Answer:
pls follow me oo
Explanation:
Step 1: Description of the Usual Method for Determining the Refractive Index of a Rectangular Glass Slab Using a Protractor.
Once the outline of the rectangular glass slab is drawn on the piece of paper (thin lines in the above diagram) and the pins removed, the following steps are carried out (refer to the above diagram):
two straight lines (AB and CD) are drawn with each line passing through one of the pairs of pin holes made by the pins and extended to the surface of the glass slab nearest the position of the two holes; these lines do not extend inside the glass slab; they represent the incident (AB) and emergent (CD) rays;straight lines (EF and GH) are drawn normal to the surfaces of the glass slab that pass through the point where the lines drawn in the previous step intersect the surfaces of the glass slab; these lines are drawn so that they lie outside and inside the glass slab;a straight line (BC) is drawn between each of the points of intersection made by the normal lines drawn in the previous step and the surfaces of the glass slab; this line represents the refracted ray;measure the angle of incidence (angle ABE) which is the angle between the incident ray and the normal that the incident ray makes with the glass surface;measure the angle of refraction (angle CBF or angle BCH) which is the angle between the refracted ray and either of the normals that the incident ray or the emergent ray makes with the glass surface;measure the angle of emergence (angle DCG) which is the angle between the emergent ray and the normal that the emergent ray makes with the glass surface; while this sub-step is not necessary for computing the RI, it is measured to show that the angle of incidence is equal to the angle of emergence and thus that the incident and emergent rays are parallel.
Following these measurements, the refractive index (RI) of the glass is obtained by taking the ratio of the sine of the angle of incidence to that of the sine of the angle of refraction.
This procedure is then repeated for a number of different incident angles to show that the ratio of the sine of the angle of incidence to that of the sine of the angle of refraction should remain constant when a number of different values are used for the incident angle.
Step 2: Description of a Procedure for Finding the Sines of the Angles Made by the Incident and Refracted Rays Without Using a Protractor.
In this procedure it is not necessary to trace the complete outline of the glass slab; only the opposite surfaces through which the light rays travel need be indicated as shown in the above diagram, where the thin lines represent these two surfaces.
The three initial sub-steps of Step 1 are carried out except that Sub-step 1 is modified by extending the lines AB and CD (broken lines) as follows:
extend the incident ray AB forwards so that it cuts the opposite face of the glass slab at point I; this is the path that the incident ray would follow if the glass slab were absent;extend the emergent ray CD backwards so that it cuts the opposite face of the glass slab at point J.
If the incident and refracted rays when extended do not cut the surfaces of the glass slab at points I and J extend the lengths representing these surfaces so that points I and J can be found.
BHCF is a rectangle formed by the surfaces of the glass slab and the normals to the surfaces at points B and C; its diagonal BC represents the path followed by the refracted ray through the glass slab.
From the geometry of the various right-angled triangles in the above diagram, note:
the angle of incidence, angle ABE, is equal to the angle FBI and its sine is equal to the ratio of lengths FI over BI;the angle of emergence, angle DCG, is equal to the angle HCJ and its sine is equal to the ratio of lengths HJ over CJ;the angle of refraction is angle CBF (or angle BCH) and its sine is equal to the ratio of lengths FC over BC (or the ratio of lengths BH over BC).
Thus, without using a protractor or having to work out the sines of angles using a calculator with trigonometric functions (or trigonometric tables), the sines of the various angles needed for calculating the RI of the glass slab can be simply found from measurements of various length.
DNT FORGET TO FOLLOW METB 70 states that to determine acceleration 1 or 2 things must change. What must change for acceleration to occur?
Answer:
Revise
Test
1
2
3
4
5
6
7
Newton’s Second Law
Unbalanced forces
When the forces acting on an object do not balance, the resultant force will cause the object to accelerate in the direction of the resultant force.
In other words, a resultant force on a body will cause it to change its velocity. This simply means that unbalanced forces will cause:
acceleration
deceleration
change in direction
Explanation:
How far would a car traveling at a speed of 35 miles per hour if it traveled for 3 hours?
