Electrical forces can be divided into two categories: attractive electrical forces and repellent electrical forces. Similar charges repel one another whereas opposite charges attract one another.
What is meant by electric force?The electric force attracts the nucleus and electrons to one another. The emptiness that a positive or negative charge leaves behind is known as an electric field because a field is produced there.
Electrical forces can be categorized into two groups: those that attract and those that repel. While opposite charges attract one another, similar charges repel one another.
Electrical forces are produced when two charges come into contact with one another. The electric force exerted on a single charge when there are three or more charges present is just the culmination of the results of each charge's interactions with the other charges.
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What do you think will be the pressure result of the current experimental conditions?
Pressure above the left beaker the pressure outcome of the current experimental circumstances.
What do u mean by pressure?Either the action of pressing or the state of pressing. A strain or force exerted against resistance in any direction. Force per unit of area is a measure of force exerted uniformly over a surface.
Pressure is the ratio of the force applied perpendicularly to an object's surface to its area. Its abbreviation is "p" or "P."
The force applied by one region of a gas, liquid, or solid to another, expressed as a function of area. A substance is said to have negative pressure if another substance exerts greater force per unit area on it than it does on it. Pressure is commonly measured in Pascal units, atmospheres, or pounds per square inch. Its value is just the opposite of the pressure the other substance is exerting.
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a stick is dropped off a cliff what is the sticks intial velocity? Show work
What are some of the limitations of this two-dimensional model of electric fields?
Some limitation of this two-dimensional model of electric fields are
Vectors can only be shown from one particle to another, but we don't see that in this model. We cannot see the object in the "z" direction as we could if it were a three-dimensional model.The direction of the field is taken to be the direction of the force it would exert on a positive test charge.The electric field is radially outward from a positive charge and radially inwards in a negative point charge i.e. not restricted to only two directions.Electric field is the electrical property associated with each point in space when charge in any form is present.
Three dimensional model must be used to find electric field of a particle as it is easy to understand and also provides clear visualization.
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The only substance near earth's surface that is found naturally in the current atmosphere as a solid, liquid, and a gas is:_________
Water is the only substance that is naturally present near the surface of the planet in the current atmosphere as a solid, liquid, and a gas.
What is the atmosphere ?The gaseous mixture that covers the planet is its atmosphere. The Earth's atmosphere contributes to the viability of life. In addition to giving us air to breathe, it protects us from the majority of the Sun's harmful ultraviolet (UV) radiation, increases the surface temperature of our planet by around 33° C (59° F) due to the greenhouse effect, and mainly eliminates dramatic temperature variations between day and night. There is an atmosphere on each of the other planets in our solar system, but none of them has the same proportion of gasses or layered structure as Earth's atmosphere.
The most prevalent elements are nitrogen and oxygen, which make up about 78% of dry air (N2) and about 21% of it, respectively (O2). Argon, carbon dioxide (CO2), and numerous other gases are also present in the atmosphere, although at considerably smaller concentrations; each makes up less than 1% of the total gas mixture. Water vapor is also present in the atmosphere. Water vapor is present, but its usual concentration is only about 1%. Additionally, there are a lot of tiny liquids and solids "floating" in the atmosphere. The term "aerosols" refers to a group of particles that also includes dust, pollen, spores, salt from sea spray, volcanic ash, smoke, and other substances.
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A robot used in a pharmacy picks up a medicine bottle at t=0. it accelerates at 0.30 m/s2 for 3.5 s , then travels without acceleration for 74 s and finally decelerates at -0.60 m/s2 for 1.8 s to reach the counter where the pharmacist will take the medicine from the robot.
Compare collinear points and coplanar points- ar ecollinear points also coplanar?
The collinear points are also known as coplanar but coplanar cannot be collinear all the time.
What is collinear points and coplanar points?The difference between Collinear Points and Coplanar Points is that the former a states that if three or more points lies in a straight line and a line on which the points lie, especially if it is related to a geometric figure such as triangle, is also called an axis while the latter are simply the same as the meaning of the Collinear but lies on the same plane.
Collinear points lie on the same line and Coplanar points also lies in the same plane.
For example, we have a image which has 3 points A, B and C on the plane M. Those points and plane lies on the same line. So, that it can be known as collinear and coplanar.
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Due to radiation and absorption, what is the maximum flame temperature in a fire?
The maximum flame temperature in a fire is 1500-1600K due to radiation and absorption.
