In the diagram shown above, the circles represent small balls that have
electric charges. Ball 1 has a negative charge, and ball 2 is repelled by ball 1
Next, you see that ball 2 repels ball 3 and that ball 3 attracts ball 4. What is
the electric charge on ball 4?
Ball 4 may have either a positive or negative charge,
Ball 4 has a negative charge.
Ball 4 has a positive charge.
Answers
Answer:
ball 4 has a positve charge
Explanation:
-Ball 2: is negative because it is repelled by ball one (like signs repel)
- ball 3: is also negative because it is repelled by ball one (like signs repel)
- Ball 4: is positive because it is attracted by ball 3 (opposite signes attract)
Related Questions
Temperature
Energy Input
The three states of matter are modeled in the heatind cu
curve seen here. Identify ALL of the changes that must take place for a
substance to change state, from a solid to a gas.
A)
Pressure increases
B)
Temperature increases
19
7
Particles spread apart
D)
Kinetic energy increases
E)
Particle motion increases
Answers
Answer:
Particles spread apart, temperatue increases, pressure increases
Explanation:
An object moving at a constant velocity accelerates at a constant rate of 2.5 m/s2 for a distance of 30 m. At the end of the acceleration the object has a velocity of 90 m/s. What was its velocity before accelerating?
Answers
Answer:
The initial velocity is 89.16m/s
Attached is the solution
Explanation:
Guidewords for the word “serpent” may be
a.
Serbia and service
c.
Seltzer and Saturday
b.
Seattle and section
d.
Solitude and second
THE CORRECT ONE IS A!!!!!!!!
Answers
Answer:
A. Serbia and service
Explanation:
A guide word is a word written on top of a page to indicate the first or last word entry on that page. For example in a dictionary, they indicate the alphabetical first and last words on the page.
In this example; the word ' serpent ' note the first three letters to guide you in the words that are on that page;
In this case : Serbia and Service.
Read each of the phrases below. Put the phrases in the correct order to show the path of blood flow in the circulatory system starting with the blood traveling from the lungs.
____ blood picks up waste products such as carbon dioxide
____ carries oxygen and nutrients to the body cells
____ moves to right ventricle and to lungs
____ blood travels from the lungs to the left atrium
____ returns to right atrium
Answers
Answer:
blood picks up waste products such as carbon dioxide
returns to right atrium
moves to right ventricle and to lungs
blood travels from the lungs to the left atrium
carries oxygen and nutrients to the body cells
Explanation:
In the circulatory system, the blood carries the carbon dioxide to the right atrium of the heart through superior vena cava, then it move to right ventricle through tricuspid valve. The blood move to lungs following pulmonary artery and from lungs blood travels to the left atrium. From left atrium blood moves to the rest of the body through aorta and carries oxygen and nutrients to the whole body cells through.
Hence, the correct order is as follows:
blood picks up waste products such as carbon dioxide
returns to right atrium
moves to right ventricle and to lungs
blood travels from the lungs to the left atrium
carries oxygen and nutrients to the body cells
A 30 kg dog runs at a speed of 15
What is the dog's kinetic energy?
Answers
15x 15 = 225
225 x 30 = 6750
6750/2 = 3375 J
Ke = 3375 J
a physical quantity is defined as mass per uint volume .what is its si unit.
Answers
A physical quantity is a property of a material or system that can be quantified by measurement. A physical quantity can be expressed as the combination of a numerical value and a unit. For example, the physical quantity mass can be quantified as n kg, where n is the numerical value and kg is the unit. A physical quantity possesses at least two characteristics in common, one is numerical magnitude and other is the unit in which it is measured.
9. a. Determine the mass of a football which has a weight of 0.80 N on a planet where the gravitational field strength is 2 N/kg. (3 marks)
Answers
Answer:
m = 0.4 [kg]
Explanation:
Weight is considered as a force and this is equal to the product of mass by gravitational acceleration.
[tex]W=m*g\\[/tex]
where:
W = weight = 0.8 [N]
m = mass [kg]
g = gravity acceleration 2[N/kg]
Therefore:
[tex]m=W/g\\m = .8/2\\m = 0.4 [kg][/tex]
Please help i don't get it.
Which image matches the Topographic Map Shown?
Also, please explain how your answer is the correct answer. Why is your answer correct?
