Answer:
1. factor that is dependent on the length of the material.
2. factor that is dependent on the area of the material
Explanation:
Resistance R is directly proportional to its length L of an object and it is inversely proportional to the crossectional area of that object.
Mathematically, this is represented as:
a) Resistance R is directly proportional to its length L of an object
R ∝ L ......... Equation 1
b) Resistance R is inversely proportional to the crossectional area (A) of an object
R ∝ 1/A ............ Equation 2
Combining the two equations together, we have:
Resistance R is directly proportional to its length L of an object
R ∝ L/A .......... Equation 3
Resistivity of a material is the natural or inherent or intrinsic property that a material has. The Resistivity of a material is not dependent on the length or crossectional area of such material. It is only temperature dependent.
The resistance of a material is also dependent on the resistivity of the material. This means the resistance of a material is directly proportional to the resistivity of the material.
R ∝ ρ........Equation 4
Combining Equation 4 and 3 together, we have:
R = ρL/A
Where:
R = Resistance
ρ = Resistivity
L = Length of the material
A = Crossectional area of the material
Resistance and resistivity are related by a factor that is dependent on the length of the material a factor that is dependent on the area of the material
A 50.0-g hard-boiled egg moves on the end of a spring with force constant k = 25.0 N/m. Its initial displacement is 0.300 m. A damping force Fx=−bvxF
x
​
=−bv
x
​
acts on the egg, and the amplitude of the motion decreases to 0.100 m in 5.00 s. Calculate the magnitude of the damping constant b.
Answer:
The correct answer will be "0.022 kg/s".
Explanation:
The given values are:
Initial amplitude,
A₁ = 0.3 m
Final amplitude,
A₂ = 0.1 m
Mass of a egg,
m = 50.0 g i.e., 0.050 kg
Time,
t = 5 sec
As we know,
⇒ [tex]A_{2}=A_{1}e^{(-\frac{b}{2m})t}[/tex]
So that, the damping constant will be:
⇒ [tex]b=\frac{2m}{t} log \frac{A_{1}}{A_{2}}[/tex]
On putting the estimated values, we get
⇒ [tex]b=\frac{2\times 0.050}{5}log \frac{0.3}{0.1}[/tex]
⇒ [tex]=\frac{0.1}{5} log \frac{0.3}{0.1}[/tex]
⇒ [tex]=0.02 \ log 3[/tex]
⇒ [tex]=0.0219 \ kg/sec \ or \ 0.022 \ kg/s[/tex]
I NEED HELP PLEASE, THANKS! Describe each Newton Law. :)
Explanation:
1st- states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction.
2nd- states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it. (most important law)
3rd- states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction. (law of action/reaction)
A ray of light traveling parallel to the principal axis of a concave mirror will be
reflected out through the mirror's
please help
Answer:
A ray of light traveling parallel to the principal axis of a concave mirror will be reflected out through the mirrors
Explanation: When a ray travelling parallel to the principle axis of a concave mirror then the light ray reflect out through the mirrors and passing through the focus.
Explanation:
Answer:
I hope this is the correct answer to your question, because ur question seems kinda wrong to me.
Explanation:
* when a ray of light traveling parallel to the principal axis of a concave mirror will be reflected out through the surface of the mirror and then passes through the focus .
What is a small sacle industry?
Which property of argon is used in light bulbs?
Answer:
Argon belongs to zero group, i.e., is a noble gas and thus is inert. Hence it will not react with the hot filaments. Hence it is used in fluorescent and incandescent light bulbs to stop the oxygen in the light bulbs from corroding the hot tungsten filament.
Explanation:
Which property of sugar makes it different from white crystalline sand?
Answer:
The property of sugar which makes it different from sand is that sugar can dissolve in water. Explanation: however the power of dissolving of sand is not present. This is due to the presence of interaction between sugar and water.
Explanation:
I hope that was useful
Consider a single slit that produces a first-order minimum at 16.5° when illuminated with monochromatic light. show answer No Attempt 50% Part (a) At what angle, in degrees, is the second-order minimum?
