the force of friction is described by the force of friction is described by the law of friction. the theory of friction. a model of friction. the friction hypothesis.
Answer: coefficient of friction, ratio of the frictional force resisting the motion of two surfaces in contact to the normal force pressing the two surfaces together. It is usually symbolized by the Greek letter mu (μ). Mathematically, μ = F/N, where F is the frictional force and N is the normal force.
Explanation:
Urgent need help 100 points
Suppose that scientists observe violent gas eruptions on a planet with an acceleration due to gravity of 3.6 m/s2.
The jets throw sand and dust about 75 m
above the surface.
What is the speed i
of the material just as it leaves the surface?
Scientists estimate that the jets originate as high‑pressure gas speeds through vents just below ground at about 150 km/h.
How much energy per kilogram of material does the jet lose to nonconservative forces as the high‑speed matter forces its way to the surface and into the air?
Answer: The velocity with which the sand throw is 24.2 m/s.
Explanation:
Explanation:
acceleration due to gravity, a = 3.9 m/s2
height, h = 75 m
final velocity, v = 0
Let the initial velocity at the time of throw is u.
Use third equation of motion
The velocity with which the sand throw is 24.2 m/s.
If a firefighter dropped a person onto the safety net, and right
before the person hit the net they had a velocity of 12 m/s and
1800 J of kinetic energy, then what was the mass of the
person?
The kinetic energy of an object is half of the product of mass and square of velocity. Then, for a person with a kinetic energy of 1800 J and velocity of 12 m/s is 25 kg.
What is kinetic energy ?Kinetic energy of an object is generated by virtue of its motion. It is related to the mass and velocity by the expression as follows:
Ke = 1/2 m v².
Thus, as the mass or velocity increases, kinetic energy increases.
Given velocity of the person = 12 m/s
kinetic energy = 1800 J
1/2 m v² = 1800 J
The mass of the person can be then calculated as follows:
m = 2 Ke/v²
m = 1800 J × 2 / (12 m/s)²
m = 25 Kg.
Therefore, the mass of the person is 25 Kg.
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the volume of a gas is proportional to the temperature of a gas is known as
Charles's law means that the volume of a gas is directly proportional to its absolute temperature
Simple Gas Laws - Boyle's Law, Charles' LawBoyle's Law tells us that the volume of a gas increases as the pressure decreases. Charles's law tells us that the volume of a gas increases with increasing temperature
This is stated by Karl's law, also known as the law of volumes
For a dry gas sample, its volume and Kelvin temperature are directly proportional if the pressure is kept constant
Mathematical representation -
\(\begin{equation*} PV=nRT \end{equation*}\) P : is a Pressure(Pa)
\(\begin{equation*} V=\frac{nRT}{P} \end{equation*}\) V : is volume (\(m^{3}\))
T : absolute temperature (K)
R : gas constant \(\begin{equation*} 8.314K^{-1}.mol^{-1} \end{equation*}\)
n : amount of substance of the gas (mole)
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Purchasing uses information from the _____ to place purchase orders for raw materials with qualified suppliers.
Purchasing uses information from the sales order plan to place purchase orders for raw materials with qualified suppliers.
What is purchasing?The term purchasing has to do with the process of the buying of goods and services. The process of purchasing a very essential part of the business venture such that in some areas, an entire department may be devoted to the coordination of the processes involved in purchasing in the establishment.
A purchasing manager may be given the task of seeing to the coordination of the entirety of all the purchasing activities.
Thus, we could see that purchasing is a chain of activities that is based on the principles of demand and supply.
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A skydiver with a mass of jumps out of a plane. When she reaches terminal or constant velocity, what is the net force on the skydiver
When a skydiver with a mass of jumps out of a plane, the net force acting on the skydiver when she reaches terminal or constant velocity is zero because The terminal velocity of a skydiver is when the air resistance and the weight force of the skydiver becomes equal, thus resulting in zero acceleration.