What do you mean by radiation and absorption?In physics, matter (usually electrons bound in atoms) absorbs electromagnetic radiation in order to convert the energy of a photon into the internal energy of the absorber (for example, thermal energy). Attenuation, or the steady decrease in light wave intensity as it travels through a medium, is a prominent effect. In some circumstances (optics), the medium's transparency changes by a factor that varies as a function of wave intensity, leading to saturable absorption (or nonlinear absorption), even though the absorption of waves typically does not depend on their intensity (linear absorption).
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Measuring human impact and comparing it with the biophysical world's carrying capacity is known as:________-
Measuring human impact and comparing it with the biophysical world's carrying capacity is known as Ecological footprint.
What is Ecological footprint?
The Global Footprint Network promotes the ecological footprint as a way to assess how much nature is needed to sustain a certain number of people or an economy. Through an ecological accounting system, it monitors this demand. The accounts compare the biologically productive areas used by people for consumption to the biologically productive areas available in a region or throughout the world (biocapacity, the productive area that can regenerate what people demand from nature). It measures the effects of humans on the environment, to put it briefly.
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The mass of an apple was 84.0 g.
The volume of the apple was 120 cm³.
Calculate the density of the apple.
Give your answer in g/cm³.
CS
A bicyclist steadily speeds up from rest to 9.00m/s in 3.10s.
How far did she travel during this time?
unit
A test rocket at ground level is fired straight up from rest with a net upward acceleration of 20 m/s2. After 4.0 s, the motor turns off, but the rocket continues to coast upward with insignificant air resistance. What maximum elevation does the rocket reach?
The maximum elevation the rocket will reach is 160 m.
Maximum height attained by the rocketThe maximum height reached by the rocket is calculated as follows;
h = vt + ¹/₂at²
where;
v is the initial velocity of the rocket = 0t is the time of motiona is the acceleration of the rocketsubstitute the given parameters and solve for maximum height.
h = 0 + ¹/₂(20)(4)²
h = 160 m
Thus, the maximum elevation the rocket will reach is 160 m.
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A laser emits light with a frequency of 5.69 x 1014 s-1. the energy of one photon of the radiation from this laser is:_________
A laser emits light with a frequency of 5.69 x 10^14 s-1 then the energy of one photon of the radiation from this laser is 3.7 x 10^(-19).
What is radiation?The energy emission in the form of electromagnetic waves or in the form of moving subatomic particles which are especially high-energy particles which cause ionization is called as the phenomenon of radiation.
Any kind of energy that emanates from a source and moves through space at the speed of light is referred to as radiation. This energy has wave-like qualities and is accompanied by an electric field and a magnetic field.
Here ∨ = 5.69 x 10^(14) s-1
we know E=h∨
where h = 6.626 x 10^(-34) js
putting the value in the formula, we have,
6.626 x 10^(-34) x 5.69 x 10^(-34)
=3.7 x 10^(-19)
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Determine the tension developed in the cable ab required to support the traffic light, which has a mass of 25 kg . take h = 3.5 m.
The tension developed in the cable is 245.25 N.
What is tension Force?In physics, tension is defined as the pulling force transmitted axially by a string, cable, chain, or other similar object, or by either end of a rod, truss member, or other comparable three-dimensional object.
Tension can also be thought of as the action-reaction pair of forces acting at each end of the aforementioned elements. The polar opposite of compression might be tension.
CalculationOnly two forces act on the traffic light: the tension T of the cable (upward) and the weight of the traffic light (downward).
The weight is mg = 25 x 9.81 = 245.25 N
If the traffic light is at equilibrium, the resultant of the two forces must be equal to zero (Newton's second law):
T - mg = 0
Therefore, the tension of the cable is.
T = mg = 245.25 N
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determination of the size of molecule using oil drop experiment
Measurement of molecule size using an oil drop experiment
The volume of a tiny oil drop is determined by finding its radius, or r. Now that the oil drop is on the water's surface, it spreads out into an approximately circular region with a height h and radius R. The patch's diameter is determined, and from there, the radius R is calculated.
Up until the oil forms a monolayer, the oil drop expands, pushing the powder aside to form a clean circle. The thickness of the monolayer, which is the height of the oil drop molecule on the water, can be calculated by measuring the area of the monolayer and dividing the volume of the drop by that area.
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A shopping cart given an initial velocity of 2.0 m/s north undergoes a constant acceleration of 3.0 m/s2 north. what is the distance the cart moved after the first 4.0 s of its motion?
