If four negative charges of a magnitude of -6 nc each form a square, 12 cm on a side, the magnitude of electric field at the center of the square will be zero.
E = F / q
E = Electric field intensity
F = Force
q = Charge
They will all exert equal and opposite forces at the center of the square. So the diagonal forces will be equal in magnitude and opposite direction.
Let the four forces be Fa, Fb, Fc and Fd.
E = [ Fa + ( - Fb ) + Fc + ( - Fd ) ] / q
I Fa I = I Fb I = I Fc I = I Fd I
E = 0
Therefore, the magnitude of electric field at the center of the square will be zero.
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Do the number of each period repreent the number of energy level that have electron in them for each element?
A period is a horizontal row of the periodic table and each period number indicates the orbital number of the element in that row.
A period in the periodic table is a series of chemical elements. All elements in a row have the same number of electron shells. Each next element in the period has one more proton and less metallicity than the previous element. Rows of periods of the periodic table. Elements in the same row are in the same period. Periods are numbered from top to bottom.
The periodic number is the same as the number of occupied electron shells. The number n of periods in the periodic table is the same as the number of highest principal energy levels of atoms in that row. This is the main energy level occupied by its valence electrons. The period number is the same as the number of electron energy levels of the atom in the period.
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a weight lifter lifts a 350-n set of weights from ground level to a position over his head, a vertical distance of 2.00 m. how much work does the weight lifter do, assuming he moves the weights at constant speed?
The work done by weight lifter is 700 J.
W = F s
Here, W = work done,
F = force, given = 350 N
s = displacement, given = 2 m
Put these values in formula, W = Fs
W = 350 × 2
W = 700 J
Therefore, the work done by weight lifter is 700 J.
Work done includes both forces exerted on the body and the total displacement of the body. This block is preceded by a constant force F. The purpose of this force is to move the body a certain distance s in a straight path in the direction of the force.
The unit of work done is joule represented by J.
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two coils are placed close together in a physics lab to demonstrate faraday's law of induction. a current of 2.00 a in one is switched off in 1.50 ms, inducing a 7.00 v emf in the other. what is their mutual inductance (in mh)?
The index of refraction of the substance M = 0.45 mH. The refractive index n is the ratio of the speed of light c in a vacuum to the speed of light c' in a medium.
For the system described in the statement, the induced emf in both coils is given by. In other words, the induced emf in one coil is produced by the change in current in the other coil. It can be assumed that a current of 8.0 A belongs to the second coil and an induced emf of 3.00 V develops in the first coil. The current in the second coil turns off at 1.20 ms. Using the previous information, we know: Coil is 0.45mH.
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What are some ways we can observe gravity in action in the natural world?
Answer:
well the force that holds down the sun and the force that when you throw a ball it cases it to come back to you or boomerang or poring a drink or tides or rolling objects
Explanation:
well all of those show the gravity pull sorry if it wasn't helpful
a proton and an electron are released from rest at the midpoint between the plates of a charged parallel plate capacitor. except for these particles, nothing else is between the plates. ignore the attraction between the proton and the electron, and decide which particle strikes a capacitor plate first. why?
There are no other particles between the plates besides these ones. Choose which particle impacts a capacitor plate first, disregarding the electron's attraction to the proton. At the plate first is the electron.
An electron is a negatively charged subatomic particle that can exist either free or bound to an atom. An atom has three main types of particles: protons, neutrons, and the electron that is attached to them.
An electron's negative charge is balanced out by the positive charge of a proton. When an atom has an equal number of protons and electrons, it is considered to be neutral. The electron differs from the other particles in a number of ways. They are much less massive, exist outside of the nucleus, and exhibit both wave- and particle-like characteristics. Since an electron is a fundamental particle
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Energy can be changed from one form to another. Which terms can be used to describe these changes? check all that apply. Energy conversionenergy conservationenergy correlationenergy transformationenergy transference.
The term that can be used to describe the change of energy from one form to another is called energy conversion, energy transformation.
In the field of science, energy conversion or energy transformation are the phrases that are used to express that energy can be converted from one form to another in a system.
It is due to energy conversion or energy transformation that various processes of life can occur. For example, the energy stored in food can be changed into various forms such as heat energy in order to do work.
All the processes that occur in living systems are dependent on energy conversion and energy transformation.