Answer:
105
Explanation:
Simple math, 35x3=105.
Answer:
105
Explanation:
multiply your time by speed to get distance
What is a 60 kg car's velocity if it has a momentum of 2400 kg m/s?
Answer:
40m/s
Explanation:
momentum = mass * velocity
momentum / mass = velocity
2400kg*m/s / 60kg = 40m/s
Tonya is riding a motorcycle that goes from 30 m/s to 75 m/s in 5s. She is heading south to Florida. What is her acceleration?
References
Review
sign
Mailings
View
Layout
Help
Acceleration Due to Gravity - Free Fall
V=V;+gt
vir initial velocity (m/s)
=final velocity (m/s)
g=gravity (10 m/s2)
t = time (s)
1. What is the velocity of a dropped object after it has fallen
downward for 3.0s?
V=V;+gt
Vi = 0
8 = 10
t = 3
2. A brick is thrown down off a bridge with a velocity of 5 m/s. What
is its velocity after it has fallen for 2 seconds?
I
3. An arrow is launched straight up from the ground. It reaches its
highest point in 6 s. What velocity was it released at?
a b c d
A V=V+gt
dhehehdhehdhshehehehehehe
what are metalloids?
Answer:
a type of chemical element whose properties are intermediate between those of metals and nonmetals.
3. A 900 kg car has a velocity of 22.0 m/s.
a. Find the momentum (p) of the car.
Given:
m=
V=
Unknown:
P=
Solution:
p = mv
(IT IS NOT A Multiple choice question)
Answer:
19800kgm/s
Explanation:
Given parameters:
Mass of car = 900kg
Velocity = 22m/s
Unknown:
Momentum of the car = ?
Solution:
The momentum of a body is the quantity of motion it possess.
So;
Momentum = mass x velocity
So;
Momentum = 900 x 22 = 19800kgm/s
Which of the following concepts helps explain the modern technology used in 3D films?
a. retinal disparity
b. convergence
c. overlap (interposition)
d. stroboscopic movement
Answer:
a.
Explanation:
Fish have gills that-
A. Help regulate body temperature
B. Take in oxygen needed for survival
C. Help maintain balance in the water column
D. Obtain carbon dioxide from water for survival
Answer:
B) Take in oxygen needed for survival
Explanation:
Even though fish can live their lives underwater, they still need oxygen to “breathe”
As particles of matter move faster, an object's
increases.
particle arrangement
temperature
O particle attraction
O potential energy
Answer:
temperature
Explanation:
The movement of particles in an object is directly proportional to the temperature of the object. As the temperature increases, the kinetic energy increases too. This makes the last option (potential energy) incorrect.
The increased kinetic energy results to particles moving farther from each other, which means the particle attraction becomes weaker. This makes the third option (particle attraction) incorrect.
The particle arrangement shows the particles being widely separated. Therefore the arrangement decreases because they become less intact. This makes the first option (particle arrangement) incorrect.
Select the community facility which typically has a variety of offerings for physical activity like team sports, exercise classes, and swimming.
Bowling Alley
Golf Course
Skate Park
YMCA
Answer:
YMCA
Explanation:
i know everything ;)
Answer: It should be YMCA if im not wrong i took the test a while back.:)
Explanation:
I need help!!! What is the answer!!
Answer:
A I think hope it helps!!
Please I need help with this question (see image).
Show workings where necessary.
Answer:
I think the reason why ice is forming on the aluminium lumps and not the beaker, is because:
The beaker is already on the same temperature as the mixture inside it: as a result, there is no heat transfer.
on the other hand, the Aluminium Lumps is at a way lower temperature than the mixture and as a result, there is heat transfer from the water around the lumps to the aluminium Lumps itself.
turning the water into ice.
Heat is lost from the water, and gained on the aluminium.
Since the water was turned to ice.
we can say that the final temperature of the heat transfer process is 0°C.
Notice that we'll be making use of the latent heat of fusion for ice. since water is being converted to ice at 0°C.( workout is in above attachment)
Most energy obtained from water is converted from _____.
groundwater
tidal generators
waterfalls
potential energy behind dams
Answer: potential energy behind dams
Explanation:
groundwater, tidal generators, and waterfalls don't produce enough kinetic energy.
