9 × 10²¹ electrons flow through a cross section of the wire in one hour.
What is the relation between current and charge?Mathematically, current = charge / timeIn S.I. unit, Charge is written in Coulomb and time in second. What is the amount of charge flown through a wire for one hour if it carries 0.4 A current?Charge= current × timeCurrent= 0.4 A, time = 1 hour= 3600 sCharge= 0.4× 3600= 1440 C
How many numbers of electrons present in 1440C of charge?One electron= 1.6 × 10^(-19) CSo, 1440 C = 1440/1.6 × 10^(-19)= 9 × 10²¹ electrons
Thus, we can conclude that the 9 × 10²¹ electrons flow through a cross section of the wire in one hour.
Learn more about current here:
brainly.com/question/25922783
#SPJ1
A horizontal 52-n force is needed to slide a box across a flat surface at a constant velocity of 3.5 m/s. what is the coefficient of kinetic friction between the box and the floor?
μk = 0.106 is the coefficient of kinetic friction between the box and the floor
When the box is moving across the flat surface with a constant velocity, the force applied to it must be equal to the kinetic frictional force applied to the object:
F = μk*W = μk*mg
Where,
F = Force applied on box = 52 N
m = mass of box = 50 kg
g = 9.8 m/s²
μk = coefficient of kinetic friction between box and floor
hence,
52 N = μk(50 kg)(9.8 m/s²)
μk = (52 N)/(490 N)
μk = 0.106
Kinetic friction is the name for a force that exists between sliding parts. A force opposing a body's forward motion is applied to one that is moving on the surface. The kinetic friction coefficient between the two materials will determine the magnitude of the force.
To learn more about kinetic friction please visit -
https://brainly.com/question/19557684
#SPJ4
What is the focal length (in meters) of a lens whose radius of curvature is 9. 2 m and has a refractive index 1. 2?
The focal length (in meters) of a lens whose radius of curvature is 9. 2 m and has a refractive index 1.2 will be 18.4 m
The focal length of a lens is determined when the lens is focused at infinity. Lens focal length tells us the angle of view—how much of the scene will be captured—and the magnification—how large individual elements will be.
Focal length of a lens is the distance between center of lens and focal point . Focal point is a point on principal axis , at which light rays parallel to principal axis meet after refraction through lens or seem to meet after refraction .
The radius of curvature is the radius of sphere formed by the convex or concave mirror. It is also equal to the distance between the pole and center of curvature. The sign convention for focal length and radius of curvature is the same.
focal length = 2 * radius of curvature
given
radius of curvature = 9.2 m
focal length = 2 * 9.2
= 18.4 m
To learn more about focal length here
https://brainly.com/question/16188698
#SPJ4
A 0. 20-kg ball is attached to a vertical spring. the spring constant is 28 n/m. when released from rest, how far does the ball fall before being brought to a momentary stop by the spring?
A 0. 20-kg ball is attached to a vertical spring. The spring constant is 28 n/m. when released from rest, the ball will fall at a distance of x = 0.14 m before being brought to a momentary stop by the spring.
The spring constant is the force needed to stretch or compress a spring, divided by the distance that the spring gets longer or shorter. It's used to determine stability or instability in a spring
Elastic potential energy is Potential energy stored as a result of deformation of an elastic object, such as the stretching of a spring. It is equal to the work done to stretch the spring, which depends upon the spring constant k as well as the distance stretched.
When ball is released from rest with spring , it will loose some potential energy . Hence , loss in potential energy of the ball = gain in potential energy of spring
m*g*x = 1/2 * k * [tex]x^{2}[/tex]
0.20 * 9.8 * x = 1/2 * 28 * [tex]x^{2}[/tex]
x = (2 * 0.20 * 9.8) / 28
x = 0.14 m
To learn more about spring constant here
https://brainly.com/question/14670501
#SPJ4
A sample of an ideal gas is heated, and its kelvin temperature doubles. What happens to the average speed of the molecules in the sample?