Answers
Answer:
the answer is 4
Explanation:
the picture matches eachother that's why I picked 4
Answer:
devils tower
Explanation:
on the topographic map the circular lines stop at at certain point because the moutain doesnt get any pointyer if you know what that means
in other words if the map continued with the circular lines all the way to the centerit would have been that snowny mountain
Select ALL of the places you might find DNA evidence.
saliva on gum
blood spatter on the wall
inside a femur bone found in the woods
cells on root of hair found at the scene
Answers
Answer:
Inside a femur bone found in the woods,
saliva of gum
Does someone have hamster name recommendation (girl hamster)
Answers
Explanation:
Lola
Or Jasmine
Or lucy
Or Nightingale
Or Sugarcane
Or Polly
Or Heather
Some names I like!
A wave has frequency of 50 Hz and a wavelength of 10 m. What is the speed of the wave? Group of answer choices
Answers
Explanation:
hehshehebdbajahwwdszsjshshs shsbw
what is projectile motion
Answers
If an object is given an initial velocity in any direction and then allowed to travel freely under gravity, it is called a projectile motion.
It is basically 3 types.
horizontally projectile motion oblique projectile motion included plane projectile motionFind the work done by a man who is pulling a box of 45kg of mass by means of rope which makes angle of 45 degrees.
Answers
Answer:
0
Explanation:
Since no distance is given, the force is not doing any work
No work is done by the man since we do not know the distance or displacement.
Work is only said to be done when the force applied on an object moves it through a particular distance.
Work done = Force x distance.
Since no distance is given in this problem, we can as well assume that the force applied is doing no work on the object.
An artificial satellite orbits Earth at a speed of 7800 m/s and a height of 200 km above Earth’s surface. The satellite experiences an acceleration due to gravity of
A39 m/s2
Bless than 39 m/s2 but greater than 9.8 m/s2
C9.8 m/s2
Dless than 9.8 m/s2 but greater than zero
Answers
Answer: less than 9.8 m/s^2 but greater then zero
Explanation:
Gravitation law
The gravitational acceleration experienced by the satellite is 9.26m/s².
Therefore, Option D) less than 9.8 m/s2 but greater than zero is the correct answer.
Given the data in the question;
Speed or Velocity of the artificial satellite; [tex]v = 7800m/s[/tex]Height of satellite above the Earth; [tex]h = 200km = 200000m[/tex]
To keep the satellite in orbit, a centripetal force is required, this is provided by the gravitational force.
Hence, [tex]F_{centripetal } = F_{gravity}[/tex]
That is; [tex]\frac{mv^2}{r} = mg[/tex]
divide both sides by "m"
[tex]\frac{v^2}{r} = g[/tex]
Here, v is the velocity, g is the gravitational acceleration experienced by the satellite, r is the distance of the satellite from the center of the EARTH.
Diameter of the Earth; [tex]D_{Earth} = 12742 km = 12742000m[/tex]
Radius of the Earth; [tex]R_{Earth} = \frac{12742000m}{2} = 6371000m[/tex]
So,
Distance of the satellite from the center of the EARTH; [tex]r = R_{Earth} + h = 6371000m + 200000m = 6571000m[/tex]
Now we substitute our values into the equation
[tex]\frac{v^2}{r} = g[/tex]
[tex]g = \frac{(7800m/s)^2}{6571000m} \\\\g = \frac{60840000m^2/s^2}{6571000m}\\\\g = 9.26m/s^2[/tex]
The gravitational acceleration experienced by the satellite is 9.26m/s².
Therefore, Option D) less than 9.8 m/s2 but greater than zero is the correct answer.
Learn more; https://brainly.com/question/7282772
what are 3 physical changes of plastic
Answers
Answer:
1. Size
2. Shape
3. Color
Explanation:
Sorry if this is no help
1. A person riding a bicycle on level ground reaches a velocity of 13.4 m/s before
stopping. While braking, the internal energy of the brakes, wheels, and road
increase by 5836 J. What is the mass of the cyclist?
Answers
Kinectic energy = 0.5 * m * v^2
5836 = 0.5 * m * (13.4)^2
89.78m = 5836
Mass = 65 kgs
An equilateral triangle is a triangle with all three sides of equal length. All of the angles in an equilateral triangle are equal.
What is the measure of angle θ in the triangle shown?(Figure 1) Recall that the sum of the angles in a triangle equals 180∘.
Answers
Answer:
60
Explanation:
it's equilateral...all angles are equal...180÷3=60ffs
Each angle of triangle is 60 degree.
What is equilateral triangle ?
If a Triangle having all the three sides of equal length and corresponding angle also to be equal than this triangle is known as equilateral triangle.