Find an everyday situation that involves density or buoyancy and explain it.
Answer:
Explanation:
Swimming. When you go swimming, your body floats but somewhat sinks as well because we weigh less when we're in the water. We are less dense.
Or taking a bath, the soap sinks to the bottom and the washcloth somewhat floats and sinks because of the air trapped in the middle. But the rest of the washcloth is sinking because it's absorbed the water which makes it denser.
Brainliest??
Which has more kinetic energy, a basketball rolling at a walking pace or a baseball rolling at the pace of someone running? How could we find out ?
Answer:
answer 2 because the baseball has less mass then the 1st one
A mixture of 5 cm3 of CH4 and 100 cm3 of air is exploded. Assume air is 80% N2 by volume and 20% O2 by volume. The resulting mixture is cooled. All volumes are measured at room temperature and pressure.
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)
What is the composition of the resulting gas?
Answer:
The composition of the resulting gas;
A. 5 cm³ of CO₂, 10 cm³ of O₂, 80 cm³ of N₂, and 10 cm³
Explanation:
The given parameters are;
The volume of CH₄ in the mixture of air and methane = 5 cm³
The volume of air in the mixture of air and methane = 100 cm³
The percentage by volume of nitrogen, N₂ in the air = 80%
The percentage by volume of oxygen, O₂ in the air = 20%
The equation for the reaction of the chemical reaction between the methane and the air in the mixture is given as follows;
CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l)
Therefore, we have;
1 mole of CH₄ reacts with 2 moles of O₂ to produce 1 mole of CO₂ and 2 moles of H₂O
By Avogadro's law, we have that equal volumes of all gases at the same temperature and pressure contains equal number of molecules
Therefore, we have;
1 cm₃ of CH₄ reacts with 2 cm³ of O₂ to produce 1 cm³ of CO₂ and 2 cm³ of H₂O
From which we have;
5 cm₃ of CH₄ reacts with 10 cm³ of O₂ to produce 5 cm³ of CO₂ and 10 cm³ of H₂O (steam)
The volume of the oxygen used in the reaction = 10 cm³
The volume of oxygen present in the air = 20% × 100 cm³ = 20 cm³
The volume of nitrogen present in the air = 80% × 100 cm³ = 80 cm³
Therefore, the composition of the resulting gas is given as follows;
1) 80 cm³ Nitrogen
2) 10 cm³ Oxygen
3) 5 cm³ CO₂
4) 10 cm³ H₂O
The final composition of all the gases in the mixture has been [tex]\rm 80\;cm^3[/tex] Nitrogen, [tex]\rm 10\;cm^3[/tex] oxygen, [tex]\rm 5\;cm^3[/tex] carbon dioxide, and [tex]\rm 10\;cm^3[/tex] water (steam). Thus, the correct option is A.
The mixture of air has been composed of 20 % oxygen and 80 % nitrogen. The volume of air has been [tex]\rm 100\;cm^3[/tex]. Thus, the volume of oxygen and nitrogen in the air has been:
The volume of oxygen, [tex]V_O_2=20\;\rm cm^3[/tex]
The volume of nitrogen, [tex]V_N_2=80\;\rm cm^3[/tex]
Since the reaction, the nitrogen has been remained unused, thus the final composition of nitrogen has been [tex]\rm 80 \;cm^3[/tex].
The balanced equation for the reaction of methane with oxygen has been:
[tex]\rm CH_4\;+\;2\;O_2\;\rightarrow\;CO_2\;+\;2\;H_2O[/tex]
According to Avogadro's law, the presence of gases at the same temperature has volume proportional to the moles of the gases.
Thus, from the balanced chemical equation:
[tex]\rm 1\;cm^3\;CH_4=2\;cm^3\;O_2[/tex]
Thus,
[tex]\rm 5\;cm^3\;CH_4=10\;cm^3\;O_2[/tex]
Since the available oxygen has been [tex]\rm 20\;cm^3[/tex], the remaining oxygen after the reaction has been [tex]\rm 10\;cm^3[/tex].
