Two spherical shells have a common center. A -2.1 10-6 C charge is spread uniformly over the inner shell, which has a radius of 0.050 m. A +5.0 10-6 C charge is spread uniformly over the outer shell, which has a radius of 0.15 m. Find the magnitude and direction of the electric field at the following distances (measured from the common center). (a) 0.20 m magnitude direction (b) 0.10 m magnitude direction (c) 0.025 m magnitude direction
Answers
Answer:
a) E_total = 6,525 10⁴ N /C ,field direction is radial outgoing
b) E_total = 1.89 10⁶ N / C, field is incoming radial
c) E_total = 0
Explanetion:
For this exercise we can use that the charge in a spherical shell can be considered concentrated at its center and that the electric field inside the shell is zero, since Gauss's law is
Ф = E .dA = q_{int} /ε₀
inside the spherical shell there are no charges
The electric field is a vector quantity, so we calculate the field created by each shell and add it vectorly.
We have two sphere shells with radii 0.050m and 0.15m respectively
a) point where you want to know the electric field d = 0.20 m
shell 1
the point is on the outside,d>ro, therefore we can consider the charge to be concentrated in the center
E₁ = k q₁ / d²
shell 2
the point is on the outside,d>ro
E₂ = k q₂ / d²
the total camp is
E_total = -E₁ + E₂
E_total = k ( \(\frac{-q_1 + q_2}{d^2}\))
E_total = 9 10⁹ (-2.1 10⁻⁶+ 5 10⁻⁶ / .2²
E_total = 6,525 10⁵ N /C
The field direction is radial and outgoing ti the shells
b) the calculation point is d = 0.10m
shell 1
point outside the shell d> ro
E₁ = k q₁ / d²
shell 2
the point is inside the shell d <ro
Therefore, according to Gauss's law, since there are no charges in the interior, the electrioc field is zero
E₂ = 0
E_total = E₁
E_total = k q₁ / d²
E_total = 9 10⁹ 2.1 10⁻⁶ / 0.1²
E_total = 1.89 10⁶ N / A
As the charge is negative, this field is incoming radial, that is, it is directed towards the shell 1
c) the point of interest d = 0.025 m
shell 1
point is inside the shell d< ro
as there are no charges inside
E₁ = 0
shell 2
point is inside the radius of the shell d <ro
E₂ = 0
the total field is
E_total = 0
Related Questions
A hard rubber comb is pulled through a student's hair, and acquires a negative electric charge. This must mean that ---.
Question 2 options:
the comb is electrically connected to the ground
the comb is taking electrons from the hair
the hair is taking protons from the comb
the comb is creating electrons
Answers
Answer:
the comb is taking electrons from the hair
Explanation:
As given,
A hard rubber comb acquires a negative electric charge.
Before rubbing,
The comb and the hair are electrically neutral
So, when we rub the comb with the hair , the electrons are transferred to the comb and the hair losses its negative charge and ended up with the positive charge.
So,
The correct option is - the comb is taking electrons from the hair
Gravity does 207 N of work when a 45 N object falls to the
ground. From what height does the object fall?
Answers
Answer: 4.6
Explanation:
Answer:
4.6
Explanation:
If we wanted to use some brain-mapping techniques to identify anatomical functioning, but did not want to use any type of dye or tracer, which method below would be the best choice?
A. MRI
B. EEG
C. PET
D. SPECT
In PET scans, the breakdown of ___________ materials in the body and the release of gamma rays produce a functional view of the brain.
A. organic
B. radioactive
C. toxic
D. metallic
Answers
Since you wanted to use some brain-mapping techniques to identify anatomical functioning, the method that would be the best choice is option A. MRI.
In PET scans, the breakdown of option B: radioactive materials in the body and the release of gamma rays produce a functional view of the brain.
What substance is employed in a PET scan?FDG, which stands for "fluorodeoxyglucose," is a simple sugar (like glucose) that is frequently employed in PET scanning. It is injected into the bloodstream and builds up inside the body, where it emits gamma rays as energy.
Note that without injecting any kind of dye or tracer, brain mapping techniques like magnetoencephalography (MEG) and functional magnetic resonance imaging (fMRI) scans can be used to detect the anatomical functioning of the brain. The diagnosis and treatment of neurodegenerative illnesses can both benefit greatly from these techniques.
