a thin spherical metallic shell of radius 2.31 cm is has a charge of -3.1 uc uniformly distributed on its surface. what direction does the electric field point at a distance of 4.2 cm from the origin? a. there is no electric field b. radially outward c. tangential to the surface d. radially inward
Answers
The electric field's direction is radially inward because the charge is negative. Hence, the correct option is (d)
The given electric charge is -3.1uc, uniformly distributed over a thin spherical metallic shell with a radius of 2.31cm.
The electric field direction at a distance of 4.2cm from the origin can be found using Gauss's law.
The electric field is proportional to the electric charge enclosed by the spherical metallic shell within a closed surface.
The electric flux is defined as the electric field passing through the closed surface divided by the electric field.
For instance, The electric flux through a closed surface is proportional to the electric charge enclosed by that surface.
E is the electric field,
ΦE is the electric flux, and
Qenc is the electric charge enclosed by the surface in Gauss's law.
Here, the Gaussian surface is a sphere with a radius of 4.2cm.
We can calculate the electric field direction using the same formula as before, which is given by;
E = Qenc/4πε0r², where r = 4.2cm
Let's substitute the values and simplify = (-3.1 x 10⁻⁶)/(4π x 8.85 x 10⁻¹² x (4.2 x 10⁻²)²)E = -5.82 x 10⁴ N/C
Therefore, radially inward. The electric field is a vector field that exists around charged objects.
The field is proportional to the charge and inversely proportional to the distance between the charges.
A positive charge will emit electric field lines, whereas a negative charge will attract them. The electric field is represented by the letter E and is calculated in units of newtons per coulomb (N/C).
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Related Questions
The brakes on a car do 110,095J of work as they apply an average force of 8,450N. How far in meters does the car continue before stopping
Answers
13.02 meters
Explanation
the work done by the brakes makes the car stops, so the change in energy equals the work done
hence
\(\text{work}=\Delta Ek=\frac{1}{2}mv^2\)also, the work done by a force is given by
\(\text{work}=\text{ force}\cdot dis\tan ce\)then, let
\(\begin{gathered} \text{work}=\text{ 110095 J} \\ \text{Force}=8450\text{ N} \end{gathered}\)replace
\(\begin{gathered} \text{work}=\text{ force}\cdot dis\tan ce \\ 110095\text{ J=8450 N}\cdot distnace \\ \text{divide both sides by 8450 N} \\ \frac{110095\text{ J}}{\text{8450 N}}\text{=}\frac{\text{8450 N}\cdot}{\text{8450 N}}distance \\ 13.02m=\text{distance} \end{gathered}\)therefore, the answer is
13.02 meters
I hope this helps you
Which statement explains the polarity of a water molecule?
A. The oxygen side is partially positive because electrons are pulled toward the hydrogen side.
B. The oxygen side is partially negative because electrons are pulled toward the hydrogen side.
C. The oxygen side is partially positive because electrons are pulled toward the oxygen side.
D. The oxygen side is partially negative because electrons are pulled toward the oxygen side.
Answers
Answer:
D. The oxygen side is partially negative because electrons are pulled toward the oxygen side.
Explanation:
The water molecule is polar by the virtue of covalent bonds and the hydrogen bonds within and between its molecule.
The oxygen side is partially negative because the electrons are pulled toward the oxygen side.
Between oxygen and hydrogen that makes up the water molecule, oxygen is more electronegative.
An electronegative atom has more affinity for electrons. Since the electrons in the molecule of water is shared between hydrogen and oxygen, the more electronegative specie which is water draws the electron more to itself.
This leaves a net negative charge on the oxygen atom.
PLEASE HELP ASAP WILL GIVE BRAINLIEST
Answers
Answer:
Not testable.
Explanation:
The temperature of coffee can change, as the coffee gains or loses heat to the surroundings or the room temperature. For example, if you put a hot coffee in a cold room, the coffee will lose heat to the surroundings/room temperature, eventually making it colder.
