A piston-cylinder device initially contains 50 L of liquid water at 40°C and 200 kPa. Heat is transferred to the water at constant pressure until the entire liquid is vaporized. (a) What is the mass of the water? (b) What is the final temperature? (c) Determine the total enthalpy change. (d) Show the process on a T-v diagram with respect to saturation lines.
Answers
(a) The mass of water is approximately 49.65 kg. (b) The final temperature of the water vapor will be 120°C. (c) The total enthalpy change is approximately 277,956 kJ. (d) Diagram shown below.
(a) To determine the mass of the water, we need to know its density at the given conditions. The density of water changes with temperature and pressure. At 40°C and 200 kPa, the density of water is approximately 993 kg/m³.
Since we have 50 L of water, we need to convert it to cubic meters:
50 L = 0.05 m³
Now we can calculate the mass of water:
Mass = Density * Volume
Mass = 993 kg/m³ * 0.05 m³
Mass ≈ 49.65 kg
Therefore, the mass of water is approximately 49.65 kg.
(b) To find the final temperature, we need to consider the phase change from liquid to vapor. At constant pressure, the temperature will remain constant until all the liquid water has vaporized. This temperature is called the saturation temperature.
We can determine the saturation temperature at 200 kPa using a steam table or other relevant data sources. Let's assume that the saturation temperature is 120°C.
Therefore, the final temperature of the water vapor will be 120°C.
(c) To calculate the total enthalpy change, we need to consider the energy required to heat the water from its initial temperature to the saturation temperature, as well as the energy required for the phase change from liquid to vapor.
The enthalpy change during heating can be calculated using the formula:
ΔH1 = Mass * Specific Heat Capacity * ΔT1
Where:
Mass = 49.65 kg (from part a)
Specific Heat Capacity = specific heat capacity of water at constant pressure = 4.18 kJ/(kg·°C)
ΔT1 = final temperature - initial temperature = 120°C - 40°C = 80°C
ΔH1 = 49.65 kg * 4.18 kJ/(kg·°C) * 80°C
ΔH1 ≈ 165,938 kJ
The enthalpy change during phase change can be calculated using the formula:
ΔH2 = Mass * Latent Heat of Vaporization
Where:
Mass = 49.65 kg (from part a)
Latent Heat of Vaporization = energy required to vaporize 1 kg of water = 2257 kJ/kg
ΔH2 = 49.65 kg * 2257 kJ/kg
ΔH2 ≈ 112,018 kJ
The total enthalpy change is the sum of ΔH1 and ΔH2:
Total Enthalpy Change = ΔH1 + ΔH2
Total Enthalpy Change ≈ 165,938 kJ + 112,018 kJ
Total Enthalpy Change ≈ 277,956 kJ
Therefore, the total enthalpy change is approximately 277,956 kJ.
(d) The process can be shown on a T-v (temperature-volume) diagram with respect to saturation lines. In this case, the process starts at the initial temperature and pressure (40°C, 200 kPa), and moves along the constant pressure line until reaching the saturation temperature (120°C). Then, the process follows the saturation line until the entire liquid is vaporized.
Here is a simplified representation of the process on a T-v diagram:
|
Saturation | |
Line | |
| |
| |
| |
| |
| |
| |
Initial |-----------------------------| Final
| |
| |
| |
| |
| |
|
This diagram is a rough representation and does not accurately reflect specific volume values or scale. It simply illustrates the general process from initial conditions to the final state along the constant pressure and saturation lines.
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Related Questions
Given the list of items, select all that are considered to be matter:
music
heat
air
dreams
water
gasoline
love
bacteria
thoughts
Answers
From the given list of items, examples of matter include, heat, air, water, gasoline, and bacteria.
What is matter?Matter is a substance made up of various types of particles that occupies physical space and has inertia.
A matter must have mass and occupy space.
Examples of matter include the following;
heatairwatergasolinebacteriaThus, from the given list of items, examples of matter include, heat, air, water, gasoline, and bacteria.
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A 3rd harmonic is being produced in a tube that is open at both ends. The tube is 3 meters long and
the speed of sound is 340 m/s. What frequency will an observer hear?
Answers
The frequency of the second harmonic is 880 Hz (a pitch of A5). The speed of sound through the pipe is 350 m/sec. Find the frequency of the first harmonic and the length of the pipe. The length of an air column is related mathematically to the wavelength of the wave which resonates within it.
