Charge is uniformly distributed throughout a spherical insulating volume of radius R=4.00 cm . The charge per unit volume is −6.5 μCm3 Find the electric field at the center of the sphere. Enter a positive number if the field points radially out, negative if the field points radially in, or zero if there is no field.
Answers
Answer
-8.67× 10^6 N/C
Explanation:
The Electric Field is defined as force per unit charge.
E = Q/ 4π£r2
Qv= −6.5 μCm3
Qv = Q/ V= Q/ 4/3 πr3
Hence Q = 4/3 πr3 × Qv
Hence E = 4/3 πr3 × Qv / 4π£r2= Qvr/3£
−6.5 μ × 4/ 3×8.854 ×10^-12
-6.5 × 4 × 10^6/3 = -8.67× 10^6 N/C
Note: £ = 8.854×10^-12m/F
is the permittivity of free space
Qv is the charge per unit volume
V is volume and volume
The correct option about electric field due to sphere is, “0”.
What is Electric Field ?Electric field is Electric force per unit charge.Direction of Electric field is same as of Electric Force.Electric field due to a positive charge is radially away from it.Electric field due to a negative charge is radially toward it.How to solve this question ?According to gauss law, The electric field inside non conducting sphere is
E = ( ρr ) / ( 3ε₀ )
Taking ρ / ( 3ε₀ ) as constant
E ∝ r
At centre, r = 0
Hence, E will also be 0
Thus, we can conclude that Electric field inside non conducting sphere is E = ( ρr ) / ( 3ε₀ ) and thus at centre it will be 0.
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Related Questions
When does your body conduct current more readily?
when it is hot
when it is dry
when it is cold
when it is wet
Answers
Answer:
When you are wet or you are sweating current passes easily.
Explanation:
wetness increases conductivity. therefore 'when it is wet'.
Material aluminium density km-3 2-7x10² Relative density
Answers
The relative density of aluminum is 2.7. This means that aluminum is 2.7 times denser than water, which is the reference substance often used for comparing densities
The relative density (also known as specific gravity) of a material is the ratio of its density to the density of a reference substance. In this case, we are given the density of aluminum as 2.7 x 10^3 kg/m^3.
To find the relative density, we need to compare it to the density of the reference substance. The most commonly used reference substance for relative density is water, which has a density of 1000 kg/m^3.
Relative density = Density of the material / Density of the reference substance.Relative density = (2.7 x 10^3 kg/m^3) / (1000 kg/m^3)
Relative density = 2.7
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what is the net force in this image?
Answers
Answer:
-15 as it inverse to gravity
the direction of big force
A car is moving at 6 m/s and then accelerates at 1.7 m/s2 for 4.2 seconds. What is the final velocity of the car?
Answers
Explanation:
Hey there!!
Here,
Initial velocity (u) = 6m/s.
Acceleration (a) = 1.7m/s^2.
Time (t) = 4.2s.
final velocity (v) = ?
We have,
\(a = \frac{v - u}{t} \)
Putting their values,
\(1.7 = \frac{v - 6}{4.2} \)
7.14 = v - 6
v = 7.14 + 6
Therefore, the final velocity is 13.14 m/s.
Hope it helps....
Why does a watched pot never boil?
Answers
A child is playing in a park on a rotating cylinder of radius, r , is set in rotation at an angular speed of w. The Base of the cylinder is slowly moved away, leasing the child suspended against the wall in a vertical position.
What Is the minimum coefficient of friction between the child's clothing and wall is needed to prevent it from falling .
Answers
Answer:
\(\mathbf{\mu_s = \dfrac{g}{\omega^2r}}\)
Explanation:
From the given information:
The force applied to the child should be at equilibrium in order to maintain him vertically hung on the wall.
Also, the frictional force acting on the child against gravitational pull is:
\(F_f = \mu _sN\)
where,
the centripetal force \(F_c\) acting outward on the child is equal to the normal force.
