linear expansivity?

Answers

Answer 1

Linear expansivity, area expansivity and volume or cubic expansivity are


Related Questions

please help!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer: I'm sure the answer is a.

Explanation: I hope that helped you.

Answer:

Precipitate

Explanation:

Once the offense comes to the line of scrimmage in one formation, it cannot change to another formation true or false

Answers

Answer:

False.

Explanation:

This question refers to the rules of American Football. Thus, the line of scrimmage is an imaginary boundary that is established between both teams, to which the offensive line and the defensive line go to start the play.

In this situation, the offensive team must have 7 players in its formation, but within this some players can perform certain movements, with which it is incorrect to say that the formation cannot be modified, since it is constantly seen as some players, such as wide receivers, for example, move during scrimmage formation.

Is a ball a wheel and axle if so how do you calculate the Mechanical Advantage of the ball? If not what kind of simple machine is a ball?

Answers

that is correct to be honest

how much power is needed to produce 500 joules of work if 20 watts are used?

Answers

350 produce hope this helps
Answer:25 produce
I might be wrong

An acorn falls 10 meters in 4 seconds. What is its average velocity?

Answers

Answer:

Average velocity, V = 2.5m/s

Explanation:

Given the following data

Displacement = 10m

Time = 4secs

Average velocity can be defined as the rate of change in displacement with time. Velocity is a vector quantity and as such it has both magnitude and direction.

Mathematically, average velocity is given by the equation;

[tex]Velocity = \frac{displacement}{time}[/tex]

[tex]V = \frac{d}{t}[/tex]

Substituting into the above equation;

[tex]V = \frac{10}{4}[/tex]

Average velocity, V = 2.5m/s

which of the following best represents force?
1-a push or a pull acting on a object.
2-a push or a pull always causing acceleration.
3-a push or a pull action without an object.
4-a push or a pull always causing motion

Answers

Answer:

1 -a push or a pull acting on a object.

Explanation:

force is a push or pull acting upon an object as a result of its interaction with another object.

pls help me i need both answers pls help me this is being timed.

Answers

Answer:

it would have to be diagram C OR B

What does a horizontal line on a position time graph indicate

Answers

A horizontal line means the object is. not changing its position it is not moving, it is at rest.

Answer:

horizontal lines on any chart is where the y axis values are equal.

Which object might have the pattern of magnetic domains shown in the
image?
114 114
114 114
11 11
A. Cotton fabric near a magnet
O B. A piece of iron, not near a magnet
O C. A piece of iron near a magnet
D. Cotton fabric, not near a magnet

Answers

Answer: a piece of iron near a magnet

Explanation:

Si se hace avanzar un carro de 200 kg de masa desde el reposo aplicando una fuerza de 800 N. Calcular a) Su aceleración. b) La velocidad final del carro.

Answers

Explicación:

a) Según la segunda ley de movimiento de Newton;

Fuerza = Masa * aceleración

Dado

Masa del coche = 200 kg

Fuerza aplicada = 800N

aceleración = Fuerza / Masa

aceleración = 800/200

aceleración = 4m / s²

b) Para que obtengamos la velocidad final del automóvil, necesitaremos el tiempo.

Suponiendo que el tiempo necesario es de 2 segundos

Sabemos que aceleración = velocidad / tiempo

velocidad = aceleración * tiempo

velocidad = 4 * 2

velocidad = 8 m / s

Por lo tanto, la velocidad final será de 8 m / s si el tiempo es de 2 s.


Which of the following non-metals is used as a lubricant in powdered form?
a) Sulphur
b) lodine
c) Graphite
d) Silicon​

Answers

Answer:

Graphite.

Explanation:

Graphite: "a gray crystalline allotropic form of carbon which occurs as a mineral in some rocks and can be made from coke. It is used as a solid lubricant, in pencils, and as a moderator in nuclear reactors."