You put on sunglasses and looks at the outside view. The sky is a little dark, but the reflection from a pond is much darker. Why?
A. Pond reflection is polarized
B. The light outside has changed.
C. Sunglasses are not polarized.
D. Skylight is polarized.
Answers
When you put on sunglasses and looks at the outside view, the sky is a little dark, but the reflection from a pond is much darker because Pond reflection is polarized. Option (A) is correct.
What is polarization?In the field of physics, polarization is referred to as a phenomena brought on by the fact that electromagnetic radiation is a wave.
Moving across space, electric and magnetic fields interact to form light. Light waves vibrate electrically and magnetically in perpendicular to one another. The magnetic field and electric field both move perpendicular to one another in different directions.
As a result, the direction of motion is perpendicular to both the plane occupied by the electric field and the plane of the magnetic field that is perpendicular to it.
These magnetic and electric vibrations can take place on a variety of planes. Unpolarized light is a type of light wave that vibrates in more than one plane. The sun, a lamp, and a tube light are all examples of unpolarized light sources.
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you made $100,000 this year. you have $0 in adjustments, $11,500 in deductions and $7,300 in exemptions. What is your taxable increase?
Answers
The tax rate you will pay is displayed in tax brackets for each category of taxable income.
Thus, For instance, in 2022, the first $10,275 of your taxable income is subject to the lowest tax rate of 10% if you are single.
Up until the maximum amount of your taxable income, the following portion of your income is taxed at a rate of 12%.
As taxable income rises, the tax rate rises under the progressive tax system. Overall, this has the result that taxpayers with higher incomes often pay a greater rate of income tax than taxpayers with lower incomes.
Thus, The tax rate you will pay is displayed in tax brackets for each category of taxable income.
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The density of water in a lake is 1000 kg/m³
At a depth of 25m beneath the surface of the lake, the total pressure is 3.5×10⁵ Pa
(a) State what is meant by pressure.
(b) The gravitational field strength is 10 N/kg
. Determine:
(i) the pressure due to 25m of water
pressure =
(ii) the atmospheric pressure=____
atmospheric pressure =_____
Answers
(i) The pressure due to 25m of water is 250,000 Pa.
(ii) The atmospheric pressure is 100,000 Pa.
What is pressure?
Pressure can be defined as the force per unit area of an object.
Mathematically, the formula for pressure of an object is derived as;
P = F/A
where;
F is the applied force on the objectA is the area of the objectP = (mg) / (V/h)
P = (mgh) / V
P = (m/V)gh
where;
m is massV is volume of the objectg is acceleration due to gravityh is height or depthDensity of an object or a substance is known as mass per unit volume of the substance.
P = (ρ)gh
where;
ρ is the densityThe pressure due to 25m of water is calculated as follows;
pressure = (ρ)gh
pressure = 1000 kg/m³ x 10 N/kg x 25 m
pressure = 250,000 Pa
The atmospheric pressure is calculated as;
P(atm) = P(total) - P(water)
P(atm) = 350,000 Pa - 250,000 Pa
P(atm) = 100,000 Pa
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please help 9.2.1 project in science just ned an example
Answers
Answer:
Give me what kind of example you need please so I can help you. Put it in the comments.
Explanation:
A person pushes a 40 kg box across a horizontal surface with a constant speed of 3.5 m/s. The coefficient of sliding friction is 0.7. What power is supplied to the box by the person?
Answers
The given problem can be exemplified in the following diagram:
In the diagram we have:
\(\begin{gathered} F=\text{ Pushing force} \\ m=\text{ mass} \\ g=\text{ acceleration of gravity} \\ F_f=\text{ friction force} \\ N=\text{ normal force} \end{gathered}\)Now, the power supplied by the pushing force is given by:
\(P=Fv\)Where:
\(v=\text{ velocity}\)Therefore, we need to determine the value of the pushing force "F". To do that we will add the forces in the horizontal direction. We will take the forces to right as positive:
\(\Sigma F_h=F-F_f\)Since the object moves at a constant speed this means that the acceleration is zero and therefore, the sum of the forces is also zero, therefore:
\(F-F_f=0\)Now we solve for the pushing force by addig the friction force to both sides:
\(F=F_f\)The friction force is given by:
\(F_f=\mu N\)Where:
\(\begin{gathered} \mu=\text{ coefficient of friction} \\ N=\text{ normal force} \end{gathered}\)Now we need to determine the value of the normal force. To do that we will add the forces in the vertical direction. We will take the forces upwards as positive:
\(\Sigma F_v=N-mg\)Since there is no movement in the vertical direction the sum of these forces must be zero, therefore:
\(N-mg=0\)Now we solve for the normal force by adding "mg" to both sides:
\(N=mg\)Now we substitute this value in the expression for the friction force:
\(F_f=\mu mg\)Now we substitute this value in the expression for the pushing force:
\(F=\mu mg\)Now we substitute the given values:
\(F=(0.7)(40\operatorname{kg})(9.8\frac{m}{s^2})\)Now we solve the operations:
\(F=274.4N\)Now we substitute this value in the expression for power:
\(P=(274.4N)(3.5\frac{m}{s})\)Solving the operations:
\(P=960.4W\)Therefore, the power supplied by the pushing force is 960.4 Watts.
