Two point charges Q₁ = +6.00 nC and Q₂ = -2.00 nC are separated by 45.0 cm.
(a) What is the electric potential at a point midway between the charges?
V
(b) What is the potential energy of the pair of charges?
J
What is the significance of the algebraic sign of your answer?
Positive work must be done to separate the charges.
Negative work must be done to separate the charges.
Answers
Answer:
(a) The electric potential at a point midway between the charges is 160 V.
(b) The potential energy of the pair of charges is -2.4x10⁻⁷ J.
What is electrical potential energy?
The effort necessary to assemble a system of point charges by bringing them close together, as in the system from an infinite distance, is defined as the electric potential energy of the system. Alternatively, the electric potential energy of any given charge or system of charges is defined as the total work performed by an external agent in moving the charge or system of charges from infinity to the current configuration without acceleration.
Explanation:
The electric potential at a point between two point charges Q₁ = +6.00nC and Q₂ = -2.00 nC separated by 45.0 cm is found to be 160 V and the potential energy of the pair of charges is -2.4 x 10⁻⁷ J.
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Related Questions
solve ~
\(13x - 26 + 39 = 0\)
ty! :)
Answers
Explanation:
13x - 26 + 39 = 0
13x=26-39
13x=-13
x= -1
\(13x-26+39=0\\\\\implies 13x +13 = 0\\\\\implies 13x = -13\\\\\implies x = -\dfrac{13}{13}\\\\\implies x = -1\)
a car is moving at 12 m/s and has a mass of 600 kg what is the. kinetic energy of the car?
Answers
Answer:
43200 J
Explanation:
(1/2(mass)) (speed)^2
Calculate the quantity of heat energy which must be transferred to 2.25 kg of brass to raise its temperature from 20°C to 240°C if the specific heat of brass is 394 J/kgK.
Answers
The quantity of heat energy that must be transferred to 2.25 kg of brass to raise its temperature from 20 °C to 240 °C is 195030 J
How do i determine the quantity of heat energy?First, we shall list out the given parameters from the question. This is shown below:
Mass of brass (M) = 2.25 Kg Initial temperature of brass (T₁) = 20 °CFinal temperature of brass (T₂) = 240 °CChange in temperature of brass (ΔT) = 240 - 20 = 220 °CSpecific heat capacity of brass (C) = 394 J/kgKQuantity of heat energy (Q) =?The quantity of heat energy that must be transferred can be obtained as follow:
Q = MCΔT
= 2.25 × 394 × 220
= 195030 J
Thus, we can conclude quantity of heat energy that must be transferred is 195030 J
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A forklift pushes a box with a force of 500 N across the floor for a distance of 5.0 m, then turns around and pushes with the same force 5.0 m back to its original position. How much work did the forklift do during this time?
Answers
Answer:
5,000J
Explanation:
Work = Force x Distance
Distance back and forth is canceled out, so either the answer is + or -
5.0m + 5.0m = 10.0m
500N x 10.0m = 5,000J
A
car accelerates from rest at 4.5 m/s² for 3 seconds.
a. What is the car's velocity after 3 seconds?
b. What distance does the car travel in the 3 seconds?
m/s
Answers
A car accelerates from rest at 4.5 m/s² for 3 seconds, the car's velocity after 3 seconds is 13. 5 m/s
The distance the car travel in the 3 seconds is 40. 5m/s
The first equation of motion is v = u + a t. It explains the relationship between velocity and time.
V = Final velocity
u = Initial velocity
a = acceleration
t = time.
How to determine the velocity
When an object is brought to rest or moves from resting, U, initially velocity equals 0.
From the formula,
V = u + at
V = ?
u = 0, because the object was at rest.
a = 4. 5 m/ s²
t = 3 seconds
Velocity, V = 0 + 4. 5 × 3
Velocity , V = 0 + 13. 5
Velocity, V = 13.5 m/s²
How to determine the distance
Velocity = Distance ÷ time
Velocity, V = 13. 5 m/s²
time = 3 seconds
distance = ?