Two identical steel columns are used to support a level beam. Heat Heat B Image not displaying? As Column A gets heated, what happens to the ball? It moves left along the beam It falls straight down from its current position It moves right along the beam Nothing A streetlight is in a windstorm that exceeds the design rating. E Wind direction Light pole C D Base (в Ground Image not displaying? Which is the most likely location for a crack to start? A B D E An air tank is exposed to ambient temperature. If you set the air pressure of the tank to 35 psi for a leak test and find that 24 hours later the tank's pressure has increased, what could've happened? The tank leaked The tank drew in additional air The ambient temperature increased The ambient temperature decreased
Answers
A vertical structural component called a steel column is employed in building to offer crucial support. They might transfer loads from beams, ceilings, floor slabs, or roof slabs to floors or foundations, or they might transport loads in compression.
Additionally, bending moments along cross-section axes may be present in steel columns. Explanation: Beam-column structural members are those that experience simultaneous heavy axial compressive loads and bending. Only the existence of eccentric load application, end moments, and transverse loads distinguishes a beam-column from a column. 3. Describe girt. They might transfer loads from beams, ceilings, floor slabs, or roof slabs to floors or foundations, or they might transport loads in compression. Additionally, bending moments near cross-section may exist in steel columns.
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a stone is dropped from a cliff at time t=0t=0t, equals, 0 and strikes the ground below. which of the following graphs best shows the velocity vvv of the stone after it is dropped?
Answers
When a stone is dropped from a cliff, it will be accelerated by the force of gravity. As a result, its velocity will increase over time until it hits the ground. The graph of the velocity v vs time t of the stone after it is dropped can be represented by a straight line that slopes downward which is the first graph.
Here, the correct graph that best shows the velocity v of the stone after it is dropped is the first graph, as it represents a straight line with a negative slope, which indicates that the velocity is decreasing over time. This corresponds to the stone's acceleration due to gravity as it falls toward the ground. Therefore, the correct option is (A) graph 1.The velocity of the stone can be determined by using the formula for velocity, which is given by:v = gtwhere:v = velocityg = acceleration due to gravityt = timeSince the stone is dropped from rest (i.e., initial velocity is zero), the velocity of the stone after it is dropped can be calculated as:v = gtAt t = 0, the velocity of the stone is:v = g(0) = 0Therefore, the initial velocity of the stone is zero. As time progresses, the velocity of the stone increases, and it hits the ground when the velocity reaches its maximum value.
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In the figure, four point charges lie on the corners of a square, with a fifth point charge {eq}q {/eq} located at the center. The two leftmost charges have the same negative charge {eq}q_n, {/eq} and the two rightmost charges have the same positive charge {eq}q_p {/eq}. Assume that the center charge {eq}q {/eq} is negative.a. What is the direction of the total electric force on the charge {eq}q {/eq} at the center of the square?b. What is the direction of the electric field at the center of the square, due to the four corner charges?
Answers
The direction of the total electric force on the charge q at the center of the square is downwards while at the center of the square, due to the four corner charges is inwards.
Given that the charge on a point at the center of square = q
The charge on leftmost points on the square = q_n
The charge on two rightmost points of square = q_p
If we assume that the charge on the center point of square is negative then,
a.) The direction of the total electric force on the charge q at the center of the square is downwards, that is towards the bottom of the square.
As the two leftmost charges have the same negative charge q_n and the two rightmost charges have the same positive charge q_p, they are repulsive to each other due to which the total electric force on the center charge q is a downward force while the direction of force on positive charges is upwards. Since the downward force is greater than the upward force, the total electric force is downwards.
b.) Due to the negative charge of the center charge q, the electric field from the two leftmost charges will be directed inward, and the electric field from the two rightmost charges will be directed outward. As the outward electric field is weaker than inward electric field, the net electric field at the center of the square will be directed inward.
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complete question: In the figure, four point charges lie on the corners of a square, with a fifth point charge q located at the center. The two leftmost charges have the same negative charge q_n, and the two rightmost charges have the same positive charge q_p. Assume that the center charge q is negative. a. What is the direction of the total electric force on the charge q at the center of the square? b. What is the direction of the electric field at the center of the square, due to the four corner charges?
