Which is the correct expression for the force of static friction, where n is the normal force?A. fs < μsnB. fs ≤ μsnC. fs > μsnD. fs ≥ μsn
Answers
fs ≥ μsn, where fs is the force of static friction and μs is the coefficient of static friction. This means that the force of static friction is equal to or greater than the product of the coefficient of static friction and the normal force (n). The correct expression for the force of static friction is D.
The resistance people feel when they try to move something that is stationary on a surface without actually moving their bodies or the surface they are trying to move it on.
It can be explained as the frictional force that perfectly balances the applied force throughout the body's stationary state.
The static frictional force is self-regulating, meaning that it will always be equal to and the opposite of the applied force.
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Related Questions
Helppppppp :((((((
:((((((
Answers
Answer:
b is the equivalent
do u want explanation
a cube that measures 2 cm on each side has a surface area to volume ratio of
Answers
Size and SA:V are inversely related for a certain form. The ratio of a cube with sides of 2 cm is 3 cm1, which is half of a cube with sides of 1 cm.
In mathematics, what is the surface area?The area is the area occupied by a this double flat surface. It has a square unit of measurement. A three-dimensional object's surface area is the area occupied by its outside surface.
Describe surface area with an example.A 3D object's surface is the entire area that all of its faces cover. For instance, the surface area of a cube is its amount if we wish to determine how much paint is needed to paint it. It is consistently expressed in square units.
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5.0 cm
3.0 cm
H
G
4.0 cm
1
2.4 cm
J
=. Is FI || HJ? Explain how you know.
Find the coordinate of point P that divides
the directed line segment from A(2, 1) to
Answers
The question is incomplete. To determine if FI is parallel to HJ, we need more information about the diagram. From what you've provided, it seems like a sketch of a geometric figure or a map, but it is not clear what the shape is or what the labels represent.
To find the coordinate of point P that divides the directed line segment from A(2, 1), we need to know the location of point P. There are different ways to find the coordinate of point P, depending on the information provided. Here are a few methods:
If we are given the ratio in which P divides the line segment, we can use the section formula to find the coordinates of P. The section formula states that if a point P divides the line segment joining two points A(x1, y1) and B(x2, y2) in the ratio m:n, then the coordinates of P are ((mx2 + nx1)/(m+n), (my2 + ny1)/(m+n)). For example, if we are told that P divides the segment AB in the ratio 2:3, we can use the formula to find P's coordinates as ((32 + 22)/(3+2), (31 + 21)/(3+2)) = (2.2, 1.2).
If we are given the distance between A and P, we can use the midpoint formula to find the coordinates of P. The midpoint formula states that if a point P divides the line segment joining two points A(x1, y1) and B(x2, y2) such that AP = BP, then the coordinates of P are ((x1+x2)/2, (y1+y2)/2). For example, if we are told that AP = 4, we can find the midpoint M of AB as ((2+P_x)/2, (1+P_y)/2), and then use the distance formula to set up an equation: MP^2 = (P_x-2)^2 + (P_y-1)^2 = 4^2. This equation can be simplified and solved for P_x and P_y.
If we are given the slope of the line passing through A and P, we can use the point-slope formula to find the equation of the line and then solve for the intersection point with the line passing through A and B. The point-slope formula states that if a line passes through a point A(x1, y1) with slope m, then its equation is y - y1 = m(x - x1). For example, if we are told that the slope of AP is -2/3, we can find the equation of the line as y - 1 = (-2/3)(x - 2), and then substitute y into the equation of the line passing through A and B: y = (1/2)x - 1. We can then solve for x and y to find the coordinates of P.
Therefore, Without more information about the diagram or the question prompt, it is difficult to provide a specific solution.
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Find the force of attraction between a 60 kg student and:A. Another student of mass 80 kg, 1.4 m away.B. A 130,000 kg blue whale, 10 m away.C. The Great Pyramid in Egypt, with an estimated mass of 5.22 x 109 kg, 1.0 km away.D. A 45 g golf ball, 95 cm away.
Answers
According to Newton's Law of Universal Gravitation, the force between to bodies of masses m and M separated by a distance r is:
\(F=G\frac{Mm}{r^2}\)Where G is the gravitational constant:
\(G=6.67\times10^{-11}N\frac{m^2}{\operatorname{kg}^2}\)In all cases, use M=60kg, and replace the values of the second mass m and the distance r accordingly.