\(F_c= N\)
SO,
\(F_f = \mu_s F_c\)
Since the centripetal force \(F_c = \dfrac{mv^2}{r}\)
Then:
\(F_f = \dfrac{ \mu_s \times mv^2}{r}\)
Using Newton's law, the frictional force must be equal to the weight
\(F_f = W\)
\(\dfrac{ \mu_s \times mv^2}{r} = mg\)
\(\dfrac{ \mu_s v^2}{r} = g\)
Recall that:
The angular speed \(\omega = \dfrac{v}{r}\)
Therefore;
\(g = \mu_s \omega^2 r\)
Making the coefficient of friction \(\mu_s\) the subject of the formula:
\(\mathbf{\mu_s = \dfrac{g}{\omega^2r}}\)
How does solar weather affect Earth’s magnetosphere? Select the two correct answers.
It causes geomagnetic storms.
It generates auroras.
It develops solar wind.
It forms radiation belts.
Answers
A geomagnetic storm occurs when the solar wind collides with the electromagnetic field of the earth generating disturbances in the Earth's magnetosphere.
An aurora is a luminescent formation produced by the interaction of charged solar particles and the terrestrial electromagnetic field. The solar wind pushes these particular to the terrestrial electromagnetic field that later transports them to the poles, where they are seen in different colors according to the type of particle.
Please help me! What is Ohm's law?
Answers
Ohm's law shows the relationship between voltage, current, and the resistance of a energy bond. The formula for Ohm's law is:
voltage = current x resistance
This formula tells you that current and resistance is the voltage of an energy bond.
Hope this helps you!
Answer: What is Ohm’s Law?
Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit.
Ohm's Law (E = IR) is as fundamentally important as Einstein's Relativity equation (E = mc²) is to physicists.
E = I × R
It means voltage = current × resistance, or volts = amps × ohms, or V = A × Ω.
Resistance cannot be measured in an operating circuit, so Ohm's Law is especially useful when it needs to be calculated. Rather than shutting off the circuit to measure resistance, a technician can determine R using the above variation of Ohm's Law.
Plz mark brainliest:)
If 10 W of power is supplied to 1 kg of water at 100℃, how long will it take to for the water to completely boil away? The time calculated is a little less than actual time of boiling in practice. Why?
Answers
Answer:
t = 2.26 x 10⁵ s
Explanation:
The energy supplied to the water will be equal to the heat required for the boiling of water:
E = ΔQ
Pt = mL
where,
P = Power = 10 W
t = time = ?
m = mass of water = 1 kg
L = Latent heat of vaporization of water = 2.26 x 10⁶ J/kg
Therefore,
\((10\ W)t = (1\ kg)(2.26\ x\ 10^6\ J/kg)\\\\t = \frac{2.26\ x\ 10^6\ J}{10\ W}\\\\\)
t = 2.26 x 10⁵ s
This time will be less than the actual time taken due to some heat loss during the transmission of this heat energy to the container in which water is held.
How are wavelength and frequency related?
As wavelength increases frequency increases.
b. As wavelength decreases frequency decreases.
As wavelength increases frequency decreases.
d. None of the above
Answers
Answer:
Hey dear
Explanation:
Its option C
As Wavelength increases frequency decreases
In other case,
When Wavelength decreases frequency increases
its opposite
Tq
In an attempt to reduce the extraordinarily long travel times for voyaging to distant stars, some people have suggested traveling at close to the speed of light. Suppose you wish to visit the red giant star Betelgeuse, which is 430 lyly away, and that you want your 20,000 kgkg rocket to move so fast that you age only 36 years during the round trip.
A. How fast (v) must the rocket travel relative to earth?
B. How much energy is needed to accelerate the rocket to this speed?
C. How many times larger is this energy than the total energy used by the United States in the year 2000, which was roughly 1.0 x 10^20 J?