Answer:
[tex]\theta_2 = 34.61^0[/tex]
Explanation:
Path difference for the destructive interference of a single slit:
[tex]D sin \theta = n \lambda[/tex]
For the first - order minimum, n = 1, and [tex]\theta = \theta_1[/tex]
[tex]D sin \theta_1 = \lambda[/tex].........(1)
For the second - order minimum, n = 2, and [tex]\theta = \theta_2[/tex]
[tex]D sin \theta_2 = 2 \lambda[/tex].........(2)
Dividing equation (2) by equation (1):
[tex]\frac{D sin \theta_2}{Dsin \theta_1} = \frac{2 \lambda}{\lambda} \\\frac{ sin \theta_2}{sin \theta_1} = 2 \\\theta_1 = 16.5^0\\\frac{ sin \theta_2}{sin 16.5} = 2\\sin \theta_2 = 2 sin 16.5\\sin \theta_2 = 0.568\\\theta_2 = sin^{-1} 0.568\\\theta_2 = 34.61^0[/tex]
What activity level should participants be in when exercising in their target heart rate zone
Answer:
La frecuencia cardíaca objetivo durante las actividades de intensidad moderada es aproximadamente del 50 al 70% de la frecuencia cardíaca máxima, mientras que durante la actividad física intensa es de, aproximadamente, entre el 70 y el 85% del valor máximo.
I NEED HELP PLEASE, THANKS :) What does it mean when white light is diffracted and at a particular location the color seen is blue?
Answer:
This is because white light consists of 7 colours with different angles o deviation or retraction.
Explanation:
When a narrow beam of light is refracted by a prism the light spreads into a band of colours (called the spectrum of light )
But in this case if a blue colour is observed it is due to the angle of refraction ,for instance red is refracted the least and hence is seen
Answer:
When while light is diffracted and at a particular location blue color is seen, this means that blue color is reflected while all other colors will be absorbed. When the blue color is seen denotes the shortest wavelength being reflected and all other being absorbed at the specified location.
What does your body do with nutrients during the digestion process?
Answer:
the correct answer is
Explanation:
The small intestine absorbs most of the nutrients in your food,and your circulatory system passes them on to other parts of your body to store or use. Special cells helped absorbed nutrients cross the intestinal lining into your blood stream.
hope this works out!!!!
Which form of government shares goods and services equally, and the political power is disturbing among the people?
Answer:
Socialist
Explanation:
Answer: socialist
Explanation: A socialist form of government is where the goods and services are equally shared, and the political power is distributed among the people.
A softball player moving 3.89 m/s
starts a slide, decelerating at -1.44 m/s2
for 4.80 m. How much time does the
slide take?
Answer:
0.119 s
Explanation:
Given that
[tex]U=3.89\ m/s\\a=-1.44\ m/s^2\\S=4.8\ m[/tex]
Lets take final speed of the softball after covering 4.8 m = V
We know that
[tex]V^2=U^2+2aS\\V^2=3.89^2-2\times 1.44\times 4.8\\V=3.7\ m/s[/tex]
Also We know that
[tex]V=U+at\\[/tex]
Putting the value of V ,U and a in the previous equation We get
[tex]3.7=3.89-1.44\times t\\t=0.119\ s[/tex]
Therefore slide time will be 0.119 s
Answer:
1.9
Explanation:
I am on acellus and thats the right answer lol
2. A wave on a rope has a wavelength of 2.0 m and a frequency of 2.0 Hz. What is the speed of the
wave?
step# 1
step#2
step#3
Answer:
4 m/s or 4 meters per second.
Explanation:
In order to calculate the speed of wave, you multiply the wavelength in meters and the frequency of the Wave in Hertz. 2 times 2 equals 4. The wave speed is always in m/s considering that the wavelength is also in meters.
What are the four main reasons as to why, despite having an abundance of minerals and natural resources, Pakistan has been unable to realize its potential and has not been able to succeed like other countries having similar resources?
please answer me I am so much worry I will mark you as brainy and follow you also
Answer:
GDP growth rate is low
Political instability
Lack of technical skills due to low literacy rate
Pressure from neighboring countries
Explanation:
Gross Domestic Product growth rate of Pakistan is much lower than many developed countries. The GDP growth rate for Pakistan is nearly 5% which is not even stable and it variate from plans. Due to which Pakistan is unable to use its available resources to the fullest. Also one of major issue is political instability in the country. After the loss of great leader Quaid e Azam Pakistan has not faced any loyal leader till date.
Noise pollution, health issues, lack of provision of basic necessities to many are few other factors which give rise to poor law and order situation in the country. Lack of availability of heavy machinery and poor infrastructure has contributed to the country decline. There is abundance of natural resources in the country but due to these issues the country is unable to deal with the challenges.