A) m=80kg, r=1.4m
\(\begin{gathered} F=(6.67\times10^{-11}N\frac{m^2}{\operatorname{kg}^2})\times\frac{(60\operatorname{kg})(80\operatorname{kg})}{(1.4m)^2} \\ =1.6\times10^{-7}N \end{gathered}\)B) m=130,000kg, r=10m
\(\begin{gathered} F=(6.67\times10^{-11}N\frac{m^2}{\operatorname{kg}^2})\times\frac{(60\operatorname{kg})(130,000\operatorname{kg})}{(10m)^2} \\ =5.2\times10^{-6}N \end{gathered}\)C) m=5.22*10^9kg, r=1000m
\(\begin{gathered} F=(6.67\times10^{-11}N\frac{m^2}{\operatorname{kg}^2})\times\frac{(60\operatorname{kg})(5.22\times10^9\operatorname{kg})}{(1000m)^2} \\ =2.1\times10^{-5}N \end{gathered}\)D) m=0.045kg, r=0.95m
\(\begin{gathered} F=(6.67\times10^{-11}N\frac{m^2}{\operatorname{kg}^2})\times\frac{(60\operatorname{kg})(0.045\operatorname{kg})}{(0.95m)^2} \\ =2.0\times10^{-10}N \end{gathered}\)The coldest clouds in the ISM are molecular clouds, so named because their temperatures are low enough and their densities high enough for atoms to join together into molecules. These clouds are capable of collapsing to form new stars, in a stellar nursery like the one in the left image. The Pleiades (right image) is an example of stars that formed recently within such a nursery.
Molecular clouds range in mass from a few times the mass of our Sun (solar masses) to 10 million solar masses. Individual stars range from 0.08 to about 150 solar masses.
What does all of this imply about how stars form from molecular clouds?
Answers
Stars form from molecular clouds through a process known as stellar formation.
These clouds, characterized by low temperatures and high densities, provide the ideal conditions for atoms to combine and form molecules. With a mass range spanning from a few solar masses to millions of solar masses, molecular clouds serve as the birthplaces of new stars. The Pleiades cluster serves as a notable example of stars that have recently formed within such a stellar nursery.
The formation of stars from molecular clouds involves several key steps. Firstly, gravitational forces acting on regions of higher density within the cloud cause them to collapse under their own gravity. As the cloud collapses, it begins to fragment into smaller, denser clumps called protostellar cores. These cores continue to collapse, and their central regions become increasingly dense and hot. At this stage, they are known as protostars.
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According to Rahul any two bricks tied together would fall faster than a single
one under the action of gravity by neglecting air resistance. Do you agree with
Rahul? Give a reason to support your answer.
Answers
Answer:
Rahul is wrong.
Explanation:
From Newton's universal law of gravitation, we know that the force of attraction between two falling body masses is directly proportional to product of masses of two bodies and has an inverse proportional relation with the square of the distance between the masses.
If the 2 masses are M1 & M2, while distance between them is d, this can be written as;
F ∝ M1•M2
And F ∝ 1/d²
We also know that the acceleration due to gravity is given as;
g = GM/r²
Where;
M is the mass of earth
r is the radius of earth
From the above 3 formulas, we can deduce that the value of the acceleration due to gravity(g) is independent of the 2 masses of the falling body as it depends on only the mass of the earth and radius of the earth.
This means that the acceleration due to gravity will be the same whether the bricks are doubled or whether it remains single.
Thus, they will fall with same velocity in each case. So Rahul is wrong.
Driving safely at night requires seeing well not only in low light conditions, but also being able to see low contrast
Answers
Answer:
True
Explanation:
Driving safely at night requires seeing well not only under low light, but also requires drivers to see low-contrast objects.
write the ratio of the following?
CaCO3
C2H6
Fe(NO3)3
Answers
Answer:
C2H6 up the road to be with its own in
What is the concentration of H^ + at apH = 2 ? Mol / L What is the concentration of H^ + ions at apH = 6 ? Mol/L How many more H^ + ions are there in a solution at a pH = 2 than in a solution at a pH = 6?
Answers
Answer:
The concentration of hydrogen ion at pH is equal to 2 :\(= [H^+]=0.01 mol/L\)
The concentration of hydrogen ion at pH is equal to 6 : \([H^+]'=0.000001 mol/L\)
There are 0.009999 more moles of \(H^+\) ions in a solution at a pH = 2 than in a solution at a pH = 6.