Thus, the final composition of oxygen has been [tex]\rm 10\;cm^3[/tex].
Methane has been the limiting reactant. Thus, the concentration of carbon dioxide and water formed has been:
[tex]\rm 1\;cm^3\;CH_4=1\;cm^3\;CO_2\\5\;cm^3\;CH_4=5\;cm^3\;CO_2[/tex]
The final composition of carbon dioxide has been [tex]\rm 5\;cm^3[/tex].
[tex]\rm 1\;cm^3\;CH_4=2\;cm^3\;H_2O\\5\;cm^3\;CH_4=10\;cm^3\;H_2O[/tex]
The final composition of water (steam) has been [tex]\rm 10\;cm^3[/tex].
The final composition of all the gases in the mixture has been [tex]\rm 80\;cm^3[/tex] Nitrogen, [tex]\rm 10\;cm^3[/tex] oxygen, [tex]\rm 5\;cm^3[/tex] carbon dioxide, and [tex]\rm 10\;cm^3[/tex] water (steam). Thus, the correct option is A.
For more information about the composition of gas, refer to the link:
https://brainly.com/question/4391235
I need help with this
Answer:
position 1 and 4................
A 100w lightbulb is on for 30 seconds. How much energy was transferred?
A student rides a bicycle for 15 miles in 3 hours. What is the student's speed? What else would you need to know for Velocity?
Answer:
5 miles per hr.
Explanation:
15/3=5 miles 3/3=1 hour
not too sure about velocity bruddah.
Answer:
11 minutes 60 seconds per mile
7 minutes 27.39 seconds per kilometer
5 miles/hour
8.05 kilometers/hour
134.11 meters/minute
2.24 meters/second
Explanation:
5 miles per hour :)
Complete the sentence with the word "element" or "compound."
O is a(n) ____
and H2O2 is a(n) ____
.
Answer:
"element"= There are four basic sentence patterns based on sentence construction element
Answer:
1st one. Element
2nd one. Compound
Explanation:
Describe how you would draw a diagram that shows the electric field between two particles that
attract each other.
Answer:
draw the two atomic structures and then focus in on the electrons either gaining or losing and draw them with arrows and dots
Explanation:
i got a 5/5
20 characters
What is a positive component of Heath called:
Answer:
vegetables food, sport sport sport
Explanation:
????!!!!
Why is training important?
Please Help Me!!!!!!
Answer:
a.
Explanation:
a stone of 1kg is thrown with a velocity of 20m/s and comes to rest after travelling a distance of 50 m. calculate the force exerted on the object.
Answer:
Force = -4N
Explanation:
Given the following data;
Mass = 1kg
Initial Velocity = 20m/s
Distance = 50m
To find the acceleration;
We would use the third equation of motion;
Since, it comes to rest, its final velocity is zero (0).
V² = U² + 2as
Substituting into the equation, we have;
0 = 20² + 2*a*50
-400 = 100a
a = -400/100
a = -4m/s²
Now to find the force exerted
Force = mass* acceleration
Force = 1*(-4)
Force = -4N
A 1,100 kg car comes uniformly to a stop. If the vehicle is accelerating at 1.2 m/s", which
force is closest to the net force acting on the vehicle?
Answer:
Gravitaitional pull
Explanation:
Guessing
in a hydraulic press, a force of 20N is applied to a piston of 0.20m2 what is the pressure transmitted through the liquid?
Answer:
,
Explanation:
When an unbalanced force acts on an object
Answer:
What is the question?
Explanation:
I can help you but if you ask!
approaching a dangerous intersection the driver slows her car from 40 meters per second to 15 meters per second in 5 seconds what is the acceleration
Answer:
- 5 m/s^2
Explanation:
Givens
vi = 40 m/s
vf = 15 m/s
t = 5 seconds
Formula
a = (vf - vi)/t
a = (15 - 40)/5
a = -25/5
a = - 5 m/s^2
Don't be bothered by the minus sign. It just means she is slowing down.