Answer:
i) The angle of refraction is approximately 19.47°
ii) The angle of the incident light should be approximately 61.85°
Explanation:
Snell's law for the relationship between the angle of incident and the angle of refraction of light is given mathematically as follows;
n₁·sin(θ₁) = n₂·sin(θ₂)
i) The characteristics of the glass are;
The refractive index of the glass, n₂ = 1.50
The angle of incident of the light ray in air, θ₁ = 30°
The refractive index of air, n₁ = 1
Let 'θ₂' represent the angle of the light refracted by the glass, by Snell's law we have;
1 × sin(30°) = 1.5 × sin(θ₂)
∴ sin(θ₂) = 1 × sin(30°)/1.5 = 1 × 0.5/1.5 = 1/3
θ₂ = arcsin(1/3) ≈ 19.47°
∴ The angle of refraction, θ₂ ≈ 19.47°
ii) When the angle at which the light incident from air emerges in the glass is 36°, we have;
The angle of refraction of the light through the glass, θ₂ = 36°
The refractive index of the glass remains, n₂ = 1.50
The refractive index of air, n₁ = 1
Let 'θ₁' represent the angle of the incident light, we get;
1 × sin(θ₁) = 1.5 × sin(36°)
∴ sin(θ₁) = 1.5 × sin(36°) = 1.5 × √(10 - 2·√5)/4
θ₁ = arcsin( 1.5 × √(10 - 2·√5)/4 ) ≈ 61.85°
The angle of the incident light should be, θ₁ ≈ 61.85°.
PLEASE HELP! ASAP
In which reaction is there a transformation of mass into energy?
A. Uranium breaks apart into krypton, barium, and three neutrons.
B. Sodium combines with chlorine to form sodium chloride.
C. Hydrogen combines with oxygen to form water
D. Ammonium nitrate breaks down into dinitrogen monoxide and
water
Explanation:
Specifically, small amounts of mass are turned into energy from the breaking up (fission) or combination (fusion) of the nuclei of atoms. Even spontaneous radioactive decay converts a bit of mass into incredible amounts of energy.
Answer:
A. Uranium breaks apart into krypton, barium, and three neutrons.
Explanation:
did the test !!
Using the diagram below, identify the correct chemical formula for the molecule shown.
Answer:
is the firts one because i due it in jannuary i will know all answer
Explanation:
A ball is thrown at 60 degrees and lands in 18.5 seconds what is the velocity of the ball at the start
Answer:
the initial velocity of the ball is 104.67 m/s.
Explanation:
Given;
angle of projection, θ = 60⁰
time of flight, T = 18.5 s
let the initial velocity of the ball, = u
The time of flight is given as;
[tex]T = \frac{2u\times sin(\theta)}{g} \\\\2u\times sin(\theta) = Tg\\\\u = \frac{Tg}{2\times sin(\theta)} \\\\u = \frac{18.5 \times 9.8}{2\times sin(60^0)} \\\\u = 104.67 \ m/s[/tex]
Therefore, the initial velocity of the ball is 104.67 m/s.
study the symbol below .draw it your answer sheet and then the question that follow.
1.what does the symbol suggest?Explain.
2.which 3R`s should be done first and the most often:Reduce and Reuse or Recycle?which follows next and which should be done last
Answer:
Part A
Please find attached the required drawing created with Microsoft Visio
Part B
1. The symbol (from a similar question) suggest the steps used to conserve resources
2. i) Reduce
ii) Reuse
iii) Recycle
Explanation:
1. The symbol suggests that in order to maintain sustainable use of our natural resources we can conserve them reducing waste, making use of reusable products, and recycling items to produce new items
2. i) The conservation step to be done first in the 3R's is Reduce
The natural resources can be conserved by reducing the amount of waste produced and also reducing the usage of non renewable natural resourced
ii) The next conservation step is to follow after it is no longer possible to reduce wastage is Reuse
There are several items that can be made use of for other purpose after they have been used including, water, bags for shopping, reusable nose masks
iii) The item which should be done last is Recycle
To recycle is to process used materials to create other items which can then be used as new items
Examples include;
Iron, Plastics, glass, paper, tires, and electronics
If I was floating in space, why would a scale read my weight as "0"?
Answer:
No external contact force.