The pressures from neighboring countries have made the situation even worst. The heavy loan burden is restricting the country from development. The covenants imposed by the lenders have limited the country's ability to use its natural resources and become stable.
10). Three - fourth of the volume of a block which is floating in water extends above the surface
of the water. What is the density of the block?
Answer:
Explanation:
Fill the graduated cylinder partially with water to a level where you can submerge the object and drop the sinker weight into the water. If you don't have a graduated cylinder to fit your object, put a cylinder in a basin, fill it to the top with water and measure the overflow into the basin. Your answer will be less accurate because of the number of times the water has been moved. Note the amount of displacement in milliliters (ml) caused by the sinker and string.
Measure the mass of your object (say a cork) on a balance scale in grams (g). Be sure the object is dry when it is measured. Record its weight. Attach the sinker with the string to the object. If you use a staple or pin, be sure to include that when you measure the displacement of the sinker in step one.
A train starts from rest .It moves through 1km in 100s with uniform accelaration . What will be its speed at the end pf 100 s
Answer:
Explanation:
Distance = 1 km
= 1000m
Time = 100 sec
Speed = distance / time
= 1000 / 100
= 10 m/s
Which of the following represents the equation of motion of a steel ball thrown into a viscous liquid when it is moving with an acceleration a ?(A) W-V-U=ma (B)W-U=ma-V (C)W-U-V=0 (D)U-V=W
Answer: A
Explanation: When a steel ball is thrown into a viscous liquid, three forces will act on the ball.
1.) The viscous drag force V which is acting upward
2.) The buoyant force U which is acting upward and
3.) The weight of the ball W. Which is acting downward.
When it is moving with an acceleration a, the weight W will be greater than U and V
Since Force = ma.
The resultant vector force will be
W - V - U = ma
All matter is made up of________ called atoms or molecules
PLEASE ANSWER FOR BRAINLIEST!! A guitar string vibrates with a frequency of 4 kHz. What is the period of the waves in seconds?
Answer:
T = 0.00025 secs
Explanation:
Given:
Frequency = 4 kHz = 4000 Hz
Required:
Time Period = ?
Formula:
T = 1/f
Solution:
T = 1/4000
T = 0.00025 secs
Answer:
0.00025 seconds
Explanation:
Time period = 1 / frequency
= 1/4000
= 0.00025 seconds
Hope this helps, and please mark me brainliest if it does!
a rollercoaster car is moving 19.8 m/s on flat ground when it’s hits the brakes. it decelerates at -3.77 m/s^2 over the next 45.8 m. how much time does it take?
Answer:
3.44 s
Explanation:
Given:
Δx = 45.8 m
v₀ = 19.8 m/s
a = -3.77 m/s²
Find: t
Δx = v₀ t + ½ at²
45.8 = 19.8 t + ½ (-3.77) t²
45.8 = 19.8 t − 1.885 t²
1.885 t² − 19.8 t + 45.8 = 0
t = [ -b ± √(b² − 4ac) ] / 2a
t = [ 19.8 ± √((-19.8)² − 4 (1.885) (45.8)) ] / 2(1.885)
t = [ 19.8 ± √(392.04 − 345.332) ] / 3.77
t = 3.44 or 7.06
The first time, 3.44 seconds, is correct.
The second time is the time it would take the car to return to 45.8 m if it continued decelerating after stopping.
I NEED HELP PLEASE, THANKS!
Find or draw at least two pictures that illustrates Newtons first Law. Write a paragraph describing how each of the pictures you choose illustrates the law.
Explanation:
When a person is standing still, the forces acting on them (weight force pulling down and normal force pushing up) are equal and opposite, so the net force is balanced. So the person will continue to be at rest, unless the net force becomes unbalanced.
When a person falls with a parachute, the forces acting on them (weight force pulling down and air resistance pushing up) are equal and opposite, so the net force is balanced. So the person will continue to fall at the same speed until the net force becomes unbalanced.
How far away is a RR Lyrae variable star if it has a period of 0.5 days and a brightness of 2.3 x 10^-11 W/m^2?