Distance = Velocity × time
Distance = 13. 5 × 3
Distance = 40. 5 m
Therefore, the car's velocity after 3 seconds is 13. 5 m/s² and the distance the car travels after 3 seconds is 40. 5m
A ball is tossed straight up from the surface of a small, spherical asteroid with no atmosphere. The ball rises to a height equal to the asteroids radius and then falls.
What forces if any act on the ball while it is traveling up?
A: Only a decreasing gravitational force that acts downward
B: Only a constant gravitational force that acts downward
C: Both a constant gravitational force that acts downward and a decreasing force that acts upward
D: No forces act at all
A: Only a decreasing gravitational force that acts downward
Answers
From Newton's gravitational law, the force between two objects (a planet) is directly proportional to the product of their masses and inversely proportional to the square of their distance apart.
What does gravity mean?The force of attraction between any two bodies is directly proportional to the product of their masses and is inversely proportional to the square of the distance between them, according to Newton's universal law of gravitation.
What is the name of Newton's law of gravity?Every particle in the cosmos attracts every other particle with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between their centers, according to Newton's law of universal gravitation.
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Plants that respond to light are responding
to an:
a. internal stimulus
b. external stimulus
please answer
Answers
Answer:
The answer would be a
Explanation:
Which lists three organic biological molecules?
O carbohydrates, salts, metals
O salts, proteins, minerals,
O proteins, lipids, carbohydrates
O lipids, metals, minerals
Answers
Answer:
B
Explanation:
I'm learning it in science.
Answer:
its not b i just took the test and b was wrong
Explanation:
A cat jumps up and sits on the lap of a woman who is sitting in the chair. The cats weight is 40 newtons. What is the reaction force provided by the chair now?
Answers
Answer:
540 newtons.The weight of the chair is 90 N. Action-reaction pairs include the cat-woman’s lap, the woman- chair, the chair-strongman, and the strongman-ground.
Explanation:
pls give brainliest
____is a measure of the random motion of particles. ____is the transfer of energy between two objects due to temperature difference.
Answers
Temperature is a measure of the random motion of particles and heat is the transfer of energy between two objects due to temperature difference.
What do you call a measure of particle movement?
Temperature can be used to calculate the kinetic energy of particles moving within a substance, or, to put it another way, a substance's temperature affects the kinetic energy of its particles.Because molecules in a system move randomly, thermal energy also known as random or internal kinetic energy is produced.In joules, heat is measured (J). Heat is a form of energy transfer, which explains this. In degrees Celsius (°C), temperature is a unit of measurement for how hot or cold a substance feels. Temperature is a gauge for an object's average particle kinetic energy.To know more about temperature visit:
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A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 290 N applied to its edge causes the wheel to have an angular acceleration of 0.854 rad/s2.
(a) What is the moment of inertia of the wheel?
kg · m2
(b) What is the mass of the wheel?
kg
(c) If the wheel starts from rest, what is its angular velocity after 5.80 s have elapsed, assuming the force is acting during that time?
rad/s
Answers
Answer:
c
Explanation:
units c mark me brainless k
Topic Gravitational force amd firld strength.. help me please
Answers
The gravitational force between m₁ and m₂ has magnitude
\(F_{1,2} = \dfrac{Gm_1m_2}{x^2}\)
while the gravitational force between m₁ and m₃ has magnitude
\(F_{1,3} = \dfrac{Gm_1m_3}{(15-x)^2}\)
where x is measured in m.
The mass m₁ is attracted to m₂ in one direction, and attracted to m₃ in the opposite direction such that m₁ in equilibrium. So by Newton's second law, we have
\(F_{1,2} - F_{1,3} = 0\)
Solve for x :
\(\dfrac{Gm_1m_2}{x^2} = \dfrac{Gm_1m_3}{(15-x)^2} \\\\ \dfrac{m_2}{x^2} = \dfrac{m_3}{(15-x)^2} \\\\ \dfrac{(15-x)^2}{x^2} = \dfrac{m_3}{m_2} = \dfrac{60\,\rm kg}{40\,\rm kg} = \dfrac32 \\\\ \left(\dfrac{15-x}x\right)^2 = \dfrac32 \\\\ \left(\dfrac{15}x-1\right)^2 = \dfrac32 \\\\ \dfrac{15}x - 1 = \pm \sqrt{\dfrac32} \\\\ \dfrac{15}x = 1 \pm \sqrt{\dfrac32} \\\\ x = \dfrac{15}{1\pm\sqrt{\dfrac32}}\)
The solution with the negative square root is negative, so we throw it out. The other is the one we want,
\(x \approx 6.74\,\mathrm m\)
Use the drop-down menus to complete each sentence.