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The arm of a crane at a construction site is
20.0 m long, and it makes an angle of 10.0°
with the horizontal. Assume that the max-
imum load the crane can handle is limited
by the amount of torque the load produces
around the base of the arm.
What maximum torque can the crane with-
stand if the maximum load the crane can
handle is 520 N?
Answer in units of N. m.
Answers
The maximum torque that the crane can withstand is 512.1 N.
What is the maximum torque the crane can withstand?
To calculate the maximum torque that the crane can withstand, we need to find the force produced by the load and the distance from the axis of rotation to the line of action of this force.
And also the distance from the axis of rotation to the line of action of the force = horizontal component of the arm length
The horizontal component of the arm length is given by:
r = Lcos(θ)
Finally, the maximum torque that the crane can withstand is given by:
τ = F r
τ = 520 N x cos ( 10 )
τ = 512.1 N
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If radio waves are used to communicate with an alien spaceship approaching Earth at 10% of the speed of light c, the aliens would receive our signals at speed of:_______.
a. 0.99c
b. 1.10c
c. 1.00c
d. 0.90c
e. 0.10c
Answers
Answer:
3×10^7 m/s or 0.10c (e)
Explanation: If the actual value of the speed of light were to be put into consideration.
Given that the speed of light is c = 3.0×10^8m/s
The alien spaceship is approaching at the rate of 10% of the speed of light.
10% of 3.0×10^8m/s
10/100 × 3.0×10^8m/s
0.1 ×3.0×10^8m/s
3×10^7 m/s. Which is the same thing as 0.1 of c = 0.1×c
Answer: 1.00c
Explanation: I got it correct on the homework
A(n) _______________ absorbs energy and then emits electromagnetic radiation based on its _______________. Classical physics predicted that at a high enough temperature, _______________ light would be emitted. Instead, white light was emitted, resulting in the ultraviolet _______________. The photoelectric effect occurs when light shining on a metal creates a(n) _______________. However, only light of a certain minimum _______________ causes electrons to flow. Gas atoms excited by an electric current emit bands of colors of light in a(n) _______________. Each narrow band of light is associated with _______________ of a specific energy.
Answers
Answer:
Blackbody radiator, temperature, ultraviolet, catastrophe, electric current, frequency, spectrum, photons
Explanation:
# a p e x
1 and 2 ) A blackbody radiator is an object that absorbs energy, then emits electromagnetic radiation based on the temperature of the object. This comes directly from the definition in the passages.
3 and 4 ) Ultraviolet catastrophe describes when old physicists assumed as frequency increased the waves would go from visible to ultraviolet because that is what comes next on the spectrum. Instead of this happening, the light became white light and it was an apparent 'catastrophe'
Appropriate words for blank position shown below,
Blackbody radiatortemperature ultravioletcatastropheelectric currentfrequency spectrum photonsA blackbody radiator is defined as an object that absorbs all electromagnetic radiation that falls on it at all frequencies over all angles of incidence.
Ultraviolet light is a type of electromagnetic radiation that makes black-light posters glow
A movement of positive or negative electric particles produce current.
Frequency is defined as the number of cycles or vibrations undergone during one unit of time by a body in periodic motion.
Photons are particles which transmit light.
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If a clay ball hits another clay ball at rest and the two balls stick together and do not move after the collision the momentum is not concerned in this collision.is this statement trur or false?
Answers
True
The momentum is always conserved in a collision.
momentum (p) = mass (m) x velocity (v)
conservation of momentum:
m1 v1 + m2 v2 = (m1 + m2) vf
Where:
m1 = mass1
m2= mass 2
v1= initial velocity of mass one
v2 = initial velocity of mass two = 0 m/s ( rest)
Vf = final velocity of the two balls stuck together.
m1 v1 = (m1+m2) vf
m1 v1 = 0
Since m1 and v1 are not zero the momentum is not conserved.
how much power does it take to do 104 J of work in 8 sec?
Answers
Answer:
Given:
W=104J
t=8sec
Solve:
P=?
Equation:
P=W/t or Fd/t
P= 104J'8sec
P=13W
Tarzan wants to swing on a vine across a river. He is standing on a ledge above the water's edge, and the river is 5.00 m wide. The vine is attached to a tree branch that is 8.00 m directly above the opposite edge of the river. Initially the vine makes a
60.0∘
angle with the vertical as he is holding it. He swings across starting from rest, but unfortunately the vine breaks when the vine is
20.0∘
from the vertical.