Answer:
The answer is d =10^6.43 Mpc
Explanation:
Solution
To calculate the absolute magnitude of the star, we apply or use the relation with the period
Mv = - [ 2.76 (log₁₀ (P) - 1.0)] -4.16
Here P =+ 0.5 days
Mv = - 0.569
To calculate m, we have the following relation given below:
Mₓ = - 2.5 Log₁₀ (Fₓ/Fₓ,0)
Fₓ,0 = 1 w/m² (This is assumed)
Fₓ = 2.3 * 10^-11 W/m^2 (Given)
Thus
Mₓ = - 2.5 Log₁₀ (2.3 * 10^ ⁻11
Mₓ = 26.595
Now, applying the formula we have the following given below:
d = ₁₀ ( Mₓ -Mv + 5)/5
d =₁₀ (26.595 - 0.569 +5)/5
d =10^6.43 Mpc
The tissue of living organisms does not contain solid metal, like a copper wire or a zinc plate. However, electric current flows through nerves and muscles. How does current flow through living tissue?
Answer:
The human body contains certain elements such sodium, potassium, calcium, chlorine, and magnesium which possess specific electrical charges. These charged particles, called ions are obtained in our diet and are used by the body to generate electrical signals through their flow in and out of the cells.
Explanation:
The human body contains certain elements such sodium, potassium, calcium, chlorine, and magnesium which possess specific electrical charges. These charged particles, called ions are obtained in our diet and are used by the body to generate electricity by allowing them in or out of the cells. Thus, the flow of these ions through the body is the source of electricity in our bodies.
The cell membrane acts as a barrier separating these charges inside and outside the cells. Resting cells are negatively charged on the inside, while the outside environment is more positively charged. This is due to a difference in concentration between positive ions e.g. Na⁺ and K⁺ , and negative ions e.g. Cl⁻, inside and outside the cell. This separation of charges sets up a potential difference across the membrane known as membrane potential.
The flow of ions in and out of the cell is regulated by special proteins called ion channels. When impulse is received from the brain or other sensory receptors, positive charges flow into the cell through open ion channels in a process known as depolarization of the cell membrane. The depolarization of the cell triggers further electrical currents that can turn into electrical pulses, called action potentials. These action potentials occur at nerves and muscle (neuromuscular) junctions and are responsible for the different external responses we give to stimulus, like blinking of the eye, muscle contractions, heartbeats as well thought processes etc. Certain hormones and chemicals known as neurotransmitters are also involved in this process e.g. epinephrine, norepinephrine.
A stone is dropped from a tower of height 3600cm.Find the velocity by which it strike the ground.Also,find the time taken to reach the ground.
Answer:
Explanation:
Here h=36m, a=g=10m/s, u=0
Use s=ut+(1/2)at^2
36=0*t+(10t^2)/2
time=2.68 sec
As from the formula of final velovity, v=(2gh)^1/2
v=(2*10*36)^1/2
v=(720)^1/2
v=26.83………This is the final velocity
Answer:
Explanation:
s = vit + 1/2 gt*2
36 = 0 + 1/2 x 9.8 x t*2
t*2 = 7.34
t = 2.7sec
now,
2gs = vf*2 - vi*2
2 x 9.8 x 36 = vf*2 - 0
vf*2 = 705.6
vf = 26.5m/s
Si observamos un incremento de temperatura en un termómetro de 24 oC, ¿a cuántos grados Fahrenheit corresponde dicho incremento? ¿Y si el incremento de temperatura fuese de 24 K?
Responder:
24 ° C = 75.2 ° F 24K = -416.47 ° FExplicación:
La fórmula se utiliza para convertir grados Celsius (° C) en grados Fahrenheit (° F).
x ° C = (y ° F - 32) × 5/9.
Convertir 24 ° C a Fahrenheit
24 = (y ° F - 32) × 5/9.