The number of half-lives changes. This is the _______ variable.
The number of radioactive atoms changes due to the number of half-lives. The number of radioactive atoms is
therefore the _______
variable.
Answers
Answer:
Independent, then dependent
Explanation:
Just took this on Edge 2021
What is the real reason the skies blue
Answers
Answer:
Rayleigh scattering
Explanation:
The blue color of the sky is due to a phenomenon called Rayleigh scattering. When sunlight enters the Earth's atmosphere, the shorter blue wavelengths of light are scattered more than the other colors by the tiny molecules of nitrogen and oxygen in the air. This causes the blue light to be redirected in many different directions, making the sky appear blue to our eyes. The other colors of light are scattered as well, but to a lesser extent, which is why the sky appears blue instead of a mixture of all colors. This effect is also the reason why the sun appears more yellow, orange or red during sunrise or sunset, when its light has to travel through more of the Earth's atmosphere before reaching our eyes, causing the shorter blue wavelengths to be scattered even more, leaving behind the longer wavelengths of light.
Hand pushes on a table with a force of 35n forward.reaction force
Answers
Answer:
como ías
Explanation:
A 1,120 kg car is traveling with a speed of 40 m’s .find it.s energy
Answers
Answer:
896000 Joule.
Explanation:
Solution,
Given,
Mass (m) = 1,120 kg.
Velocity (v) = 40 m/s.
Now,
Kinetic Energy = 1/2mv²
= 1/2 × 1,120 × 40²
= 896000 Joule.
34. Two students, Tom and Jerry devise a plan to determine the coefficient of friction between socks and freshly waxed floors at the school. Tom (60kg) pulls Jerry (75kg) with a force of 185N to get him to start sliding across the floor.a) What is the magnitude of the force that Jerry exerts on Tom? b) What is the normal force of Jerry from the surface? c) What is the coefficient of static friction between the socks and the waxed floor?
Answers
a.
By Newton's third law we know that every action has an equal but opposite reaction, in this situation this means that if Tom pulls Jerry with a force of 185 N, then Jerry pulls Tom with equal force but in opposite direction.
Therefore the magnitude of the force that Jerry exerts on Tom is 185 N.
b.
The normal force is defined as the force that any surface exerts on an object. In this case the normal force exerted on Jerry has to be equal to its weight, this is consequence of Newton's third law: If Jerry exerts its weight on the surface then the surface exerts a force with the same magnitude but in opposite direction; and by definition this is the normal force. Hence we have:
\(\begin{gathered} N=W \\ N=mg \\ N=(75)(9.8) \\ N=735 \end{gathered}\)Therefore the normal force exerted on Jerry is 735 N
c.
The force of static friction fullfils the following relation:
\(f_s\leq\mu_sN\)and it is equal when the force applied to the object is enough for the object to start moving.
In this case we know that the force applied is enough for Jerry to start sliding across the floor, this means that in this case we have that:
\(f_s=\mu_sN\)Since Jerry is starting to slide this means that the force of friction is equal to the force applied, then we have:
\(\begin{gathered} 185=735\mu_s \\ \mu_s=\frac{185}{735} \\ \mu_s=0.252 \end{gathered}\)Therefore, the coeeficient of static friction is 0.252 (rounded to three decimal plances)
Please answer it thank you
Answers
Answer:
Sound is the correct answer
What is TRUE about the use of drawings at a crime scene?
O A. Drawings are no longer used because photography is more precise.
OB. Only when a camera is not immediately available should a sketch be made.
O c.
It is common practice for investigators to make a sketch of a crime scene.
OD. Investigators are trained in how to make a quality finished sketch of a scene.
Answers
Answer:
A. Drawings are no longer used because photography is more precise.
Explanation:
It is common practice for investigators to make a sketch of a crime scene.
