Answer:
At most temperatures, silver has lowest resistivity.
However, superconductors have zero resistivity, which is the lowest. Superconductors are real, they are primarily used in very powerful magnets (such as in CERN). Known superconductors require VERY low temperatures which require expensive technology.
There is ongoing research to find compounds that exhibit room temperature superconductivity. If (when?) one or more is found, major changes to electricity as we know it will result. Not only will we be able to make very powerful magnets (for use in very powerful motors, generators, etc.), but the power companies will be able to move electricity from the generator to the user without loss. Today typical power transmission losses are between 8% and 15%. There may also be important benefits to computer and processing capabilities.
Hope this helps! :D
Where do you enjoy eating Mexican food the most? and "Do you always order salsa when you eat at a Mexican restaurant?" This survey may yield biased results due to:
Mexican food has become popular worldwide because of its unique flavors and deliciousness. When eating Mexican food, people have different preferences on where to eat, and some prefer to order a salsa.
A survey on people's favorite Mexican restaurant and their preference for ordering salsa may yield biased results due to various reasons. Biased results are those that are not accurate and do not reflect the actual views of the respondents. Therefore, some of the reasons that may cause the survey to yield biased results are as follows: Sampling errors: A survey may be biased if the sampling of participants is not done well. A biased sampling may involve picking people who have similar views, leading to false results. Questionnaire: If the survey questionnaire contains questions that are subjective and not well understood by the participants, then the answers given may be biased. The questions should be specific and clear.Respondents: The results may be biased if the people who participate in the survey have a specific mindset. For instance, if a group of people who are vegetarian participate in the survey, their answers may be biased towards vegetarian foods.Misinterpretation of answers: Survey results may be biased if the surveyor misinterprets the answers given by the participants or if the participants give ambiguous answers.In conclusion, the survey on people's favorite Mexican restaurant and their preference for ordering salsa may yield biased results. The surveyors need to be careful when selecting the participants, preparing the questionnaire, interpreting the results, and analyzing the data.
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Fill in the table below with the properties of acids and bases.
Draw lines between the properties that are the same.
Answer:
1) Acids have a sour taste , Bases have a bitter taste.
2) Acids turn blue litmus paper into red , Bases turn red litmus paper into blue.
3) Acids react with most metals to form Hydrogen gas but only a few base react with a few metals to form Hydrogen gas
4) Both will conduct electricity. Both acids & bases are good electrolytes. Strong acids & bases conduct more electricity than that of weak acids & bases
Fill in the blanks with the properties of acids and bases as follows:
Taste: Acids generally have a sour taste while bases possess a bitter taste.Color change of litmus paper: Acids significantly transform the blue litmus paper into red while bases turn red litmus paper into blue.Reaction with metals to produce hydrogen gas: All acids react with metals in order to produce hydrogen gas while only some bases have this property. Electrical conductivity: Both acids and bases in an aqueous solution considerably conduct electricity. What are the properties of acids?The properties of acids are as follows:
Acids typically react with bases in order to produce salt and water.Acids react with metals to synthesize hydrogen gas.Acids transform the color of certain acid-base indicators.Acids generally have a sour taste. They are good conductors of electricity in an aqueous solution.Therefore, fill in the blanks with the properties of acids and bases are well described above.
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What is the input distance for a claw hammer if the output distance is 2.0 cm and the mechanical advantage is 5.5?
Answer:
0.36cm
Explanation:
Given parameters:
Output distance = 2.0cm
M.A = 5.5
Unknown:
Input distance = ?
Solution:
The mechanical advantage is the value of the force multiplier.
M.A = Output distance / Input distance
Input distance = Output distance / mechanical advantage
Input distance = \(\frac{2.0cm}{5.5}\) = 0.36cm
1.4 mol of a monatomic ideal gas are at a temperature of 300 K and a pressure of 1.0 atm.What is the entropy change in a process that brings the gas to 550 K and 1.3 atm?Express your answer with the appropriate units
1.4 mol of a monatomic ideal gas are at a temperature of 300 K and a pressure of 1.0 atm the entropy change in a process that brings the gas to 550 K and 1.3 atm is 17.22 J/K.