A sample of an ideal gas is heated, and its kelvin temperature doubles. The average speed of the molecules in the sample will increases by a factor of [tex]\sqrt{2}[/tex]
The root-mean square (RMS) velocity is the value of the square root of the sum of the squares of the stacking velocity values divided by the number of values. The RMS velocity is that of a wave through sub-surface layers of different interval velocities along a specific ray path.
Root mean square speed is a statistical measurement of speed.
The root mean square speed can be calculated as : V1 : [tex]\sqrt{3 R T / Mo}[/tex]
if temperature becomes double
let T1 is initial temperature
So , T2 = 2 * T1
now ,
Root mean square speed will be (V2) = [tex]\sqrt{(3 R (2T)) / Mo}[/tex]
= [tex]\sqrt{2}[/tex] * [tex]\sqrt{3 R T / Mo}[/tex]
= [tex]\sqrt{2}[/tex] V1
Thus when temperature becomes double, the root mean square speed increases by a factor of [tex]\sqrt{2}[/tex]
To learn more about root mean square velocity here
https://brainly.com/question/13751940
#SPJ4
The area along the retina that is highest in acuity and the most dense in cones is the ....
The area along the retina that is highest in acuity and the most dense in cones is the "fovea".
What is fovea?Macula lutea, a tiny, flat patch situated precisely in the middle of the posterior region of the retina, contains the fovea centralis. The fovea is heavily saturated in cone photoreceptors since it is accountable for high-acuity vision.
Some characteristics of fovea are-
The parafovea belt and also the perifovea outermost region encircle the fovea. The ganglion cell layers in the perifovea, the outermost zone, has two to four lines of cells and is where eye sight is below the ideal.The parafovea is indeed the intermediary belt, where it comprises and over five rows of cells and has the maximum density of cones. In comparison to the most central fovea, which has 50 cones per 100 micrometers, the perifovea has 12 cones per 100 micrometers.Sharp center vision, also known as foveal vision, is produced by the fovea and is essential for humans to engage in activities such as reading, driving, and other activities that place a high priority on visual detail.To know more about fovea, here
https://brainly.com/question/15173310
#SPJ4
Using the formula for the resonant frequency, find the resonant frequency of a lcr circuit with l = 1 mh, c = 560 pf?
For LCR circuit, the Resonant frequency is 212.68kHz.
Given LCR circuit has L= 1 mH, C= 560pf
f=1/{2*22\7*√[1×10^(-3)H]*√[56*10^(-12)F]
f=212.68kHz
About Resonance frequency:
Equation f = 1 / [2π×√(LC)] can be used to calculate the resonant frequency of the RLC circuit, where:
f is the resonant frequency.L is the inductor's inductance.C is the capacitor's capacitance.The frequency at which the transfer function reaches its highest value is known as the resonant frequency of an electrical system. Consequently, the greatest output for a given input can be obtained. It has been demonstrated that resonance occurs when the values of the capacitive and inductive impedances are equal.
Learn more about resonant frequency here:
https://brainly.com/question/13040523
#SPJ4
2. A rectangular block of weight 300N measures 0.1 m by 0.4 m by 1.5 m.
a) Draw a diagram to show how the block must rest to exert the maximum pressure on the ground. Calculate this
pressure.
b) Draw another diagram showing the position of minimum pressure. Calculate this pressure.
Answer:
that's all I could do.hope it helps.
Biomes on Earth have exhibited changes throughout history that have been caused by a variety of factors. Over the past 50 years, the amount of tropical rainforest acreage found throughout the world has decreased from 14.8 billion acres to 8.6 billion acres due to deforestation. What factor is likely most responsible for the changes observed in the world’s rainforests?
a.
volcanic activity
b.
human activity
c.
temperature changes
d.
solar eclipses
Please select the best answer from the choices provided
A
B
C
D
A 12 V battery is connected to a resistor, a light bulb, and a buzzer. What are the energy conversions that occur in the circuit?
The energy conservation that occurred in the circuit when a 12 V battery is connected to a resistor, a light bulb, and a buzzer is light energy (light bulb) and to sound energy (buzzer).
What is energy conservation?The principle of energy conservation states that energy can neither be created nor destroyed but can be transferred from one form to another.