Creating sketches of crime scenes is a common practice among investigators, as it provides valuable visual documentation that complements photographs and written notes. While photography is an important tool for capturing detailed and precise information, sketches offer unique advantages that contribute to the overall understanding of the crime scene.
Sketches can provide a clear and organized representation of the spatial relationships, distances, and dimensions within the crime scene. They can accurately depict the layout of the area, the position of evidence, the location of key objects, and other relevant details that may not be fully captured by photographs alone.
Additionally, sketches allow investigators to emphasize specific features or elements that are essential to the case. This can aid in explaining the sequence of events, the movement of individuals or objects, and other dynamic aspects of the crime scene.
While digital photography is widely used today, sketches remain valuable for scenarios where a camera may not immediately be available, when capturing certain angles or perspectives is challenging, or when highlighting specific details is necessary.
Investigators are trained in creating accurate and detailed sketches that adhere to professional standards. This includes ensuring accurate measurements, using appropriate scale ratios, labeling key features, and maintaining object proportions. Sketched crime scene diagrams are often included in official investigative reports and court proceedings to provide a comprehensive visual representation of the crime scene, enhancing the communication of information among investigators, legal professionals, and jurors.
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An object is placed at 0 on a number line. It moves 3 units to the right, then 4 units to the left and then 6 units to the
right. What is the displacement of the object?
1
5
7
13
Answers
Answer:
5
Explanation:
when you move 3 unit to the right your object is at 3.then when you move 4 units to the left your object is at -1 because
a number line also has negative numbers.Then if you move 6 units your object is at 5
One factor that all psychologists have in common is _____________.
A. the same advanced degree
B. the interest in educational psychology
C. the same undergraduate degree
D. the interest in the study of the human mind and behavior
FOR PSYCHOLOGY! PLEASE HELP!!
Answers
Answer: D
Explanation: Tell me if it's correct of not. That's the only one I think would be right besides B.
PLZ FAST!!
Compare and contrast microscopic and macroscopic energy transfer. Give at least three comparisons for each. THX
Answers
Answer:
Macroscopic energy is energy at a level of system while microscopic energy is energy at the level of atoms and molecules
Explanation:
1. Macroscopic energy is possessed by a system as whole while microscopic energy is possessed by its constituents’ atoms or molecules.
2. The common form of macroscopic energy is Kinetic and potential energy while the microscopic form of energy are atomic forces due its random, disordered motion and due to intermolecular forces
3. At microscopic level we consider behaviour of every molecule and in macroscopic approach we consider gross or average effects of various molecular infractions
sound travels through metal at a speed of about 6 kilometers per second. At this rate sound would take about 12 minutes to travel from New York City to LA along a metal wire. How can people in these cities have a normal.conversation over the phone.
Answers
While it is true that sound travels through metal at about 6 kilometers per second, phone conversations between New York City and LA do not rely on the physical transmission of sound waves through a metal wire.
How does phone communication work?Instead, phone calls are sent as electrical signals across a network of microwave towers, satellites, and fiber-optic cables that is connected to each other. The speed of sound through metal is substantially slower than the speed of electrical impulses, which move at the speed of light.
Due to the fact that electrical impulses can travel far quicker than sound through metal, residents in these cities are able to hold a regular conversation over the phone.
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What frequency (in Hz) is received by a person watching an oncoming ambulance moving at 100 km/h and emitting a steady 800 Hz sound from its siren
Answers
Answer:
Explanation:
Assuming speed of sound is 343 m/s
100 km/h = 28 m/s
f = 800•(343 + 0) / (343 - 28) = 871 Hz
How do I find the mass in kg
Answers
To find the mass in kilograms, you need to know the object's weight in newtons and the acceleration due to gravity. The formula for finding mass is mass = weight / acceleration due to gravity. So if you have an object with a weight of 100 N and the acceleration due to gravity is 9.8 m/s^2, the mass would be 10.204 kg.
The mass of the block is 0.025 kg or 25 g, when the spring has k = 28 N/m, and compresses 0.11 m before bringing the block to rest.
