2)
2H₂O → 2H₂ + O₂
Describe the mass of the reactants and products given the balanced chemical reaction.
Answers
Reactants are substances that are present at the beginning of a chemical reaction.
Products are the substance(s) to the right of the arrow. A substance that remains after a chemical reaction is complete is known as a product.
Consider the balanced chemical equation:
2H₂O → 2H₂ + O₂
Hydrogen and oxygen are the reactants, and water is the product in the balanced equation.
The reactants and product symbols and formulae are known from the aforementioned equation.
One oxygen molecule and two hydrogen atoms unite to form two water molecules.
The ratio of reactant to product is 2 : 1 : 2.
The total mass of products is equal to the total mass of the reactants according to the law of conservation of mass.
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Related Questions
1. A 60 kg running back is moving east with a velocity of 9 m/s. What is their
momentum?
Answers
Answer:
\(\huge\boxed{\sf p = 540\ kg m/s}\)
Explanation:
Given data:
Mass = m = 60 kg
Velocity = v = 9 m/s
Required:
Momentum = p = ?
Formula:
p = mv
Solution:
p = (60)(9)
p = 540 kg m/s
\(\rule[225]{225}{2}\)
Hope this helped!
~AH1807hii can someone pls help me??
Answers
F = ma
F = 8.5 × 6
F = 51 N
................
alice is floating freely in her spacecraft, and you are accelerating away from her with an acceleration of 1g. suppose you claim that you are feeling the effects of a gravitational field. how can you explain the fact that alice is weightless? alice is floating freely in her spacecraft, and you are accelerating away from her with an acceleration of 1g. suppose you claim that you are feeling the effects of a gravitational field. how can you explain the fact that alice is weightless? she is weightless because she is in a not moving. she is weightless because she is in free-fall. she is weightless because she is moving at constant velocity. if you are in a gravitational field, then she cannot be weightless.
Answers
Alice is weightless because she is in free fall.
Free-fall occurs when an object is experiencing the force of gravity but is not experiencing any other forces, such as air resistance. Because Alice is in a spacecraft, air resistance is not a factor, so she is essentially in a vacuum.
When an object is in a vacuum, the only force acting upon it is gravity. Therefore, Alice is in free fall and is experiencing weightlessness. This is in contrast to you, who is experiencing 1g of acceleration due to the force of the engine of your spacecraft.
This force is greater than the force of gravity, so you are not in free fall, and thus you are feeling the effects of the gravitational field.
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2. if one visible red wave is 700 nm in length, and one visible violet wave is 400 nm in length How many possible colors can there be?
Answers
Between the value 400 nm and 700 nm there is an infinite amount of real values that can represent the length of a wavelength.
If we consider that each differente wavelength represents a different color, therefore there are infinite possible colors in the interval from 400 nm to 700 nm.
But if we consider only certain intervals of wavelength as certain colors, we can have for example 7 colors:
Violet, Indigo, Blue, Green, Yellow, Orange, Red.
Electric kettle with the resistance of 20-02.is used-to-heat:4 kg of water. If
the initial temperature of the water is 20°C, how much time-later will the water boil?
C-water=-4200 J/kg°C. The kettle uses:220 V voltage.