When a 12 V battery is connected to a resistor, a light bulb, and a buzzer, the energy conservation that occur in the circuit is light energy (light bulb) and to sound energy (buzzer).
Thus, the energy conservation that occurred in the circuit when a 12 V battery is connected to a resistor, a light bulb, and a buzzer is light energy (light bulb) and to sound energy (buzzer).
Learn more about energy conservation here: https://brainly.com/question/166559
#SPJ1
What is the mass of an object that experiences a gravitational force of 685 n near earth's surface where g = 9.80 m/s2?
The mass of an object that experiences a gravitational force of 685 N near earth's surface where g = 9.80 m/s² is 98.89 kg.
What is gravitational force?Any two mass-containing objects are attracted to one another by the gravitational force. Because it consistently attempts to pull masses together rather than pushing them apart, the gravitational force is known as attractive.
In reality, everything in the cosmos is tugging on everything else, including you!
According to the question,
The gravitational force of 685 N near earth's surface.
The acceleration due to gravity is g = 9.80 m/s².
The formula for force acting of the body under the influence of gravitation is ;
Force = mass×acceleration
Substitute the given values;
685 = m×9.8
m = 685/9.8
m = 69.89 kg.
Therefore, mass of an object is 69.89 kg.
To know more about gravitational force, here
https://brainly.com/question/24783651
#SPJ4
Does the youth service project, or a civic organisation, or community service centre shows signs of strength?yes/no
Answer:
Yes
Explanation:
This helps youngsters be empathetic citizens
A town's vitality may be measured by the sensation of a youth service initiative organized by a civic group or community service center. The given statement exists true.
Exactly what does it mean when someone says they belong to a civic group?The word "civic organization" directs to any group of people in a community whose primary mission exists to encourage civic, philanthropic, or religious causes.
Youth involvement in the development, monitoring, reporting, and evaluation of devices, tactics, and programs may increase their likelihood of experiencing.
In conclusion, the strength may be displayed in the youth service initiative of a civic organization or a community service center. It showed what young people can do when they enact together. Education and capacity development are two methods that have been shown to improve youth engagement.
To learn more about civic organisation refer to:
https://brainly.com/question/7194496
#SPJ4
a man uses a 90 watt electric iron to press his clothes for an average of 4 hours a wpeek for five weeks if the cost of an electrical energy is acceptable per unit calculate the cost of energy for present
The cost of energy for pressing is 54 Kobo.
Units of electricity are measured in kilowatt-hours (kWh).
900-watt electric iron
Appliance usage = 4 hours a week for 5 weeks
The unit cost of electricity = 3 Kobo per kWh
Convert the wattage of the electric iron from watts to kilowatts.
1000 watts (W) = 1 kilowatt (kW)
⇒ 900 watts = 1 ÷ 1000 = 0.9 kilowatts
This means that the power consumption of the electric iron is 0.9 kW per hour of use.
Total hours spent pressing clothes:
= 4 hours per week for 5 weeks
= 4 × 5
= 20 hours
Total power consumption:
= number of kW × number of hours
= 0.9 × 20
= 18 kWh
To find the total cost, multiply the total kWh by the cost per kWh:
⇒ Cost = 18 × 3 = 54 Kobo
Therefore, the cost of energy is 54 Kobo
To know more about energy refer to: https://brainly.com/question/1580875
#SPJ1
The complete question is:
A man uses a 900-watt electric iron to press his clothes for an average of 4 hours a week for five weeks if the cost of electric energy is 3 Kobo per unit calculate the cost of electric energy for pressing.
A force of 100 N to the east and a force or 100 N to the west both act on an object of 10 kg. What is the acceleration of the object?
A. 10 m/s2 to the east
B. 100 m/s2 to the west
C. 0 m/s2, it does not accelerate
D. 100 m/s2 to the east
Answer:
C, it doesnt accelerate
Explanation:
F=ma
F = 100 east + 100 west
F = 100 east + (-100 east)
F = 0
0 = ma
in order to isolate acceleration, we would be dividing 0 by mass, which would equal 0
The astronomer who first worked out the mathematical description of black hole event horizons was?
