I need a equation for a problem in using a pulling force a mass a coefficient of static friction a coefficient of kinetic friction and solving for the frictional force


Answer 1
Answer: The minimum pulling force required to start it moving is
equal to the static frictional force.

F = (mass) x (gravity) x (coefficient of static friction).

Once it's moving, the force required to keep it moving at a steady speed,
without speeding up or slowing down, is the force of kinetic friction.

F = (mass) x (gravity) x (coefficient of kinetic friction).

In both equations, [ (mass) x (gravity)] is just the object's 'weight'.

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Advantages and disadvantages of solar energy
Which of these is an illuminated source of light? A. the sun B. a star C. the earth seen from the moon D. a meteorite as it burns up in the atmosphere ***ooh i don't know this one at all! thank you!!
An electromagnetic am band radio wave could have a wavelength of?1) .005m 2) 5m 3) 500m 3) 5,000,000m
Ferns are located in which zone of deciduous forests?a. tree stratum b. small tree and sapling c. shrub d. herb
What is the force required to produce an acceleration of 46.4

Which of the following statements is true?a. Money is a medium of exchange.
c. Money serves as a store of value.
b. Money is a unit of account.
d. all of the above



A. Money is a medium of exchange.


Money actually serves several different key functions in our economy. It is a medium of exchange, a unit of account, and a store of value.

  • Medium of Exchange: When money is used to intermediate the exchange of goods and services, it is performing a function as a medium of exchange.
  • Unit of Account: It is a standard numerical unit of measurement of market value of goods, services, and other transactions.
  • Store of Value: To act as a store of value, money must be reliably saved, stored, and retrieved. It must be predictably usable as a medium of exchange when it is retrieved.

Final answer:

D. All of the above statements are true. Money is a medium of exchange, a unit of account, and a store of value.


Money is a medium of exchange because it is used to buy goods and services. It is also a unit of account because prices and values are expressed in terms of money. Lastly, money serves as a store of value, allowing individuals to save and accumulate wealth over time. Money serves various essential functions in modern economies. It is a medium of exchange, facilitating the buying and selling of goods and services.

Money also acts as a unit of account, providing a common measure of value for comparing prices. Additionally, it serves as a store of value, allowing individuals to save and transfer purchasing power over time. Money enables economic efficiency, trade, investment, and financial transactions, making it a cornerstone of economic systems.

Learn more about Money here:



What type of medium makes sound travel the fastest and Explain WHY.



V solids > V liquids > V gas


Speed of sounds depends of the type of material in which it travels, this phenomenon may be determined by the following formula:

V = √(B/ρ)


V= speed of sound

B= represent the medium hardness, this coefficient is expressed in Pascal units. The bigger the number, the hardest the material and sound travels faster. This is because in hardest material, particles are closer together so sound travels faster

ρ= density, for this case, for a high density value, sound travels slower

Both factors (B and P) should be considering when calculating the speed of sound

For example, for iron, B has a high value so sound travels faster, but also has a high density (this would make sound travels slower), but for this type of materials, B is much more bigger that P, hence V will be always a high number

Actually : V solids > V liquids > V gas

ρ is also important in certain circumstances, for example, in a gas, when temperature rises, P decreases, for which speed is faster in hot air

Solid medium helps sound waves to travel the fastest since the molecules inside a solid are closer to one another, allowing better transmission.


Talking about the motion of sound waves through the three phases of mediums (solid, liquid and gas), sound waves chose to be the fastest while travelling through the solid media.

Because in solids, the molecules are stacked closely to one another, allowing the transmission of sound waves faster as compared to the liquids or gases.  In fact in air, the sound waves find clumsy to travel.

Sound waves travel about 17 times faster in steel than through air.  Although there are always some exceptions yet, most of the solids provide better transmission of sound waves as compared to other mediums.

When a force is exerted on an object, does a large force always produce a larger change in the object's momentum than a smaller force does?


yes .because the larger or more amount of pressuer will make moer of a compact . than a smaller one would

Which one of the following is true a. momentum results in a change of force
B. a force results in a change of momentum





You need a specific force to change the momentum of something.

Hope this helps!

Why does the number 54,289.00 have seven significant figures and not five


the 2 spots after the decimal still counts toward the total  the figures 

thought it was 5 at first too. the 00 past the decimal at significant because it's expressing it is exactly to that point. sort of confusing.
say you measured a pencil with a ruler, and say it was 5" long roughly. you can only scientifically put down that the pencil is 5 inches not 5.0000 because your ruler doesn't go that many decimal places. when something is absolute is the only time you can add .0000000000000000000000 to it and it still be correct. an example of something that is absolute is like you have 10 fingers, 10 is absolute because it's exact 10.0000000000000000=10 fingers it's not any more and not any less.
Those two zeros are included after the decimal so they aqre significant. The rule is all final zeros after the decimal are significant
Since there is a decimal point present, start with the leftmost nonzero didgit. Count that digit and every other digit to the right of it.

What is an example of a sport related activity A .Weight lifting B.Soccer C.Jumping rope D.Running A Race


The correct answer is B. Soccer.
Hope this helps and have a good night! :3
sports are games so lets do process of elimination
A.) weight lifting (exercise)
B.) Soccer (sport)
C.) jump rope (exercise)
D.) Running a race (exercise) but questionable 

i would say B.) soccer