Explanation:
The pH of the solution is the negative logarithm of hydrogen ion concentration in an aqueous solution.
\(pH=-\log [H^+]\)
The hydrogen ion concentration at pH is equal to 2 = [H^+]
\(2=-\log [H^+]\\\)
\([H^+]=10^{-2}M= 0.01 M=0.01 mol/L\)
The hydrogen ion concentration at pH is equal to 6 = [H^+]
\(6=-\log [H^+]\\\\\)
\([H^+]=10^{-6}M= 0.000001 M= 0.000001 mol/L\)
Concentration of hydrogen ion at pH is equal to 2 =\([H^+]=0.01 mol/L\)
Concentration of hydrogen ion at pH is equal to 6 = \([H^+]'=0.000001 mol/L\)
The difference between hydrogen ion concentration at pH 2 and pH 6 :
\(= [H^+]-[H^+]' = 0.01 mol/L- 0.000001 mol/L = 0.009999 mol/L\)
Moles of hydrogen ion in 0.009999 mol/L solution :
\(=0.009999 mol/L\times 1 L=0.009999 mol\)
There are 0.009999 more moles of \(H^+\) ions in a solution at a pH = 2 than in a solution at a pH = 6.
the temperature of a bowl of hot soup goes down after the soup is poured into a bowl. whats happening to the motion of the particles as it cools
Answers
Given what we know, as with all substances, the particles in the bowl of hot soup will slow down as they cool after being poured.
Why do particles slow when cooled?This has to do with energy.The soup particles are excited by heat energy. As the soup is poured, its heat energy radiates and it loses energy.Decreased energy causes the particles to slow down.Therefore, the motion of the particles of the soup decrease or slows down as the soup cools due to the loss of energy they are experiencing. The soup radiates heat energy into the room or plate, causing the particles to lose energy and slow down.
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Two cars have reached their destinations. One traveled 32 km north, and the other traveled 25 km
east. What is the distance between them?
Answers
Answer:
NE = 40.61km
Explanation:
Given the following data;
North, N = 32
East, E = 25
To resultant distance, NE
We would use Pythagoras theorem;
NE² = N² + E²
NE² = 32² + 25²
NE² = 1024 + 625
NE² = 1649
Taking the square root of both sides
NE = 40.61km
Oxygen is environmentally stable and combines the highest energy for metabolic activity that encourages higher forms of life. Fluorine and chlorine also rate high in these properties. Should we detect high levels of fluorine and chlorine in the atmosphere of another planet or moon, scientists would likely be convinced that advanced life would be on this other "world". 1) The statement as written is true 2) The statement as written is false The major elements that make up life on earth reflects the composition: 1) of stars 2) of the earth's crust 3) of earth's atmosphere 4) of our uniqueness as a planet s
Answers
We should detect high levels of fluorine and chlorine in the atmosphere of another planet or moon, scientists would likely be convinced that advanced life would be on this other "world". 1) The statement as written is true because the major elements that make up life on Earth reflect the composition of the Earth's crust.
Oxygen, fluorine, and chlorine all have high energy for metabolic activity which is important for sustaining higher forms of life. If high levels of fluorine and chlorine were detected in the atmosphere of another planet or moon, scientists would consider it as evidence of advanced life. Regarding the major elements that make up life on Earth, the composition reflects that of the Earth's crust, this is because living organisms require nutrients such as carbon, nitrogen, and phosphorus which are found in the Earth's crust.
However, the unique combination of these elements and their interactions with the environment are what make Earth a habitable planet for life as we know it. Therefore, the composition of life on Earth reflects both the composition of the Earth's crust and the unique conditions that allow for the evolution and sustenance of life. In summary, 1) The statement as written is true and the major elements that make up life on Earth reflect the composition of the Earth's crust.
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a rail car moving at 10m/s collides with and connect to another stationary car. What is their final velocity?
Assume they have the same mass
Answers
Answer:
read this it might help some
When a moving object collides with a stationary object of identical mass, the stationary object encounters the greater collision force. When a moving object collides with a stationary object of identical mass, the stationary object encounters the greater momentum change.
Explanation:
A model shows a machine that works using electrical fields. What would this machine need for the electrical field to function properly? (1 pe
O at least two charged, interacting parts
O all neutral components
O moving parts, for kinetic energy
O springs, to store potential energy
Answers
Answer:
At least two charged, interacting parts.
I Hope This Helps!