Picture=Example
Answers
Just repost it and hope he doesn’t find it
Its in the image. Physics Physics Physics
Answers
1. The wavelength of the wave is 0.4 m
2. The frequency is 10 Hertz
3. The wavelength will be half the original wavelength.
4. The frequency of the wave is 0.05 Hertz
1. How do i determine the wavelength?The wavelength of the wave can be obtain as follow:
Frequency of wave (f) = 2.0 KHz = 2.0 × 1000 = 200- HzSpeed of wave (c) of = 800 m/sWavelength (λ) = ?Velocity (v) = wavelength (λ) × frequency (f)
800 = wavelength × 2000
Divide both sides by 2000
Wavelength = 800 / 2000
Wavelength = 0.4 m
2. How do i determine the frequency?The frequency of the wave can be obtain as illustrated below:
Speed of wave (v) = 10 m/sWavelength of wave (λ) = 1 mFrequency of wave (f) =?Velocity (v) = wavelength (λ) × frequency (f)
10 = 1 × frequency
Frequency = 10 Hertz
3. How do i determine the wavelength?The wavelength of the wave can be obtain as shown below:
Initial frequency (f₁) = fInitial wavelength (λ₁) = λSpeed = ConstantNew frequency (f₂) = 2fNew wavelength (λ₂) =?v = fλ
Since v is constant, we have
f₁λ₁ = f₂λ₂
Thus, we have:
f × λ = 2f × λ₂
Divide both sides by 2f
λ₂ = fλ / 2f
λ₂ = λ / 2
Thus, we can conclude that the wavelength will be half the original wavelength
4. How do i determine the frequency?The frequency of the wave can be obtain as shown below:
Time taken = 2 minutes = 2 × 60 = 120 secondsNumber of wave = 6 complete wavesFrequency =?Frequency = Number of wave / time taken
Frequency = 6 / 120
Frequency = 0.05 Hertz
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Answer:
1. The wavelength of the wave is 0.4 m
2. The frequency is 10 Hertz
3. The wavelength will be half the original wavelength.
4. The frequency of the wave is 0.05 Hertz
1. How do i determine the wavelength?
The wavelength of the wave can be obtain as follow:
Frequency of wave (f) = 2.0 KHz = 2.0 × 1000 = 200- Hz
Speed of wave (c) of = 800 m/s
Wavelength (λ) = ?
Velocity (v) = wavelength (λ) × frequency (f)
800 = wavelength × 2000
Divide both sides by 2000
Wavelength = 800 / 2000
Wavelength = 0.4 m
2. How do i determine the frequency?
The frequency of the wave can be obtain as illustrated below:
Speed of wave (v) = 10 m/s
Wavelength of wave (λ) = 1 m
Frequency of wave (f) =?
Velocity (v) = wavelength (λ) × frequency (f)
10 = 1 × frequency
Frequency = 10 Hertz
3. How do i determine the wavelength?
The wavelength of the wave can be obtain as shown below:
Initial frequency (f₁) = f
Initial wavelength (λ₁) = λ
Speed = Constant
New frequency (f₂) = 2f
New wavelength (λ₂) =?
v = fλ
Since v is constant, we have
f₁λ₁ = f₂λ₂
Thus, we have:
f × λ = 2f × λ₂
Divide both sides by 2f
λ₂ = fλ / 2f
λ₂ = λ / 2
Thus, we can conclude that the wavelength will be half the original wavelength
4. How do i determine the frequency?
The frequency of the wave can be obtain as shown below:
Time taken = 2 minutes = 2 × 60 = 120 seconds
Number of wave = 6 complete waves
Frequency =?
Frequency = Number of wave / time taken
Frequency = 6 / 120
Frequency = 0.05 Hertz
Explanation:
1. When building a house using bricks a damp course is laid just above the brick foundation. Explain why the damp course is necessary
Answers
Answer:
Damp Proofing:
Explanation:
The presence of damp proofing is very necessary to maintain the health of a structure. DPC plays an important role in all types of buildings and it should be necessary to know about the importance, requirements, and properties of DPC. In many of the buildings all over the world, the rising damp may be due to a damaged damp-proof course, or sometimes, there may be not any damp proof course in a building.
A circuit contains a single 240-pF capacitor hooked across a battery. It is desired to store four times as much energy in a combination of two capacitors by adding a single capacitor to this one. What would its value be?
Answers
To store four times as much energy in a combination of two capacitors by adding a single capacitor to this one. Thus, the capacitance of the added capacitor should be: 3(240 pF) = 720 pF.
To begin with, the energy stored by a capacitor in an electrical circuit is given by the equation:
E = 1/2CV^2...
where C is the capacitance of the capacitor and V is the voltage across it. The energy stored in the circuit is equal to the energy stored in the capacitor,
so the formula can be rewritten as follows:
E = 1/2C(∆V)^2...
where ∆V is the voltage across the capacitor.
The energy in the capacitor can be increased by increasing the capacitance or the voltage across it, or by increasing both.
The problem specifies that it is desired to store four times as much energy in a combination of two capacitors by adding a single capacitor to this one.