A 8,000 kg amazon truck carrying a 3000 kg package is moving at 20 m/s along a level road as shown to the left. The driver applies the brakes to slow down. The truck travels 50 meters while applying the brakes for 3.0 seconds. The package does not slide on the back of the truck. a) Calculate the rate of acceleration b) Calculate the minimum coefficient of friction between packages and the truck

Answers

Answer:

(a) -6.67 [tex]m/s^2[/tex]

(b) 0.68

Explanation:

Given that the mass of the truck, [tex]m_1=8000[/tex] kg.

Mass of the package, [tex]m_2=3000[/tex] kg.

As the package does not slide, so the acceleration of both, truck as well as the package, is the same.

Let [tex]a\;\; m/s^2[/tex] is the acceleration of the combined mass, m.

[tex]m=m_1+m_2= 8000+3000=11000[/tex] kg.

The initial velocity of the combined mass, u= 20 m/s.

Time required to stop, t=3 seconds.

Final velocity, v=0.

Displacement traveled, s=50 m.

(a) As  [tex]a=\frac {v-u}{t}[/tex]

[tex]\Rightarrow a=\frac{0-20}{3}=-\frac{20}{3} =6.67 m/s^2[/tex]

Hence the acceleration of the truck is [tex]-6.67 m/s^2.[/tex]

(b) Now, [tex]a=-6.67 m/s^2[/tex] is the acceleration of the package, this acceleration is due the frictional force, f.

Due to inertia, on application of break, the package have tendency to slide to left (in  the direction of velocity). But the package does not slides, this is only due to the frictional force, f, which acts in the right direction ( opposite to the direction of velocity).

So, the magnitude of frictional force required on [tex]m_2[/tex]  to avoid slide is

[tex]f=|m_2a|=\frac{20}{3}m_2\times(i)[/tex]

Now, let \mu be the minimum coefficient of the friction, so

The force due to friction, [tex]f_r= \mu N[/tex],

where [tex]\mu N[/tex] is the normal reaction.

[tex]N=m_2g[/tex], where g is the acceleration due to gravity.

So, [tex]f_r=\mu m_2g\cdots(ii)[/tex]

To avoid slide, [tex]f_r\geq f[/tex]

[tex]\Rightarrow \mu m_2g\geq\frac{20}{3}m_2[/tex] [from (i)and (ii)]

[tex]\Rightarrow \mu\geq \frac{20}{3\times 9.81}[/tex]    [tex][ as \;g=9.81 m/s^2][/tex]

[tex]\Rightarrow \mu \geq 0.68[/tex]

Hence, the minimum value of coefficient of friction between packages and the truck os 0.68.

Attachment Lab:Conservation of Linear Momentum

Answers

Answer:

This is what I got the teacher hasn’t graded it yet so sorry if it’s not right

Explanation:

A student tries to measure the period of a pendulum that is already swinging

left and right. At the moment when the pendulum is fully to the left, she

counts 'One' and starts a stopwatch. She counts successive swings each time

that the pendulum returns to the left. When she counts ‘Ten' she stops the

stopwatch, and sees that it reads 12.0 s.

a. What was her mistake?

______________________________________________________________

b. What is the period of swing of this pendulum?

______________________________________________________________

c. In this particular experiment, explain the likely effect of her reaction time

on her answer.

Answers

Answer:

a. The student's mistake was that the student did not swing the pendulum and start the watch at the same time.

b. 1.2 s per swing.

c. The likely effect of her reaction time is that they will should subtract two seconds off the time.

Explanation:

The pupil made the error of not simultaneously starting the watch and swinging the pendulum.

What is pendulum?

Pendulum is defined as a body that is suspended from a fixed point and moves back and forth while being pulled by gravity. The pendulum is used to gauge the gravitational pull because the force of gravity causes it to swing back toward its average position. A pendulum's time period can be used to tell the time because it is constant.

The swing of the pendulum is 1.2 sec. per swing. They should take two seconds off the timing due to her presumably slow reaction time. A pendulum's total time should be divided by the quantity of oscillations in order to determine its time period. When compared to a pendulum with a shorter string, the one back and forth cycle of a longer-stringed pendulum requires more time to complete.