(a) Assuming Tarzan weighs 900.0 N, what was the tension in the vine just before it broke?
(b) Does be land safely on the other side of the river?
Answers
Answer:
E D G E N U I T Y
Explanation:
lol
a) The tension in the vine just before it broke was 845.72 N.
b) Tarzan doesn't land safely on the other side of the river.
What is weight?Weight gauges how much gravity is pulling on a body. The weight formula is provided by: w = mg. Weight being a force The SI unit of weight is the Newton, which is also the same as the SI unit of force (N). When we look at how weight is expressed, we can see that it depends on both mass and the acceleration caused by gravity; while the mass may not change, the acceleration caused by gravity does.
Given parameters:
Wide of the river: d = 5.00 m.
Length of the tree branch: l = 8.00 m.
Initial angle of the tree branch = 60°.
Angle of tree branch when it breaks = 20.0°.
a) Weighs of Tarzan: W = 900.0 N.
The tension in the vine just before it broke = W cos20°
= 900.0 × cos20° N.
= 845.72 N.
b) Distance traveled by Tarzan using this branch = lsin60° - lsin20°
= 8.0( sin60° - sin20°) m = 4.19 m.
Hence, he doesn't land safely on the other side of the river.
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a river flows with a uniform velocity v. a person in a motorboat travels 1.52 km upstream, at which time a log is seen floating by. the person continues to travel upstream for 91 min at the same speed and then returns downstream to the starting point, where the same log is seen again. find the flow velocity of the river. assume the speed of the boat with respect to the water is constant throughout the entire trip. (hint: the time of travel of the boat after it meets the log equals the time of travel of the log.) answer in units of m/s
Answers
The uniform velocity of the log relative to the river is 3.04 km/182 min = 0.017 km/min.
What is speed?The pace and direction of an object or particle's movement are described by the vector quantity known as velocity. It consists of two elements: direction and speed.
motorboat is v + u
u is the speed
the person travels 1.52 km upstream
total distance covered by the motorboat is 1.52 km x (v + u).
The time taken by the person to travel upstream is 91 min. Therefore, the total time taken by the motorboat to cover the round trip (upstream + downstream) is 182 min.
total distance covered by the motorboat during the round trip is 3.04 km x (v + u).
the distance covered by the log during the round trip is also 3.04 km.
Therefore, the velocity of the log relative to the river is 3.04 km/182 min = 0.017 km/min.
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6.3 Calculate the current that flows through the element of a heater when the potential difference is 250V and the resistance of the element is 150.
Answers
Answer:
16.66
Explanation:
Help pls can you answer this question legit pls ;(
Answers
Answer:
pls give me brainliest
Explanation:
Answer:
THE ANSWER IS................. something
Explanation:
In a DC generator, the generated emf is directly proportional to the
Answers
In a DC generator, the generated electromotive force (emf) is directly proportional to the rotational speed of the generator's armature and the strength of the magnetic field within the generator.
This relationship is described by the equation for the generated emf in a DC generator:
Emf = Φ * N * A * Z / 60
Where:
Emf is the generated electromotive force (in volts),
Φ is the magnetic flux density (in Weber/meter^2\(meter^2\) or Tesla),
N is the number of turns in the armature winding,
A is the effective area of the armature coil (in square meters),
Z is the total number of armature conductors, and
60 is a constant representing the conversion from seconds to minutes.
From this equation, we can see that the generated emf is directly proportional to the magnetic flux density (Φ) and the product of the number of turns (N), effective area (A), and the total number of armature conductors (Z). This means that increasing any of these factors will result in a higher generated emf.
The magnetic flux density (Φ) can be increased by using stronger permanent magnets or increasing the strength of the field windings in the generator.
The number of turns (N) and the effective area (A) are design parameters and can be optimized for a specific generator. Increasing the number of turns or the effective area will result in a higher generated emf.
Similarly, the total number of armature conductors (Z) can be increased to enhance the generated emf.
By controlling and optimizing these factors, the generated emf in a DC generator can be increased, resulting in higher electrical output. However, it is important to note that there are practical limits to these factors based on the design and construction of the generator.