PLEASE CAN PEOPLE HELP WITH MY STUFF I SUCK AT CONCENTRAITING IN SCHOOL
Answers
Answer:
maybe:)
Explanation:
it really just depends on the subject and grade for me, I'm good in history and writing!
Answer:
I can help what subject and grade do you need help with?
Explanation:
Im in 8th so anything above 8th i cant help with sorry!
How does the Coriolis effect impact the Gulf Stream and the Brazil Current?
Answers
Answer: The Coriolis effect results in bending the direction of surface currents to the right in the Northern Hemisphere and left in the Southern Hemisphere. The Coriolis effect causes winds and currents to form the circular patterns. The direction in which they spin depends upon the hemisphere in which they are present.Coriolis Effect is named after the French mathematician and physicist Gaspard-Gustave de Coriolis. It affects the weather patterns of an area, it affects the ocean currents, and it also affects air quality.
hat is the speed of a water wave of frequency 2 hz and wavelength 1.0 m ?
Answers
The speed of a water wave can be determined by multiplying the frequency by the wavelength.
Therefore, the speed of a water wave with a frequency of 2 Hz and a wavelength of 1.0 m is 2 m/s. This is because frequency is the number of complete waves that pass a given point in one second, and wavelength is the distance between two consecutive crests or troughs of a wave.
By multiplying these two values, we can calculate the speed of the wave. In this case, the wave travels at a speed of 2 meters per second. It is important to note that the speed of a wave depends on the properties of the medium through which it travels. Water waves, for example, travel at different speeds depending on factors such as the depth of the water, the temperature, and the salinity of the water.
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What force pulls objects toward each other because of their masses?
Answers
Answer:
Gravity force
Explanation:
Answer:
grav force
Explanation:
______cal of heat are required to increase the temperature of a 100 g block of lead by 5.00 °C. The specific heat of lead is 0.0305 cal/g.°C. a) 15.3 b) 3.05. c) 0.153. d) None of the above.
Answers
To increase the temperature of a 100 g block of lead by 5.00 °C, the amount of heat required can be calculated using the specific heat of lead. The correct answer is 15.3 cal (option a).
The amount of heat required to increase the temperature of a substance can be calculated using the formula:
Q = m * c * ΔT
where Q is the heat energy, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature.
In this case, we have a 100 g block of lead with a specific heat capacity of 0.0305 cal/g.°C and a temperature change of 5.00 °C. Plugging these values into the formula, we get:
Q = (100 g) * (0.0305 cal/g.°C) * (5.00 °C) = 15.3 cal
Therefore, 15.3 cal of heat are required to increase the temperature of the 100 g block of lead by 5.00 °C. This corresponds to option a) 15.3.
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The Law of Conservation states that energy ____ be created of destroyed, but ___
Answers
Answer:
Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another.
Explanation:
hope this helps
a 6.5 kg object is suspended by a string from the ceiling of an elevator. the acceleration of gravity is 9.8 m/s 2 . determine the tension in the string if it is accelerating upward at a rate of 2.6 m/s 2 . answer in units of n. answer in units of n.
Answers
The rightward directions she gives are as follows: 1. Move 400 meters to the northwest. 3. The wealth is hidden there, 700 meters to the east-southeast.
What else do u mean by 9.8m s2 of acceleration caused by gravity?This means that anything is pushed toward the center of the earth, which causes the pulled object to accelerate by 9.8 meters per second as it "falls" to the earth. As a result, each second that such a body is dragged towards the earth, its velocity (speed with direction) increases by around 9.8 meters per second.
Is the gravity always 9.8 inches?It should be remembered that gravitation is not a continuous force; gravity weakens the more you are from the center of the Earth. Since it fluctuates from 9.83 at the poles to 9.78 at the equator, it isn't even a consistent at the surface. Due to this, we utilize an average value of 9.8.