It is known as terminal velocity because the speed does not increase beyond this point, i.e., it remains constant or terminal.Terminal velocity is defined as the highest velocity attained by an object falling through a fluid. It is observed when the sum of drag force and buoyancy is equal to the downward gravity force acting on the object. The acceleration of the object is zero as the net force acting on the object is zero.
So, when a skydiver with a mass of jumps out of a plane, the net force acting on the skydiver when she reaches terminal or constant velocity is zero.
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A car can go from 0 m/s to 38 m/s in 4.5 seconds. If a net force of 6570 N acted on
the car, what is its mass
The Mass of the car = 782.1 Kg
What is the mass of the car?The mass of the car is calculated as follows:
Mass = Force/ accelerationThe force on the car = 6570 N
The acceleration of the car, a = 38 - 0/4.5
acceleration = 8.44 m/s²
Mass of the car = 6570/8.44
Mass of the car = 782.1 Kg
In conclusion, the mass of the car is obtained from the acceleration and force on the car.
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A mechanic uses a hydraulic car jack to lift the front end of a car to change the oil. The jack used exerts 8000 N of force from the larger piston. To pump the jack, 4000 N of force is exerted on the small piston, which has an area of 2 m2 . What is the area of the large piston?
Answer:
Hope the picture will help you
Information about mars' moons.
Answer:
mars is a fourth planet of the sun and the second planet in the solar system
moon is a natural satellite of the earth it isthe fifth largest moon in the solar system
as a huge rotating cloud of particles in space gravitate together forming an increasingly dense ball, it shrinks in size and
In space, a massive revolving cloud of particles gravitates towards one another and condenses into a ball. The cloud is rotating more quickly as becomes smaller. According to the conservation of angular momentum.
Do planks help with fat loss?A plank can help you burn fat quickly in part because it can work several muscles at once. It seems sense that it would help your body's core strength and increase your metabolism to help you lose weight. Overall, a posture is a great exercise to engage the entire body.
Do planks help build abs?Your abs will get stronger through both planks and crunches, however planks target more muscles, include your abs, whereas crunches solely work your abs. You can perform a minute's worth abdominal crunches or maintain a plank for 30 to 60 seconds; both brief exercises will have an effect.
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The charge of the electron is -1.602x10-19 C. The charge of the proton is the same except positive. An electron and proton are separated by a distance. What is the distance, r; such that the electric force between them is 1.000 N? X l0l ?] m Hint: Ke = 8.99x109 N-m?/C2. Coefficient (green) Exponent (yellow) Enter
An electron and proton are separated by a distance, and the distance is: 1.517 × 10⁻¹⁴ m.
What is the charge of electron?Positively charged particles include electrons. The magnitude of the negative charge is 1.602 x 10⁻¹⁹ C.
The electron, the lightest known stable subatomic particle, is regarded as the fundamental representation of electric charge.
Given that,
Charge of the electron is 1.602 x 10⁻¹⁹ C
electric force between them is 1.000 N
Electrostatic force between electron and proton:
F = [K × q(p) × q(e)] / r²
or, r² = [K × q(p) × q(e)] / F
or, r² = (8.99 × 10⁹ N.m²/C²) × (1.602 × 10⁻¹⁹ C)²
or, r = 1.517 × 10⁻¹⁴ m
here. co-efficient = 1.517 and exponent = -14
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Which statement describes how electrical power is calculated?
Answer:
D. Power is the product of voltage and current.
Explanation:
Electrical power is derived from the product of current and voltage;
Power = current x voltage = I V
I is the current
V is the voltage
R is the resistance
Now;
V = IR;
So;
Power = I x (IR) = I²R
Also,
Power = \(\frac{V^{2} }{R}\)
The right choice is D
a 977-kg satellite orbits the earth at a constant altitude of 110-km. (a) how much energy must be added to the system to move the satellite into a circular orbit with altitude 199 km? mj
The energy required to move the satellite into a circular orbit with an altitude of 199 km is 3.45 x 10^8 J.