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a 0.5 kg meter stick on earth is supported at the 30 centimeter mark. to balance the meter stick around this point, you would need to add a 2 kg mass at what position on the meter stick?
The position on the meter stick is 25 cm.
Solution:
The center of mass of the meter stick will be at 0.5 m and its torque about the pivot point will be T1 = mg(0.5 - 0.3)
T1 = 0.5*9.81*0.2 = 0.981 N-m (clockwise)
So we have to add 2 kg mass on the left side of the pivot so that it has a counter-clockwise torque about the pivot point.
Let us position it at x the its torque about pivot point will be T2 = mg(0.3 - x) = 2*9.81*(0.3 - x)
To support the stick T1 = T2
0.981 = 2*9.81*(0.3 - x)
0.3 - x = 0.05
x = 0.25 m = 25 cm.
The position of the center of gravity is the average position of the total weight of the object. The center of mass is the object's balance point, also represented as the point where all its mass appears to reside. Sticks are measured in two ways. Measure straight from the top of the shaft to the blade or from the top of the shaft to the heel with the shaft up against a wall. Remember If you measure your street shoe stick it will feel about 3-4 inches shorter on the ice.
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How are wavelength and amplitude alike? Please in a simple sentence.
Answer:
The amplitude of a wave is the height of a wave as measured from the highest point on the wave (peak or crest) to the lowest point on the wave (trough). Wavelength refers to the length of a wave from one peak to the next.
Explanation:
wavelength of red light is 700 nanometers, and its frequency is 4.285 x 1014 hz. what is the speed of red light in m/s. (note: 1 nanometer is
Answer:
Speed = 3·10⁸ m/s
Explanation:
Given:
λ = 700 nm = 700·10⁻⁹ m
ν = 4.285·10¹⁴ Hz
_______________
V - ?
The speed of red light:
V = λ·ν
V = 700·10⁻⁹·4.285·10¹⁴ ≈ 3·10⁸ m/s
At the start of a Formula 1 race Lewis Hamilton, starting from pole position, accelerates uniformly until he reaches the first corner. His speed at the corner is 20 ms-1 and it takes him 4 s to reach this point.
(a) Calculate the acceleration of the formula 1 car. (3)
(b)Sketch (with a ruler!) a speed - time graph for the motion of Lewis Hamilton’s race car from the start of the race until it reaches the first corner.
Numerical values must be added to both axis.
The acceleration of the object is obtained as 5 [tex]m/s^{2}[/tex]
What is the acceleration?The term acceleration has to do with the rate of change of the speed of an object with time. We know that the speed is the distance that is covered per unit time by the object.
In this case, we have the following information about the motion of the object;
Initial speed of the object = 0 m/s
Final speed of the object = 20 ms-1
Time taken for the change = 4 s
We gave to use the equation;
V = u + at
v = final velocity
u = initial velocity
a = acceleration
t = time
Then we substitute the values to get;
20 = 0 + 4t
Then we make the t the subject of this formula
t = 20/4
t = 5 [tex]m/s^{2}[/tex]
The acceleration of the object can be obtained from the calculation as 5 [tex]m/s^{2}[/tex]
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an electron is trapped in an infinite well of width 1.31 nm. what are the three longest wavelengths permitted for the electron's de broglie waves?