So, the energy stored in two capacitors can be expressed as:
E1 + E2 = 4E...
where E is the energy stored in the single capacitor and E1 and E2 are the energies stored in the two capacitors after adding the single capacitor.
Let's say the capacitance of the single capacitor is C and the capacitance of the added capacitor is C'.
Then, the total capacitance of the two capacitors can be expressed as:
C total = C + C'...
and the energy stored in each capacitor can be expressed as:
E = 1/2C(∆V)^2 and
E' = 1/2C'(∆V')^2...
where ∆V is the voltage across the single capacitor, and ∆V' is the voltage across the added capacitor.
The voltage across each capacitor is the same,
so ∆V = ∆V'.
Substituting these equations into the first equation,
we get:
1/2C(∆V)^2 + 1/2C'(∆V)^2 = 4[1/2C(∆V)^2].
which can be simplified to: C' = 3C...
Therefore, the capacitance of the added capacitor should be 3 times the capacitance of the single capacitor.
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10) A 57-kg packing crate is pulled with constant speed across a rough floor with a rope that is at an angle of 37° above the horizontal. If the tension in the rope is 142 N, how much work is done on the crate to move it 6.1 m?
Answers
F=m*a
T = 142N
Work = Force x distance
distance = 6.1 M
Force = 142 x cos 37 = 113.4 N
W= 113.4N x 6.1M = 691.78 J
If an object on a horizontal frictionless surface is attached to a spring, displaced, and then released, it will oscillate. If it is displaced a distance 0.110 m from its equilibrium position and released with zero initial speed. Then after a time 0.815 s its displacement is found to be a distance 0.110 m on the opposite side, and it has passed the equilibrium position once during this interval.
Find (a) the amplitude; (b) the period; (c) the frequency.
Answers
a)The amplitude of the wave will be 0.120m.
b)The period of the wave will be 1.60s.
What is the frequency?Frequency is defined as the number of repetitions of a wave occurring waves in 1 second.
a)The amplitude of the wave will be 0.120m.
A is the initial displacement =0.120m
The amplitude represents the largest deviation from equilibrium. So that the amplitude of the wave will be equal to the maximum position.
Hence the amplitude of the wave will be 0.120m.
b)The period of the wave will be 1.60s.
The movement from maximum positive displacement to maximum negative displacement. The time period will be;
\(\rm \frac{T}{2} = 0.800 \\\\\ T= 1.6 \ sec\)
Hence the period of the wave will be 1.60s.
c) The frequency of the wave will be 0.625Hz.
The frequency is inversely proportional to the time period. Frequency is found as;
\(\rm f=\frac{1}{T} \\\\ \rm f=\frac{1}{0.625} \\\\ \rm f=0.625 \ Hz\)
Hence the frequency of the wave will be 0.625Hz.
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During winter animals sit into curl why
Answers
Answer:
They sit into a curl so they can conserve body heat and stay warm during those cold winter months
Explanation:
During winter animals sit into curl in order to avoid cold and reduce the heat emission.
Why animals curl during winter?When the animals feel cold, they curl their bodies into a ball like structure so as to decrease the surface area of their bodies.
The total energy radiation by a body changes as the change occurs on the surface area of the body, the loss of heat due to radiation would be reduced so we can conclude that during winter animals sit into curl in order to avoid cold and reduce the heat emission.
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What is the approximate momentum of a car with a mass of 1200 kg and a velocity of 30 - km/hr(8.33 m/s) ?
Answers
Answer:
9996kg.m/s
Explanation:
∆p=mv. 1200kg*8.33m/s
The approximate momentum of this car is 9,996 Kgm/s.
Given the following data:
Mass = 1200 kg Velocity = 8.33 m/s
To determine the approximate momentum of this car;
Momentum refers to the product of the mass possessed by an object and its velocity.
Mathematically, momentum is giving by the formula;
\(Momentum = mass \times velocity\)
Substituting into the formula, we have;
\(Momentum = 1200 \times 8.33\)
Momentum = 9,996 Kgm/s.
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Identify and explain which ball most likely had the greatest speed.