The mass of the beam is 3480kg
Calculate the weight of the beam. Remember that a mass of 1 kg has a
weight of 10 N.
Answers
Answer:
34800N
Explanation:
weight = mass × gravitational field strength
w=mg
w= 3480×10. (Gravitational field strength is constant at the value of 10)
w=34800N
A 1.50 kg mass acclerates accross a smooth table at 15.0m/s. What is the net force?
How do you find net force?
I think its 20 points, and if there is more than one answer, will mark brainliest!
Answers
Answer:
We follow here the basics of problem-solving presented earlier in this text, but we emphasize specific strategies that are useful in applying Newton’s laws of motion. Once you identify the physical principles involved in the problem and determine that they include Newton’s laws of motion, you can apply these steps to find a solution. These techniques also reinforce concepts that are useful in many other areas of physics. Many problem-solving strategies are stated outright in the worked examples, so the following techniques should reinforce skills you have already begun to develop.
Explanation:
A person drops a ball off the top of a 10 story building. What statement below best describes the movement of the ball?
Answers
Most helpful Answer~
There are no options~
Anyway If the ball is of bad quality it will get deflated/ or strike out.
' The must reasonable thing that could happen is that the ball will bounce'
*Smile* :)
Q.3. Fill the table to describe the characteristics of the states of matter.
Do they have
definite shape?
Vapor
Water
Ice
States of
Matter
Do they have
definite volume?
Do they
compress?
Answers
Answer:
Three states of matter exist—solid, liquid, and gas. Solids have a definite shape and volume. Liquids have a definite volume,
Explanation:
According to the information, the table is completed as follows: Do they have definite shape? no (vapor), no (water), yes (ice); Do they have definite volume? no (vapor), yes (water), yes (ice); Do they compress? yes (vapor), no (water), no (ice).
How to fill the table to describe the characteristics of the states of matter?To fill the table to describe the characteristics of the states of matter we have to look for additional information of each state of matter and then complete the table. According to the information we can infer that the correct way to complete the table is:
Do they have definite shape? no (vapor), no (water), yes (ice); Do they have definite volume? no (vapor), yes (water), yes (ice); Do they compress? yes (vapor), no (water), no (ice).
Vapor | No | No | Yes
Water | No | Yes | No
Ice | Yes | Yes | No
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It takes five hours to drive from Fort Worth to Midland, which is a distance of 300 miles. What
would be the average speed for this trip?
Answers
Answer:
60
Explanation:
(hint: speed = distance/time)
The average speed for this trip will be \(\rm 60 mile\ hr^{-1}\). The ratio of the total distance and time is average velocity.
What is the average speed?The total distance traveled by an object divided by the total time taken is the average speed.
The average speed of an object indicates the pace at which it will traverse a distance. The metric unit of speed is the meter per second.
The given data in the problem is;
t is the time taken = 5 hour
d is the distance tyravelled=300 miles
The average velocity is found as;
\(\rm v_{avg} = \frac{d_{total}}{t{total}} \\\\\ \rm v_{avg} = \frac{300}{5} \\\\ \rm v_{avg} = 60 mile\ hr^{-1}\)
Hence the average speed for this trip will be \(\rm 60 mile\ hr^{-1}\)
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Help me out !!! please :)
Answers
Answer:
B and C are charged ions because the number of electrons does not equal the number of protons - thus the atom is an ion (charged)
What is a human endeavor
Answers
Answer:
Education is a human endeavor. it prepares the individual for life and for the future.
Explanation:
perhaps we can say that a "human endeavor" is one in which humans strive to achieve something of significance, or something of significance which only can be achieved via human intelligence.
plsssssss i need help Which source of law is most like common law: statutes, case law, or administrative law? Explain
Answers
Answer:
The answer is "case law".
Explanation:
This law is not based on law, but on legislatures, statutes, or legislation, on judgments. Its also used as a different term with common law, which is the collection of precedents as well as power on a specific subject established in previous judicial decisions that are a part of Common law, which is also recognized as case law to establish by the court system based on legal case law.
When an infrared heater is switched on, a person a few metres away begins to warm up. Explain what has moved from the heater to the person and how this occurred.
Answers
When an infrared heater is switched on, a person a few meters away begins to warm up, has moved from the heater to the person is transfer of thermal energy, this occurs through the movement of infrared radiation, which is a form of electromagnetic radiation with longer wavelengths than visible light.