The energy required to move the satellite into a circular orbit with an altitude of 199 km can be calculated by using the following equation:
ΔE = GMm[(2/r1) - (1/r2)]
Where ΔE is the change in energy, G is the gravitational constant, M is the mass of the Earth, m is the mass of the satellite, r1 is the initial distance of the satellite from the center of the Earth, and r2 is the final distance of the satellite from the center of the Earth.
First, we need to convert the altitude into the distance from the center of the Earth:
r1 = 6,711 km + 110 km = 6,821 km
r2 = 6,711 km + 199 km = 6,910 km
Plugging in the values, we get:
ΔE = (6.67 x 10^-11 Nm^2/kg^2) x (5.97 x 10^24 kg) x (977 kg) x [(2/6,821,000 m) - (1/6,910,000 m)]
ΔE = 3.45 x 10^8 J
Therefore, the energy required to move the satellite into a circular orbit with an altitude of 199 km is 3.45 x 10^8 J.
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A pinball bangs against a bumper giving the ball a speed of 42cm/s if the ball has a mass of 50.0g what is the ball’s kinetic energy in joules
Explanation:
Given:-mass=50g
velocity=42cm/s
To find:-Kinetic energy
Solution:-As we know that
\({\boxed{\sf kinetic\:energy={\dfrac {1}{2}}mv^2}}\)
Substitute the values\({:}\longrightarrow\)\(\sf k.v={\dfrac {1}{{\cancel{2}}}}\times 50\times {\cancel{42}}^2 \)
\({:}\longrightarrow\)\(\sf k.v=50\times 21^2 \)
\({:}\longrightarrow\)\(\sf k.v=50×441 \)
\({:}\longrightarrow\)\(\sf k.v=22050MJ \)
1Joule=1000milijoules22050MJ=\({\dfrac {22050}{1000}}=22.05J\)=22J(Approximately)\(\therefore\)\({\underline{\boxed{\bf Kinetic\:energy=22Joule}}}\)
if a person is 6.25 m away from a 60.0 w speaker, what is the sound level they are hearing?
(treat the speaker as a point source.)
Answer:
111dB
Explanation:
First, find the intensity of the sound using the formula I = Power / 4 x pi x radius ^2
So
60.0 / (4 x 3.14 (6.25)^2)
= 0.122
Then plug that into the equation to find sound level, which is 10log( I / Io)
Io being (1 x 10^-12)
So
10log(0.122 / 1 x 10^-12)
= 111dB
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Two waves with the same wavelength interact. One has an amplitude of +0.42 m and the
other wave has an amplitude of -0.18 m. When the two waves exactly overlap, what is the
resultant amplitude?
The resultant amplitude of the waves when the two waves overlap is +0.24 m.
What is amplitude of a wave?
The amplitude of a wave is the maximum vertical displacement of the wave or the highest upward displacement of a wave.
The resultant amplitude of the waves when the two waves overlap is calculated as follows;
resultant amplitude = amplitude of the first wave + amplitude of the second wave
resultant amplitude = 0.42 m - 0.18 m
resultant amplitude = 0.24 m
The resultant amplitude of the waves when the two waves overlap depends on the initial amplitude of each wave as shown above.
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How will i promote the culture of my country in a creative way ?
pls answer po in a civics way
Promoting the culture of your country in a creative way requires a combination of civic engagement and creative expression. Here are some civic-minded approaches you can consider:
Cultural Events and Festivals: Organize or participate in cultural events and festivals that showcase the traditions, music, dance, food, and arts of your country. These events can bring people together, foster cultural exchange, and create a sense of pride in your country's heritage.
Cultural Education: Collaborate with schools, community centers, and local organizations to develop cultural education programs. These programs can include workshops, lectures, or classes that teach traditional crafts, languages, history, or other aspects of your country's culture.