Karl Schwarzschild devised the first general relativity model that would adequately describe a black hole in 1916.
What is Black Hole?
A black hole is an area of spacetime with such intense gravitational pull that nothing can escape from it, not even light or other electromagnetic waves. According to general relativity theory, a compact enough mass can bend spacetime into a black hole. The event horizon is the line beyond which there is no escape.
Black holes were once thought to be a mathematical curiosity, but theoretical research in the 1960s revealed that they were actually a general prediction of general relativity.
To know more about Black Hole refer:
https://brainly.com/question/7866362
#SPJ4
If the current through an inductor were doubled, the energy stored in the inductor would be.
Answer:
The energy stored in an inductor is given as:
EL=1/2 LI ²
So, when the current is doubled, the energy stored in the inductor will become 4 times.
F 2000. kg of ice cover your driveway, how many kilojoules of heat would be required to melt it? the heat of fusion of water is 334 j/g .
Answer:
668 000 kJ
Explanation:
2000 kg = 2000 000 gm
2000000 gm * 334 J/g = 668 000 000 J = 668 000 kJ
Katie rolls a toy car off the end of a table.
Answer:
The toy car will fall off Katie's hands and onto the ground .
Explanation:
This happens due to gravity.
A wave of wavelength 1.2m travels 11.2m to a wall in 2s. what's the frequency of the wave
Answer: f = 4.67 Hz
Explanation:
We can approximate the wave as a traveling wave, therefore the speed of the wave is constant
v = d / t
the total distance remember, in going to the wall and back is
d = 2 11.2 = 22.4 me
we substitute
v = 22.4 / 4.0
v = 5.6 m / s
now we can use the relationship between the speed of the wave, its wavelength and u frequency
v =λ f
f = v /λ
f = 5.6 / 1.2
f = 4.67 Hz
Suppose that this year a small country has a gdp of $100 billion. also assume that ig = $30 billion, c = $60 billion, and xn = − $10 billion. what is the value of g?
The government expenditure is $20 billion.
To find the answer, we have to know about the Gross Domestic Product.
How to find the government expenditure?The value of all the finished goods and services produced in an economy over the course of a year is determined by the gross domestic product, a macroeconomic metric Gross Domestic Product.Using the output approach, the gross domestic product is determined as follows:
[tex]GDP=C+I_g+G+X_n[/tex]
Where: C is conception, Ig is the gross investment, G is government expenditure, and Xn is the net exports.
Thus, the value of G is,[tex]G=GDP-C-I_g-X_n\\G=100-60-30+10=20 billion-dollers.[/tex]
Thus, we can conclude that, the government expenditure is $20 billion.
Learn more about the gross domestic product here:
https://brainly.com/question/15707668
#SPJ4
You connect a 9 v battery to a capacitor consisting of two circular plates of radius 0. 066 m separated by an air gap of 2. 0 mm. What is the charge on the positive plate?
On connecting a 9V battery to a Capacitor consisting of two circular plates of radius 0.066 m separated by an air gap of 2. 0 mm. The charge on the positive plate is 544.7 ×10⁻¹² C.
Capacitance of the capacitor is determined by the area of the plate of Capacitor and distance between the plates of capacitor.
Let the area of the Capacitor be A , radius of circular plates be r and distance between the plates of capacitor be d.
Given, Voltage, V = 9V
Radius, r = 0.066m
Distance, d = 2mm = 0.002m
Area of the Capacitor, A = πr²
A = π(0.066)²
A = 0.013m²
Capacitance, C = ε₀A / d
C = 8.85×10⁻¹²×0.013/0.002
C = 60.5 ×10⁻¹² F
C = 60.5 pF
We know that Q = CV where Q is the charge on capacitor.
Q = 60.5 ×10⁻¹² × 9
Q= 544.7 ×10⁻¹² C
Since, both plates of a capacitor acquire equal and opposite charge.
Hence the charge on the positive plate of the capacitor is 544.7 ×10⁻¹² C.
