause of friction is adhesion, and surface roughness. Surface roughness is when a surface is rough enough that is causes friction against another surface. Adhesion is when 2 surfaces collide because of thier molecular force.
Which statements accurately describe mechanical waves? Check all that apply.
Answers
The accurate statements that describe mechanical waves are: Mechanical waves require a medium , Mechanical waves transfer energy, Mechanical waves can be longitudinal or transverse, Mechanical waves can be categorized as compressional or shear waves, Mechanical waves obey the principles of reflection, refraction, and interference, Mechanical waves have measurable properties such as wavelength, frequency, and amplitude.
Mechanical waves are a type of wave that require a medium, such as a solid, liquid, or gas, to propagate. They are characterized by the transfer of energy through the oscillation or vibration of particles in the medium. Here are the accurate statements that describe mechanical waves:
1. Mechanical waves require a medium: This statement is true. Mechanical waves cannot propagate in a vacuum because they rely on the interaction of particles in a medium to transfer energy.
2. Mechanical waves transfer energy: This statement is true. Mechanical waves transport energy from one location to another as the particles of the medium vibrate or oscillate.
3. Mechanical waves can be longitudinal or transverse: This statement is true. Mechanical waves can exhibit different types of motion. In longitudinal waves, the particles of the medium oscillate parallel to the direction of wave propagation. In transverse waves, the particles oscillate perpendicular to the direction of wave propagation.
4. Mechanical waves can be categorized as compressional or shear waves: This statement is true. In a compressional wave, the particles of the medium undergo compression and rarefaction as the wave passes through. In shear waves, the particles move perpendicular to the direction of wave propagation, resulting in a sideways displacement.
5. Mechanical waves obey the principles of reflection, refraction, and interference: This statement is true. Mechanical waves can reflect off surfaces, change direction when passing through different media (refraction), and exhibit interference patterns when two or more waves interact.
6. Mechanical waves have measurable properties such as wavelength, frequency, and amplitude: This statement is true. Mechanical waves can be described by various properties. Wavelength represents the distance between two consecutive points in the wave, frequency is the number of wave cycles per unit of time, and amplitude is the maximum displacement of particles from their equilibrium position.
These statements accurately describe mechanical waves and their properties, highlighting the key characteristics of this type of wave propagation.
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Which statement about the accuracy and precision of measuring tools is true
Answers
Answer;
1. Accuracy is the closeness with which an instrument approaches the true value of the quantity being measured
2. Precision is a measure of the reproducibility of the measurement
3. Accuracy may be specified in terms of limits of errors.
A 1400-N crate rests on the floor.
How much work is required to move it at constant speed 5.0 m
vertically.
Express your answer to two significant figures and include the appropriate units.
Answers
The work done on the crate to move it vertically is 7000 J.
The work done to move a 1400-N crate at constant speed 5.0 m vertically is 7000 J. Here's the explanation:When an object is lifted up at a constant speed, the force applied to it is equal and opposite to the force of gravity acting on it. As a result, no net force is applied to the object, and no work is performed against it.The formula to determine the work done isW = FdwhereW is work doneF is forceand d is distance coveredTo calculate the work done on the crate to move it vertically upwards, we need to determine the force that needs to be applied to overcome gravity acting downwards. We know that force is equal to mass multiplied by acceleration, which means that the force required to overcome gravity acting on the crate is given by:F = mgwhereF is the force in Newtonsm is the mass in kilogram is the due to acceleration, 9.8 m/s²Substitute the given values into the formula:F = 1400 NNext, we need to determine the distance over which the crate is lifted vertically, which is given as d = 5.0 m.Substitute the given values into the formula: d = 5.0 mFinally, substitute the values into the formula to get the work done.W = FdW = 1400 N × 5.0 mW = 7000 J.
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The amount of work required to move the crate is determined as 7,000 J.
What is the work required to move the crate?The amount of work required to move the crate is calculated from the product of applied force and the displacement of the crate.
Mathematically, the formula for work done is given as;
W = Fd
where;
F is the applied forced is the displacement of the crateThe amount of work required to move the crate is calculated as;
F = 1400 N x 5.0 m
F = 7,000 J
Thus, the amount of work required to move the crate is calculated from the product of applied force and the displacement of the crate.
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Which statements accurately describe matter? Check all that apply.
Only living things are made up of matter.
Matter is made up of tiny particles called atoms.
Atoms were discovered in the twenty-first century.
Atoms cannot be divided and still retain the properties of its original state.
A single atom can be seen only with a standard microscope
Answers
The following statements accurately describe matter:
Matter is made up of tiny particles called atoms.
Atoms cannot be divided and still retain the properties of their original state.
What is Atom?
An atom is the basic unit of matter, consisting of a nucleus composed of protons and neutrons, surrounded by electrons in electron shells or energy levels. Atoms are the building blocks of all matter and are the smallest unit of an element that retains the chemical properties of that element.
The statement "Atoms cannot be divided and still retain the properties of their original state" refers to the concept of the indivisibility of atoms, as proposed by John Dalton in the early 19th century. According to Dalton's atomic theory, atoms are considered to be the smallest unit of matter that retains the properties of an element. In other words, atoms are considered to be indivisible and cannot be further broken down into smaller particles without losing their characteristic properties.
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What is specific heat capacity??