Infrared heaters generate heat by emitting infrared radiation from their heating elements, such as quartz tubes or ceramic plates. This radiation travels through the air and is absorbed by objects and people in its path, including the person who feels the warmth. The absorbed radiation raises the temperature of the object or person, causing them to feel warmer.
Infrared radiation does not rely on direct contact or the movement of air, making it an efficient way of transferring heat over a distance. This type of heating is known as radiant heating, and it is different from convection heating, which relies on the movement of air particles to transfer heat. In summary, when an infrared heater is switched on, thermal energy moves from the heater to a person a few meters away via infrared radiation. This radiation is absorbed by the person, raising their temperature and making them feel warmer.
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A fan operating at 260V with a current being supplied at 13A. What is the effective resistance at which it is being operated?
Answers
Answer:
20 ohms
Explanation:
Resistance=Potential difference÷Electric current
X=260÷13
X=20
A soft drink from Australia is labeled ""Low-Joule Cola."" The label says ""100 mL yields 1.7 kJ."" The can contains 375 mL of cola. Chandra drinks the cola and then wants to offset this input of food energy by climbing stairs. How high would Chandra have to climb if she has a mass of 65.0 kg?
Answers
To calculate the height Chandra would have to climb to offset the energy intake from the Low-Joule Cola, we need to convert the energy provided by the drink into potential energy gained from climbing stairs.
First, we'll calculate the total energy intake from the cola. The label states that 100 mL yields 1.7 kJ. Since the can contains 375 mL, the total energy intake is (1.7 kJ/100 mL) * 375 mL = 6.375 kJ.
To convert this energy into potential energy gained from climbing stairs, we can use the equation:
Potential Energy = m * g * h
Where:
m = mass (65.0 kg)
g = acceleration due to gravity (approximately 9.8 m/s^2)
h = height to be determined
Rearranging the equation to solve for h:
h = Potential Energy / (m * g)
Substituting the values:
h = 6.375 kJ / (65.0 kg * 9.8 m/s^2)
Calculating the result:
h ≈ 0.010 m or 10 cm
Therefore, Chandra would need to climb approximately 10 centimeters to offset the energy intake from drinking the Low-Joule Cola.
Chandra would have to climb approximately 10 centimeters to offset the energy intake from drinking the Low-Joule Cola, assuming she has a mass of 65.0 kg. The calculation is based on converting the energy intake from the cola into potential energy gained from climbing stairs using the formula for potential energy.
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An object has a density of 0.755 g/mL. Its volume is 640 mL. What is its mass?
Answers
Answer:Density = 7.5 g/ml (By putting the given values.) [ The ratio of the mass to volume is the density, that's why the unit of the density is also the ratio of the unit of mass to the unit of volume. ] Hence, the density of the object is 7
Explanation: Google
Find the acceleration
Answers
Answer:
a=5m/s
Explanation:
Forces going to the left: \(F_{3}\)
Forces going to the right: \(F_{1}\) and \(F_{2}\)
To indicate the different directions, let the forces going to the left be negative, and the sign on forces going to the right be positive.
The total forces acting on the system are:
\(F_{1}\) + \(F_{2}\) + \(F_{3}\)
100N + 80N - 30N = 150N
The overall force is therefore 150N going to the right (sign is positive). Now time to find the overall acceleration:
Force = mass * acceleration
150 = 30a
a=5m/s
Converging lenses are _____ at the center and _____ at the edges. a. thickest, thinnest b. thinnest, thickest
Answers
Answer:
Converging lenses are thickest at the center and thinnest at the edges.
Explanation:
Lenses are transparent medium that refracts all incident light. Converging lens is one of the type of lens that we have and they are also known as convex lenses. Converging lenses are formed from the combination of two convex mirror. They are thickest at the center and thinnest at the edges. All incident light on a convex lens converges after refraction
List 4 forms of energy
Answers
Answer:
Chemical energy is energy stored in the bonds of atoms and molecules. ...
Mechanical energy is energy stored in objects by tension. ...
Nuclear energy is energy stored in the nucleus of an atom—the energy that holds the nucleus together. ...
Gravitational energy is energy stored in an object's height.
Answer:
Nuclear power
Electricity
Mechanic
Gravity
Explanation:
K=(1/2)my^2 v?
A.) K=mv
B.) m= Kv^2
C.) v=sqrt(2k/m)
D.) none of above
Answers
Answer:
The answer is C. The explanation is below.