A dump truck contains a load of soil. Which action will leave the dump truck's
inertia unchanged?
A. Dump out some of the soil.
B. Add gas to its fuel tank.
C. Add more soil.
D. Increase the force applied by the engine.
Answers
Answer:
D
Explanation:
This will not change the weight and therefore not change the inertia
A dump truck contains a load of soil. The action that will leave the dump truck's inertia unchanged is that increase the force applied by the engine. Hence, option D is correct.
What is inertia?A body's ability to resist being propelled into motion or, if already moving, to modify the direction or magnitude of its velocity is known as inertia.
An object's lethargy is a passive quality that prevents it from doing anything other than obstructing active forces and torques. The only reason a moving body continues to move is the lack of a force that might slow it down, alter its trajectory, or accelerate it. This is not due to inertia.
A body's inertia moment about a certain axis and its mass, which determine how resistant it is to the application of forces to that axis, respectively, are two statistical measures of inertia.
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What force acts on a projectile in the horizontal direction?
Answers
The force that acts on a projectile in the horizontal direction is Gravitational force.
A projectile is an object upon which the only force is gravity. Gravity acts to influence the vertical motion of the projectile, thus causing a vertical acceleration. The horizontal motion of the projectile is the result of the tendency of any object in motion to remain in motion at constant velocity.
Due to the absence of horizontal forces, a projectile remains in motion with a constant horizontal velocity. Horizontal forces are not required to keep a projectile moving horizontally. Hence, The only force acting upon a projectile is gravity.
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the mass of the velociraptor and cage together is 175 kg. What is the gravitational potential energy added when when the velociraptor and cage is lifted from the ground to a height of 9 m?
Answers
The gravitational potential energy added when the velociraptor and cage is lifted from the ground to a height of 9 m is approximately 15,998.95 joules.
What is Potential Energy?
Potential energy is a form of energy that is stored in an object due to its position or configuration in a system. It is the energy that an object has the potential to possess, or the ability to do work, as a result of its position or state.
The gravitational potential energy (GPE) added when the velociraptor and cage is lifted from the ground to a height of 9 m can be calculated using the formula:
GPE = mgh
Where m is the mass of the velociraptor and cage, g is the acceleration due to gravity (approximately 9.81 m/\(s^{2}\)), and h is the height lifted.
Given that the mass of the velociraptor and cage together is 175 kg, and the height lifted is 9 m, we can substitute these values into the formula:
GPE = mgh
GPE = (175 kg) x (9.81 m/\(s^{2}\)) x (9 m)
GPE = 15,998.95 J (joules)
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Ruby was training for a race at the high school track. She took her dog walked 2250 meters in 15 minutes. Calculate the average speed
Answers
Answer:
Average speed \(= 2.5\) meter per second
Explanation:
Given
The total distance walked \(= 2250\) meters
The total time taken to walk \(2250\) meters is \(15\) minutes
In one minute there are \(60\) seconds
As we know Average speed is equal to total distance travelled divided by total time taken
Hence,
Average speed
\(\frac{2250}{15*60} \\2.5\)meter per second
A car travels 20 meters east
in 1.0 second and then travels
10 meters west in 20 seconds. The
displacement of the car at the end
of this 3.0-second interval is-
Answers
Answer:
Alright the other day.
Water flows at a speed of 13 m/s through a pipe that has a diameter of 1.2 m. What is the
diameter of the smaller end of the pipe that the water comes out with a speed of 30 m/s?
Answers
The diameter of the smaller end of the pipe is approximately 0.78 meters.