Answers
pls help asap pls explain. Just before opening her parachute a skydiver having a mass of 50 kg reaches terminal velocity. Calculate the force of air resistance if the buoyant force is 20 N. Be careful! Use the skydiver’s mass to calculate his/her Fg (force of gravity).
Answers
Answer:
490N
Explanation:
Given that,
Mass of a skydiver, m = 50 kg
Buoyant force = 20 N
When the skydiver reaches the terminal velocity, net force on her is equal to 0. So, air drag is equal to the weight of the skydiver.
D = mg
Putting all the values,
D = 50 × 9.8
D = 490 N
So, the force of air resistance is 490 N.
We know that Gravitational Force F g
is given by F g
=G d 2
Mm
where - G is the universal gravitational constant - M and m are the masses of the two objects - d is the distance between the two objects and the acceleration due to gravity is given by g= d 2
GM
. We are interested in the change in g with distance between masses and for different masses so we are going to compare Earth, Moon, Mars and Jupiter. Task 1 Create a script 'task1.m' to create and save the following variables: - universal gravitational constant: G - mass, radius and names of Earth, Moon, Mars and Jupiter as arrays: mass, radius, planet respectively - refer to NASA:size, NASA:mass - height of different strata of Earth's atmosphere as an array: atmosphere - refer to Wikipedia: Atmosphere of Earth Use SI system units for each. Add comments to the script with information on the array indices and corresponding planet. Save the workspace as 'project_1.mat'. Remember dimensional homogeneity when using these values in equations. You are expected to load these values from memory to use in the following tasks. Task 2 Create a script function 'gcalculate.m' with a function 'gcalculate' to take G,M and d as inputs to return the value of g. The function and script name should be the same to use the function in other scripts. You should also be in the same directory or have the directory holding this script in Matlab's saved paths. Create a live script 'task2.mlx'. Load the stored variables from 'project_1.mat' and use the function 'gcalulate' in a loop to do the following: - Calculate and display the value of g at the surface of each planet. - Calculate and display the value of g at the different strata of Earth's atmosphere - Accept text input on desired planet and cistance to calculate and display g at that value - you need to check for valid inputs for each Create a script 'task3.m'. Load the stored variables from 'project_1.mat'. - Define an implicit function to calculate the value of g with a variable x for distance from the surface of the planet. - Sample 1000 evenly distributed values between [1,10 8
] and save as an array. - Calculate and plot a graph showing the variation of g with height for the different planets. The plot should be titled, axes labelled and have a legend clearly identifying each plot line. Save the plot as a figure - 'task3_graph.fig'.
Answers
Create three scripts: 'task1.m' to save variables, 'gcalculate.m' to calculate gravitational acceleration, and 'task3.m' to plot and analyze the variation of g with height for different planets, using stored variables from 'project_1.mat'.
Accomplish the given tasks, you need to create three MATLAB scripts: 'task1.m', 'gcalculate.m', and 'task3.m'.
In 'task1.m', you will define and save the required variables, such as the universal gravitational constant (G), masses, radii, and names of Earth, Moon, Mars, and Jupiter, as well as the heights of different strata of Earth's atmosphere. These values will be stored in the 'project_1.mat' workspace.
In 'gcalculate.m', you will create a function called 'gcalculate' that takes inputs G, M, and d to calculate and return the gravitational acceleration (g) using the given formula. This function will be used in the subsequent tasks.
In 'task2.mlx', you will load the stored variables from 'project_1.mat' and use the 'gcalculate' function in a loop to calculate and display the values of g at the surface of each planet and at different strata of Earth's atmosphere.
The script will also accept user input for the desired planet and distance to calculate and display the corresponding g value.
In 'task3.m', you will load the stored variables and define an implicit function to calculate g with respect to the variable x, representing the distance from the surface of the planet.
You will sample 1000 evenly distributed values for x, calculate the corresponding g values, and plot a graph showing the variation of g with height for different planets. The plot will be properly labeled and saved as 'task3_graph.fig'.
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Cassie walked to her friend's house with an average speed of 1.40 m/s. The distance between
the houses is 205 m. How long did the trip take her?
