The resistance provided to moving objects by the surface they are sliding or moving on is measured as sliding friction or dynamic friction. Sliding friction starts to work as soon as even the object begins to move.
What do static and dynamic friction mean?
When two bodies are in touch with one another and at rest, they experience static friction. Friction is what keeps anything from flowing while it is motionless. Dynamic friction, also known as kinetic friction, is friction that prevents a body from moving while it is already moving.
What kinds of dynamic friction are there?
There are two forms of dynamic friction: Sliding Resistance Friction as it rolls.
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Pick the winner! Which do you think will have more momentum and push the other backwards? And WHY? Explain assumptions you make: A big loaded truck driving on the freeway OR a baseball sized meteorite falling down from space
Answer:
I would assume that the big loaded truck driving on the freeway would have more momentum and push the baseball sized meteorite backwards. This is because the truck is much larger and heavier than the meteorite, and it is also moving at a much higher speed. The momentum of an object is directly proportional to its mass and velocity, so the truck would have a much greater momentum than the meteorite. Additionally, the truck is moving on a solid surface (the freeway) while the meteorite is moving through the air, which would also affect its momentum. However, this is just an assumption based on the information given, and the actual outcome would depend on many factors, such as the exact speed and mass of the truck and meteorite, the angle and direction of their motion, and any other forces that may be acting on them.
Explanation:
Answer:
Explanation:
I'm going to guess the big truck.
The truck does have a lot more mass, while the meteorite has a lot more speed.
p = mv
mass of truck = 5,000 kg , mass of meteorite = 1 kg ( it could be a metal)
truck has 5,000 times mass
velocity of meteorite 213,000 km/h ( as it enters atmosphere) , truck 55 km/h
3900 times more velocity
The truck wins.
Also, by the time the meteorite gets to the ground it will have slowed down considerably. Ofc, the truck will be on the ground.
A 0.33-m-long violin string has a mass of 0.89 g. The peg exerts a 45 N force on it. What can you determine about the sound produced by that string?
When utilizing the A4 = 440Hz standard, the tuned strings provide equal temperament frequencies of G3 (196 Hz), D4 (293.7 Hz), A4, and E5 (659.3 Hz).
The strings of the violin are frequently tuned in perfect fifths. G3, D4, A4, and E5, in order of lowest to highest, are the pitches. Alternate tunings are occasionally used, especially in bluegrass and kindred fiddling styles.
The violin is the string instrument with the highest pitch in the current string family. The strings are tuned a fifth apart to provide the equal temperament frequencies G3 (196 Hz), D4 (293.7 Hz), A4, and E5 using the A4 = 440 Hz standard (659.3 Hz).
The violin can play notes with frequencies ranging from 196 Hz for the lowest note, G3, to 2,637 Hz for the highest note, E7. The greatest synthetic harmonic note, D8, is 4,698 Hz while the highest genuine note, A7, is 3,520 Hz
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explain how la nina and el nino are similar and different
Answer:
(differences)
1- El Niña typically lasts 9-12 months while La Nina typically lasts 1-3 years even tho both occur every 3 to 5 years
2- El Niño refers to the above-average sea-surface temperatures that periodically develop across the east-central equatorial Pacific.
La Niña refers to the periodic cooling of sea-surface temperatures across the east-central equatorial Pacific.
3- Although El Niño and La Niña have an influence on global climate trends, they do not affect all regions similarly, nor do their impacts in a particular location. La Niña causes basically the opposite changes in temperature as El Niño in many areas, especially in the tropics.
a car moving at a steady 10 m/s on a level highway encounters a depression that has a circular cross-section with a radius of 30 m. the car maintains its speed as it drives through the depression. what is the normal force exerted by the seat of the car on a 60.0-kg passenger when the car is at the bottom of the depression?
The automobile, which weighs 388 newtons, is at the bottom of the depression. At 17.15 m/s, the automobile loses contact with the bumpy road.
The normal force is the force that surfaces use to prevent solid objects from piercing one another. Normal forces include contact forces. Two surfaces that are not in contact cannot be moved by a normal force.