Answers
Answer:
a) \(v=0.999124c\)
b) \(E=7.566*10^{22}\)
c) \(E_a=760 times\ larger\)
Explanation:
From the question we are told that
Distance to Betelgeuse \(d_b=430ly\)
Mass of Rocket \(M_r=20000\)
Total Time in years traveled \(T_d=36years\)
Total energy used by the United States in the year 2000 \(E_{2000}=1.0*10^20\)
Generally the equation of speed of rocket v mathematically given by
\(v=\frac{2d}{\triangle t}\)
\(v=860ly/ \triangle t\)
where
\(\triangle t=\frac{\triangle t'}{(\sqrt{1-860/ \triangle t)^2}}\)
\(\triangle t=\frac{36}{(\sqrt{1-860/ \triangle t)^2}}\)
\(\triangle t=\sqrt{(860)^2+(36)^2}\)
\(\triangle t=860.7532\)
Therefore
\(v=\frac{860ly}{ 860.7532}\)
\(v=0.999124c\)
b)
Generally the equation of the energy E required to attain prior speed mathematically given by
\(E=\frac{1}{\sqrt{1-(v/c)^2} }-1(20000kg)(3*10^8m/s)^2\)
\(E=7.566*10^{22}\)
c)Generally the equation of the energy \(E_a\) required to accelerate the rocket mathematically given by
\(E_a=\frac{E}{E_{2000}}\)
\(E_a=\frac{7.566*10^{22}}{1.0*10^{20}}\)
\(E_a=760 times\ larger\)
Use the drop-down menus to complete the sentences.
The first step in a bill becoming a law is for the bill to be
.
Next, the bill goes to
to be marked up, dropped, or sent to the floor.
After that, the bill is debated on the floor and can pass on a majority vote of
.
In the next stage, the bill must go to the
to repeat the process.
After the bill is resolved in the
, it goes to the president.
Answers
The first step towards a bill becoming a law is for the bill to be introduced in Congress.
Next, the bill goes to a committee to be marked up, dropped, or sent to the floor.
After that, the bill is debated on the floor and can pass with a majority vote of the house that sponsored it.
In the next stage, the bill must go to the other chamber, to repeat the process.
After the bill is resolved in the conference committee, it goes to the president.
What is the Congress?The Congress is sometimes referred to as Senate and it can be defined as a deliberative assembly or council of elected citizens found in the upper chamber or house of a bicameral legislature.
This ultimately implies that, Congress is a federal legislative arm of government of the United States of America, which is saddled with the responsibility of enacting and passing federal laws and bills for the citizens, with the steps enumerated above.
Generally speaking, the first step of making bill to become a law is introducing it to the Congress while the last step is the resolution of a bill if it is voted in favor by at least 44 senators, and then it finally goes to the president for assent through his or her signature.
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Complete Question:
Use the drop down menus to complete the sentences.
The first step in a bill becoming a law is for the bill to be _____.
Next the bill goes to _____ to be marked up, dropped or sent to the floor.
After that, the bill is debated on the floor and can pass on a majority vote of ____.
In the next stage, the bill must go to the ____ to repeat the process.
After the bill is resolved in the ____, it goes to the president.
Use the force diagrams below to determine whether the cart is not moving, moving at a constant speed speeding up or slowing down
Answers
a) Cart is speeding up ; b) cart is slowing down and c) cart is not moving.
What do you understand by force and friction?Force of friction is a contact force whereas friction is the force that resists motion when surface of one object comes in contact with surface of another. Example is the force of friction between two stones rubbed with each other.
Static friction magnitude is directly proportional to normal force magnitude and the roughness between sliding surfaces. The ratio of magnitude of frictional force divided by normal force magnitude is called as coefficient of friction. Friction takes place at the point of contact between two bodies.
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Eustace drives 20.0 km to the east when he realizes he left his wallet at home. He drives 20.0 km west to his house, takes 5.0 min to find his wal- let, then leaves again. Eustace is 40.0 km east of his house exactly 60.0 min after he left the first time. a. What is his average velocity? b. What is his average speed?