Answers
Answer:
146.4 s
Explanation:
Distance / rate = time
205 m / 1.4 m/s = 146.4 s
2. Arrange your magnet so that the hoop does the opposite of what it did previously (i.e., if it continued to move, make the hoop stop, and if it stopped, make it continue to move). How did the arrangement of the magnet differ in this case?
Answers
Answer:
Step-by-step explanation to arrange a magnet so that the hoop does the opposite of what it did previously:
1. Place the magnet on a flat surface.
2. Identify the direction that the hoop moved previously (i.e., whether it continued or stopped).
3. Turn the magnet so that the poles are facing in the opposite direction of the previous movement of the hoop.
4. Observe the new movement of the hoop and check if it is doing the opposite of the previous movement.
How did the arrangement of the magnet differ in this case? In this case, the arrangement of the magnet was different because the poles were faced in the opposite direction of the previous movement of the hoop. This change in the direction of the magnet's poles caused the hoop to move in the opposite direction.
if you were given a rock sample and told it contained 200 atoms and three half-lives had passed how much of the daughter isotope would you have? How much of the parent isotope?
Answers
After three half-lives, 1/8 (or 0.125) of the parent isotope remains. Thus, 0.125 times the parent atoms. The daughter isotope would be equivalent to the remaining parent isotope, 0.125 times the original number of parent atoms.
After three half-lives, the parent isotope has exponentially decayed, forming the daughter isotope. Each half-life reduces the parent isotope by half and increases the daughter isotope. Three half-lives have passed, reducing the parent isotope to 1/8 of its initial level. The rock sample would have 1/8 of the parent isotope.
The daughter isotope would have accumulated during decay. After three half-lives, the daughter isotope would have reached 3/8 of the parent isotope as each half-life creates one-half of it. After three half-lives, the rock sample would have 1/8 of the parent isotope and 3/8 of the daughter.
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Question 1
2 pts
A 93 kg person is skiing down a snowy hill, traveling at 9 m/s when they hit a 50 kg hiker on the skiing trail, who was standing still. The hiker ends
up moving backwards (in the direction the skier was moving) at 2 m/s after the collision. How fast, in m/s, will the skier be going right after the
collision? Enter your answer as just a number without units.
Answers
After the impact, the skier's speed will be 10.9 m/s.
What is conservation of momentum?The total amount of momentum prior to and following the impact are equal.
(m1 + m2)vi = m1vf1 + m2vf2 {where m1 and m2 stand for the skier and hiker's respective masses, vi for the skier's starting velocity, and vf1 and vf2 for the skier and hiker's respective end velocities.}
(93 kg + 50 kg)(9 m/s) = 93 kg(vf1) + 50 kg(2 m/s)
Simplifying and solving for vf1, we get:
vf1 = (143 kg × 9 m/s - 50 kg × 2 m/s) / 93 kg = 10.9 m/s
What is momentum?momentum is the result of a particle's mass and velocity. As a vector quantity, momentum possesses both magnitude and direction. According to Isaac Newton's second equation of motion, the force applied on a particle is equal to the time rate of change of momentum. Check out Newton's laws of motion.
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. A cyclist traveling southeast along a road at 15 km/h feels a wind blowing from the southwest at 25 km/h. To a stationary observer, what are the speed and direction of the wind
Answers
The speed and direction of the wind with respect to the observer is 10 km/h southwest.
Relative velocity of the wind
The velocity of the wind appears to be greater for the cyclist than a stationary observer with zero velocity.
\(V_o + V_c = V_w\)
where;
Vo is the velocity of the wind with respect to a stationary observerVc is the velocity of the cyclist with respect to the observerVw is velocity of the windVo = 25 - 15
Vo = 10 km/h southwest
Thus, the speed and direction of the wind with respect to the observer is 10 km/h southwest.
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What are 3 facts about electromagnets?.
Answers
Magnetic objects are either drawn to or pushed away by magnetism. When two magnets with the same poles are positioned close to one another, they push apart and repel. When two dissimilar poles are positioned close to one another, they pull and attract to one another.
What three qualities do electromagnets possess?A soft iron core makes up an electromagnet. You may alter the magnetic field's strength. Simply cutting off the electricity will demagnetize an electromagnet. Reversing the polarity is possible.