Thus, the pupil made the error of not simultaneously starting the watch and swinging the pendulum.

To learn more about pupil, refer to the link below:

https://brainly.com/question/27874242

#SPJ2

A balloon is rubbed on someone's hair, then placed next to a stream of water. The balloon has an overall negative charge. The water has a neutral charge. What happens to the water


It bends away from the balloon due to induction

It moves away from the balloon due to induction

It moves toward the balloon due

It bends toward the balloon due to induction

Answers

Answer:

If I'm right it bends away

Explanation:

I learned this in class before it was fun to me

A 1250 kg Nascar is at the starting line. The race starts and the car reaches a speed of 30
m/s in 10 seconds. What is the force of the car? (Hint: Remember that acceleration
change in velocity / time.)

Answers

Answer:

force=1250kg * 30m/s+10

Explanation: it's a change in acceleration

Select the correct answer
All of the following will help you safely cool foods EXCEPT:
A After a meal put leftovers in a deep container so the food cools down more slowly.
B Put cold foods away immediately after purchasing.
c.
Nestle a bowl of cold food in a slightly larger bowl of ice during a picnic.
D. Transfer cold foods directly from the refrigerator to the cooler when going out.
If someone knows this answer please help me

Answers

Answer:

I may be a little late, but it's A i got it right on the exam

Explanation:

All of the following will help you safely cool foods except after a meal put leftovers in a deep container so the food cools down more slowly, therefore the correct answer is option A.

What is thermal energy?

It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.

The option that will help you safely cool foods is by putting cold foods away immediately after purchasing, Nestle a bowl of cold food in a slightly larger bowl of ice during a picnic, and Transferring cold foods directly from the refrigerator to the cooler when going out.

The right response is A, option a since all of the options will help you safely cool meals, with the exception of putting leftovers in a deep container after a meal to allow them to cool more slowly.

To learn more about thermal energy here, refer to the link given below ;

brainly.com/question/3022807

#SPJ2

When a toy car is moving across a flat surface, what forces are acting on it (gravity, tension, spring, friction,air,normal,applied)?

Answers

Answer:

I believe gravity is acting on it

this is also for a Digital Electronics class​

Answers

Answer:

Rt = 908.25 [ohm]

Explanation:

In order to solve this problem, we must remember that the resistors connected in series are added up arithmetically.

In this case, R2 and R3 are in series therefore.

R₂₃ = 200 + 470

R₂₃ = 670 [ohm]

Now this new resistor (R₂₃) is connected in parallel with the resistor R4. therefore we must use the following arithmetic expression, to add resistances in parallel.

[tex]\frac{1}{R_{4-23} }= \frac{1}{R_{4}}+\frac{1}{R_{23} } \\\frac{1}{R_{4-23} }=\frac{1}{1800}+\frac{1}{670} \\R_{4-23}=488.25[ohm][/tex]

In this way R₁, R₅ and R₄₋₂₃ are connected in series.

Rt = R₁ + R₅ + R₄₋₂₃

Rt = 150 + 270 + 488.25

Rt = 908.25 [ohm]

Its a bit confusing. Please answer.​

Answers

Answer : c
Because : first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force

Answer:

c is answer ...............

• Which is the following statements describes the interaction between magnetic poles?

Answers

Answer:

Please state the statements in the comment so I can help

The amount of work done to bring an electron (q = −e) from right side of hydrogen nucleus to left side in the k shell is__________. Let the radius (r) of atom is 52 pm a) Zero b) infinity c) Fr d) 2Fr

Answers

Answer:

d) 2Fr

Explanation:

We know that the work done in moving the charge from the right side to the left side in the k shell is W = ∫Fdr from r = +r to -r. F = force of attraction between nucleus and electron on k shell. F = qq'/4πε₀r² where q =charge on electron in k shell  -e and q' = charge on nucleus = +e. So, F = -e × +e/4πε₀r² = -e²/4πε₀r².