Learn more about Capacitance here, https://brainly.com/question/14746225
#SPJ4
Drag the tiles to the correct boxes to complete the pairs. identify the type of synthetic material used in each object. alloy ceramic polymer
Tuba - Alloy
Paper - Polymer
Pot - Ceramics
Alloy : An alloy is a substance which made up of two more than two types of metal.
Ceramics: Articles, figures made up of clay which are hardened by the action of heating.
Polymer: These are the substance composed repeating units of of same chemical units which held together by covalent bonds.
What are Synthetic materials ?Instead of using natural materials, synthetic products are created using chemicals or synthetic materials. Boots constructed of synthetic materials, such as synthetic rubber, may typically be washed in a machine.
Because they differ significantly from natural materials in terms of their qualities or have improved through time, synthetic fabrics are beneficial. For instance, elastic Lycra maintains its shape in waterproof plastic raincoats, which are also made of plastic.Learn more about Synthetic materials here:
https://brainly.com/question/25834689
#SPJ4
A capacitor is connected across an ac source. Suppose the frequency of the source is doubled. What happens to the capacitive reactance of the inductor?.
The capacitive reactance is reduced by a factor of 2.
Calculation:We know the capacitive reactance is given as,
[tex]Xc = \frac{1}{2\pi fC}[/tex]
where,
[tex]Xc[/tex] = capacitive reactance
f = frequency
C = capacitance
It is given that frequency is doubled, i.e.,
f' = 2f
To find,
[tex]Xc'[/tex] =?
[tex]Xc' = \frac{1}{2\pi f'C}[/tex]
[tex]= \frac{1}{2\pi 2f C}[/tex]
[tex]= \frac{1}{2} (\frac{1}{2\pi fC} )[/tex]
[tex]Xc'[/tex] [tex]= \frac{1}{2} Xc[/tex]
Therefore, the capacitive reactance is reduced by a factor of 2.
I understand the question you are looking for is this:
A capacitor is connected across an AC source. Suppose the frequency of the source is doubled. What happens to the capacitive reactant of the inductor?
The capacitive reactance is doubled.The capacitive reactance is traduced by a factor of 4.The capacitive reactance remains constant.The capacitive reactance is quadrupled.The capacitive reactance is reduced by a factor of 2.Learn more about capacitive reactance here:
https://brainly.com/question/23427243
#SPJ4
What is the magnitude BBB of the magnetic field at the location of the charge due to the current-carrying wire
The magnitude of the magnetic field at the location of the charge due to the current-carrying wire is given as B = μI/2πr.
What is magnetic field?A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.
A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field.
magnetic field due to the current-carrying wireThe magnitude of the magnetic field at the location of the charge due to the current-carrying wire is calculated as follows;
B = μI/2πr
where;
I is the current in the wirer is the location of the magnetic fieldμ is permeability of free spaceThus, the magnitude of the magnetic field at the location of the charge due to the current-carrying wire is given as B = μI/2πr.
Learn more about magnetic field here: https://brainly.com/question/7802337
#SPJ1
Is water wet?
I need an argument.
Answer:
no :)
Explanation:
ezzzzzzzzzzzzzzzzzzzz
Liquid water is not itself wet, but can make other solid materials wet. Wetness is the ability of a liquid to adhere to the surface of a solid, so when we say that something is wet, we mean that the liquid is sticking to the surface of a material.
current is passed through two parallel conductors in the same direction. If the conductors are placed near each other,they will
If current is passed through two parallel conductors in the same direction and the conductors are placed near each other, they will attract each other.
What is electric current?Electric current can be defined as the flow of electrons.
Since electrons are easily removed from atom and are very mobile, the flow of electrons constitute an electric current.
Materials which allow electric current to flow through them are known as conductors. Examples of conductors are metals, and electrolytes.
On the other hand, materials which do not allow electric current to pass through them are known as insulators. Examples of insulators are wood and rubber.
The flow of current is known as electricity.
Parallel conductors with current flowing through them in the same direction are attracted to each other as a result of a magnetic field produced by the flow of current.
In conclusion, conductors allow electric current to pass through and the flow of current through a conductor produces a magnetic field.
Learn more about parallel conductors at: https://brainly.com/question/17148082
#SPJ1
At what temperature must a hot reservoir operate in order to achieve a 30arnot efficiency when the cold reservoir operates at 200 °c?