To determine the diameter of the smaller end of the pipe, we can use the principle of conservation of mass. According to this principle, the mass flow rate of water should remain constant throughout the pipe.
The mass flow rate is given by the equation:
Mass flow rate = density of water * cross-sectional area * velocity
Since the density of the water remains constant, we can write:
Cross-sectional area1 * velocity1 = Cross-sectional area2 * velocity2
Given that the velocity1 is 13 m/s, the diameter1 is 1.2 m, and the velocity2 is 30 m/s, we can solve for the diameter2 using the equation:
(pi * (diameter1/2)^2) * velocity1 = (pi * (diameter2/2)^2) * velocity2
Simplifying the equation:
(1.2/2)^2 * 13 = (diameter2/2)^2 * 30
Calculating the equation:
(0.6)^2 * 13 = (diameter2/2)^2 * 30
0.36 * 13 = (diameter2/2)^2 * 30
4.68 = (diameter2/2)^2 * 30
Dividing both sides by 30:
0.156 = (diameter2/2)^2
Taking the square root of both sides:
0.39 = diameter2/2
Multiplying both sides by 2:
0.78 = diameter2
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At what separation will two charges, each of magnitude 6.0 μC, exert a force of 0.70 N on
each other?
Answers
The given magnitude of the two charges are 6μc and they exert a force of 0.7N on each other. We need to find the distance of separation between the particles.
By Coloumb's Law :-
\(\sf\longrightarrow F =\dfrac{1}{4\pi\epsilon_0} \dfrac{q_1q_2}{r^2} \)
where
q1 and q2 are the two charges r is the distance of separation1/4πe0 = 9 * 10⁹Substitute the respective values,
\(\sf\longrightarrow \) 0.7 = {(9*10⁹) (6*6) (10-⁶ *10-⁶) }/ r²
\(\sf\longrightarrow \) r² = (36*9 * 10-³)/0.7
\(\sf\longrightarrow \) r =√{ 36*9*10-³)/√7 m
\(\sf\longrightarrow \) r = 6* 3* 10-¹ /√70 m
\(\sf\longrightarrow \) r = 0.21 m
And we are done!
Bella is taking an adventurous trip through the jungle. First, she trekked for 1 hour into the thick jungle at an average speed of 6 km/h. next, she took a boat to cross a lake which rode her at an average speed of 20 km/h for 0.5 hours. for the lost part of her trip, she hiked for 2 hours at an average speed of 4 km/h. find the total distance on her trip.
Answers
The total distance of Bella's trip through the jungle is 24 kilometers.
To find the total distance of Bella's trip, we need to calculate the distance traveled during each leg of her journey and then sum them up.
Let's calculate the distance traveled in each segment:
Trekking in the thick jungle:
Bella trekked for 1 hour at an average speed of 6 km/h.
Distance = Speed × Time
Distance = 6 km/h × 1 hour
Distance = 6 km
Crossing the lake by boat:
Bella rode a boat at an average speed of 20 km/h for 0.5 hours.
Distance = Speed × Time
Distance = 20 km/h × 0.5 hour
Distance = 10 km
Hiking for the remaining part:
Bella hiked for 2 hours at an average speed of 4 km/h.
Distance = Speed × Time
Distance = 4 km/h × 2 hours
Distance = 8 km
Now, let's calculate the total distance:
Total distance = Distance of trekking + Distance of crossing the lake + Distance of hiking
Total distance = 6 km + 10 km + 8 km
Total distance = 24 km
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A wheelbarrow is an example of which simple machine?
O pulley
O lever
O screw
wheel and axel
Answers
What is the frequency of an xray with a wavelength of 2x10-10m?
a) 1.5x1018hz
b) 6.67x10-19hz
c) 3x108hz
d) 1.5hz
Show calculation
Answers
Answer:
1.5 x 10¹⁸hz
Explanation:
Given parameters:
Wavelength = 2 x 10⁻¹⁰m
Unknown:
Frequency = ?
Solution:
To find the frequency, use the expression below;
V = f x wavelength
V is the speed of light = 3 x 10⁸m/s
f is the frequency
Now;
Insert the parameters
3 x 10⁸ = 2 x 10⁻¹⁰ x frequency
Wavelength = \(\frac{3 x 10^{8} }{2 x 10^{-10} }\) = 1.5 x 10¹⁸hz
2. What does SCA stand for? (1 Point) Student Conservation Association h Securities Class Action Sudden Cardiac Arrest Solar Cell Array:',)
Answers
Answer:
sudden cardiac arrest
Explanation:
Which law of thermodynamics does each of the following scenarios violate (if any)?