We now evaluate the integral from r = +r to -r

W = ∫Fdr

= ∫(-e²/4πε₀r²)dr

= -∫e²dr/4πε₀r²

= -e²/4πε₀∫dr/r²

= -e²/4πε₀ × -[1/r] from r = +r to -r

W = e²/4πε₀[1/-r - 1/+r] = e²/4πε₀[-2/r} = -2e²/4πε₀r.

Since F = -e²/4πε₀r², Fr = = -e²/4πε₀r² × r = = -e²/4πε₀r and 2Fr = -2e²/4πε₀r.

So W = -2e²/4πε₀r = 2Fr.

So, the amount of work done to bring an electron (q = −e) from right side of hydrogen nucleus to left side in the k shell is W = 2Fr

A space rover weighs less on Mars than it does on Earth. Which statement
explains this difference?
A. The rover is farther from Earth,
B. The rover has less mass on Mars.
C. The mass of Mars is less than the mass of Earth.
D. The gravitational constant is smaller on Mars than on Earth.

Answers

Answer:

C.) the mass of mars is less than the mass of earth.

Explanation:

The more mass of the planet, the stronger the gravitational pull is. The rover will seem lighter on mars because there is less gravity pulling it onto the planet.

The mass of mars is less than the mass of earth.

What is Earth?

The more mass of the planet, the stronger the gravitational pull is. The rover will seem lighter on mars because there is less gravity pulling it onto the planet.

Earth, the third planet from the Sun, is the planet where all known life is found. Although the Solar System contains enormous amounts of water, only Earth is home to liquid surface water.

The ocean covers roughly 70.8% of Earth's surface, dwarfing the polar ice, lakes, and rivers. Earth's surface is made up of continents and islands for the remaining 29.2% of its total area.

Therefore, The mass of mars is less than the mass of earth.

To learn more about Earth, refer to the link:

https://brainly.com/question/12041467

#SPJ2

what do you get when you combine helium and carbon

Answers

Answer: oxygen

Explanation: Helium burns into carbon and carbon combines with helium to make oxygen.

Answer:

The internal core collapses, and heats up, until it is hot enough to fuse helium into larger atoms, for instance, by combining three helium atoms into carbon. At this same time, some helium will fuse with that carbon to produce oxygen. ... it becomes essentially a free-for-all for creating heavier and heavier atoms.

Explanation:

Hope this is helpful, Have a Great Day/Night!!

What is potential mechanical energy

Answers

Mechanical energy is the energy that is possessed by an object due to its motion or due to its position.
Mechanical energy IS potential energy+Kinetic energy.

A skater of mass 60 kg has an initial velocity of 12 m/s. He slides on ice where the frictional force is 36 N. How far will the skater slide before he stops?

Answers

Answer:

d = 120 [m]

Explanation:

In order to solve this problem, we must use the theorem of work and energy conservation. Where the energy in the final state (when the skater stops) is equal to the sum of the mechanical energy in the initial state plus the work done on the skater in the initial state.

The mechanical energy is equal to the sum of the potential energy plus the kinetic energy.  As the track is horizontal there is no unevenness, in this way, there is no potential energy.

E₁ + W₁₋₂ = E₂

where:

E₁  = mechanical energy in the initial state [J] (units of Joules)

W₁₋₂ = work done between the states 1 and 2 [J]

E₂  = mechanical energy in the final state = 0

E₁ = Ek = kinetic energy [J]

E₁ = 0.5*m*v²

where:

m = mass = 60 [kg]

v = initial velocity = 12 [m/s]

Now, the work done is given by the product of the friction force by the distance. In this case, the work is negative because the friction force is acting in opposite direction to the movement of the skater.

W₁₋₂ = -f*d

where:

f = friction force = 36 [N]

d = distance [m]

Now we have:

0.5*m*v² - (f*d) = 0

0.5*60*(12)² - (36*d) = 0

4320 = 36*d

d = 120 [m]

true or false communication is important in healthy relationship​

Answers

Answer:

True

Explanation:

If two partners don't communicate they'll grow apart and it may lead to one or the other cheating.