If an electron is trapped in an infinite well of width 1.31 nm. The three longest wavelengths permitted for the electron's de broglie waves will be 14.39 * [tex]10^{2}[/tex] m , 5.40 * [tex]10^{2}[/tex] m and 2.88 * [tex]10^{2}[/tex] m
1st longest wavelength will be
lambda = 8 * m * [tex]L^{2}[/tex] * c / h ( [tex]n_f^{2}[/tex] - [tex]n_i^{2}[/tex])
m = mass of electron
L = width of infinite well
h = plank's constant
c = speed of light
lambda 1 = 8 * m * [tex]L^{2}[/tex] * c / h ( [tex]n_f^{2}[/tex] - [tex]n_i^{2}[/tex])
= 8 * 9.1 * [tex]10^{-31}[/tex] * 1.3 * [tex]10^{-9}[/tex] * 3 * [tex]10^{8}[/tex] / 6.626 * [tex]10^{-34}[/tex] ( [tex]2 ^{2} - 1^{2}[/tex] )
= 14.39 * [tex]10^{2}[/tex] m
lambda 2 = 8 * 9.1 * [tex]10^{-31}[/tex] * 1.3 * [tex]10^{-9}[/tex] * 3 * [tex]10^{8}[/tex] / 6.626 * [tex]10^{-34}[/tex] ( [tex]3^{2} - 1^{2}[/tex] )
= 5.40 * [tex]10^{2}[/tex] m
lambda 3 = 8 * 9.1 * [tex]10^{-31}[/tex] * 1.3 * [tex]10^{-9}[/tex] * 3 * [tex]10^{8}[/tex] / 6.626 * [tex]10^{-34}[/tex] ( [tex]4^{2} - 1^{2}[/tex] )
= 2.88 * [tex]10^{2}[/tex] m
The three longest wavelengths permitted for the electron's de Broglie waves will be 14.39 * [tex]10^{2}[/tex] m , 5.40 * [tex]10^{2}[/tex] m and 2.88 * [tex]10^{2}[/tex] m
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A net force of 265 n accelerates a bike and rider at 2. 30 m/s2. What is the mass of the bike and rider together?.
A net force of 265 n accelerates a bike and rider at 2. 30 m/s2. The mass of the bike and rider together will be 115.22 Kg
Force = mass * acceleration
mass = Force / acceleration
= 265 / 2.30
= 115.22 Kg
The mass of the bike and rider together will be 115.22 Kg
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why is the sum of the maximum voltages across each element in a series rlc circuit usually greater than the maximum applied voltage?
What is Inductor?
Similar to conductors and resistors, inductors are basic parts that serve specialized purposes in electrical devices. Inductors are typically coil-like objects encountered in electrical circuits. An insulated wire is coiled around the center core to form the coil.By briefly holding energy in an electromagnetic field and then releasing it back into the circuit, inductors are mostly used to reduce or regulate electric spikes.The majority of power electronic circuits include inductors, which are passive parts that store energy in the form of magnetic energy when electricity is supplied to them.However, A significant characteristic of an inductor is that it resists changes in the amount of current that passes through it.
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Now, assume the elevator is at rest. rank the magnitude of the forces.
a. Fi on 3
b. F1 on floor
c. F3 on 2
d. Ffloor on 1
e. F1 on 2
f. F2 on 1
g. F2 on 3
1. largest
2. smallest
The elevator is at rest. rank the of magnitude the forces F1 on floor and F floor on 1 is largest, F1 on 3 is smallest.
What is elevator?Elevator is defined as a vehicle that transports people or cargo vertically using a cable, hydraulic cylinders, or roller tracks. A platform that can be either open or closed, an elevator is used to raise and lower both people and objects to higher and lower floors.
Based on the law of motion If the elevator is accelerating, the weight of the person is larger than real gravity. So a person's weight will increase whether they are going up or down.
Thus, the elevator is at rest. rank the of magnitude the forces F1 on floor and F floor on 1 is largest, F1 on 3 is smallest.
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if the average book has a mass of 1.30 kg with a height of 18.0 cm , and an average shelf holds 25 books (standing vertically), how much work is required to fill all the shelves, assuming the books are all laying flat on the floor to start?
The work required to fill all the shelves is 1.96 × 10³ J
Work is the strength transferred to or from an object via the utility of pressure along a displacement. In its only form, for a steady force aligned with the direction of movement, it equals the made from the force strength and the space traveled.
Calculation:-
given,
mass of each book = 1.30 kg
height = 18 cm = 0.18 m
number of books = 25
potential energy = mgh
work required to fill is Wx = N.mg [ D + 1/2 h + (n-1)H]
= 1.96 × 10³ J
The definition of work in physics is famous for its dating to power – whenever work is executed, power is transferred. paintings are manufactured from the element of the force inside the path of the displacement and the significance of this displacement.
Work is defined as shifting strength into an item so that there may be some displacement. energy is described as the ability to do work. paintings carried out are usually identical. energy can be of various sorts which include kinetic and ability electricity.
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the triceps muscle in the back of the upper arm extends the forearm. this muscle in a professional boxer exerts a force of 1975 n with an effective perpendicular lever arm of 2.50 cm , producing an angular acceleration of the forearm of 115.0 rad / s2 . what is the moment of inertia of the boxer's forearm?