Calculation:r = 30 m
v = 10 m/s
m = 60 kg
(a) Let N be the normal reaction.At the bump
N = mg - mv^2 / r
N = 60 x 9.8 - 60 x 10 x 10 / 30 = 588 - 200 = 388 newton
(b) Then the contact loose, N = 0So, mg = mv^2 / r
v^2 = r x g = 30 x 9.8 = 294
v = 17.15 m/s.
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What is natural and artificial sound?
Answer:
The Natural sounds contained sounds of living objects. The Musical sounds contained notes of different musical instruments, whereas the Artificial sounds were daily object-like sounds.
Explanation:
hope this helps!
Describe two vectors a andb such that vector a+ vector b= vector c and a+b=c
(b) vector a + vector b= vector a - vector b
(c) vector a + vector b + vector c and a2 +b2=c2
can you show me how to do this problem and show all work myprofessor didn't go over any of this and i dont have a clue.
Answer:
a + b = c where a and b and c are vector quantities
Since c is the result of adding vector b to vector a (to add two vectors the vectors are connected head to tail)
a^2 + b^2 - 2 ab cos θ = c^2 is an expression of such a relationship
Note that a^2 + b^2 = c^2 if a and b are at right angles to one another
Another way to express this is:
a x + b x = c x where a and b are the x-components of a and b
a y + b y = c y describes the y -components of a and b
The above two equations will provide the x and y components of vector c
What is dramatic irony short answer?
A literary device known as dramatic irony occurs when the audience or the reader has a better understanding of the events or characters in a work than the characters themselves.
What is dramatic irony, and how can you spot it?dramatic irony Add to list Share. Dramatic irony is when a character in a Titanic movie leans on the balcony and exclaims, "It's so beautiful I could just die," immediately before the ship hits the iceberg. Dramatic irony arises when the audience is aware of information that the characters are not.
Why is it dramatic irony?Dramatic irony occurs when the audience is aware of a situation before some of the players are. This knowledge frequently creates a sense of suspense since we know the character(s) will eventually discover the truth.
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A rugby player runs with the ball directly toward his opponent's goal, along the positive direction of an x axis. He can legally pass the ball to a teammate as long as the ball's velocity relative to the field does not have a positive x component. Suppose the player runs at speed 5.9 m/s relative to the field while he passes the ball with velocity vector v BP relative to himself. If vector v BP has magnitude 7 m/s, what is the smallest angle it can have for the pass to be legal?1° (relative to +x axis)
If he passes the ball with a velocity vector v BP relative to himself, and v BP has a value of 7 m/s, then the least angle it can have is 32.5 °.
A player runs at a speed relative to field is v1 = 5.9 m/s
A player runs at a speed relative to himself is v2 = 7 m/s
v = v_1 +v_2
= 5.9 m/s + 7.0 m/s
= 12.9 m/s
smallest angle by which the player hits the ball is θ = cos^-1 ( 5.9 / 7.0)
= 32.5 degrees
Velocity is the rate at which an object is changing position when it is observed from a certain point of view and as measured by a particular unit of time. It is defined as the direction at which an object is traveling. Speed is the rate of movement along a path in contrast to velocity, which specifies the direction and speed of an object's motion.
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What are period 2 elements called?
Period 2 elements are called as Bridge elements.
When we go through the detailed analysis of the periodic table we get that the elements like Li, Be, B, C, N, O, F, and Ne are the elements which are in the second period of the periodic table.
Such elements have similar qualities and can be compared to those from the third period or the usual elements. The elements of period 2 have common traits on the basis of factors like ion polarization and electronegativity with the elements of period 3.
Due to this distinct behaviour, such elements are named "bridge elements"
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Is wind and solar energy sustainable?
Because they have a little negative impact on the environment, are widely available, and are continuously supplied by nature, renewable energy sources like wind, solar, and hydropower are considered sustainable energy sources.
Is solar power a sustainable source of power?Resources that won't damage the environment or the energy needs of future generations are used to produce sustainable energy. The most popular sustainable energy sources, such hydroelectric, solar, and wind, all incorporate renewable energy.
How enduring is wind power?Wind power is the ideal technology for producing energy in a safe and eco-friendly manner because it emits no pollutants, is readily available nearby, is non-renewable, is economical, and creates wealth and jobs.
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Question Completion Status:QUESTION 1Organizational commitment has been found to be positively correlated with all of the following exceptan employee's agean employee's time on the job.an employee's level of educationthe current job market.2 pointsQUESTION 2Shannon is given random bonuses of varying amounts throughout the year based on "how well the company is doing." She is being reinforced using afixed ratio schedule.variable ratio schedule.fixed interval schedule.variable interval schedule.2 pointsQUESTION 3Glass created a computer game experiment whose results indicated that Type A subjects?Showed a significantly higher physiological stress response rates than the Type B subjects, but recovered back to baseline rates as quickly as the Type Bs.Showed significantly lower physiological stress response rates than the Type B subjects.Showed similar physiological stress response rates to the Type B subjects in the game, but had a signficantly higher stress response to the "harrass" condition.Showed significantly higher stress response rates but beat the game more times than the Type B subjects.2 pointsQUESTION 4According to goal-setting theory, the key determinants of motivation in the workplace arejob satisfaction and the accomplishment of goals.monetary incentives associated with meeting goals.specific, challenging opportunities and commitment to goals.specific, challenging opportunities and organizational policies directed at goal attainment.2 pointsQUESTION 5There is a negative correlation between age and voluntary absenteeism.TrueFalse
Explanation of the Current Job Market: Numerous studies have demonstrated considerable favourable Additional: Organizational commitment is strongly positively correlated with job satisfaction.
People who are more satisfied with their jobs The value of the collection of employee actions that either positively or negatively influence the achievement of company goals is referred to as With the exception of an employee's age and length of service, all of the following have been proven to be positively connected with organisational commitment. Examples of employment enrichment include diversifying skill sets, giving roles more responsibilities, giving work a deeper purpose, fostering autonomy, and providing feedback. Adding more of the same obligations associated to the same position satisfaction won't achieve the purpose of exposing the person to tasks typically allocated for higher positions or those with more specialised duties
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A force of 200N is exerted on an area of 50m. Calculate the pressure exerted by the force
Answer:
4N/m
Explanation:
pressure = force/area
pressure = 200/50 N/m
= 4N/m
What does λ mean in wavelength?
Mean absorbance at each wavelength is denoted by A(λ).Distance between measurements in wavelengths is dλ.
What does one wavelength go by? A(λ) is short for average absorbance at each wavelength.Interval between measurements of wavelength is denoted by dλ. When wavelength is expressed in metres, 1/ stands for the number of waves in a wave train that can fit within a length of one metre, or, if wavelength is expressed in centimeters, the number of waves that can fit within a length of one centimeter.The wavelength of the spectral line is known as this number.The Greek symbol lambda () is commonly used to represent a wave's length. Wavelength is defined as the product of the speed (v) and frequency (f) of a wave train in a given medium.In meters, the symbol for wavelength is.In meters per second, the v represents the wave velocity (mps). Furthermore, the f stands for frequency, which is expressed in hertz (Hz).To learn more about wavelength refer
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Which of Newton's Laws is demonstrated by a ball rolling to a wall then stopping?
answer choices
Newton's First Law
Newton's Second Law
Newton's Third Law
Law of Acceleration
In addition to the anti-VEGF antibody, Marie has decided to also add a VEGFR primary antibody. At which position do you expect the band for VEGFR to appear? Remember that in SDS-PAGE proteins are separated according to their molecular weight. a) VEGFR runs at a lower molecular weight than VEGF b) VEGF and VEGFR run at the same molecular weight c) VEGFR cannot be detected by Western blotting d) VEGFR runs at a higher molecular weight than VEGF
VEGFR runs at a higher molecular weight than VEGF. In the position, VEGFR is expected to appear band. Hence, option (c) is correct.
What is VEGFR?A chemical that binds to vascular endothelial growth factor (VEGF) receptors, which may be present on some cancer cells. This might stop cancers from forming the new blood vessels they require to grow.
Anti-VEGFR monoclonal antibodies of various sorts are being researched for the treatment of cancer. These chemicals fall within the categories of monoclonal antibodies and antiangiogenesis agents.
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Is working from home Scope 3 emissions?
Home office & remote work emissions fall under scope 3 because they are indirectly produced by your business.
What is a scope 3-carbon example?Scope 3 emissions result from company operations but come from sources that the company does not own or control.Activities falling under scope 3 include things like using goods and services, transporting fuel that has been purchased, and extracting and producing materials that have been purchased.
What does climate change scope 3 entail?Direct emissions form controlled or owned sources are covered by Scope 1.The generation of the purchased energy, steam, heating, and cooling used by the reporting enterprise is covered by scope 2's indirect emissions.All the other indirect emission that take place along a company's value chain are covered by scope 3.
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An object is thrown upward with a speed of 20m/s near the surface of a planet where the gravitational field strength is a constant magnitude of 6N/kg. The vertical position versus time of the object is shown in the graph. Is the object considered to be in free fall?
A. Yes, because the only force exerted on the object is the force due to gravity from the planet.
B. Yes, because any object that falls is considered to be in free fall.
C. No, because the object does not fall with an acceleration of nearly 10m/s2.
D. No, because the object has an acceleration due to gravity that is different from the gravitational field strength of the planet.
A planet's gravity is the only force acting on the object, hence the answer is yes.
How does gravity's field strength become calculated?This is a technique for calculating the gravity. Weight divided by mass equals the gravitational field's strength. On Earth, there is a 10 N/kg gravitational field.
The gravitational field at the satellite's location and the acceleration of the spacecraft are both compared.The speed of gravity at the orbital radius is equal to the speed at which a satellite in a circular orbit moves toward the object it is circling. Objects in orbit are constantly falling, like people in an elevator.
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How population control helps in sustainable development
Increasing population makes it more challenging for limited and lower-middle income nations to finance the growth in public spending on a per capita basis required to eradicate poverty.
Which demographic do you refer to?Any whole group that shares at least one trait is referred to be a population. People do not make up all populations. Populations can include, but not be limited to, individuals, animals, organizations, structures, buildings, cars, farms, items, or occasions.
What are the many forms of population?A population is an identified collection of objects the with purpose of study and data collecting. Examples include humans and animals. It comprises of a related collection of species that live in a certain area and have the ability to interbreed.
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The table shows the acceleration due to gravity on four different planets. What planet is a person standing on if the person has a mass of 35. 0 kg and weighs 343 n?.
Planet that the person is standing on is Earth. However, it is also possible that the person is standing on a planet or moon with a similar acceleration due to gravity.
The weight of an object is the force exerted on it by gravity, and it is equal to the mass of the object multiplied by the acceleration due to gravity. The acceleration due to gravity is a measure of the strength of the gravitational field at a particular location, and it is denoted by the symbol g.
The weight of an object can be calculated using the equation:
Weight = Mass * g
In this case, the person has a mass of 35.0 kg and a weight of 343 N. To determine the acceleration due to gravity at the location where the person is standing, we can rearrange the equation above to solve for g:
g = Weight / Mass
Plugging in the values given, we get:
g = 343 N / 35.0 kg
This simplifies to:
g = 9.8 m/s^2
This table shows the acceleration due to gravity on four different planets what planet is a person standing on if the person has a mass of 85.0 kg and weighs 305 N mercury is 3.59 Venus 8.87 Earth 9.81 mars 3.77
A.mercury
B.Venus
C.earth
D. Mars
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What is the relationship between frequency f and wavelength λ if tension is constant?
The exact relationship between frequency and wavelength is f = c/λ.
When you change the tension on the string, you are changing the wave speed (c) and frequency, but not the wavelength. Specifically, as the frequency goes down, the speed goes down by the same factor, and so the wavelength doesn't change.
What is a wavelength?
Wavelength is the distance between identical points( conterminous peaks) in conterminous cycles of a waveform signal propagated in space or along a line. In wireless systems, this length is generally given in measures( m), centimeters( cm), or millimeters( mm). In the case of infrared( IR), visible light, ultraviolet( UV), and gamma shafts( γ)The wavelength is more frequently given in nanometers( nm), which are units of 10- 9 m, or angstroms( Å)., which are units of 10- 10m. Wavelength is equally commensurable with frequency, which refers to the number of surge cycles per second. The advanced is the frequence of the signal, the shorter the wavelength.To know more about Wavelength, click the link given below:
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The angular position of a point on the rim of a rotating wheel is given by θ = 4.0t - 3.0t^2 + t^3, where is in radians and t is in seconds. What are the angular velocities at t = 2.0{~s}t=2.0 s.
The angular velocity of the pointed rim of a rotating wheel if, The angular position of a point on the rim of a rotating wheel is given by θ = 4.0 t - 3.0 t² + t³, is 4 rad/ sec.
What is Angular velocity?The rotation rate, which refers to how quickly an item rotates or circles in relation to another point, is measured pictorially by angular velocity. Angular velocity can be defined as the speed at which an item rotates or revolves around an axis.
Given:
θ = 4.0 t - 3.0 t² + t³
Calculate the angular velocity by differentiating the position function as shown below,
dθ / dt = d (4.0 t - 3.0 t² + t³) / dt
V = 4.0 - 6t + 3t² (Change in position is equal to velocity)
Put the value of time, t = 2
V = 4 - 6 × 2 + 3 × 2²
V = 4 - 12 + 3 × 4
V = 4 - 12 + 12
V = 4 rad/sec
Thus, the angular velocity is 4 rad/sec.
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If the resource is used to generate electricity, what energy transfer happen and how it is done.
Electricity can be generated by coal, hydroelectric dams, etc.
Energy transfer in dams can be Potential Energy < Kinetic Energy < Mechanical Energy < Electrical Energy. It is done by hydro power generators.
If the resource is used to generate electricity, the energy inside the resource ( potential or kinetic energy) transfers happen.
What are resources?Resources are all things in our environment that we can use to meet our requirements, provided they are technologically feasible, fiscally practical, and culturally acceptable. The resources themselves are crucial human beings. They convert naturally occurring materials into resources and use them.
Renewable resources are those that can be replenished or replicated by physical, chemical, or mechanical processes. Further classifications of the renewable resource include continuous and flow.
For instance, water, woods, wildlife, and solar and wind energy.
The occurrence of non-renewable resources spans a relatively long geological period. The creation of these resources takes millions of years. While certain resources, such as metals, can be recycled, others, such as fossil fuels, cannot be recycled and become depleted after being used. Minerals and fossil fuels, for instance.
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They have two force vectors, 3cm by 5cm long. What is the intensity and how much? If the standard 1cm is equal to 21n
To find the magnitude of a force vector that is 3 cm by 5 cm, you would use the formula:
magnitude = [tex]sqrt(3^2 + 5^2) = sqrt(9 + 25) = sqrt(34) = 5.8[/tex]
1 cm = 21 N, you would multiply the magnitude by 21:
[tex]intensity = magnitude * 21 = 5.8 * 21 = 121.8 n[/tex]
What are force vectors?A force vector is a physical quantity that represents a force acting on an object. It has both magnitude and direction, and it is represented graphically by an arrow with a length proportional to its magnitude and an orientation that shows its direction.
For example, if you push a book across a table, the force you apply to the book is a force vector. It has a certain magnitude (e.g. 10 newtons), and it is directed from your hand towards the book.
Force vectors are important in physics because they allow us to analyze the forces acting on an object and predict how the object will move in response to those forces. In order to do this, we can use vector addition, which allows us to add multiple force vectors together to find the net force acting on an object.
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expert that helps you learn core concepts.See AnswerWhat of the following is false about memory?Select one:a. human memory has emotional overtonesb. human memory is associative and content addressable.c. there is no capacity limit in short term memory.d. memory is reconstructive thus it is possible that we create false memories.
Knowledge from sensory memory is transferred to short-term memory, which occasionally links it to information stored in long-term memory. storage for temporary memories.