To calculate the entropy change, we can use the equation:
ΔS = nCv ln(T2/T1) + nR ln(V2/V1),
where ΔS is the entropy change, n is the number of moles of the gas, Cv is the molar heat capacity at constant volume, T1 and T2 are the initial and final temperatures, V1 and V2 are the initial and final volumes, and R is the ideal gas constant.
In this case, the gas is monatomic, so the molar heat capacity at constant volume (Cv) is (3/2)R.
Given:
n = 1.4 mol,
T1 = 300 K,
T2 = 550 K,
P1 = 1.0 atm,
P2 = 1.3 atm.
Since the process is not specified, we assume that the volume remains constant (V1 = V2).
Plugging in the values, we have:
ΔS = (1.4 mol) * ((3/2)R) * ln(550 K/300 K) + (1.4 mol) * R * ln(1.3 atm/1.0 atm).
The ideal gas constant (R) is approximately 8.314 J/(mol·K).
Calculating this expression gives us:
ΔS = (1.4 mol) * ((3/2)(8.314 J/(mol·K))) * ln(550/300) + (1.4 mol) * (8.314 J/(mol·K)) * ln(1.3/1.0).
Simplifying this equation gives us the entropy change, which is approximately:
ΔS ≈ 17.22 J/K.
Therefore, the entropy change in the process is approximately 17.22 J/K.
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I need a list of all of these please, not the names, but the accronyms
Answer:
N
O
O
B
Explanation:
D- Dont
G- Get
P- people
T- to
D- do
W- work
F- for
Y-You
What is the difference between mass and weight is the mass of an object on Earth the same as the mass of the same object on Jupiter?
Mass is constant independent of location or gravity. On Mars or Jupiter, you would have the same mass as you have on Earth. Gravity causes your weight to differ on other worlds.
What is mass?MASS: The entire amount of matter contained in a thing is referred to as its mass. The inertia of an item may be used to calculate its mass. The mass of an item is constant in all locations. It remains unchanged even when the value of 'g' equals 0.
What is weight?WEIGHT: The gravitational force by which the earth draws an item is referred to as weight. We may calculate weight using the formula W=m(mass)*g (acceleration due to gravity). It varies depending on where you go (variable). If the value of g is zero everywhere, the object's weight becomes zero.
Here,
The object's mass is constant. As a result, the mass would be the same on Earth and Mars. However, when it comes to weight, it will undoubtedly differ. Weight is determined by the value of g, and the values will differ in both locations.
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(b) Does the inductance of a coil depend on the current in the coil?
Yes, the inductance of a coil does depend on the current in the coil. Inductance is a property of a coil that measures its ability to store energy in a magnetic field.
An electrical conductor's inductance is its propensity to resist changes in the electric current it is carrying. The inductance is represented by the letter L, and the SI unit for inductance is the Henry.
It is directly proportional to the current flowing through the coil. When the current increases, the magnetic field produced by the coil also increases, resulting in a higher inductance. Conversely, when the current decreases, the inductance decreases as well.
So, the inductance of a coil is influenced by the current flowing through it.
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what will happen if the positive and negative connections on the voltmeter are reversed?
If the gravity of the moon is 1/6 of Earth’s gravity, what is the mass of an object that has a weight of 115N on the moon? a)89 b)71.9 c)30.2 d)20
it's 115/6 which is 19.1667
Explanation:
The weight would be 115/6 because the moon has one sixth of the gravity on earth so the weight would be on sixth of that on earth.
A thin, light wire is wrapped around the rim of a wheel. The wheel rotates about a stationary horizontal axle that passes through the center of the wheel. The wheel has radius 0. 190 m and moment of inertia for rotation about the axle of 0. 470 kg⋅m2. A small block with mass 0. 350 kg is suspended from the free end of the wire. When the system is released from rest, the block descends with constant acceleration. The bearings in the wheel at the axle are rusty, so friction there does -8. 50 J of work as the block descends 3. 80 m. What is the magnitude of the angular velocity of the wheel after the block has descended 3. 80 m?
The magnitude of the angular velocity of the wheel after the block has descended 3.80 m is 5.23 rad/s.