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Sound waves are longitudinal waves and are also called _____ waves.A.electromagneticB.mechanicalC.transverseD.surface
Answers
ANSWER:
B. mechanical
STEP-BY-STEP EXPLANATION:
Sound or sonic waves are a mechanical waves created by a vibrating object.
So the correct answer is B. mechanical
If a motorcycle accelerates too rapidly, its front wheel will rise up off the pavement. During this stunt the pavement is exerting a forward frictional force on the rear wheel. How does that frictional force cause the front wheel to rise?.
Answers
When a motorcycle accelerates too rapidly, its front wheel will rise up off the pavement. During this stunt, the pavement is exerting a forward frictional force on the rear wheel.
The frictional force causes the front wheel to rise because of the displacement of the weight of the motorcycle. The force exerted by the rear wheel as the motorcycle accelerates is much greater than the force exerted by the front wheel, which results in an unbalanced torque. Because of this imbalance, the weight of the motorcycle is displaced from the rear to the front, causing the front wheel to lift off the ground. As a result, the motorcycle's center of gravity is shifted, causing the front end to become unstable. If the rider is not careful and does not adjust to the situation, the motorcycle can flip over. The angle between the tire and the ground changes because of the weight transfer, and the wheel begins to lose traction and lift off the ground.
The conclusion is that the frictional force exerted on the rear wheel due to rapid acceleration causes the displacement of the weight of the motorcycle, which causes the front wheel to lift off the ground.
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Question 10 (2 points)
Which of the following types of waves has more energy than an X-ray?
Microwaves
Radio waves
Visible light
Gamma rays
Answers
Answer:
gamma rays
Explanation:
Answer:
D. Gamma Rays
Explanation:
A person with M1=65kg stands at the left end of a uniform beam with mass M2= 106kg and a length L=3.8m. Another person with mass M3=70kg stands on the far right end of the beam and holds a medicine ball with mass M4=16kg (Assume that the medicine ball is at the far right end of the beam as well). Let the origin of our coordinate system be the left end of the original position of the beam as shown in the bellow drawing and also assume there is no friction between the beam and floor.1) What is the center of mass of the system? 2) The medicine ball is thrown to the left end of the beam and caught. What is the location of the center of mass now?3) What is the new x-position at the left end of the beam? (How far did the beam move when the ball was thrown from person to person).4) To return the medicine ball to the other person, both people walk to the center of the beam. At what x-position do they end up?
Answers
We have the next information
5. Susan exerted 400 newtons of force while pushing on a huge boulder. The boulder moved 0 meters. Calculate work.
Answers
Answer:
0 J
Explanation:
Work is the product of force and distance in the direction of force.
The formula is ; Work = Force * Distance
Given that :
Force = 400 N
Distance = 0 meters
Work = 400 * 0 = 0 J
No work was done because the boulder did not move.
Suppose the 1.3 km main span of steel for the Golden Gate Bridge had no expansion joints. How much longer (in meters) would the bridge be for an increase of 70C? It is assumed your answer will be in meters.
αsteel=11x10-6/C
Answers
The bridge increase at 70C is 7.7*\(10^{-11}\) m. when Golden Gate Bridge longer (in meters) would the bridge be for an increase of 70C.
How long are the Golden Gate Bridge's principal cables?With a diameter of little over three feet, 7,659 feet in length, and 27,572 parallel wires, each of the two major cables is composed. The Golden Gate employs the world's longest bridge cables, which at the equator could circle the globe more than three times.
From one end to the other, how far is the Golden Gate Bridge?To cross the Golden Gate Bridge, how long does it take? Walking each direction takes roughly 35 minutes because the bridge is 1.7 miles long.
Change of Length: ΔL= aΔT
[remember that the product of ΔL must then be multiplied by the length of the steel bridge (1.3K)]
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Suppose you have a pendulum clock that keeps correct time on Earth (acceleration due to
gravity = 9.8 m/s
2
). Without changing the clock, you take it to the Moon (acceleration due to
gravity = 1.6 m/s
2
). For every hour interval (on Earth) the Moon clock will record
Answers
A car is driving 55 miles per hour east. The car changes direction to head north but still travels at 55 miles per hour. Which is true?