Answer:true

Explanation:


The mechanical advantage of a lever is 4 . what does it mean?​

Answers

Answer:

It means...

Explanation:

The mechanical advantage of a machine is 4. Mechanical advantage MA is the ratio of output (generated by the machine) force to input (applied to the machine) force. So MA = 4 means that for example if you apply 100 N then your machine will multiply that force and generate 400 N.

Answer:

The mechanical advantage of a lever is 4 means that the lever can lift a load which is four times greater than the applied effort.

Hope I helped!

Best regards! :D

~[tex] \text{TheAnimeGirl}[/tex]

A 4,350 kg truck traveling east has a momentum of 26,100kg m/s what's the trucks velocity

Answers

Answer:

6 m/s East

Explanation:

Momentum = Mass . Velocity

26100 = 4350. Velocity

Velocity = 6m/s East

Which of the following is an example of a luminous object?
Dog
Tree
Candle
Moon​

Answers

Answer:

Candle

Explanation:

The moon is an illuminated object, while a candle is a luminous object!

Answer:

Candle

Explanation:

I just took the test

Other Questions
HELP IM REALLY BAD AT MATH! The area of a square is calculated as 4x - 16x+16 square units. What is the length of one side of the square? A. 2x-4B. 4x-2C. 2x+4D. 4x+2 Complete the function to return the factorial of the parameter.def factorial(number)product = 1while number > 0product = product * numbernumber = number - 1productstrNum = input("Enter a positive integer")num = int(strNum)print(factorial(num)) What is the volume of a sphere with a radius of 41.8 in, rounded to thenearest tenth of a cubic inch? Given: m n, x y, and y m. Use the diagram to find the angle measure. Please help! Last question and it was due last night! Will choose brainiest! What was one reason the Mauryan Empire was able to control almost all of the Indian subcontinent?A.It separated itself from the rest of the world.B.It forced its people to become Buddhists.C.It built an extremely large army.D.It had help from Alexander the Great. Go listen to 1k phew (you'll thank me later) Students at sunnyvale Middle School volunteered to work a 2-hour Shift at a car wash fundraiser. The table shows the number of people who worked Each Shift and how many cars they washed.is the relationship between the number of cars washed and the number of workers proportional? Complete the sentence Which branch of government do you feel is the most essential to our way of life?Explain what the branch's powers are, what roles the branch has, and how itcarries out its duties. Give specific examples to support your reasoning why thisbranch is most important. conflict is the main cause of social violence justify this statement I will give brainliest :)Write an equation to represent the following situation.You go to Montgomery's and have $10 to spend.Drinks cost $2, a bag of chips costs $1, and a pack ofgum costs $0.50. If you buy four bags of chips, howmany drinks can you buy?4 + 2x = 102x + 1 = 104 + 2x = 0.501+ 2+ 4 = 10 PLEASE HELP PLEASE i really need help What is a mutual funds Write three expression that are equivalent to the given expression. 24x+20y Which of George Washington's beliefs best explains why he stepped down as leader of the Continental Army? A) He believed family was more important than military service, and he wanted to set that example for all soldiers. B) He knew the Continental Army was not performing as it should, and he stepped down and asked for a more effective leader to take his place. C) He believed in democracy and a government ruled by the people. Even though this was his greatest moment, he didn't want to make himself a king. D) While he was commander in chief of the Continental Army, he lost the majority of his battles, so he stepped down from the position and returned home. Find the equation of a straight line passing through the point (0,1) which is perpendicular to the line y=-2x+2 PLEASE HELP ME! IM CONFUSED! Jill and Katie are making bracelets to sell at The Windmill. They determined that each bracelet would have six beads and four charms.How many bracelets can they sell if they have 80 charms? show all work who were the Americans helped by in the Battle of Saratoga A road is 4/7of a mile long. A crew needs to repave 4/7 of the road. How long is the section that needs to be repaved?Write your answer in simplest form.