A machine that pulls all thermal energy out of a refrigerated space
1.
The first law of thermodynamics
2.
The second law of thermodynamics
3.
The third law of thermodynamics
4.
It is allowed
A machine that can pull 1000J of heat out of a refrigerated space and into a warmer space without external work
1.
The first law of thermodynamics
2.
The second law of thermodynamics
3.
The third law of thermodynamics
4.
It is allowed
A machine that can turn 1000J of heat directly into 1000J of electricity
1.
The first law of thermodynamics
2.
The second law of thermodynamics
3.
The third law of thermodynamics
4.
It is allowed
A machine that can create 1000J of heat from 100J of electricity
1.
The first law of thermodynamics
2.
The second law of thermodynamics
3.
The third law of thermodynamics
4.
It is allowed
A machine that can pull 1000J of heat out of a refrigerated space and put 1500J of heat into a warmer space if it uses 500J of external work
1.
The first law of thermodynamics
2.
The second law of thermodynamics
3.
The third law of thermodynamics
4.
It is allowed
Answers
Below are the required answers and explanations for each of the scenarios listed.
1. A machine that pulls all thermal energy out of a refrigerated space: This violates the second law of thermodynamics. This is because the second law of thermodynamics states that no heat engine can have an efficiency of 100 percent, and no heat transfer can occur from a colder to a warmer object without external work being done.
2. A machine that can pull 1000J of heat out of a refrigerated space and into a warmer space without external work: This violates the second law of thermodynamics. The second law of thermodynamics states that no heat transfer can occur from a colder to a warmer object without external work being done.
3. A machine that can turn 1000J of heat directly into 1000J of electricity: This does not violate any of the laws of thermodynamics.
4. A machine that can create 1000J of heat from 100J of electricity: This does not violate any of the laws of thermodynamics.
5. A machine that can pull 1000J of heat out of a refrigerated space and put 1500J of heat into a warmer space if it uses 500J of external work: This does not violate any of the laws of thermodynamics.
a) Option 2 is correct answer.
b) Option 2 is correct answer.
c) Option 4 is correct answer.
d) Option 4 is correct answer
e) Option 4 is correct answer.
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Which observation is evidence that electromagnetic radiation (EMR) has particle-like
properties? (1 point)
O EMR refracts as it moves into a different medium.
O
A diffraction pattern is observed when EMR passes through a narrow slit.
O Some EMR is blocked when it passes through a polarized lens.
O EMR with energy above a certain value can eject electrons out of a metal.
Answers
The observation that electromagnetic radiation with energy above a certain value can eject electrons out of a metal is a piece of evidence that they have particle-like properties.
Electromagnetic radiations as particlesThe observation that electromagnetic radiation with energy above a certain value can eject electrons out of a metal is a piece of evidence that they have particle-like properties.
This observation that electromagnetic radiation behaves like particles is known as the photoelectric effect.
It provides evidence that electromagnetic radiation exhibits particle-like properties. When EMR with sufficient energy (above a certain threshold) interacts with a metal surface, it can cause the ejection of electrons from the metal.
This behavior indicates that EMR behaves as discrete packets of energy called photons, which transfer their energy to the electrons and cause their release. The photoelectric effect supports the particle nature of EMR and is a fundamental concept in the field of quantum mechanics.
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which of the following statements about blood alcohol concentration (BAC) are true?
A. its illegal for a driver under 21 years of age of to drive with a BAC of 0.02% or above
B. it is illegal for a driver at any age to drive with a BAC of 0.08% or above
C. Both A and B are true
D. Neither A or B
Answers
A student trying to calculate the coefficient of friction between a box and a surface. She measures that the 80kg box will slide if the student pushes with a force greater than 400n.
Answers
Answer:
\(\mu_s=0.51\)
Explanation:
Coefficient of friction
The static coefficient of friction is a measure of the force needed to start moving an object from rest along a rough surface.
It's calculated as:
\(\displaystyle \mu_s=\frac{F_r}{N}\)
Where Fr is the friction force and N is the normal force exerted by the surface over the object.