The moment inertia of the boxer's forearm is 0.43 kgm².
We need to know about torque to solve this problem. Torque is the rotational equivalent of linear force. It can be determined as
τ = F x r
where τ is torque, F is perpendicular force and r is radius.
Torque also depends on the moment inertia
τ = I . α
where I is inertia and α is angular acceleration.
From the question above, the given parameters are
F = 1975 N
r = 2.5 cm = 0.025 m
α = 115 rad/s²
Substitute the first equation with the second equation and we can calculate the inertia of the boxer's forearm
τ = τ
F x r = I . α
1975 . 0.025 = I . 115
I = 0.43 kgm²
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A myopic person sees that her contact lens prescription is –4. 00 d. What is her far point?.
This person has a contact lens prescription with a power of negative 4.00 diopters and their far point with the contact lenses will be infinity because that's the goal of the lenses is to create normal vision, which has a far point of infinity.
During normal vision, the retina receives a sharply focused image. Myopia, a nearsighted condition, causes distant objects to look hazy because the centre of focus is in front of the retina. Myopia, a disease that affects many people, causes near objects to appear clear while far distant objects to appear blurry.
When you criticise someone for being myopic, it's because you find them to be incapable of seeing that their actions could have unfavourable effects. [disapproval] The government still views spending with myopia. More Synonyms for myopia include narrow-minded, short-sighted, and unimaginative.
If the cornea, which is the transparent front surface of the eye, is overly curved or the eyeball is too long, myopia will result. As a result, distant objects appear blurry when light enters the eye.
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What is the number of paths through which electricity can flow in a series circuit?.
In a series circuit, there is only one path for the electricity to flow. This is because the circuit is made up of only one loop, and the electricity has to flow through all of the components in that loop.
The circuit is created by connecting the positive terminal of one component to the negative terminal of the next component, creating a loop. If any of the components in the circuit are not working, then the circuit is broken and the electricity will not flow. Circuit is created by connecting devices in a line, one after the other. This means that the current has to flow through each device in turn before it can reach the end of the circuit.
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if 800 j of heat is added to a gas that does 250 j of work as a result, what is the change in the internal energy of the system?
If 800 j of heat is added to a gas that does 250 j of work as a result, The change in the internal energy of the system will be 550 J
d Q = d U + d W
Given
Q = heat added = 800 J
Work = 250 J
change in internal energy = d U = ?
d U = d Q − d W
= 800 - 250 = 550 J
The change in the internal energy of the system will be 550 J
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A pencil is 13. 5 centimeters long. If 1 centimeter = 0. 39 inch, what is the length of the pencil in feet, to the nearest hundredth?.
The length of the pencil in feet, to the nearest hundredth, is 0.443 feet.
A centimeter or centimeter is a unit of length within the worldwide gadget of devices, equal to one centesimal of a meter, centi being the SI prefix for an aspect of 1/100. The centimeter turned into the bottom unit of length within the now deprecated centimeter–gram–2nd gadget of units.
An inch is a unit of duration in the British imperial and the united states standard structures of size. it's far the same as one/36 yards or 1/12 of a foot. The foot, general symbol: ft, is a unit of the period within the British imperial and u.s. customary systems of dimension.
Calculation:-
1 cemtimeter = 0.393701 inch
13.5 centimeter = 5.32 inch
12 inch = 1 feet
5.32 inch = 1/12 × 5.32 feet
= 0.443 feet
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You have been studying heat transfer in science class. Your task today is to make a solar oven to make s'mores: graham crackers, marshmallows, and melted chocolate. When you have successfully completed your oven, you get to eat the s'mores with the melted chocolate and soft marshmallows. How is heat energy transferred to achieve this task?
A - radiation
B - convection
C - insulation
D - conduction
The heat energy transferred to achieve this task is conduction heat transfer.
option D is the correct answer.
What is heat transfer?Heat transfer is defined as the process in which the molecules are moved from the region of higher temperature to lower temperature.
There are three methods of heat transfer process and they include the following;
conduction heat transferconvection heat transferradiation heat transferHeat transfer by conduction is the process of heat transfer from one particle of the medium to another with the particles being in direct contact with each other.
Heat transfer by convection occurs in fluid and involves the actual movement of the liquid molecules.
Heat transfer by radiation is a method of heat transfer that does not require material medium.