At temperature 402.71° C must a hot reservoir operate in order to achieve a 30% Carnot efficiency when the cold reservoir operates at 200 °C.
The Carnot engine is a theoretical thermodynamic cycle proposed by Leonard Carnot. It estimates the maximum possible efficiency that a heat engine during the conversion process of heat into work and, conversely, working between two reservoirs can possess.
The Carnot efficiency depends only on the temperature of the hot source and the cold sink. Carnot efficiency describes the maximum thermal efficiency that a heat engine can achieve as permitted by the Second Law of Thermodynamics.
Given
Efficiency = 30 %
T2 = absolute temperature of the heat source = T2
T1 = absolute temperature of the heat sink = 200 °C
efficiency = T2 - T1 / T2
30 /100= T2 - 200 / T2
T2 = 675.71° K
T2 = 402.71° C
To learn more about Carnot efficiency here
https://brainly.com/question/14470167
#SPJ4
A small sports car collides head-on with a massive truck. The greater impact force (in magnitude) acts on? a) the car, b) the truck, c) neither, the force is the same on both
The greater impact force (in magnitude) acts on a) the car
Since , both the objects that is the car and a massive truck is coming and colliding with a certain speed , which means they are acquiring some momentum because of mass and speed , since they are coming with certain momentum when collided must have impacted each other.
Momentum is the measure of product of mass and velocity , if both of them are coming with same velocity then total dependency of impact will be on their masses , since truck is massive and car is small sports car , that means truck must have greater mass than the car , hence the greater impact force act on a) the car
To learn more about momentum here
https://brainly.com/question/24030570
#SPJ4
What does it mean when work is positive? Velocity is greater than kinetic energy. Kinetic energy is greater than velocity. The environment did work on an object. An object did work on the environment.
Work is said to be positive when Kinetic energy is greater than velocity (option B). Details about work can be found below.
What is work?Work is a measure of energy expended in moving an object; most commonly, force times distance. This means that no work is done if the object does not move.
However, work can either positive or negative depending on the direction of the object and the force applied.
When force and displacement are in the same direction, the work performed on an object is said to be positive work.
This further means that the kinetic energy, which is the energy due to motion, will be greater than the velocity of the object in order to overcome the object.
Therefore, work is said to be positive when kinetic energy is greater than velocity.
Learn more about work at: https://brainly.com/question/18094932
#SPJ1
Answer: (B) Kinetic energy is greater than velocity
Explanation:
A ________ is a collection of related data, equivalent to an electronic file cabinet.
Answer:
database
Explanation:
A database is a collection of related data, equivalent to an electronic file cabinet. The correct option is B.
What is a database?A database is a structured collection of data that is stored and accessed electronically in computing. Small databases can be kept on a file system, whereas large databases are kept on computer clusters or in the cloud.
A database is a well-organized gathering of information or data that is customarily entered into the system in a computer system. A database management system is usually in charge of such a database (DBMS).
A database system retail locations critical business data: the data, when analyzed, becomes valuable information about a company and aids in decision-making.
Database structure is the components of a database. This is actually a new way between entities.
Thus, the correct option is B.
For more details regarding database, visit:
https://brainly.com/question/6447559
#SPJ2
A)gallery
B)database
C)spreadsheet
D)presentation
A skater can spin faster by pulling her arms closer to her body or spin slower by spreading her arms out from her body. This is due to.
A skater can spin faster by pulling her arms closer to her body or spin slower by spreading her arms out from her body due to conservation of angular momentum.
What is conservation of angular momentum?
Conservation of angular momentum is a physical property of a spinning system such that its spin remains constant unless it is acted upon by an external force, or to put in another way, the speed of rotation is constant as long as net torque is zero.Angular momentum, sometimes also referred to as spin, is determined by an object's mass, its velocity and distance of an object's mass from the point of rotation. The nearer the mass is to its axis point or the more consolidated it is around that axis the greater its velocity.Learn more about the conservation of angular momentum with the help of the given link:
https://brainly.com/question/13324471
#SPJ4