When a block is dropped onto a spring with k=28 N/m, the block has a speed of 3.2 m/s just before it strikes the spring. If the spring compresses an amount of 0.11 m before bringing the block to rest, what is the mass of the block?The formula for the spring potential energy is given as follows; PE = (1/2) kx² where k is the spring constant and x is the amount of deformation of the spring. Substituting the values given;PE = (1/2) 28 (0.11)²PE = 0.16972 J. According to the law of conservation of energy, the potential energy stored in the spring at maximum compression is equal to the kinetic energy the block had before it struck the spring;KE = (1/2) mv²where m is the mass of the block and v is its velocity.Substituting the values;0.16972 = (1/2) m (3.2)²m = 0.025 kg or 25 gTherefore, the mass of the block is 0.025 kg or 25 g.For more questions on mass
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Please help! Due in 5 min! I will pick brainiest! Thanks! YOU ROCK!
The resistance of an electric stove burner element is 11 ohms. What current flows through this
element when it runs off a 220 volt line?
Answers
Answer:
Current flow I = 20 ampere
Explanation:
Given:
Resistance R = 11 ohms
Voltage V = 220 volts
Find:
Current flow I
Computation:
Current flow I = V / R
Current flow I = 220 / 11
Current flow I = 20 ampere
The amount of current flow through the element is of 20 A.
Given data:
The magnitude of resistance of Electric stove is, R = 11 ohms.
The magnitude of potential difference in a line is, V' = 220 V.
Here we can simple go for Ohm's law. As per the Ohm's law, the potential difference across the element is proportional to the current flow and the resistance of the element.
The expression is,
V' = I × R
here, I is the amount of current flowing through the element.
Solving as,
220 = I × 11
I = 20 A
Thus, we can conclude that the amount of current flow through the element is of 20 A.
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What do you know about the current at different points in a series circuit?
A)it increases the farther it gets from the battery
B)it decreases the farther it gets from the battery
C)it decreases based on the resistance of the devices
D)it is the same at all points in the circuit
Answers
Answer:
D
Explanation:
In a series circuit there is only one path for the current to complete the path....so D
A horse pulls a sled 100 meters. The horse applies 200 newtons of force. How many joules of work did the horse do?
Please hurry and help
Answers
Explanation:
work done = force × distance
= 200N × 100m
= 20000J
= 20KJ
A 15 year old boy requires eyeglasses with lenses of 2 diopters power in order to read a book at 25 cm. Five years later he finds that while wearing the same glasses, he must hold a book 40 cm from his eyes. What power of lenses does he require at 20 years in order to read a book at 25 cm?
Answers
At 20 years old, the boy would require eyeglasses with lenses of approximately -1.49 diopters power in order to read a book at 25 cm.
How to solve for the power of lenses1/f1 = 1/v - 1/u1
1/f1 = 1/∞ - 1/0.25 (converting 25 cm to meters)
1/f1 = 0 - 4
1/f1 = -4
f1 = -1/4
f1 = -0.25 meters
The initial lens power (P1) is the reciprocal of the focal length:
P1 = 1/f1
P1 = 1/-0.25
P1 = -4 diopters
Now let's calculate the final focal length (f2) using the final distance (v2) of 40 cm:
1/f2 = 1/v2 - 1/u1
1/f2 = 1/0.40 - 1/0.25
1/f2 = 2.5 - 4
1/f2 = -1.5
f2 = -1/1.5
f2 = -0.67 meters
The final lens power (P2) is the reciprocal of the focal length:
P2 = 1/f2
P2 = 1/-0.67
P2 ≈ -1.49 diopters
Therefore, at 20 years old, the boy would require eyeglasses with lenses of approximately -1.49 diopters power in order to read a book at 25 cm.
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Two Styrofoam blocks are brought near each other and are observed to repel each other. Each block has the same amount of charge on it. Which statement is true about this situation? A)the charge on each block must be positive B)the charge on each block must be negative C)the blocks are creating magnetic fields from non moving electric charges D)each block has the same kind of charge but we don't' know what kind it is
Answers
ANSWER:
D)each block has the same kind of charge but we don't' know what kind it is
STEP-BY-STEP EXPLANATION:
Two charges of the same type always repel each other.
In this case, it is not possible to know what type of load they are, only that they are the same.
Therefore, the correct answer is:
D)each block has the same kind of charge but we don't' know what kind it is