Cultural Preservation: Engage in efforts to preserve and protect cultural landmarks, historical sites, and artifacts. This can involve volunteering for restoration projects, advocating for heritage preservation laws, or raising awareness about the importance of cultural heritage.
Cultural Exchange Programs: Initiate or participate in cultural exchange programs that allow people from different countries to share experiences and learn about each other's cultures. This can be done through student exchanges, artist collaborations, or cultural immersion programs.
Online Presence: Utilize social media platforms, blogs, or websites to share stories, photos, and videos that highlight the cultural richness of your country. This can reach a wider audience and create opportunities for cross-cultural dialogue.
Collaborations with Artists: Support and collaborate with local artists, musicians, filmmakers, and writers who can contribute to promoting your country's culture through their creative works. This can include organizing exhibitions, concerts, film screenings, or publishing cultural literature.
Cultural Tourism: Work with local tourism authorities to develop cultural tourism initiatives that showcase the unique aspects of your country's culture. This can involve creating cultural tours, promoting traditional accommodations, or organizing cultural exchange programs for tourists.
Remember, promoting your country's culture in a creative way requires a sense of civic responsibility, respect for diversity, and a commitment to preserving and celebrating your heritage. By engaging the community and utilizing creative platforms, you can inspire others to appreciate and embrace the culture of your country.
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fill in the blank. the ____ standard uses mimo technology to boost performance.
The 802.11n standard uses MIMO technology to boost performance. Option C is the correct answer.
The wireless system called multiple-input multiple-output (MIMO) employs several receivers and transmitters in order to broadcast more data simultaneously. In comparison to goods lacking 802.11n, the technology enables 802.11n to operate at faster rates. Option C is the correct answer.
Multipath is a common radio-wave phenomena that is used by MIMO technology. With multipath, the information being sent bounces off of surfaces like walls, ceilings, and other objects, arriving at the receiving antenna numerous times at slightly varied angles and intervals. Multipath formerly resulted in interference and delayed wireless communications down. In order to increase performance and range, multipath MIMO technology employs many, intelligent transmitters and receivers with an additional spatial dimension.
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The complete question is, "The _____ standard uses multiple input/multiple output (MIMO) technology to boost performance.
a. 802.11a
b. 802.11b
c. 802.11n
d. 802.11c"
The standard that uses MIMO technology to boost performance is the IEEE 802.11n standard, also known as Wi-Fi 4.
The blank in the statement refers to a wireless communication standard that utilizes MIMO technology to enhance performance. MIMO stands for Multiple-Input Multiple-Output, which involves using multiple antennas at both the transmitting and receiving ends of a wireless connection. This technology allows for the creation of multiple spatial streams, resulting in increased data transmission rates and improved signal quality.
One of the standards that incorporates MIMO technology is the IEEE 802.11n standard, also known as Wi-Fi 4. This standard is widely used for wireless networking and offers significant improvements over previous Wi-Fi standards. By utilizing MIMO technology, the IEEE 802.11n standard provides higher data rates, improved coverage, and enhanced overall performance.
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43.5 kg. Shawn rides his bike 1.3 km in
10.4 min at a constant velocity.
The acceleration of gravity is 9.8 m/s^2.
What is Shawn’s kinetic energy?
Answer in units of J.
Answer:
K.E is 90.625 J
Explanation:
Data:
Mass = m = 43.5kg
Distance = d = 1.3km = 1300 m
Time = t = 10.4 min = 624 sec
Accelaration = a or g = 9.8
Formula for kinrtic energy
K.E = 1/2mv²
Find velocity
V = d/t = 1300/624 = 2.0833333333333 m/s
Put values in formula
K.E = 1/2 (43.5)(2.084)² = 90.624999999995
Mark brainliest if you understand it
why does mars jupiter and earth not have the same gravitational force on a 150kg object
According to the Newton's law of universal gravitation 2.4, the force between any more than two or three types of heavier mass which really involves with mass falling to the ground is proved by the distance, the mass's rotational speed and the rotating direction. It happens the changes in space and time, and also in the diameter of it's own mass.