Explanation :
We can use conservation of energy to solve this problem. Initially, the system is at rest and has a total energy of zero. As the block descends, its potential energy is converted into kinetic energy and work done by friction. We can express this as:
\(mgh = (1/2)mv^2 + W_{friction} + (1/2)Iw^2\)
where m is the mass of the block, g is the acceleration due to gravity, h is the height the block descends (3.80 m), v is the velocity of the block at the bottom, W_friction is the work done by friction (−8.50 J), I is the moment of inertia of the wheel, and ω is the angular velocity of the wheel.
Since the wire is wrapped around the rim of the wheel, the distance the block descends (3.80 m) is also the distance the rim of the wheel moves. Therefore, the work done by friction can be expressed as:
\(W_{friction} = -F_{friction} * d = -\)τΘ
where F_friction is the force of friction at the axle, τ is the torque exerted by friction, d is the distance the rim moves, and θ is the angle through which the wheel rotates. Since the wheel rotates through an angle of θ = h/r = 3.80 m/0.190 m = 20.0 rad, we have:
τ = W_friction / θ = -8.50 J / 20.0 rad = -0.425 N*m
Substituting the given values into the energy conservation equation and solving for ω, we get:
\((0.350 kg)(9.81 m/s^2)(3.80 m) = (1/2)(0.350 kg)v^2 - 0.425 N*m + (1/2)(0.470 kgm^2)w^2\)
Simplifying and solving for ω, we get:
ω = √[(2mgh + 2τ)/I]
\(w =\sqrt{[(2)(0.350 kg)(9.81 m/s^2)(3.80 m) + 2(-0.425 Nm)] / 0.470 kgm^2}\)
ω = 5.23 rad/s
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Where does compression often occur?
Answer:
a convergent boundary^^
Explanation:
hope it helped
Does the moon control the waves in the ocean?
Answer:
no don't think so
Explanation:
JESUS CHRIST controls everything 100IQ
No, the moon does not directly control the waves in the ocean. The primary factors that influence the formation of waves in the ocean are wind and the interaction between wind and the water's surface.
The moon, however, does play a significant role in influencing the tides, which are the periodic rise and fall of the ocean's surface.
The gravitational force exerted by the moon, as well as the sun to a lesser extent, creates tidal bulges on the Earth. As the Earth rotates, these tidal bulges move around the planet, resulting in the daily cycle of high tides and low tides.
The gravitational pull of the moon is stronger on the side of the Earth facing the moon, causing a high tide, while on the opposite side, a high tide also occurs due to the centrifugal force resulting from the Earth's rotation. The areas in between experience low tides.
While tides can affect the height and intensity of ocean waves near the coastlines, the actual formation and behavior of waves are primarily driven by wind patterns, water depth, and other factors such as underwater topography.
Waves are generated when the wind transfers its energy to the water's surface, creating oscillations that propagate as waves. These waves can travel vast distances across the ocean, even in the absence of tidal influences.
In conclusion, while the moon's gravitational pull influences the tides, it does not directly control or generate the waves in the ocean.
Waves are primarily driven by wind and other factors, whereas tides are the result of gravitational forces acting on the Earth's oceans.
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Imagine you inherit a farm and now have to purchase fertilizer for the farm. The farm is 340 acres and had corn planted the previous year. You must add fertilizer to the soil before you plant this year's crop. You go to the local fertilizer store and find SuperPhosphate-brand fertilizer. You read the fertilizer bag and can recognize from your high school chemistry class a molecular formula C*a_{3}*P_{2}*H_{14}*S_{2}*O_{21} (you don't understand anything else written on the bag because it is imported fertilizer from Japan). You must decide how much fertilizer to buy for application to your cornfields. If each bag contains 25 kg of fertilizer and costs $54.73, how many bags of fertilizer must you purchase, and how much will it cost you to add the necessary fertilizer to your fields ?
Total Cost is = $107,380 if The farm is 340 acres and had corn planted add fertilizer to the soil before you plant this years' crop.
What is called fertilizer?A fertiliser is a natural or artificial substance containing chemical elements (such as Nitrogen (N), Phosphorus (P) and Potassium (K)) that improve growth and productiveness of plants. Some synonyms include the terms "enrichment" or "plant nutrient".
Why is fertilizer important?Without fertilizers, nature struggles to replenish the nutrients in the soil. When crops are harvested, important nutrients are removed from the soil, because they follow the crop and end up at the dinner table. If the soil is not replenished with nutrients through fertilizing, crop yields will deteriorate over time.