Thus, the heat transfer that allowed the oven to heat melt the chocolate is conduction heat transfer while the source of energy of the solar oven is radiation from sun.
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Answer:D is the answer
Explanation:
How would you describe the inner mitochondrial membrane?.
The internal mitochondrial membrane (IMM) features as a chemical and electrical insulator. It creates compartments by dividing the matrix from the cytosolic surroundings due to the fact it's miles substantially less permeable to small molecules and ions than the outer membrane.
The internal mitochondrial membrane is both an electrical insulator and a chemical barrier. sophisticated ion transporters exist to permit specific molecules to pass this barrier. There are several antiport systems embedded within the inner membrane, allowing the change of anions between the cytosol and the mitochondrial matrix.
The inner membrane is likewise loaded with proteins worried in electron delivery and ATP synthesis. This membrane surrounds the mitochondrial matrix, in which the citric acid cycle produces the electrons that tour from one protein complex to the next within the internal membrane.
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a. how long must a 0.60-mm-diameter aluminum wire be to have a 0.50 a current when connected to the terminals of a 1.5 v flashlight battery?
To learn the resistance, flashlight and terminal points.
What is flashlight?
A light bulb on a wire makes up a type of circuit that is a flashlight. Simply put, a light bulb converts the energy of moving (-) charges into light. The circuit is created by connecting the wire with the light bulb to the battery by depressing the flashlight's switch.
What is terminal?
A terminal is the place where a conductor from a part, device, or network ends. As the reusable interface to a conductor and a point where external circuits can be connected, an electrical connector at this endpoint is another type of terminal.
a)R = v/i = 1.5/0.5 = 3 ohm
R = rho*L/A
L = R*A/rho = 3*3.14*(0.0003)^2/2.8*10^-8 = 30.2 m
b)
R = 3/2 = 1.5 ohm
i = V/R = 1.5/1.5 = 1 A
so
resistance=1.5/0.54
=2.778 ohm.so,
2.778=(2.8*10^-8*l)/(0.25*3.142*(6*10^-4)^2)
=28.0558 m
b)resistance will become half=1.389 ohm
so current=1.5/1.389
=1.08 A
You need to get the resistance of the wire.
Then do V = I * R
In your book you should have a table that says how to calculate the resistance of a wire for that diameter, material, and length.
Then just plug in the values and solve for I.
1.5 = I * R
Therefore, the connecting terminals is 1.5v.
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In an experiment, an animal was provided multiple strings, one of which would provide food when pulled. The animal pulled the strings until the food was obtained. What does this say about animal problem solving? The animal had no memory of previous attempts. The animal was unable to understand the task. The animal learned from previous experience. The animal had a moment of realization and solved the problem quickly.
From the experiment, we can be able to say that the animal learned from previous experience.
What is learning?When we talk about learning, what we are talking about is the ability of a person to harness the past experiences and then bring it to bear on a current task. This means if an organism is said to be learning, then the organism that is in question would be able to gather the experiences of the past and then use it to make an intelligent decision in the future.
In this case, an animal was provided multiple strings, one of which would provide food when pulled. The animal pulled the strings until the food was obtained. This implies that the organism was able to learn from the variety of experiences that was provided to each by the pulling of the stings in the lever each time.
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Under which conditions of temperature and pressure does carbon dioxide behave most like an ideal gas?.
Answer:
an ideal gas at low temperatures and high pressures.
What is the shape of the trajectory followed by a charged particle as it moves perpendicular to a uniform magnetic field?.
The circular path is the shape of a charged particle's trajectory when it travels perpendicular to the a uniform magnetic field.
What is a magnetic field?
The magnetic influence on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field. A force perpendicular to the charge's own velocity and the magnetic field acts on it when the charge is moving through a magnetic field.
In a magnetic field, a charged particle travels along a curved path because the magnetic force is perpendicular to the direction of motion. The particle keeps moving along this curved path until it completes a full circle.
Hence, the shape of the trajectory is circular followed by a charged particle as it moves perpendicular to a uniform magnetic field.
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Which term is defined as "energy that moves from high to low along many pathways"?.
Energy that flows from high pathway to low pathway , is Spontaneous energy.