Determine the magnitude and direction of the force between two parallel wires 30 m long and 6.0 cm apart, each carrying 30A in the same direction. Determine the magnitude of the force between two parallel wires.
The magnitude of the force between two parallel wires 30 m long and 6.0 cm apart, each carrying 30A in the same direction is 0.03 N. The magnitude of the force between two parallel wires can be calculated using the formula:
F = (μ₀ * I₁ * I₂ * L) / (2πd)
where F is the magnitude of the force, μ₀ is the permeability constant (4π x 10 N/A), I₁ and I₂ are the currents flowing through the wires, L is the length of the wires, and d is the distance between the wires.
Substituting the given values, we get:
F = (4π x 10 N/A * 30A * 30A * 30m) / (2π * 0.06m)
F = 0.03 N
The direction of the force can be determined using the right-hand rule. If we point the thumb of our right hand in the direction of the current in one wire and the fingers in the direction of the current in the other wire, the direction of the force on the wires is given by the direction of the palm.
In this case, since the currents are flowing in the same direction, the force between the wires is attractive, pulling the wires towards each other. Therefore, the magnitude of the force between two parallel wires 30 m long and 6.0 cm apart, each carrying 30A in the same direction is 0.03 N and the direction of the force is attractive, pulling the wires towards each other.
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John owns a used 2003 mustang Mach 1, he spots a news crew with a bunch of people what should he do? A) Rev his engine at the highest RPM B) Do a burnout C) Drive near the Crowd and drop a gear and hurl into the crowd D) ALL OF THE ABOVE
Each of the three choices is tasteless, exhibitionist, juvenile, and dangerous. John should do none of them.
Encountering a news crew, there's no reason for John to call attention to himself in a childish way, or interfere with their work in any way.
What he should do is:
==> Slow down
==> Pass the scene cautiously
==> Resume his normal, legal speed quietly, in case the crew happens to be recording audio at the moment.
Mysteriously, this course of action is nowhere to be found among the choices listed.
Answer:
all three options :)
Explanation:
cuz merica
What would african americans do once they could vote?
African Americans would have the power to elect representatives who would fight for their rights and interests. They would be able to participate in local, state, and national politics, bringing their unique perspectives and concerns to the table.
African Americans would also have a greater say in issues affecting their communities, such as education, healthcare, and criminal justice reform. With the ability to vote, African Americans would gain a stronger voice and greater influence in shaping the policies and laws that govern their lives. However, the right to vote alone does not guarantee equality or justice, and there would still be significant challenges and obstacles to overcome in the fight for racial equality. It would take ongoing activism and advocacy to ensure that the voting rights of African Americans are protected and that their voices are heard.
African Americans also participated in political campaigns and formed political organizations to raise awareness about issues affecting their communities. By engaging in the democratic process, they worked to dismantle systemic racism and contribute to a more inclusive society. Their increased involvement in politics helped to advance the civil rights movement and shape the political landscape of the United States.
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What is the numeric value of the prefix "micro"?
a. 0.00001
b. 0.000001
c. 0.0001
d. 0.001
What is the numeric value of the prefix "micro"?
a. 0.00001
b. 0.000001 ✓"Micro" is a prefix that is used to indicate a value of the factor 10^-6 and means very minute.c. 0.0001
d. 0.001
HELP PLEASE : )
IT'S SCIENCE
Answer:
1. A and C are balanced forces as all the forces get cancelled by the opposite and equal force.
2. B and D as in B the Net force is 5N to the right and in D the Net force is 20N to the right.
3. This would be all the unbalance forces which are B and D
4. B would be moving 5N to the right and D would move 20N to the right.
can someone pls help me create a lab trying to prove steam is hotter than boiling water.
Answer:
More energy
Explanation:
Steam is hotter than boiling water because it contains more energy
If 1.39 amps of current runs for 786 seconds, then how many total coulombs were delivered?