Following the initial 4.0 seconds of travel, the cart moved 32m.
What is an equation of motion?Physicists use equations of motion to describe how a physical system behaves in terms of how its motion changes over time.
The behavior of a physical system is described by the equations of motion in more detail as a collection of mathematical functions expressed in terms of dynamic variables. These variables typically comprise time and spatial coordinates, but they could also have momentum components. The most flexible option is generalized coordinates, which can be any useful variable that is a component of the physical system. In classical mechanics, the functions are defined in a Euclidean space, while curved spaces are used in relativity instead. The equations are the answers to the differential equations describing the motion of the dynamics of the dynamics of a system are known. The amount of motion changes according to the strength of the force and does so in the direction of the force's applied straight line.
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The amount of voltage induced into a conductor moving in a magnetic field depends on the ______.
A measure of how quickly a conductor moves across a field. The voltage induced increased as the conductor moved through the field more quickly. The induced voltage and speed are directly inversely proportional.
When a conductor is moved in a magnetic field, a voltage will be induced on the conductor.?Current can only flow when a circuit is closed or complete, hence, unless the circuit is completed current will not flow
What is Electro-Magnetic Induction?
This a phenomenon whereby a wound wire or a soft core of conductor made to cut across magnetic line of force and an E.M.F is generated, this E.M.F forces current to flow if the circuit is completed.
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If earth experienced an iron shortage, where could astronomers direct cosmic mining equipment to find more?
a.
the cores of the other terrestrial planets
b.
the rings of saturn and uranus
c.
the surface of the martian moons
d.
the atmosphere of jupiter
More iron could be found from the cores of the other terrestrial planets. Option A
What is iron?Iron is one of the elements that could be found on earth. This element is present in abundant amounts in the earth's core and ranks as the fourth most abundant element in the core of the earth.
The earth has a lot more deposit of iron in it. We know that earth lies at the center of the solar system for the sole reason that it is habitable. No other planet in the solar system is habitable though efforts are underway to make the other planets equally habitable.
Iron can also be found in the cores of other terrestrial planets but the amounts may be less than the amount of iron that is found on earth. As such, If earth experienced an iron shortage, astronomers could direct cosmic mining equipment to the cores of the other terrestrial planets find more.
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A copper wire has a diameter of 1.572 mm. what magnitude current flows when the drift velocity is 2.29 mm/s? take the density of copper to be 8.92 103 kg/m3.
By using the drift velocity of the electron, the current flow is 6.02 ampere.
We need to know about drift velocity of electrons to solve this problem. The drift velocity can be determined as
v = I / (n . A . q)
where v is drift velocity, I is current, n is atom number density, A is surface area and q is the charge.
From the question above, we know that
d = 1.572 mm
r = (0.001572 / 2) m
v = 2.29 mm/s = 0.00229 m/s
ρ = 8.92 x 10³ kg/m³
q = e = 1.6 x 10¯¹⁹C
Find the atom density
n = Na x ρ / Mr
where Na is Avogadro's number (6.022 x 10²³), Mr is the atomic weight of copper (63.5 g/mol = 0.635 kg/mol).
n = 6.022 x 10²³ x 8.92 x 10³ / 0.635
n = 8.46 x 10²⁷ /m³
Find the current flows
v = I / (n . A . q)
0.00229 = I / (8.46 x 10²⁷ . πr² . 1.6 x 10¯¹⁹)
0.00229 = I / (8.46 x 10²⁷ . π(0.001572 / 2)² . 1.6 x 10¯¹⁹)
I = 6.02 ampere
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One method of estimating the temperature of the center of the sun is based on the assumption that the center consists of gases that have an average molar mass of 2. 00 g/mol. If the density of the center of the sun is 1. 40 g/cm3 at a pressure of 1. 30 x 109 atm, calculate the temperature.
By using ideal gas approximation, the sun's temperature is 2.27 x 10⁷ K.
We need to know about ideal gas to solve this problem. The ideal gas will follow the rule
P . V = n . R . T
where P is pressure, V is volume, n is the amount of substance, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.