Energy comprises an involvement of Hess's law that describes the path of the work traced whether it be cyclic or non cyclic.[tex]\alpha +\beta -------- > g +\pi \\\\ \lim_{n \to \infty} \alpha _n decreases \\\\ \lim_{n \to \infty} \pi _n +g* increases[/tex]
In thermodynamics flow of energy decides the nature of reaction and work done.
Gibbs free energy is negative for spontaneous workGibbs free energy is positive for non spontaneous work.
[tex]H=T-US[/tex] , this is Helmholtz Free Energy. T is total energy and U is internal energy and S is entropy.
Internal energy refers to energy due to degrees of freedom.
[tex]dU=\frac{KT}{2} \\\\\int\limits^a_b {dU} \, dx=\frac{KTx}{2} \\ \\ a=low\\b=high[/tex]
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if the raindrop comes to rest in 0.37 ms , what is the magnitude of the average force of the impact?
a) The magnitude of the impulse delivered to your roof is 1.13 × 10^-4 Kg m / s
b) The magnitude of the average force of the impact is 0.37 N.
a) Impulse is defined as the change in moment of object . The total impulse on an object is measured from the product mass of the object and the total change in velocity of the object. Impulse is a vector quentity so it has both magnitude as well as direction (negative or positive sign). Units of impluse in S.I system , Newton seconds, or N∗s.
Mathematically , J =m× v
v --> change in velocity which is equal to final velocity of object and substracting staring velocity.
m---> mass of object
We have, mass of raindrop (m) = 0.014 g = 0.014×10⁻³kg
the speed of raindrop (v) = 8.1 m/s
putting all values in above formula we get,
J = mv = 0.014×10⁻³ × 8.1 = 0.013 × 10⁻³ kg m/s
thus, value of impluse is 0.013×10⁻³3 kg m/s
b) Average force of impact is defind as the product of mass of object by the average velocity of object over a definite time.
According to Newton's Second law of motion,
force (F) = m× a
where m---> mass of object
a----> acceleration which is equal to change in velocity with respect to time.
Now, we have given m = 0.014 ×10⁻³3 kg
time = 0.37 ms
acceleration (a) = v/t = ( 8.1 m/s )/ 0.37 ms
putting all values in above formula we get,
force = (0.014×10⁻³kg × 8.1 m/s )/0.37 ×10⁻³ s
= 0.306N ~ 0.31N
Thus, magnitude of average force of impact is 0.31 N .
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#Complete question:
A large raindrop - the type that lands with a definite splat - has a mass of 0.014 g and hits your roof at a speed of 8.1 m/s.
Part A) What is the magnitude of the impulse delivered to your roof? Express your answer with the appropriate units.
Part B) If the raindrop comes to rest in 0.37 ms, what is the magnitude of the average force of the impact? Express your answer with the appropriate units.
an object's displacement is 1.02 ft directed at 33.7° ES.
The magnitude of the horizontal component is
and the magnitude of the vertical component is
with solution if you want please
Answer:
The horizontal component is 0.77ft
The vertical component is 0.67ft
Explanation:
I have attached a quick pdf of the work required for this problem. In order to solve this problem first draw a picture.
The direction of the displacement is 33.7 degrees east of south which means that the horizontal component, x, is the displacement times the sin(33.7). Which makes the equation 1.02*sin(33.7)=x. Similarly for the vertical component, except with cosine instead of sine.
referring to your oscilloscope, which controls affect the following? a) the height of the displayed waveform b) the number of cycles displayed c) the starting point of the waveform d) the position of the waveform e) engaging the sweep generator
Referring to the oscilloscope, the height of the displayed waveform controls the effect.
Thus, the correct option is A.
What is the oscilloscope?Аn oscilloscope is а lаborаtory instrument commonly used to displаy аnd аnаlyze the wаveform of electronic signаls. In effect, the device drаws а grаph of the instаntаneous signаl voltаge аs а function of time.
The most common oscilloscope controls аre for аmplitude, frequency, triggering, аnd chаnnels. Once your teаcher hаs helped us аcquire а signаl using the correct chаnnel аnd triggering we will use the аmplitude аnd frequency controls to displаy the chаrаcteristics of the sound being produced. The аmplitude аdjustment of аn oscilloscope controls how tаll а given voltаge will аppeаr on the screen. The purpose of this аdjustment is thаt you cаn see а very lаrge or а very smаll signаl on the sаme screen.
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