Answers
a. His average velocity would be 1.11m/s2
b. His average speed would be 2.05m/s
What is Velocity?Velocity of a particle is its speed and the direction in which it is moving.
It can also be described as the instantaneous rate of change of the particle's distance traveled, and the direction in which the distance is changing. The SI units of the speed is the metre per second squared (m/s2). It is a vector quantity, hence is has magnitude and direction.
What is Speed?Speed is a scalar quantity which tells how fast an object is moving, regardless of its direction. The SI units of the speed is the metre per second (m/s). It is a scalar quantity and has only magnitude with no direction.
From the question;
Velocity = displacement/time
displacement = 40 km (4000m)
time = 60 mins (3600s)
Velocity = 4000/3600
Velocity = 1.11m/s2
Speed = total distance covered/total time
Speed = (40km + 20km + 20km) / (60mins + 5 mins)
Speed = (4000m + 2000m + 2000m) / (65mins)
Speed = (8000m/3900s)
Speed = 2.05m/s
Hence, his average velocity is 1.11m/s2 and speed 2.05m/s.
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Explain/Describe how atoms in domains determine whether a material is magnetic or not. (Please help this is due today)
Answers
Answer:
In a material, the magnetic behavior depends on the alignment of magnetic moments of the atoms. Magnetic moments are generated by the motion of the electrons in the atoms. When the magnetic moments of atoms in a material are aligned in a specific pattern, it creates a magnetic field which results in the material being magnetic.
In many materials, the magnetic behavior arises due to the alignment of magnetic domains, which are regions of atoms with magnetic moments aligned in the same direction. When many domains with aligned magnetic moments are present in a material, the material becomes magnetic.
The magnetic behavior of a material depends on the number of electrons and the arrangement of those electrons in the atoms. In particular, for an atom to have a magnetic moment, it must have unpaired electrons, meaning electrons that are not paired with another electron with the opposite spin. When these unpaired electrons in the atoms are aligned, they generate a magnetic moment. If all electrons are paired, there will not be a net magnetic moment, so the material will not be magnetic.
So, in summary, the magnetic behavior of a material is determined by the alignment of magnetic moments of atoms. When the magnetic moments of many atoms in a material align in the same direction, it creates a magnetic field, leading to a material being magnetic. This alignment is usually present in magnetic domains consisting of atoms with unpaired electrons.
If a force of 50 N is applied to an object for 0.2s , and it
changes its velocity by 10m/s , what could be the mass
of the object?
Answers
Answer:
Using Newton’s 2nd law
Ft=m(v-u)
m=50*0.2/10
m=10/10
m=1kg
Explanation:
By using Newton's second law, the mass of the object is 1kg
FORCE
The force on an object is a push or pull effect.
Given that a force of 50 N is applied to an object for 0.2s , and it
changes its velocity by 10m/s. The parameters are;
Force F = 50 NTime t = 0.2 sChange in Velocity = 10 m/sMass m = ?From first linear equation of motion,
V = U + at
V - U = at
Where V - U = change in velocity = 10 m/s
Substitute it and time t into the equation.
10 = 0.2a
a = 10/0.2
a = 50 m/\(s^{2}\)
From second Newton's law, F = ma
Substitute the force and the acceleration into the formula
50 = 50m
m = 50/50
m = 1 kg
Therefore, the mass of the object is 1kg.
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. A gas cylinder contains 30 liters of diatomic nitrogen gas at 273 K and a pressure of 140 atm. If the temperature is increased to 300 K, how much will the internal energy of the gas increase?
Answers
Answer:
If the temperature is increased to 300 K, the gas molecules will have an increase in kinetic energy. This will increase the internal energy of the gas as kinetic energy is one type of internal energy. However, the pressure will also increase as the gas molecules hit the walls of the cylinder with more force. This increase in pressure will decrease the internal energy of the gas as it takes more energy to compress the gas molecules.