24 * 9 = 5 (y ° F-32)
216 = 5 años ° F-160
5 ° F = 216 + 160
5 ° F = 376
y ° F = 376/5
y ° F = 75.2
24 ° C = 75.2 ° F
Para convertir Kelvin a Fahrenheit, usaremos la expresión;
(K - 273.15) × 9/5 + 32
Dado K = 24kelvin
24K a ° F = (24− 273.15) × 9/5 + 32
= -249.15 (9/5) + 32
= -448.47 + 32
= -416.47 ° F
24K = = -416.47 ° F
Indicar verdadero (V) o falso (F) con respecto al movimiento parabólico : la componente horizontal de la velocidad permanece constante. ( ) la componente vertical de la velocidad puede ser nula en un instante. ( ) La velocidad en todo momento es tangente a la trayectoria. ( )
Answer:
a) true, b) true, c) false
Explanation:
Este ejercicio de cinemática se pide revisar varias afirmaciones
a) Cierta. La velocidad horizontales consta
b) cierto. La velocidad vertical disminuye hasta llegar a cero en su altura máxima, la aceleración es negativa
C) False. Si la velocidad es tangente a la trayectoria el movimiento debe ser circular, pero este movimiento es parabólico
Traduction
This exercise in kinematics asks you to review several statements
a) true. The horizontal speed consists
b) true. The vertical speed decreases until it reaches zero at its maximum height, the acceleration is negative
C) False. If the speed is tangent to the path, the movement must be circular, but this movement is parabolic.
With respect to parabolic motion:
the horizontal component of the velocity remains constant is Truethe vertical component of the velocity can be null in an instant is True since the velocity changes with time due to gravitation acceleration. At the highest point of the projectile trajectory, the vertical velocity becomes zero.Speed at all times is tangent to the trajectory is True. The parabolic path of the trajectory is because of the changing vertical velocity.Con respecto al movimiento parabólico:
La componente horizontal de la velocidad permanece constante es True la componente vertical de la velocidad puede ser nula en un instante es True ya que la componente vertical de la velocidad cambia con el tiempo debido a la aceleración de la gravitación. En el punto más alto de la trayectoria del proyectil, la velocidad vertical se vuelve cero. La velocidad en todo momento es tangente a la trayectoria es Verdadera. La trayectoria parabólica de la trayectoria se debe a la velocidad vertical cambiante.Learn more about Parabolic motion:
https://brainly.com/question/4450437
Garret, Melody and Tony start their school day with brand new pencils. By the end of the day, they want to see who used his or her pencil the most. They decide that the shortest pencil will be the most used, and the longest pencil would be the least used. How should the students determine which pencil was used the most?
THEY SHOULD COMPARE THE LENGTH OF PENCILS WITH EACH OTHER .
HOPE IT HELPS.PLEASE MARK AS BRAINLIEST AND FOLLOW ME ......To which category does galaxy #4 belong? Why does it belong in this category?
Answer:
The Galaxy IV satellite belongs to the HS-601 model category. It was engineered by Hughes Space and Communications Company (HSC)
Explanation:
The Galaxy IV belong in this category because it is a communications satellite. It was built for direct television broadcasting, for private business networks and mobile communications.
Cheers!
Which refers to a measure of how acidic or basic a solution is? a]pH b]solubility c]reactiveness d]hardness
Answer:
Option(a) i.e" pH" is the correct answer to the given question .
Explanation:
The main objective of pH value is to determining whether the solution is the acidic or the basic solution.The pH is determining the solution whether it is basic or acidic with the help of there pH value .The range of the pH value is from 0 to 14 with the following parameter it determines whether the solution is basic ,acidic or the neutral solution .
If pH value is 7 then it is neutral solution .If pH value is greater then 7 then the solution is then it is basic solution .If the pH value is less then 7 then the solution is the Acidic solution .All the other option are not determining that whether the solution is acidic or the basic solution that's why these are incorrect option .
Answer:
the answer is A pH
got it right 2020
Explanation:
quick question plz.........If force acting on a body of mass 40kg is doubled. By how much will be the acceleration change?
A. By a factor of 2
B. By a factor of 3
C. By a factor of 4
D. remains the same
Answer:
if i'm not mistaken the answer is A
The new acceleration will be increase by the factor of 2. Hence, option (A) is correct.
Given data:
The mass of body is, m = 40 kg.
We can use the Newton's second law to obtain the result of given problem. As per the Newton's second law, "The force applied by the given object is equal to the product of mass of object and the magnitude of acceleration of object". Then the expression is,
F = ma
a = F/m .....................................................................(1)
Here,
F is the force.
m is the mass.
a is the acceleration.
if the force acting in the mass of body of 40 kg is doubled. Then new acceleration will be,
F' = ma'
(2F) = ma'
2(F/m) = a'
From equation (1) we get,
a' = 2a
Thus, we can conclude that the new acceleration will be increase by the factor of 2. Hence, option (A) is correct.
Learn more about the Newton's Second Law here:
https://brainly.com/question/19860811