The car is following Newton's third law of motion.
The car is not accelerating.
The car is accelerating.
Answers
The car is accelerating (during the short time that it's turning from East to North).
ANY change in speed or direction of motion is acceleration. Since the car is changing direction, it is accelerating, even though its speed is constant.
True or False? Circulation, sensation, and movement should be checked before you apply any splint and afterwards only if the victim reports a problem
Answers
It is accurate to say that circulation, sensation, and movement should be checked before applying any splint, and afterward, only if the victim reports a problem.The given statement is true.
It is true that circulation, sensation, and movement should be checked before you apply any splint, and afterward, only if the victim reports a problem. Splinting is a procedure that involves immobilizing a broken bone in order to aid in its recovery. The goal of splinting is to immobilize the affected limb so that it is unable to move.
It is, however, critical that a first aider evaluate the circulation, sensation, and movement of the affected limb before applying the splint. This will ensure that the splinting procedure does not cause more harm than good if there is already damage that could be exacerbated
The best way to treat fractures and breaks is to stabilize the injury site to prevent further damage. Splinting is a technique for immobilizing a broken bone or limb that is both effective and easy. It's critical to examine the injured limb for circulation, sensation, and movement before applying a splint to ensure that the injury isn't made worse. After a splint has been applied, the injured person's circulation, sensation, and movement should be checked again only if they report a problem. Finally, if there is any question about the severity of the injury, it is advisable to seek medical attention immediately.The given statement is true.
Therefore, it is accurate to say that circulation, sensation, and movement should be checked before applying any splint, and afterward, only if the victim reports a problem.
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A natural draft hyperbolic cooling tower draws air in at a rate of 150,000 mgfs, through a flow area of 940
m2. What must be the pressure just inside the cooling tower? (3 marks) Question based on:
be provided with solution>; air flowrate based on [4].
Answers
The pressure just inside the natural draft hyperbolic cooling tower must be determined based on an air flow rate of 150,000 mgfs and a flow area of 940 m2.
To calculate the pressure just inside the cooling tower, we can use the equation for mass flow rate:
Mass flow rate = density × velocity × area
Given that the mass flow rate (m) is 150,000 mgfs (mgfs stands for "metric gallons per minute"), and the flow area (A) is 940 m2, we need to convert mgfs to a standard unit of flow rate such as kg/s.
1 mgfs = 0.06308 kg/s
Therefore, the mass flow rate in kg/s is:
m = 150,000 mgfs × 0.06308 kg/s = 9,462 kg/s
Next, we need to consider the density of the air (ρ). At standard conditions (typically 20°C and 1 atm), the density of air is approximately 1.2 kg/m3.
Using the equation for pressure (P) and rearranging the mass flow rate equation, we have:
P = m / (ρ × A)
Substituting the known values:
P = 9,462 kg/s / (1.2 kg/m3 × 940 m2)
Simplifying:
P = 7.917 atm
Therefore, the pressure just inside the cooling tower must be approximately 7.917 atm
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Samuel was out riding his bicycle with his friends. He noticed
the clouds were very grey. The temperature outside was -3°C.
What would be the most likely form of precipitation that may
occur?
15 points!
Answers
Answer:
The most likely form of precipitation that may occur when the clouds are very grey and the temperature outside is -3°C is snow.
Explanation:
1. Who were the first three countries to build rocket engines?
O Russia, Germany, China
O Germany, China, Canada
O Russia, USA, Germany
O USA. China, Russia
Answers
Answer:
i think its Russia, USA, Germany.
The total initial momentum of a bat and ball is +80 kg•m/s before they collide. If the ball’s final momentum after the collision is +72 kg•m/s, determine the bat’s change in momentum. Express answer to 2 significant figures.