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A rocket is launched straight up from the earth's surface at a speed of 15000 m/s. what is its speed when it is very far away from the earth?
When a rocket is launched straight up from the Earth's surface, its speed gradually decreases as it moves away from the planet.
However, it never truly reaches a constant speed when it is very far away from the Earth. Instead, its speed continues to decrease due to the gravitational pull of other celestial bodies in space, such as the Sun and other planets. Therefore, it is not possible to determine the rocket's exact speed when it is very far away from the Earth without additional information about the rocket's trajectory, the effects of other gravitational forces, and the time elapsed since the launch. The exact speed when the rocket is very far away would depend on various factors, including the rocket's design, propulsion system, and the duration of its engine burn.
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Which of the following is a property of a transverse wave?
A. It needs a medium to travel.
B. It travels up and down.
C. They are visible to the nake eye.
D. It travels by compressing particles.
The correct answer is option B. It travels up and down. Transverse waves are characterized by the fact that they cause particles in the medium to move perpendicular to the direction of wave propagation.
What are transverse waves?Transverse waves are a type of wave that causes the particles of the medium to move up and down or side to side as the wave passes through them.
The other options are not right because:
Option A: It describes a property of a longitudinal wave, not a transverse wave. Longitudinal waves do need a medium to travel, whereas transverse waves can travel through a vacuum, such as light waves.Option C: It is not necessarily true that transverse waves are visible to the unaided eye. Some transverse waves, such as light waves, are visible, but others, such as radio waves, are not.Option D: It describes a property of a longitudinal wave, not a transverse wave. Longitudinal waves travel by compressing particles, whereas transverse waves travel by perpendicular vibrations.Learn more about transverse waves here:
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que tienen en común la materia y el sistema?
Answer:
La materia es la sustancia de la que está hecho todo material. En física, el sistema es una de las propiedades de la materia. Se puede transferir entre objetos y convertir en forma. No se puede crear ni destruir.
espero que te ayude!
Which of these statements about electromagnetic waves is incorrect?
Answer:
The statement that "electromagnetic waves require a medium to travel through" is incorrect. Electromagnetic waves do not require a medium to travel through and can propagate through a vacuum. This was one of the key insights of James Clerk Maxwell's theory of electromagnetism.
Can someone help me solve number 3 for chemical equations?
Answer:
I'm pretty sure it should be 4KClO3-->3KClO4+1KCl
Explanation:
4. Un móvil lleva una velocidad de 75 m/s, en dicho momento aplica los frenos durante tiempo de 15 segundos hasta detenerse. ¿cuál será la aceleración del frenado? ¿cuál es la distancia que recorre hasta detenerse?
Answer:
a = 5 m / s² and x = 562.5 m
Explanation:
Let's apply the kinematics relations
v = v₀ + at
v² = v₀² + 2a x
In this case, as the car stops, its final speed is zero (v = 0) and the acceleration must be opposite to the speed, that is, negative
0 = v₀ - a t
a = v₀ / t
let's calculate
a = 75/15
a = 5 m / s²
let's look for the distance
0 = v₀² - 2a x
x = v₀² / 2a
let's calculate
x = \(\frac{75^2}{2 \ 5 }\)
x = 562.5 m
What is the momentum of a 9,800 kg bus travelling at 40 mph in ? (kg*m/s)
Given data,
Mass of the bus is m = 9800 kg,
Speed of the bus is v = 40 mph,
Converting speed of the bus in m/s, {1 miles per hour = 0.447 meter per second}
v = 40*0.447
v = 17.88
Calculating momentum of the bus,
\(\begin{gathered} P=\text{ mv} \\ P=\text{ 9800}\times17.88 \\ P=\text{ 175,224 kg.m/s} \end{gathered}\)Part GNow, using the results of Part F, find the total kinetic energy K of the system. Remember that both particles rotate about the y axis.
Express your answer in terms of m, ω, and r.
Answer:
K = (11*m*(ω*r)^2)/2
Explanation:
Not surprisingly, the formulas K = (1/2)*I*ω^2 and K = (1/2)*m*v^2 give the same result. They should, of course, since the rotational kinetic energy of a system of particles is simply the sum of the kinetic energies of the individual particles making up the system.
consider three point charges, a, b, and c, arranged in an equilateral triangle, with distance d on each side. how would we find the total electric potential energy of this arrangement?