Answers
Specific heat capacity is the unit mass of a substance is defined as the amount of heat absorbed (kg) (J), when its temperature rises 1 K (or 1 ° C), and its units J / ( kg K) or J / happen. (Kg ° C).Hope it helps u
Stay safe, stay healthy and blessed.Have a good day !Thank you
#Jennifer
Answer:
The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).
The road runner was being chased and outsmart the coyote. He ran past the road runner an fell straight down off a cliff. He fell with the same acceleration as gravity (9.8). Calculate his displacement if he fell for 4 seconds
Answers
The displacement of the runner after four seconds is 78.4 m.
What is the displacement after 4 seconds?We know that in this case, we are dealing with a case of an object that has a motion under gravity. We are told that the road runner an fell straight down off a cliff. The fact that we have been told that the runner just fell down the cliff means that the initial velocity of the runner would have to be taken in this context as zero since the runner was dropped from a height as shown.
Acceleration of the runner (g) = 9.8 m/s^2
Initial velocity of the runner (u) = 0 m/s
Time take (t) = 4 seconds
We then have;
h = ut + 1/2gt^2
If we then know that the initial velocity of the person is zero, then we have;
h = 1/2gt^2
h = 0.5 * 9.8 * (4)^2
h = 78.4 m
The height is 78.4 m.
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Which of the following would require the greatest number of calories?
a. heating 1 g of water from 10°C to 80°C
b. heating 10 g of water from 10°C to 40°C
c. heating 100 g of water from 10°C to 20°C
d. heating 1000 g of water from 10°C to 12°C
Answers
Answer:
D
Explanation:
You are boiling more grams for more time because the more water the longer it takes which requires more calories to burn it.
A student throws a baseball upwards at an angle of 60 degrees to the horizontal. The initial
horizontal and vertical components are 12.5 m/s and 21.7 m/s, respectively.
60 degrees
Refer to the above information and diagram. What position will have the smallest magnitude
of vertical velocity?
Answers
Answer:
The initial horizontal and vertical components are 12.5 m/s and 21.7 m/s, respectively?
Explanation:
If the gravitational constant is extremely weak, how is the force of gravity on earth so strong?
Answers
This is a whole quiz please answer ill make as many points as i can. Btw this is pickleball
Question 1 10 pts
The ___________________ rule says the ball must bounce one on each side before either team may start volleying the ball in the air.
Group of answer choices
Double Bounce
Volley Bounce
Bounce
Two Bounce
Flag this Question
Question 2 10 pts
The player standing in the _____________ service court is always the firsts server.
Group of answer choices
right
left
No answer text provided.
No answer text provided.
Flag this Question
Question 3 10 pts
Each game is played to ___________ points, won by _________.
Group of answer choices
11, 2
21,1
15,1
12,2
Flag this Question
Question 4 10 pts
According to one of the inventors, the game was officially named after a family dog, Pickles, who would chase the ball and run off with it.
Group of answer choices
True
False
Flag this Question
Question 5 10 pts
Pickleball is played on a court the size of a Badminton court with what looks like an oversized ping pong paddle and a __________ball.
Group of answer choices
whiffle
tennis
paddle
boccee
Flag this Question
Question 6 10 pts
In Pickleball, there are two non-volley lines, which create an area called the _______ .
Group of answer choices
Kitchen
Ally
Drop Zone
Dead Area
Flag this Question
Question 7 10 pts
Only the receiving team can score a point by winning a rally.
Group of answer choices
True
False
Flag this Question
Question 8 10 pts
Pickleball combines elements of Badminton, Tennis and ____________.
Group of answer choices
Ping Pong
volleyball
Bocce
Four Square
Flag this Question
Question 9 10 pts
Players may not hit the ball while standing in the kitchen unless the ball has already bounced on their side.
Group of answer choices
True
False
Flag this Question
Question 10 10 pts
Before serving, the server must call the score.
Group of answer choices
True
False
Answers
Answer:
1- bounce rule
2- left
3-11,2
4-true
5- whiffle ball
6- kitchen
7-false
8- ping pong
9- true
10- true
Explanation:
I'm pre5sure they are all right. brainliest please
Answer: I had the same quiz too I’m only doing so the other guy can get brainliest
Explanation:Kfkfkfjgjggj
A marine weather station reports waves along the shore that are 2 meters high, 8 meters long, and reach the station 8 seconds apart. Determine the speed of these waves.
Answers
One full weather station reports wave passing a spot every second is equivalent to a frequency of 1 Hz. The frequency is 48=12=0.5 Hz if 4 waves pass a spot in 8 seconds.
What is the frequency of a 30-second ocean wave that hits the shore?The number of cycles that make up a time unit is the frequency. The frequency of a wave with a 30-second period is therefore 1 30 = 0.033 cycles per second, or 0.033 Hertz (Hz).
Which of the following statements most accurately sums up how a wave crosses a border and enters a new medium?A wave's speed and wavelength vary as it crosses a border and enters a new medium, but its frequency doesn't.
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The angle of incidence always equals what?
Answers
Answer:
Angle Of Incidence Formula The angle of incidence is equal to the reflected angle through the law of reflection. The angle of incidence and the angle of reflection is always equal, and they are both on the same plane along with the normal. 2,44,451
Explanation:
that could help you with work.
Answer:
to the angle of reflection
Explanation: