Answer:
it is true
Explanation:
i think so
not really sure
The rhinestones in costume jewelry are glass with index of refraction 1.50. To make them more reflective, they are often coated with a layer of silicon monoxide of index of refraction 2.00. What is the minimum coating thickness needed to ensure that light of wavelength 527 nm and of perpendicular incidence will be reflected from the two surfaces of the coating with fully constructive interference
Answer:
t = 6.6 10⁻⁸ m
Explanation:
In this case we have that the reflection in the film is constructive, we take into account that
* When the light is reflected from the air (n = 1) to the film (n=2) it has a phase change of 180º
* within the film the wavelength is modulated by the index of refact
λₙ = λ₀ / n
taking into account these two aspects the expression for constructive interference is
2n t = (m + ½) λ₀
let's find the minimum thickness (t) of the film
t = (m + ½) λ₀ / 2n
for m = 0
t = ½ 527 10⁻⁹ /(2 2.00)
t = 6.6 10⁻⁸ m
Plants cause weathering, too. A seed that falls into a crack in a rock may grow there. Growing roots may push on and enlarge the crack, What is this process called Question 2 options: chemical weathering mechanical weathering root-pry pedalfer
Answer:
c. root-pry
Explanation:
i did the test
The process by which a seed enters a rock fracture and the expanding roots push to widen the fissures is known as mechanical weathering.
What do you mean by mechanical weathering?Machine-induced weathering Mechanical weathering, sometimes referred to as physical weathering and disaggregation, causes rocks to break down. Water, whether liquid or solid, is usually present during mechanical weathering. For instance, liquid water may seep through fractures and fissures in rock.
You may get mechanical weathering from
the reduction in pressure produced on by the removal of subsurface rock.
Water freezes and thaws in the granite's crevices.
Salt crystals are developing inside the rock.
cracking brought on the plant roots and exposed by digging animals
The information is ,
Let's say the weathering looks like A.
Now, plants are to blame since a seed that falls into a fracture in a rock and the seed's expanding roots push and widen the original gap
Weathering from mechanical sources and one mechanical weathering mechanism that fractures rocks is the freezing and spreading of ice in rock cracks.
Moreover, mechanical weathering reduces rocks into microscopic fragments, increasing the surface area of the material as a whole.
Hence, the method is mechanical weathering.
Click here for additional information about mechanical weathering.
https://brainly.com/question/27233034
#SPJ6
What three factors affect the acceleration of an object?
Explanation:
The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased
The three factors are net force, the mass of the object and the direction of the force.
What is acceleration?Acceleration is defined as the rate of change of velocity. It is also defined as the ratio of the net force acting on the body to the mass of the body.
The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. and the direction of the force.
As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.
Therefore three factors are net force, the mass of the object and the direction of the force.
To know more about acceleration follow
https://brainly.com/question/605631
#SPJ2
Pls, help me quick! :( I need a lot of help.
Answer:d
Explanation:
because the brighter the stars look the bigger they look
En un recipiente con mercurio (13.6 gr/cm3) se sumerge completamente un cuerpo de 900 gramos de masa. AL medir su peso aparente este marca 2.94 newton en el dinamómetro. Cual es la densidad del cuerpo (kg/m3)
Answer:
ρ = 20.4 kg / m³
Explanation:
For this exercise we use Archimedes' principle, the thrust on a submerged body is equal to the weight of the released liquid
B = ρ g V_liquid (1)
let's write the equilibrium equation
F -W + B = 0
B = W -F
let's calculate
B = 0.900 9.8 - 2.94
B = 5.88 N
From equation 1
V_{liquid} = [tex]\frac{B}{\rho_{Hg} g}[/tex]
V_{liquid} = [tex]\frac{5.88}{13.6 \ 10^3 \ 9.8}[/tex]
V_{liquid} = 4.41176 10⁻⁵ m³
in this case it is indicated that the body is completely submerged
V_body = V_liquid = V
the definition of density is
ρ = m / V
ρ = [tex]\frac{0.900 \ 10^{-3}}{ 4.41176 \ 10^{-5} }[/tex]
ρ = 2.04 10¹ kg / m³
ρ = 20.4 kg / m³
In one experiment, the teacher determined that the force on the wire was 2.14 mN
The current in the wire was 0.32 A
The length of wire within the magnetic field was 0.048 m
Calculate the magnetic flux density between the two magnets.
Use the Physics Equations Sheet.
Give your answer to 2 significant figures.