From the question above, we know that:
Mr = 2 g/mol
ρ = 1.4 g/cm³
P = 1.3 x 10⁹ atm = 1.32 x 10¹⁴ Pa
m(sun) = 1989 x 10³⁰ g
Find the amount of sun substance
n = m / Mr
n = 1989 x 10³⁰ / 2
n = 994.5 x 10³⁰ mol
Find the volume of sun
V = m/ρ
V = 1989 x 10³⁰ / 1.4
V = 1420.71 x 10³⁰ cm³
V = 1.42 x 10²⁷ m³
By substituting the parameters, we get
P . V = n . R . T
1.32 x 10¹⁴ . 1.42 x 10²⁷ = 994.5 x 10³⁰ . 8.31 . T
T = 2.27 x 10⁷ K
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A glass tube (open at both ends) of length l is positioned near an audio speaker of frequency f 5 680 hz. for what values of l will the tube resonate with the speaker?
The lowest possible value of the length
L1 = 0.25m
- Second lowest possible value
L2 = 0.45m
- Third lowest possible value
L3 = 0.75
CalculationBefore calculating the length of the resonance tube, we have to first know the wavelength produced by the wave.
Using the expression
v = Foλ
V is the velocity of wave
Fo is the resonance frequency
λ is the wavelength
From the formula,
λ = v/Fo
λ = 343/680
λ = 0.50m
For an open pipe, the first resonant length L1 = λ/2
Second resonant length L2= λ
Third resonant length L3 = 3λ/2
The lowest possible value of the length L1 = 0.50/2
L1 = 0.25m
Second lowest possible value
L2 = 0.50m
Third lowest possible value
L3 = 3(0.50)/2
L3 = 0.75m
Hence, for values of 0.25,0.50 and 0.75, the tube resonates with the speaker.
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Suppose you add two vectors a and b. what angle between them produces the result with the greatest magnitude?
The angle to find the magnitude of the resultant force of two vectors 90 DEG.
What is magnitude?Greatness by and large alludes to the amount or distance. According to the development, we can associate extent with the size and speed of the article while voyaging. The size of the item or the sum is its greatness. Like in the event of speed, a vehicle is voyaging quicker than a motorbike. Size alludes to the evaluating of the splendor of stars, the first being the most brilliant. It has been moved to different issues since basically the seventeenth century. Magnitude for the most part alludes to the amount or distance. Corresponding to the development, we can connect greatness with the size and speed of the item while voyaging. The size of the item or the sum is its greatness. Like in the event of speed, a vehicle is voyaging quicker than a motorbike.
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A ground state hydrogen atom absorbs a photon of light having a wavelength of 92.27 nm. it then gives off a photon having a wavelength of 383.4 nm. what is the final state of the hydrogen atom?
Absorption or emission lines for hydrogen occur when electrons change energy levels. These correspond to specific wavelengths and can be calculated by using:
1/λ = RH (1/n^2f - 1/n^2)
RH = 1.09737×10^7m^−1 is the Rydberg constant
For the 92.97 absorption, initial=1, solve for final
1/92.92×10^-9=R(1/1^2 - 1/final^2)
(1/92.97×10^-9)*(1/1.096775×10^7)=1/1^2 - 1/final^2
final=8
When 384.3 wavelength is released n=8 will be initial level. Solve for final level.
-1/383.4×10^-9=R(1/8^2 - 1/final^2)
(-1/383.4×10^-9)*(1/1.096775×10^7)=1/8^2 - 1/final^2
final = 2
When n = 2 the electron will land at that level.
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In diving to a depth of 374 m, an elephant seal also moves 311 m due east of his starting point. what is the magnitude of the seal's displacement?
The magnitude of the seal's displacement will be 486.41m
What is the concept of displacement?There are an endless number of paths that can be built between two places. The distance is the name given to any specific length of path. There is a path with the shortest distance out of all of these, and the length of that path is determined by the size of a properly specified vector quantity called the displacement.
Given that an elephant seal goes 311 m to the east of his starting location when diving to a depth of 374 m.
Allow the seal to begin at point A and dive deep to reach position B. In the illustration below, his displacement is highlighted in red:
The hypotenuse of the right triangle ABC can be located to determine the displacement's magnitude.
We discover:
displacement of the seal = [tex]\sqrt374^{2} +311^{2} = 486.41m[/tex]
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The force experienced by a unit test charge is a measure of the strength of an electric:
-zone
-field
-sphere
-sector
Answer:
the answer should be field.
Friction is a force caused by the contact of one surface on another.
a. true
b. false
Friction is a force caused by the contact of one surface on another: a. true
The Friction force is the force that opposes the displacement of an object or body on a contact surface. The greater the opposition the contact surface exerts on the displacement of an object, the greater the frictional force.