Answer: --------- kg m/s
Answers
The momentum of the van after the collision will be -9600 kg m/s.
What is momentum?Momentum is a concept in physics that is used to describe an object's resistance to changes in motion. It is based on the principle of inertia, which states that an object will remain in a state of rest or constant motion unless acted upon by an outside force. Momentum is calculated by multiplying the mass of an object by its velocity. Momentum is a vector quantity, meaning that it has both magnitude and direction. Momentum is also conserved, meaning that the total momentum of any closed system remains constant.
Momentum is a measure of an object's mass multiplied by its velocity. Before the collision, the momentum of the van was 9600 kg m/s (80kg x 72m/s). After the collision, both vehicles will be travelling in the opposite direction, meaning that the momentum of the van will be the same as before, but in the opposite direction. Therefore, the momentum of the van after the collision will be -9600 kg m/s. The change in momentum, or delta momentum, of the van after the collision is the difference between the before and after momentum, or 9600 kg m/s.
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What happens to
light when it is
transmitted?
Answers
When light is transmitted through an object things can happen. The light could be reflected by the thing. Or it could be absorbed by the object. Saying this based on what I know.
PLZZZZ HELP QUICK . 30 points. Emma weighs 560 N, she has decided to stay in shape so she is working out every morning, This morning she ran and lifted weight! 1. Calculate Emma's mass ( Gravity g= 9.8 N/kg). 2. If she ran 350 meters in 65 seconds, what was her velocity? 3. When she lifted weights, she exerted a 35 N to lift one of the weight 2 meters over the ground, what is the amount of work she performed? Note that units are important, so do not give any number without a unit to avoid losing points.
Answers
Force equals mass time acceleration. Weight is a force and it can replace force in the equation. The acceleration would be gravity, which is an acceleration.
1.)
Fw (weight) = m (mass) · g (gravity, 9.8 m/s²)
Fw = m * 9.81 m/s²
560N = m · 9.81 m/s²
m ≈ 57.08 kg
2.)
d = 350 meters
t = 65 seconds
velocity = d/t
velocity = 350 meters / 65 seconds
velocity ≈ 5.38 meters/sec
3.)
Force = 35N
Distance = 2 meters
Work = Force · Distance
Work = 35N · 2 meters
Work = 70 J
A large bulk quantity is defined as 3,000 kg (6,614 lbs.) for solids and 3,000 liters (792 gallons) for liquids and gases in a single package.
Answers
The given statement "A large bulk quantity is defined as 3,000 kg (6,614 lbs.) for solids and 3,000 liters (792 gallons) for liquids and gases in a single package" is true.
What is large bulk quantity?
Each person who carries one or more of the hazardous items must create and follow a transportation security plan for hazardous materials that complies with the requirements of safety and security plans section.3,000 kilograms (6,614 lbs) or 3,000 liters (792 gal) or more of solids or liquids in a single container, such as a cargo tanker, portable tank, tank car, or other bulk container, is referred to as a "large bulk quantity."The security plan must include an evaluation of transportation security risks for shipments of the dangerous goods listed in §172.800, including site-specific or location-specific risks connected with facilities where the dangerous goods listed in §172.800 are prepared for transportation, stored, or unloaded incidentally to movement, and suitable countermeasures to the evaluated risks.Learn more about the Hazardous bulk with the help of the given link:
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What is sin1(0.61)?
Α. 52.40
Ο Β. 31.40
Ο Ο Ο Ο
C. 62.5o
Ο D. 37.69
Answers
36.9
explanation
We want to find
sin^{-1}(0.61)sin
−1
(0.61)
We can use at least a scientific calculator to find the value of the given expression.
The sine inverse function is a secondary function.
So you press SHIFT then press Sin
to access the sine inverse function and then type 0.61 in it.
Close the parenthesis and press "="
This will give you the value.
sin^{-1}(0.61)=37.5895sin
−1
(0.61)=37.5895
We round to the nearest tenth to get,
sin^{-1}(0.61)=37.6\degreesin
−1
(0.61)=37.6°