A unique class of magnets called electromagnets has the following characteristics: By switching the direction of the current flow, the polarity of the magnets may be changed. They function as magnets when an electric current is passing through them; they are transient magnets that may be turned on and off.
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Which of the following is not a benefits of improved flexibility?
A. it helps prevent injuries
B. It makes you muscles stronger
C. It improves your range of emotions
D. It helps prepare your body for workouts
Answers
In an experiment, a thin sheet of material A,B, or C was used to divide two objects of different temperature in each trial, the conditions were identical except for the material of the thin sheet. The data table shows
the times in which the objects reached thermal equilibrium
Which material, if any, is the best thermal equilibrium
Answers
The best material for achieving thermal equilibrium can be determined by analyzing the data table. The time taken for each object to reach thermal equilibrium is dependent on the material used to divide them.
Material C appears to be the best as it takes the least amount of time for the objects to reach thermal equilibrium.
Based on the given information, the material that results in the shortest time to reach thermal equilibrium would be considered the best thermal conductor. To determine this, compare the times in the data table for materials A, B, and C. The material with the shortest time to reach thermal equilibrium is the best thermal conductor and, therefore, the best material for this experiment.
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A crate of mass 90 kg rests on the floor. How much work is required to move the crate at a constant speed 6 m along the floor against a friction force of 180 N?
Answers
If the crate is moving at a constant speed, then there is zero net force on the crate, and hence no work is required.
More specifically, by Newton's second law the net horizontal force on the crate is
F - 180 N = 0
where F is the magnitude of the applied force. The right side is zero since constant speed = no acceleration. Then F = 180 N.
Now,
• work done by F = (180 N) (6 m) = 1080 J
• work done by friction = (-180 N) (6 m) = -1080 J
so the total work W is
W = 1080 J - 1080 J = 0 J
Alternatively, by the work-energy theorem, the total work done on the crate is equal to the change in its kinetic energy. But constant speed means initial and final velocities are equal; if v is this speed, then
W = 1/2 (90 kg) v² - 1/2 (90 kg) v² = 0 J
If the force squeezing two surfaces together is decreased, the force of dry sliding friction between the two surfaces will most likely: a. increase b. decrease c. stay about the same
Answers
If the force squeezing two surfaces together is decreased, the force of dry sliding friction between the two surfaces will most likely decrease.
therefore your answer is B)decrease
Hope this helps you- have a good day bro cya)
The force of dry sliding friction between the two surfaces will most likely decreases.
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
If the force squeezing two surfaces together is decreased, the force of dry sliding friction between the two surfaces will most likely decrease.
The force of dry sliding friction between the two surfaces will most likely decreases.
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3 resitor is connected in series to a 6 resior and a 12-v battery.what is the current in each of the resistors ? what is the voltage drop across each resitor?
Answers
The current in each resistor is 4 A, 2 A, and 4 A, respectively. The voltage drop across each resistor is 12 V.
When three resistors are connected in series with a six resistor and a 12-volt battery, the total resistance of the series circuit is R = R1 + R2 + R3 + ...
The current flowing through the circuit is the same at every point. So, if we want to know the current flowing through each resistor, we need to use Ohm's law, I = V/R, where V is the voltage of the battery and R is the resistance of each resistor.
I1 = V/R1 = 12/3 = 4 AI2 = V/R2 = 12/6 = 2 AI3 = V/R3 = 12/3 = 4 A. The voltage drop across each resistor can be calculated using Ohm's law, V = IR.
V1 = I1R1 = 4 x 3 = 12 VV2 = I2R2 = 2 x 6 = 12 VV3 = I3R3 = 4 x 3 = 12 V.
Therefore, the current in each resistor is 4 A, 2 A, and 4 A, respectively. The voltage drop across each resistor is 12 V.
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Graphs show relationships between two or more variables. Which three features describe a line graph?
A.
Shows how a variable changes in relation to another variable
done
B.
Has an x-axis and a y-axis
C.
Shows the dependent variable on the x-axis
D.
Has neither an x-axis nor a y-axis
done
E.