The total electric potential energy of three point arranged in an equilateral triangle is U = k/d [qAqB + qC (qA+qB)]
From the case, we know that:
qA
qB
qC
dAB = dBC = dCA = d
U?
Electric potential energy is a potential energy needed to move a charge against an electric field. Electric potential energy can be calculated using formula:
U12 = k x (q1 x q2)/r
Total electric potential energy is the total of all electric potential energy of each charges pair.
We will calculate each pair's electric potential energy first then find the total electric potential energy.
U AB = k (qA x qB)/d
U BC = k (qB x qC)/d
U CA = k (qC x qA)/d
U = U AB + U BC + U CA
U = k (qA x qB)/d + k (qB x qC)/d + k (qC x qA)/d
U = k/d (qAqB + qBqC + qCqA)
U = k/d [qAqB + qC (qA+qB)]
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Please I need help with this question:
Beatrice has to put two pieces together. Unfortunately, the diameter of the cylinder is 0.5mm bigger than the diameter of the hole. What can Beatrice do to make the cylinder go into the key
What Beatrice must do to make the cylinder go into the key is apply heat on the cylinder and reduce the size.
What Beatrice must do to make the cylinder go into the key?
To enable the cylinder go into the hole, Beatrice must apply heat to reshape the cylinder.
When heat is applied to the cylinder, the temperature of the cylinder will increase, a continuous application of heat will enable the cylinder to melt. The melted cylinder will be easier to reshape and reduce the size to match the hole.
Thus, what Beatrice must do to make the cylinder go into the key is apply heat on the cylinder and reduce the size.
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What is 8 degrees Celsius in Fahrenheit?
8 degrees Celsius is equal to 46.4 degrees Fahrenheit when converting temperatures from degrees Celsius to Fahrenheit.
Is a refrigerator safe at 8 degrees Celsius?Between 32 degrees Centigrade and 41 degrees Fahrenheit, or 0 degrees Celcius with 5 degrees Celcius, should be the temperature of the refrigerator's coldest portion. To determine whether food has been kept warmed (above 63 degrees Celsius) or cold (below 8 degrees Celsius), you might use a probe thermometer.
How cold can a person tolerate?The most susceptible body parts to frostbite are the fingertips, nose, ears, toes, cheeks, and chin, so use as much protection as you can. How cold is too cold? When the windchill drops below 0 degrees Celsius or the temperature drops below zero, experts generally advise staying inside.
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An object has a acceleration of 10m/s^2 if the net force acting on this object were halved, what would the new acceleration of the object be
Answer:
As we increase the force on an object the acceleration increases proportionally. Since the mass does not change as the acceleration increases, we can say that force is equal to acceleration. Therefore, if you double the force you double the acceleration. ... Therefore, mass is inversely proportional to accelerationExplanation:I hope I helped you #learn from khabyIf an object has an acceleration of 10m/s^2 if the net force acting on this object were halved, then the acceleration of the object would become half as well because the force and the acceleration are directly proportional.
What is acceleration?
The rate of change of the velocity with respect to time is known as the acceleration of the object.
As given in the problem an object has an acceleration of 10 m/s^2 if the net force acting on this object were halved, then the new acceleration of the object be 5 meters / second².
Force = mass × acceleration
As the force is directly proportional to the acceleration of the object keeping the mass of the object constant.
Thus, the acceleration of the object would become 5 meters / second².
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Which evidence did Wegener use to develop the theory of continental drift?
Similar fossils were found on different continents.
The climate of Siberia has always been the same.
There is no evidence of glaciers anywhere in South America.
The Rocky Mountains are taller than the Appalachian Mountains.
Answer:
your answer is There is no evidence of glaciers anywhere in South America.
have a good day!