In the absence of any other vertical force, the normal is equal to the weight of the object:
\(N = W = m.g\)
The box has a mass of m=80 Kg, thus the normal force is:
\(N = 80\ Kg * 9.8\ m/s^2\)
N = 784 N
The student needs to push with a force of 400 N to make the box move. That is the force that barely outcomes the friction force. Thus:
\(F_r=400\ N\)
Calculating the coefficient:
\(\displaystyle \mu_s=\frac{400}{784}\)
\(\mathbf{\mu_s=0.51}\)
The time it takes for a disk to rotate 45 revolutions is 5.82 s. The angular velocity at the end of the 5.82 s time interval is 68 rad⋅s−1.a) Calculate the constant angular acceleration (in rad⋅s−2) of the disk.
Answers
Given data
*The given time is t = 5.82 s
*The given angular velocity is
\(\omega=68\text{ rad/s}\)*The number of the revolution is n = 45 revolutions
*The angular distance traveled is
\(\theta=2\pi n=2\pi(45)=90\pi\text{ rad}\)(a)
The formula for the constant angular acceleration is given by the rotational equation of motion as
\(\theta=\omega t-\frac{1}{2}\alpha t^2\)Substitute the known values in the above expression as
\(\begin{gathered} 90\pi=(68)(5.82)-\frac{1}{2}\alpha(5.82)^2 \\ \alpha=6.68rad.s^{-2} \end{gathered}\)Hence, the constant angular acceleration of the disk is 6.68 rad/s^2.
Questions:
1. Clara drives 250 km West to play a gig in Colombia City. After the gig he drives 450 km
east to jam with some musicians in Columbia. What distance did he cover? What was his
displacement?
Answers
Answer:
700km
Explanation:
going was 250km and leaving was 450
250+450=700
Hi everyone.
How are you all I hope you guys are fine.
question:why the symbol of Joule is capital (J)?
Answers
Answer:
The joule (symbol: J) is the basic SI unit of energy. A joule is equal to the kinetic energy of a kilogram mass moving at the speed of one meter per second (one joule is a kg⋅m2⋅s−2). ... Because it is named for a person, the first letter of the symbol is uppercase (J instead of j)
Explanation:
nozz 12. Figure P14.43 shows a stream of water in steady flow from a kitchen faucet. At the faucet the diameter of the stream is 0.960 cm. The stream fills a 125-cm3 container in 16.3 s. Find the diameter of the stream 13.0 cm below the opening of the faucet.
Answers
The diameter of the stream below the opening of the faucet is 1.94 cm.
How to find diameter?The diameter of the stream can be found using the formula for the velocity of steady flow in a cylindrical stream:
v = Q / (πr²)
Where Q is the volume flow rate (volume per time), v is the velocity, and r is the radius of the stream.
By rearranging this equation and using the known values of the volume and time, find the radius of the stream 13.0 cm below the opening of the faucet:
r² = Q / (πv) = (125 cm³) / (π x (13.0 cm)² / 4)
r = √(125 / (π x (13.0 cm)² / 4)) = 0.97 cm
2r = 2 x 0.97cm = 1.94 cm
So the diameter of the stream 13.0 cm below the opening of the faucet would be 1.94 cm.
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cheese is made of cheese
Answers
Cheese is made of casein protein, which is originally made from milk and is high in protein. The texture of the cheese is determined by the quality of the milk, so cow's milk cheese differs from goat's milk cheese.
What is a dairy product?
Diary products are made from milk, such as cheese, curd, yogurt, etc., but all of them have different nutrients. The quality of these dairy products depend upon the quality of the milk, as some milking animals have a higher concentration of fats in their milk than other animals. These dairy products are used in different industrial sectors, such as for making ice cream, chocolate, and different food products.
Hence, cheese is made up of casein proteins that are present in the milk.
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Hi I don’t really understand this question and could really use some help! :)
Answers
To find
The correct option in the blanks
Explanation
The electric force is given as
\(F=k\frac{qq^{\prime}}{r^2}\)Thus the force is directly proportional to the charges and inversely proportional to the square of the distance between them.
Conclusion
The correct option are
A. directly, inversely
How are magnetic fields like vectors?
Answers
Answer:Magnetic fields from two sources add up as vectors at each point, so the strength of the field is not necessarily the sum of the strengths1. Magnetic fields are vectors, which means they have direction as well as size. Therefore, the sum of two magnetic fields is not simply the sum of their magnitudes2.
Explanation:
why does gas have the most energy but moves the slowest
Answers
Gases have heavier molecules. Since all gases have the same average kinetic energy at the same temperature, lighter molecules move faster and heavier molecules move slower on average.