Explanation:
Two uniform solid spheres, A and B have the same mass. The radius of sphere B is twice that of sphere A. The axis of rotation passes through the center of each sphere. Which one of the following statements concerning the moments of inertia of these spheres is true?
a. The moment of inertia of A is one-fourth that of B
b. The moment of inertia of A is one-half that of B
c. The moment of inertia of A is 5/4 that of B
d. The moment of inertia of A is 5/8 that of B
e. The two spheres have equal moments of inertia
Answers
Answer:
I = 2/5 M R^2 for solid sphere
IA = 2/5 M R^2
IB = 2/5 M (2 R)^2
IB / IA = 4
a. Sphere A has 1/4 the inertia of sphere B.
Science 6a unit 2 test study guide
Please help me out!!! This is a major grade been taking care of my baby brother while mom works barely had time to study!
Answers
Answer:
at number 8 the answer is Uranus
Mr. Jones's prescription calls for 1.04 tablets per day. Based on this information, how many tablets should Mr. Jones take per day? a) 1.25 O b) 1.5 c) 1 O d) 2
I think the answer is a but I'm not sure I'm really a little confused I want to check with this app please can someone heelp me
Answers
Answer:
c
Explanation:
It really depends on what the stuff is. This should not be a math or physics question.
Having said that, I answer it by rounding it to 1. 1.04 is closest two one.
That is not entirely a satisfactory answer. Most people who take medications have pill splitters. They easily cut a pill in half. They can do this only if a the medicine's directions, or a pharmacist, or a doctor tells you can do this. Cutting it into quarters should never be done.
So a is really incorrect medically.
1.5 is too far away
C is probably the intended answer; it would annoy me no end if it was anything but c. If this was just a rounding question, it rounds to c. There is no medication that requires an intake of 1.04. No one could get that kind of accuracy.
2 is really too far away.
Explain the light detection technique of photovoltaic detection
Answers
Answer:
Photovoltaic detection is a technique that converts light into electrical energy. It is a process that involves the use of a photovoltaic cell, which is made up of semiconductor materials, to generate an electric current when exposed to light.
The photovoltaic cell absorbs the photons of light, which then knock electrons out of their orbits, creating a flow of electricity. The amount of electricity produced is proportional to the intensity of the light. The photovoltaic cell is commonly used in solar panels to generate electricity from sunlight. The efficiency of the photovoltaic cell is dependent on several factors, including the type of semiconductor material used, the purity of the material, and the thickness of the cell.
The photovoltaic cell has many applications, including in solar power generation, telecommunications, and remote sensing. The technique of photovoltaic detection is an important area of research, as it has the potential to provide a clean and renewable source of energy that can help mitigate climate change.
Learn more about Photovoltaic detection
Convert the following to SI units:_______. a. 9.12μs9.12μs b. 3.42 km c. 44 cm/ms d. 80 km/h
Answers
Answer:
Explanation:
A. We know that 1microsecond= 10^-6s
So = 9.12*10^-6=9.12*10^-6s
B 1km= 1000m
So 3.42km= 3240m
C.1ms= 10^-3s
And 1cm= 10^-2m
So 44*10^-2m/10^-3s=440m/s
D. 80km/hr= 80*1000/3600= 22.2m/s
Because 1km= 1000m
1hr= 3600s
A scientist claims that a certain chemical will make fabric waterproof. Which
option describes a controlled experiment that will produce evidence that will
support or refute her claim?
Answers
Answer: She adds different amounts of the chemical to the material and then puts them in the water
Explanation:
Answer: One group of fabric is treated with the chemical, and the other group is not. Then each group is exposed to water.
Explanation:
Which car has the most kinetic energy?
O 25 kg car driving at 30 kph
O 50 kg car driving at 30 kph
O 25 kg car driving at 60 kph
O 50 kg car driving at 60 kph
Answers
Which model best describes how gravity causes star formation?
A. Ocean waves hit a sand castle and cause it to collapse.
OB. A ball of clay is flattened when it hits the ground.