The general formula for the friction force is:
Fr = μ * N * Uv
Where:
Fr= Frictional forceμ= Friction coefficient. It is a dimensionless value that depends on the nature and treatment of the substances in contact.N= Modulus of the normal force.Uv = Unit vector in the direction and sense of the velocity vector.What is force?It is the physical magnitude that expresses the effort necessary to move the mass of one kilogram with an acceleration of one meter per second squared, this is expressed in units of the international system in Newton.
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An object is pulled northward with a force of 10 n and southward with a force of 15 n. the magnitude of the net force on the object is:________
a. 0 n.
b. 5 n.
c. 10 n.
d. 15 n.
The correct option is (b) 5n
As a result, there is a net downward force of 5N operating on the object.
The resultant force is the force that results from adding the vector sums of all the forces operating on an item. The combined action of all the acting forces on the object produces the same effect as the resulting force. When determining the resulting force, the direction of the forces must be taken into account.
Given;
The northward force is Fn = 10N
The southward force is Fs = 15N
Required;
The net force on the mobile phone is Fnet = ?N
The object's weight exerts downward pressure, and upward resistance exerts upward pressure. The vector sum of these two forces will be the net force.
Fnet = Fs - Fn (Considering the direction downward as positive)
Fnet= 15N - 10N
Fnet = 5N
As a result, there is a net downward force of 5 N operating on the object.
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Materials whose constituent particles are bound by which type of bond are generally expected to have the lowest melting temperatures?
Materials whose constituent particles are bound by Vander waal's type of bond are generally expected to have the lowest melting temperatures
What is Vander waal's interaction ?When two atoms are close enough to each other that their outer electron clouds just barely contact, van der Waals interactions take place. This causes charge oscillations that produce a unidirectional, nonspecific attraction.
Hydrogen bonding, dispersion forces, and dipole-dipole interactions are examples of van der Waals forces.Van der Waals forces come in three different flavours: dispersion (weak), dipole-dipole (medium), and hydrogen (strong). Polar molecules and ions join together to produce ion-dipole bonds, which connect ionic species to covalent molecules. Usually, these chemicals form medium- to strong-bonding structures.Learn more about Van der Waals forces here:
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A space shuttle orbiting earth travels a distance of about 30 miles in 6 seconds. what is the average speed of the space shiuttle in miles per second?
The average speed of the space shuttled in miles per second is 5 miles.
How big is the Space Shuttle?The Space Transport is a resigned, to some degree reusable low Earth orbital rocket framework worked from 1981 to 2011 by the U.S. Public Flying and Space Organization as a feature of the Space Transport program. It's true program name was Space Transportation Framework, taken from a 1969 arrangement for an arrangement of reusable rocket where it was the main thing financed for improvement. A completely collected transport is 184 feet tall and weighs 4,500,000 pounds. The cove is 15 feet in breadth and 60 feet in length; sufficiently enormous to fit a school transport or 50,000 pounds of payload. The bus's speed on circle is around 17,500 mph. The bus has three primary components, the orbiter, the twin strong rocket sponsors and the outer tank.
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WILL MARK BRAINLIEST 5) A car slams on its breaks and comes to a complete stop over a
distance of 100m. If the car's rate of acceleration was -3.7 m/s², what
is the car's initial speed?
Answer:
27 m/s
Explanation:
Vf = Vo + a t
0 = vo + (-3.7)t
vo = 3.7t use this value in the next equation
Displacement = vo t + 1/2 a t^2
100 = 3.7t^2 + 1/2 (-3.7)(t^2 )
100 = 1.85 t^2 t = 7.352 s
vo= 3.7 t = 3.7 * 7.352 = 27. m/s
A solution is prepared by adding 1.43 mol of kcl to 889 g of water. the concentration of kcl is ________ molal.
A solution is prepared by adding 1.43 mol of KCL to 889 g of water. The concentration of KCL is 1.61 molal.
What is molality?Molar concentration, also known as molarity, quantity concentration, or substance concentration, is a unit used to describe the amount of a substance in a solution expressed as a percentage of its volume.
The number of moles per liter, denoted by the unit symbol mol/L or mol/dm3 in SI units, is the most often used unit denoting molarity in chemistry. One mol/L of a solution’s concentration is referred to as one molar or 1 M.
Mol of Kcl (potassium chloride) = 1.43
water = 889 g = 0.889kg
Molality = Moles of solute/kilograms of solvent
So, it comes as m = 1.43/0.889 = 1.61 molal
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