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If you drop your keys from the tallest building in San Antonio, how fast will
they be falling after 3 seconds?
9.8 m/s
0 14,7 m/s
29.4 m/s
44,1 m/s
Answers
Hi there!
We can use the equation:
v = at, where in this instance:
v = velocity (m/s)
a = acceleration due to gravity (m/s²)
t = time (s)
g ≈ 9.8 m/s², so:
v = 9.8(3) = 29.4 m/s
What is the momentum of a 5 kg object that has a velocity of 1.2 m/s?
a) 3.8 kg • m/s
b) 4.2 kg • m/s
c) 6.0 kg • m/s
d) 6.2 kg • m/s
Answers
Explanation:
answer is 6.0Kg •m/s because
momentum= mass • velocity
that is 5 • 1.2 = 6
Claire pushes a box to the left while Jamie pushes the same box to the right. The box stays in
between them in the same position.
Which best explains why Claire and Jamie are unable to move the box?
A. They are applying an unbalanced force.
B. They are applying a balanced force.
C. They are applying gravity.
D. They are applying friction.
Answers
Explanation:
The box is not able to move Becouse there both putting the same amount of force into pushing the box making the box unable to move
Which of the following is not one of the emotional expressions that are universally recognized?
OA. Happiness
OB. Disgust
OC. Sadness
OD. Love
HELPP!
Answers
Answer:
B
Explanation:
The answer should be B.
Which statements describe kinetic and potential energy? Check all that apply.
Energy can be stored in the position of an object.
Energy is not present in a moving object.
Energy can be stored in the position of the particles that make up a substance.
Energy exists as movement of the particles of a substance.
Energy is greater in faster-moving particles than in slower-moving particles.
Energy is lower in objects with greater mass than in objects with less mass.
Answers
Answer:
First option, third option, fourth option, and the fifth option.
Explanation:
Kinetic energy is energy an object has when it's motion, the greater the speed the greater the kinetic energy. For example, a car moving and increasing in speed is kinetic energy since the object is in motion. If the car stops and parks in a parking lot that is potential energy. Potential energy is the amount of energy an object has when it's at rest or not in motion.
So, the answer for this question is as followed first option or "energy can be stored in the position of an object." Third option or "Energy can be stored in the position of the particles that make up a substance." Fourth option or "Energy exists as movement of the particles of a substance." The last answer will be the fifth option or "Energy is greater in faster-moving particles than in slower-moving particles."
Hope this helps.
A man runs 400.0m around the track,
then another 400.0m around the track again.
As the track is 400.Om long, the man is back
where he started!
a) calculate distance travelled
b) calculate mans displacement
Answers
Answer:
Distance = 800 m, Displacement = 0
Explanation:
It is given that,
A man runs 400 m around the track, then another 400 m around the track again.
(a) Distance travelled by an object is the sum of total path covered.
In this case, he has covered total path of 400 m + 400 m i.e. 800 m. It means he travelled a distance of 800 m.
(b) Displacement covered by an object is the shortest path covered by it. In this problem, he reaches the point from where he has started. It means that his displacement is equal to 0.
Define concave mirror?
Answers
In 1940, it was discovered that uranium could be artificially changed to plutonium, a process called transmutation. What combination of decay processes would convert U-239 (92 protons) into Pu-239 (94 protons)?
A. Beta-decay followed by beta decay.
B. Positron emission followed by electron capture.
C. Electron capture followed by alpha decay.
D. Alpha decay followed by beta decay.
Answers
The combination of decay processes that would convert U-239 into PU- 239 is beta decay followed by another beta decay. There are two different types of beta decay (positive and negative beta decays) they both occur simultaneously in order to move the atoms towards stability.
A 1 kg rock is sitting at the edge of a cliff 100 meters high. What is the rock's gravitational potential energy?
Answers
Answer:
000.83
Explanation:
i dont know how to explain it bt i did something on paper for it
How dose light travel in a way that we are able to see objects.
Answers
The temperature of a body is from 200 to 300C.The change of temp at absolute scale is
Answers
Answer:
mark me brainliest
Explanation:
The change of temperature at absolute scale is. A. 3.73 K
Answer:
373K
Explanation:
300°c - 200°c =100°c
Absolute scale means Kelvin scale so
0°c= 273°c
100°c = 100 + 273
=373K
What is the frequency of microwaves of wavelength 3 cm?