Explanation:
Answer: C
Explanation: i took the test so its correct :)
The weight of the atmosphere results in P_0 at the surface of the oil layer. Then the weight of the oil and the weight of the water combine to create the pressure at the bottom. Why does air pressure decrease with increasing altitude? (Select all that apply.) Less air above pushes down. Hot air rises. The weight of the air above is smaller. Colder air is less dense. There is more air below to push up more strongly. The weight of the air below is smaller. Use the worked example above to help you solve this problem. In a huge oil tanker, salt water has flooded an oil tank to a depth of h_2 = 4.75 m. On top of the water is a layer of oil h_1 = 8.40 m deep, as in the cross-sectional view of the tank as shown in the figure. The oil has a density of 0.700 g/cm^3. Find the pressure at the bottom of the tank. (Take 1,025 kg/m^3 as the density of salt water.) Calculate the pressure on the top lid of a chest buried under 3.80 meters of mud with density 1.75 x 10^3 kg/m^3 at the bottom of a 11.5-m-deep lake.
The pressure at the bottom of the oil layer is given by,
P₁ = P₀ + ρgh₁ = (1.01 x 105 Pa) + (7 x 102 kg/m³) (9.8 m/s2) (8.4 m)
P₁ = (1.01 x 105 Pa) + (576.2 x 102 Pa)
P₁ = 1.58 x 105 Pa
Now, the pressure at the bottom of the tank which will be given using a formula, we have
P\(__{bottom}\) = P1 + \rho g h2 = (1.58 x 105 Pa) + (1.025 x 103 kg/m3) (9.8 m/s2) (4.75 m)
P\(__{bottom}\) = (1.58 x 105 Pa) + (47.7 x 103 Pa)
P\(__{bottom}\) = 2.05 x 105 Pa
The pressure under mud will be given as
P₁ = P₀ + ρgh₁ = (1.01 x 105 Pa) + (1.75 x 103 kg/m3) (9.8 m/s2) (3.8 m)
P₁ = (1.01 x 105 Pa) + (65.1 x 103 Pa)
P₁ = 1.66 x 105 Pa
Now, the pressure on the top lid of a chest buried will be given as:
P\(__{top}\) = P1 + \rho g h2 = (1.66 x 105 Pa) + (1.025 x 103 kg/m3) (9.8 m/s2) (11.5 m)
P\(__{top}\) = (1.66 x 105 Pa) + (115.5 x 103 Pa)
P\(__{top}\) = 2.81 x 105 Pa
The question is clearer in the picture
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If one of the 12V rails required 150 and the second needed 350, how much wattage would the first rail get? in the space provided, enter only the numeric value
To calculate the wattage for the first rail, we need to multiply the voltage (12V) by the current (150A): In electrical circuits, power is calculated by multiplying the voltage by the current. The wattage represents the amount of electrical power consumed or supplied by a device or component in a circuit. In this case, we are calculating the wattage for the first rail using a voltage of 12 volts and a current of 150 amperes.
Wattage = Voltage × Current
Wattage = 12V × 150A
Wattage = 1800W
the first rail would receive 1800 watts of power. This means that the electrical component or device connected to the first rail would consume or require 1800 watts of power to operate effectively. The wattage value provides information about the energy consumption or capacity of the component and helps in determining the appropriate electrical supply and circuit design for efficient operation.
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Parker (73.2 kg) is being dragged down the hall with an applied force of 123 N. If the frictional force is 27.4 N, what is the coefficient of friction in the hall?
Answer:
The coefficient of friction in the hall is 0.038
Explanation:
Given;
mass of the Parker, m = 73.2 kg
applied force on the parker, F = 123 N
frictional force, Fs = 27.4 N
the coefficient of friction in the hall = ?
frictional force is given by;
Fs = μN
Where;
μ is the coefficient of friction
N is normal reaction = mg
Fs = μmg
μ = Fs / mg
μ = (27.4) / (73.2 x 9.8)
μ = 0.038
Therefore, the coefficient of friction in the hall is 0.038
Based on information in the article, which of these
statements is TRUE?
A. The sun's gravity makes the planets orbit
around it.
B. Earth's gravity pulls floating astronauts to
Earth's floor.
C. Only large objects have a pull of gravity on
Earth.
D. Gravity keeps the planets moving in a straight
line.
Based on information the statement that is true is A. The sun's gravity makes the planets orbit around it.
What is the justification?Gravity is a fundamental force of nature that exists between all objects with mass or energy. The force of gravity depends on the mass of the objects and the distance between them. In the case of the solar system, the sun's gravity is the dominant force that controls the motion of the planets.
The planets are constantly pulled towards the sun by its gravitational force, causing them to orbit around it in elliptical paths. This is known as Kepler's laws of planetary motion.
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