The ability to link events, learn, and make sense of our life is precisely what memory enables. In essence, it enables us to construct Explicit associative memory requires conscious recall, whereas implicit associative memory relies on an unconscious process called priming. The cognitive process of selecting focusing on one part of the world while disregarding others, attention transfers information from sensory memory into short-term memory by filtering out all but the stimuli that are of interest at any given moment
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What is the unit for wavelength λ?
The SI unit of wavelength is meter usually denoted as m. While measuring wavelength the multiples or fractions of a meter is also used.
What is a meter?
The meter was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole along a great circle, making the circumference of the Earth approximately 40,000 km. In 1799, the meter was redefined as a prototype meter (the actual bar used was changed in 1889). In 1960, the power meter was redefined in terms of a certain number of wavelengths of a certain krypton-86 emission line. The current definition was adopted in 1983 and slightly modified in 2002 to make it clear that the meter is a measure of proper length.To know more about meter, click the link given below:
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in part (c), how hard does the track push on the shell at point a, the top of the circle?
The force with which the track pushes on the shell at point A is F = 2/3 m g.
In part (c), 1/2 m v² = m g h₀ - 2 m g R
v² = 2 g h₀ - 4 g R
v² = 2 g (17 R/6 ) - 4 g R
v² = 5/3 × g R ≥ g R ----(1)
Let us calculate F.
Substituting (1) in F,
F = mv²/R - mg = m/R (5/3 g R) - m g = 5/3 × m g - m g = 2/3 m g
Thus, the force with which the track pushes on the shell at point A is F = 2/3 m g.
The question is incomplete. The complete question is 'A thin-walled hollow spherical shell of mass m, radius r, moment of inertia I = (2/3) MR² starts from rest and rolls without slipping down. Points A and B are on a circular part of the track having a radius R. The diameter of the shell is very small compared to h₀ and R.
(c) Suppose the track now became without friction, so the shell just slid without rolling but started at height h₀. Would it still complete the loop-the-loop. Why?
(d) In part (c), how hard does the track push on the shell at point A.'
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what is the volume of 19.6 g of a liquid that has a density of 0.967 g/ml?
The volume of the liquid is 20.26ml.
Volume is a measurement of three-dimensional space that is occupied. Numerous imperial or US customary units, as well as SI-derived units (such the cubic metre and liter), are frequently used to quantify it numerically (such as the gallon, quart, cubic inch).
We are given that,
Mass = m = 19.6g
Density = d = 0.967 g/ml
To calculate the volume of the liquid can be given as,
density = mass/volume
V = m/d
V = (19.6g)/(0.967g/ml)
V = 20.26ml
Therefore , the volume of the liquid is 20.26ml.
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a wave has a period of .096 seconds. what is the frequency
Answer:
T = 10.417
or 10 5/12
Explanation:
T = 1/f
f = 0.096
T = 1/0.096
T= 10.417
A particle moves along the x-axis so that at any time t≥0 its position is given by x(t) = t3 − 3t2 − 9t. For what values of t is the particle at rest?
At [tex]t = 3[/tex], the particle will be at rest for the position along the x- axis which has been given as [tex]v(t) = t^{2} -3t^{2} -9t[/tex].
What do we mean by particle at rest?
You could understand the phrase "A particle at rest tends to stay at rest" to mean that a particle that is not moving relative to some reference objects tends to remain stationary relative to those same things.
The particle is at rest when velocity of the particle is [tex]0[/tex]. From this we know that the velocity is [tex]v(t) = t^{2} -3t^{2} -9t[/tex]
Therefore the velocity is [tex]0[/tex] when [tex]t[/tex] is
[tex]t^{3} -3t^{2} -9t = 0[/tex]
[tex]t( t^{2} -3t -9)[/tex] [tex]= 0[/tex]
[tex]( t^{2} -3t -9) = 0[/tex]
[tex]t^{2} -3t -3t -9 = 0[/tex]
[tex]t(t -3)-3(t -3) = 0[/tex]
[tex]t = 3[/tex]
Hence, At [tex]t = 3[/tex], the particle will be at rest.
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the trunk of an elephant is also used for one of these activities which one?
Answer:
b. collecting food
other options are wrong as elephant cant do those things