Give your answer to the
nearest GHz and without units.
Answers
Answer:
10 GHz
Explanation:
Applying,
v = λf.................... Equation 1
Where v = speed of microwave, λ = wavelength, f = frequency.
make f the subject of the equation
f = v/λ................ Equation 2
Note: Microwave is an electromagnetic wave, and all electromagnetic wave have the same speed, which is 3×10⁸ m/s
From the question,
Given: λ = 3 cm = 0.03 m
Constant; v = 3×10⁸ m/s
Substitute these values into equation 2
f = 3×10⁸/(0.03)
f = 10¹⁰ Hz
f = (10¹⁰/10⁹) GHz
f = 10 GHz
A circular metal disc is heated. Which quantity decreases?
Answers
Answer:
Bbbbb. Metal disc.
Explanation:
Sent from my Huawei and I am not a good person and I am not a good person and I am not a good person and I am not a good person
Nowton's third law refers to 'action reaction forces*. These forces are
always:
Answers
equal in magnitude but opposite in direction
A friend lends you the eyepiece of his microscope to use on your own microscope. He claims that since his eyepiece has the same diameter as yours but twice the focal length, the resolving power of your microscope will be doubled. Is his claim valid? Explain.
Answers
Answer:
The resolving power remains same.
Explanation:
The resolving power of the lens is directly proportional to the diameter of the lens not on the focal length.
As the diameter is same but the focal length is doubled so the resolving power remains same.
Scientists seek to acquire knowledge and understanding of the real world through the formulation, testing, and evaluation of what?
A) scientific hypothesis
B)technology
C)deductive reasoning
D) scientific method
A scale measures the weight of a light object to be 11.000lbs +- 0.034 lbs. What is the uncertainty if this same scale is used to measure an object that weighs 78.000 lbs? Assume that the percent uncertainty of the scale remains constant.
A)0.034 lbs
B)0.044 lbs
C)0.240 lbs
D)0.310 lbs
Answers
Answer: 1)Scientists seek to acquire: scientific hypothesis
2)A scale measures the weight of a light object: 0.240 lbs
3)What does the process of scientific inquiry: It starts with a problem to solve or a question to answer
4)A mouse in a maze scurries 41 cm south: 76 cm southwest
5)When might an object's average velocity be equal to its average speed in two dimensions:
If the object moves in a straight line in one direction represented as positive, then the magnitude of average velocity will be equal to the average speed.
6)Using the velocity versus time graph, calculate the acceleration of Object A: 3 m/s^2
7)What is the range of a bullet fired horizontally at a height of 1.5m: 66.4m
8)What two vertical forces act on a falling leaf: weight, friction
9)What is equal and opposite to the applied force: spring force
10)Using the free-body diagram, calculate the net force: 12N, right
11)How does the force of impact during a collision change: it increases
12)The threads of a screw used to fasten two pieces of wood: by increasing the normal force exerted by the wood on the screw thread
13)A 60 kg skier with an initial velocity of 12 m/s coasts up a hill: 2.5m
14)A 1,500 kg car’s speed changes from 30 m/s to 15 m/s: -506,250 (negative 506,250| NOT POSITIVE)
15)What is true about weather: The weather depends on so many conditions that it is not possible to account for them all in any model.
16)A student records the mass of objects A, B, C, and D: A
17)Newton’s cradle is a contraption where metal balls: friction force
18)In a closed system, an object with a mass of 10 kg: 12kgm/s
19)Given the data, what is the kinetic energy of the: 3J
20)A wedge is a simple machine that is essentially two: A length of 12 in. and a thickness of 2 in.
21)Object A and Object B are at equal distances on opposite: 3/4
22)A geosynchronous satellite has an orbital period of 24: 35,900 km
23)Calculate the eccentricity for the planet if the: 0.0167
24)A planet travels in its orbit close to apogee : the same amount of time
25)If astronomers discovered a new planet and found its: 22.3 AU
Explanation:
Hope this helps you guys!!! <3 (this is for 'A Semester Exam')
Dangers of physical in heat and
humidity include:
A)hypothermia
B)frostbite
C)muscle cramps
D)wind chill index
Answers
Because if you don’t drink enough water when it’s hot you get cramps usually