A total of 1092.54 coulombs of electric charge were delivered.
What is an elctric charge?Charged material experiences a force when it is exposed to an electromagnetic field due to the physical property of electric charge. You can have a positive or negative electric charge (commonly carried by protons and electrons respectively). Unlike charges attract one another while like charges repel one another. Neutral refers to an object that carries no net charge. Classical electrodynamics, the name given to the early understanding of how charged particles interact, is still accurate for issues that do not call for taking into account quantum phenomena. Electric charge is a conserved attribute, meaning that the net charge—that is, the sum of the positive and negative charges in an isolated system—cannot change. Subatomic particles carry an electric charge.
Q = c × t
Q is the quantity of electricity in coulombs.
C is the strength of the current in ampere,
T is the time in seconds.
Q = 1.39 × 786 = 1092.54 coulombs.
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A gymnast jumps upward with an initial speed of 10 m/s. She is in the air for a total time of
A. 1 second
B. 5 seconds
C. 2 seconds
D. 10 seconds
A gymnast, who jumps upward with an initial speed of 10 m/s, is in the air for a total time of C. 2 seconds.
Consider the factors affecting the gymnast's motion, which are initial speed, gravity, and time. When the gymnast jumps, she experiences Earth's gravity, which causes a downward acceleration of approximately 9.8 m/s². We can use the formula t = (2*v₀) / g to find the total time in the air, where t is the total time, v₀ is the initial speed, and g is the acceleration due to gravity.
Plugging in the given values, we get t = (2*10 m/s) / 9.8 m/s² ≈ 2.04 seconds. Since the available choices are in whole numbers, we can round this value to the nearest second, which is 2 seconds. So, the gymnast is in the air for a total time of 2 seconds (C).
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Design an experiment to separate the components of a mixture of two solids - Sodium chloride and Sucrose. Both compounds are soluble in water, but Sucrose is much more soluble in an organic solvent (Dichloromethane) than water. Sodium chloride does not dissolve in dichloromethane.
By utilizing a funnel filter made of Sodium chloride salt as a filtration method. The organic solvent will be evaporated using the rotary evaporation method, leaving the sucrose behind.
Where is HCl found in the body?All plants naturally generate sugar, the well-known and adored simple carbohydrate, also called by its chemical formula, sucrose. This includes fruits, veggies, and even nuts. Plants including berries, vegetables, and nuts naturally contain sugars like glucose in various amounts. Sucrose is also commercially generated from sugar cane and beets.
What is HCl used for in everyday life?According to a research, ingesting "natural" sugar might be just as bad for your health as consuming high- fructose corn syrup. Sucrose, a carbohydrate, provides the energy your body needs to perform both mental and physical work. Your body converts foods like starch and sucrose into glucose and fructose during digestion. Your body breaks down food to provide your cells energy. Reduce the fructose and glucose down.
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Please Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
An electron is in motion at 4.0 × 10^6 m/s horizontally when it enters a region of space between two parallel plates, as shown, starting at the negative plate. The electron deflects downwards and strikes the bottom plate. The magnitude of the electric field between the plates is 4.0 x 10^2 N/C and separation between the charged plates is 2.0 cm.
Determine the horizontal distance travelled by the electron when it hits the plate.
Answer:
Given that
speed u=4*10^6 m/s
electric field E=4*10^3 N/c
distance b/w the plates d=2 cm
basing on the concept of the electrostatices
now we find the acceleration b/w the plates to find the horizontal distance traveled by the electron when it hits the plate.
acceleration a=qE/m=\(1.6*10^{-19}*4*10^3/9.1*10^{-31} =0.7*10^{15}\)=\(7*10^{14}\) m/s
now we find the horizontal distance traveled by electrons hit the plates
horizontal distance
\(X=u[2y/a]^{1/2}\)
=\(4*10^6[2*2*10^{-2}/7*10^{14}]^{1/2}\)
=\(3*10^{-2}\)= 3 cm