Answer:
in ine experiment the teacher determined
Which physical property is defined as the amount of space that matter occupies?
Answer:
The matter has mass and takes up space. The amount of space that matter takes up is called its : density
Answer:
Mass
Explanation:
Mass is the amount of matter occupied by an object.
HELP!!!! WITH THIS PLSSS!!!
Answer:
i cant do your whole assignment for you man
Explanation:
A player prefers to make high passes that lift the puck above the ice. Which stick should the
player choose?
Answer:
i dont know
Explanation:
hello
Why is coal considered a nonrenewable resource? Check all that apply.
Coal is burned to generate electricity.
Coal power plants give off large quantities of smoke and ash.
Coal forms so slowly that we could use up the supply that exists now.
Coal is available in limited amounts.
Answer:
cola forms so slowly that we could use up the supply that exists now
Answer: c and d
Explanation:
What is the unit of energy called? (Give name and symbol)
PLEASE HELLLPP ILL GIVE BRAINLY AND HEART
how does the Gulf stream affect the east coast of the United States?
A ) The Gulf Stream carries cool water along the east coast, causing average temperatures to be cooler than they would be without the current.
B ) The Gulf Stream carries warm water along the east coast, causing average temperatures to be warmer than they would be without the current.
C ) The Gulf Stream carries water along the east coast but the average temperatures are not affected by the current.
D ) The Gulf Stream carries warm water along the east coast but the average temperatures are not affected by the current.
Answer:
B) The Gulf Stream carries warm water along the east coast, causing average temperatures to be warmer than they would be without the current.
Explanation:
The east coast of the United States is affected mainly by the Gulf Stream current, which brings warm water from the tropics into higher latitudes. Because warmer water evaporates faster, putting more moisture into the air, the current serves to increase the humidity of the air along the coast.
Answer:
I think the answer is B fell free to correct me if im wrong.
A 1610 kg car is traveling east at 22. m/s and a 3100. kg minivan traveling west at a speed of 11.0 m/s
collide head on. Assuming a completely inelastic collision, what is the velocity in m/s of the “connected”
vehicle after the crash?
Answer:
Im pretty sure its 11 m/s east because it is 22 m/s hitting 11 m/s and the force is harder hitting
Explanation:
im not 100% sure becasue i did this stuff a while ago
A car drives 30 m north in 1.5 seconds and drives 60 east in 2 seconds. What is the average velocity
Answer:
19.2 m/s
Explanation:
From the question,
Velocity = displacement/time = d/t
V = d/t.................................. Equation 1
Average velocity = Total displacement/ total time
Total dispalcement = √(30²+60²) = √4500 = 67.08 m
Total time = 1.5+2 = 3.5 s.
Substitute these value into equation 1
V = 67.08/3.5
V = 19.2 m/s.
Hence the average velocity is 19.2 m/s
The parameter given for the car during transit is 30 m north in 1.5 seconds and drives 60 east in 2 seconds, we want to find the average velocity.
average velocity is 19.2 m/s
Solution
The expression for Average velocity is
Average velocity = Total Displacement/ Total time Taken...............Eqn 1
Total Displacement = √(30²+60²) = √4500 = 67.08 m
Total time = 1.5+2 = 3.5 s.
From the Equation 1
Average Velocity = 67.08/3.5
V = 19.2 m/s.
Therefore, the average velocity is 19.2 m/s
Learn more about average velocity :
https://brainly.com/question/24739297
Which is a disadvantage of using wind as an energy source?
It may be unreliable.
It is not naturally occurring.
It produces a lot of waste.
It generates large amounts of electricity.
Answer:
it produces
Explanation:
a lot of waste
In an ecosystem,disadvantage of using wind as an energy source is that it produces a lot of waste.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
Learn more about ecosystem,here:
https://brainly.com/question/13979184
#SPJ7
PLEASE HELP !!! Which product forms from the synthesis reaction between potassium (k) and iodine (I)?
Answer:
Pottasium iodide (KI)
Explanation:
product of this reaction is KI. this product is an ionic compound.
4) A drag racer starts her car from rest and accelerates at 10.0 m/s² for a distance of 400 m (1/4 mile). (a) How long did it take the race car to travel this distance? (b) What is the speed of the race car at the end of the run?
Answer:
A) s=1/2at^2
t=√(2s/a)=√(2x400)/10.0)=9.0s
B) v=at
v=10.0x9=90m/s
what is magnetic field
Answer:
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field.