By definition of equilateral triangle it is known that all the sides of a triangle are equal and by the angle sum property tells us that a triangle's angles add up to 180. It also tells us that every side of a triangle is the same, and every angle of an equilateral triangle is the same.
Let each angle of triangle be x :
[tex]\begin{aligned} x+x+x&= 180^{o}\\3x&=180^{0}\\x&=60^{o}\end{aligned}[/tex]
Therefore, each angle of triangle is 60 degree.
check and know more about triangle here :
https://brainly.com/question/2773823
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When the temperature of a substance is lowered, its particles
a. move more quickly
b. stop moving completely
c. escape the attractive forces of the other particles
d. move more slowly
Answers
Option d...
Move more slowly........
When the temperature of a substance is lowered its particles move more slowly. Option d is correct. Temperature directs to the hotness or coldness of a body.
What is temperature?Temperature directs to the hotness or coldness of a body. In clear terms, it is the method of finding the kinetic energy of particles within an entity. Faster the motion of particles more the temperature.
Temperature is essential in all areas of Science right from Physics to Geology and also it is important in most parts of our everyday life.
As the temperature of a substance is lowered its particles move more slowly.
Hence Option d is correct.
To learn more about the temperature refer to the link;
https://brainly.com/question/7510619
Derive Isothermal process through ideal gas.( derive it numerically)
Answers
Explanation:
Hope it helps..........
A tomado was moving at a velocity of 10 miles/hour north five minutes later the tomado is moving at a rate of 25 miles/hour north. What was the tornado's acclaration?
Answers
Answer:
180.7km/hr²
Explanation:
Given parameters:
Initial velocity = 10miles/hr
Final velocity = 25miles/hr
Time taken = 5minutes
To hr
60min = 1hr
5min gives 0.083hr
Unknown:
Acceleration = ?
Solution:
To solve this problem,
Acceleration = [tex]\frac{v - u}{t}[/tex]
v is the final velocity
u is the initial velocity
Acceleration = [tex]\frac{25 - 10}{0.083}[/tex] = 180.7km/hr²
which of the following is an example of thermal energy being transferred directly from one substance to another via conduction?
Answers
Answer:I think it’s D
Explanation:
Conduction needs direct touch to transfer
Please help me this is worth allot
Answers
Which image illustrates the bouncing of a light wave off of a surface?
A
B
с
D
A. A
B. B
C. C
Answers
Answer:
The answer is A good luck :P
Answer:
A
Explanation:
The light Bounces off because it is reflecting off glass or anything else
(b)Suggest with reasons,what must be added to the flask to keep the liquid hot.
____________________________________________________
Answers
(a) a thin layer of vacuum is provided between the two walls of flask, to minimise the heat loss by conduction , because for conduction medium (molecules) is required , but now medium is absent .
.(b) the two walls are silvered to minimise the heat loss by radiation , because a shiny surface is a bad absorber and bad emitter of radiation i.e. good reflector of heat , so prevents the heat exchange between content of flask and surrounding .
(c) the lid of flask is provided with a tight cork stopper to minimise the heat loss by convection , so that convection currents cannot go out .
(d) a plastic (or metal) case is provided with a flask , to protect the flask from physical damage
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Where did all the golden carals go?
Answers
Answer:
Thanos went *snap*
Explanation:
The Periodic Table Question 3 of 10 Based on the trend in valence electrons across periods for main-group elements, how many valence electrons does fluorine (F) have? O A. 4 B. 7 O C. 6 D. 5 SUBT
Answers
Answer:
B. 7
Explanation:
Fluorine has 7 valence electrons in its orbitals.
The valence electrons are electrons in the outermost shell of an atom. Every element has a certain amount of valence electrons.
Fluorine belongs to the 7 - group on the periodic table. Every element in this group has 7 electrons in their outermost shell. The elements in the group are called halogens. Other elements in this group are fluorine, chlorine, bromine, iodine and astatine.Answer:
7
Explanation:
What does ionic bond mean
Answers
Answer:
The acception and donation of elections within two elements is called as ionic bond.MARK ME AS A BRAINLIST AND FOLLOW ME :)Please help for 30 points
write at least 3 rules that summarize how magnets move objects.
Answers
Answer:
Magnets work by using Earth's magnetic pull.
Explanation:
Magnets move objects because they are made of steel or metal. And for that reason, they can stick to objects that are metal.
Every rock that you find must be or have at one time been a/an
Answers
Answer:
crystal
Explanation:
well most rocks are like that
1) Which of the following is not a type of energy?
A: Thermal
B: Potential
C: Kinetic
D: Frictional
Answers
The other three are energies while frictional energy is not