C. Water droplets drip down the outside of a cold window.
D. A paper ball becomes denser as a person squeezes it.
Answers
The best analogy for how gravity creates stars is when water drops fall from a chilly window onto a sand building, which eventually crumbles.
Why exactly does gravity have a force?Gravity, on the other hand, is a force inside the broadest sense since it characterizes the resultant interaction between two masses. Both the motion of objects through stretched spacetime and the warping of spacetime are the main origins of gravitational influence. The effect, however, appears to be the result of using force.
What factors determine gravity?This force's strength is influenced by the mass of the each object and the separation between their centers. According to mathematics, the gravitational pull of an object is directly proportional to its mass and inversely proportional to the square of its distance from another object.
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If the moon crossed the meridian at midnight what phase must the moon be in?
Answers
Answer:
Waxing Gibbous
Explanation:
New Moon Rises at sunrise, transits meridian at noon, sets at sunset
Explanation:
Two parallel copper rods supply power to a high-energy experiment, carrying the same current in opposite directions. The rods are held 8.0 cm apart by insulating blocks mounted every 1.5 m. If each block can tolerate a maximum tension force of 200 N, what is the maximum allowable current
Answers
Answer:
the maximum allowable current is 7302.967 amperl
Explanation:
The computation of the maximum allowable current is shown below;
Force F = mean ÷ 4π 2 I_1 I_2 ÷d × ΔL
200 N = (10)^-7 (2I × I) ÷ 0.08 × 1.5
200 = 3.75 × 10^-6 I^2
I = √200 ÷ √ 3.75 × 10^-6
= 7302.967 amperl
Hence, the maximum allowable current is 7302.967 amperl
Basically we applied the above formula
I You are driving down the road at 15.6 m/s (35 mph) when an ambu-
lance passes you with its siren blaring. The ambulance siren produces
a frequency of 700 Hz. As the ambulance approaches you from be-
hind, you hear a frequency of 740 Hz. (a) What is the speed of the am-
bulance? (b) What frequency do you hear after the ambulance passes?
Answers
The speed of the ambulance is 33.35 m/s and the frequency heard after the ambulance passes is 667.07 Hz.
Calculation:-
V = f(344 - 15.6/344 - vs)
740 = 700(344 - 15.6/344 - vs)
344 - V s = 70/74 (344 - 15.6)
344 - V s = 310.64
V s = 33.35 m/s
After pass
F = 700 ( 344 + 15.6/344 + 33.35)
= 700 × 359.6/377.35
F = 667.07 Hz
Frequency is the wide variety of occurrences of a repeating event in line with a unit of time. The time period frequency refers to the variety of waves that pass a set factor in unit time. It additionally describes the number of cycles or vibrations undergone for the duration of one unit of time with the aid of a body in periodic motion.
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Calculate the average speed
1) between 0 min and 3 min.
2) between 3 min and 5 min.
3) between 5 min and 10 min
4) between 0 min and 10 min
Answers
Answer:
000000000000000000000000000
What is the S-P difference (sec)?
What is the amplitude (mm)?
What is the distance (km)?
What is the magnitude (M)?
Answers
(a) The S-P difference of the wave is determined as is 40 sec.
(b) The amplitude of the wave is determined as is 10 mm
(c) The distance of the wave is determined as is 380 km
(d) The magnitude of the wave is determined as is 4.5
What is amplitude of a wave?The amplitude of a wave is the maximum displacement or distance that a wave moves from its rest position to its crest (the highest point) or trough (the lowest point). In other words, it is the measure of the strength or intensity of a wave.
Question 1:
From the graph, the S-P difference, that is between S and P = 40 s - 0 s
= 40 s
Question 2:
The distance (km) corresponding to 40 sec is 380 km.
Question 3:
The amplitude of the wave is the maximum displacement of the wave and it is equal to 10 mm.
Question 4:
The corresponding magnitude of the wave is 4.5.
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