Explanation:
Answer:
Explanation:
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. ... Magnetic fields surround magnetized materials, and are created by electric currents such as those used in electromagnets, and by electric fields varying in time.
Which best describes the runners? Garreth and Elisa ran the same distance but not the same displacement, Luigi and Jasmine went the same displacement, and Logan ran faster than Jasmine. Garreth ran farther than Luigi, Elisa and Jasmine went the same distance, and Logan and Jasmine has the same displacement in the opposite direction. Garreth and Elisa ran together, Luigi and Jasmine went the same distance, and Logan and Jasmine have the same displacement in the opposite direction. Garreth ran less than Logan, Elisa and Jasmine went the same displacement, and Luigi and Garreth ran together.
Answer:
The anwser is C, Garreth and Elisa ran together, Luigi and Jasmine went the same distance, and Logan and Jasmine have the same displacement in the opposite direction.
Explanation:
i just took the test and got 100%
Answer:
C or Garreth and Elisa ran together, Luigi and Jasmine went the same distance, and Logan and Jasmine have the same displacement in the opposite direction.
Explanation:
What is the mass of a 50kg object in space with no gravity?
Answer:
The answer would be 0kg.
Your welcome.
Which of the following equations is true?
A Electrons+neutrons=atomic number
B
Electrons+protons=atomic weight
C
Protons+ Neutrons=Atomic weight
Answer:
Protons+ Neutrons=Atomic weight
Explanation:
Of the three subatomic particles, only protons and neutrons have mass. Electrons orbit the nucleus and their mass is negligible.
Answer:
C. Protons + Neutrons = Atomic weight
Explanation:
The total weight of an atom is called the atomic weight. It is approximately equal to the number of protons and neutrons, with a little extra added by the electrons.
define boiling point
Answer:
Max. temp. in which water starts boiling....
Explanation:
eg. at 100 degree células.......
A semi truck has a velocity of 28m/s when it comes to a stop over 342m. What is the acceleration of the truck?
A construction worker transfers 6000000 J in a n 8 hour day of work. What is their average power output? just need a quick answer with the working, thanks
Answer:
208.33 W
Explanation:
Using,
P = W/t.......................... Equation 1
P = Average power output, W = total work, t = total time.
From the question,
Given: W = 6000000 J, t = 8 hours = (8×60×60) = 28800 s
Substitute these values into equation 1
P = 6000000/28800
P = 208.33 W.
Hence the average power output is 208.33 W
Why does it take a long time to start Penicillin production?
Answer:
the growth of mycelial, by which reduction in carbohydrate level occurs in the medium. Because of this reduction in carbohydrate level
Explanation:
hii please help i’ll give brainliest!!
Rose and Joel's children recently moved out to live independently. The couple has been missing their kids and is experiencing the empty-nest syndrome. Which TWO strategies will help them deal with their loneliness? -pursuing a hobby -joining an activity club with like-minded people -calling their children regularly -visiting their children frequently -convincing their children to move in back home with them
Answer:
Joining a club and getting a hobby
Explanation:
Join a club if you want to meet people, and when they choose a hobby it should be more than just gardening, because gardening sucks in the long term and it doesn't fill that gap. I know because my grandma did it and she is still sad.
The public is not yet able to purchase cars powered by hydrogen fuel cells because engineers have to determine how
the cars perform based on which scenario?
O on racetracks
O in real-world conditions
O in flooded environments
O on closed courses
Next
Submit
Save and Exit
return
Answer:
B on EDGE
Explanation:
5) A jet plane lands with a speed of 100 m/s and can accelerate at a maximum rate of -5.00 m/s as it comes to rest (n) From the instant the plane touches the runway, what is the minimum time needed before it can come to rest? (b) Can this plane land on a small tropical island airport where the runway is 0.800 km long?
Answer:
1000 meters, 200 meters
Explanation:
Given: Vi = 100 m/s and a = -5 m/s^2
From uniformly accelerated equation: v = Vi + a t
then substitute
0 = 100 -5 t
t = 20 seconds
to go from 100 to 0 at -5m/s^2
d = Vi (20) - (1/2)(5)(20)^2
d = 100 (20) - 2.5(400)
= 2000 - 1000
= 1000 meters to stop, runs 200 meters beyond the end of the runway into the harbor where he strikes a passenger ferry.
An automobile is sitting on a hill which is 20 m higher than ground level. Find the mass of the automobile if it contains 362,600 J of potential energy