Shows the independent variable on the x-axis
Answers
Answer:
A, B, and E
Explanation:
C and D are wrong;
Line graphs do not show the dependent variable on the x-axis.
Line graphs do have both an x-axis and a y-axis.
A boy pulls a bag of baseball bats across a ball field toward the parking lot. The bag of bats has a mass of 6. 80 kg, and the boy exerts a horizontal force of 24. 0 n on the bag. As a result, the bag accelerates from rest to a speed of 1. 12 m>s in a distance of 5. 25 m. What is the coefficient of kinetic friction between the bag and the ground?
Answers
The coefficient of kinetic friction between the bag and the ground is found to be 0.0251. It represents the ratio of the frictional force to the normal force acting between them.
In this question, a boy pulls a bag of baseball bats across a ball field toward the parking lot. The bag of bats has a mass of 6.80 kg, and the boy exerts a horizontal force of 24.0 N on the bag. As a result, the bag accelerates from rest to a speed of 1.12 m/s at a distance of 5.25 m. We have to find the coefficient of kinetic friction between the bag and the ground.The formula used to find the coefficient of kinetic friction is given as,μk= (a/g) + μs (1 - a/g), Where, μk = coefficient of kinetic friction, a = acceleration of the body, g = acceleration due to gravity (9.8 m/s2), μs = coefficient of static frictionGiven, Mass of the bag (m) = 6.80 kg, Force applied (F) = 24.0 N, Initial velocity (u) = 0 m/s, Final velocity (v) = 1.12 m/s, Distance covered (s) = 5.25 m, Acceleration (a) = (v2 - u2) / 2s. Substituting the given values, a = (1.12² - 0²) / (2 * 5.25)m/s²a = 0.247m/s². Now, we will use the formula of the coefficient of kinetic friction. μk= (a/g) + μs (1 - a/g)Let's assume the value of μs to be zero.μk= (a/g) + 0 (1 - a/g) = μk= (a/g) + 0 (1 - a/g) = μk = (a/g) = μk = (0.247m/s²) / (9.8m/s²) = μk= 0.0251. Therefore, the coefficient of kinetic friction between the bag and the ground is 0.0251. In order to move the bag, the boy had to overcome friction. From the given values, we calculated the acceleration of the bag, which was found to be 0.247 m/s². Using this acceleration, we can find the coefficient of kinetic friction, which came out to be 0.0251. This value represents the ratio of the frictional force to the normal force acting between the bag and the ground.For more questions on kinetic friction
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Which part of this chemical process requires energy? KOH + HBr - KBr + H20 A. Forming bonds in KOH and HBr B. Breaking bonds in KBr and H2O C. Breaking bonds in KOH and HBr D. Forming bonds in KBr and H2O
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The chemical process which requires energy is breaking bond in KOH and HBr. Hence, option C is correct.
What is energy?The capacity to perform work is known as energy in physics. Potential, kinematic, thermodynamic, electromagnetic, chemical, nuclear, and other types are all possible.
As energy is transferred through one body to another, there is also heat and work. As a result, heat transfer may result in thermal energy, whereas labor done may result in mechanical power.
As per the given reaction in the question,
KOH + HBr - KBr + H20
Here, in this reaction the chemical process which requires the energy is at the time of breaking of bonds in KOH and HBr at that time the energy is required.
Therefore, it is concluded that breaking bonds in KOH and HBr i.e., option C is correct.
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What is the formula to calculate the utilization of the second
activity in a push system?
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The formula to calculate the utilization of the second activity in a push system can be determined by dividing the total time spent on the second activity by the total time available.
In a push system, activities or tasks are performed sequentially, and the completion of one activity triggers the start of the next activity. The utilization of activity refers to the proportion of time that the activity is being used or occupied.
To calculate the utilization of the second activity in a push system, we need to determine the total time spent on the second activity and divide it by the total time available. The formula can be expressed as:
Utilization of Second Activity = (Time spent on Second Activity / Total Time Available) * 100
The time spent on the second activity refers to the duration or amount of time required to complete that specific activity. The total time available represents the total duration or available time for the entire process or system.
By using this formula, we can determine the utilization of the second activity, which provides insight into how efficiently the activity is being utilized within the overall system.
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