Explanation:
Mass is defined as the amount of material an object contains, that doesn't change whether the object it on earth, on the moon or anywhere in space. Except the only force that is acting upon the body in gravity and they don't feel gravitational attraction towards the earth.
PLEASE HELP!!!!
An electron is located 4.22 mm away from an isolated proton. If the distance between the two particles is increased to 8.44 mm, what
happens to the electrical potential energy of the electron and why?
O A. The electrical potential energy will increase because work must be done to separate two particles that attract one another.
B. The electrical potential energy will remain the same because the electron and proton are both fundamental particles and their
charge cannot be changed.
O
C. The electrical potential energy will increase because larger energies are associated with greater distances.
O D. The electrical potential energy will decrease because no work is necessary to increase the distance between particles that
demonstrate attraction.
You can download answer here
tinyurl.com/wpazsebu
If the distance between the two particles is increased to 8.44 mm, the electrical potential energy will increase because work must be done to separate two particles that attract one another. Hence option(A) is correct.
What is potential energy?Potential energy is the energy held by an object as a result of its position relative to other objects, internal stresses, electric charge, or other factors.
The gravitational potential energy of an object, the elastic potential energy of an extended spring, and the electric potential energy of an electric charge in an electric field are all examples of common types of potential energy. The joule, denoted by the symbol J, is the unit of energy in the International System of Units (SI).
The positive and negative charges attract each other, so work must be done to separate two particles. Hence, the electrical potential energy will increase.
Learn more about potential energy here:
https://brainly.com/question/24284560
#SPJ2
The work per unit charge required to move a charge between two points in an electric circuit defines electric
A) force
B) Power
C) field strength
D) potential difference
The work per unit charge required to move a charge between two points in an electric circuit electric potential difference. The right option is D) potential difference
What is electric potential difference?Potential difference can be defined as the work done in moving a unit charge from one point to another in an electric field. The S.I unit of potential difference is volts (V).
From the question,
Force: is the product of mass and acceleration Power: This is the rate at which work is done.Field strength: This is the force per unit charge in a field.Potential difference: This is the work done in moving a unit charge from one point to another in a field.Hence, from the above, the right option is D) Potential difference
Learn more about potential difference here: https://brainly.com/question/24220726
Which of the following elements is NOT considered a halogen?
-Bromine (Br)
-Chlorine (Cl)
-Fluorine (F)
-Argon (Ar)
Answer:
Argon
Explanation:
Halogens are elements within group 17 on the periodic table. As argon is in group 18, which means it is a noble gas. Bromine, chorine, and flourine are all in group 17, making them halogens.
Angela is sitting on a slide. As she is sitting at the top of the slide, Angela has
energy
However, when she begins to go down the slide, she will have
energy
OA. potential; kinetic
OB. kinetic; potential
OC. electrical; chemical
OD. chemical electrical
PLEASE HELP THIS IS TIMED
Answer:
OA. potential; kinetic
Explanation:
I'll mark brainliest if you help me. :)
Answer:
gravitational potantional energy
Explanation:
ill try to link a source!
edit: https://flexbooks.ck12.org/cbook/ck-12-middle-school-physical-science-flexbook-2.0/section/14.3/primary/lesson/potential-energy-ms-ps#:~:text=Potential%20energy%20due%20to%20the,is%20called%20gravitational%20potential%20energy.
The resistance to the motion of an object is
Answer:
Inertia
Explanation:
Part of Newton's Laws of Motion
how many minutes till 8:5 to 12:50
Answer:
4:10
Explanation:
I NEED HELP ASAP
A worker sits at one end of a rod that is 2.80 m long. A weight of 107 N is placed at the other end of the rod. The rod is balanced when the pivot is 0.670 m from the worker.
Answer:
Let the weight of the worker represented by X newton there is a normal force exerted at a distance of 0.67 cm
Explanation:
The weight of the worker which is at a balanced state when the pivot is 0.670 m from it is 447.1 N.
What is Torque?
Torque is a twisting force which speaks to the engine's rotational force and it also measures how much of that twisting force is actually available when an engine exerts itself.
For equilibrium , net torque = 0
Taking clockwise direction positive,
W × (-0.670) + 107N × 2.80 = 0
W × (-0.670) = -299.6
W = -299.6/ -0.670
W = 447.1 N
Therefore, the weight of the worker is 447.1 N.
Learn more about Weight here:
https://brainly.com/question/10069252
#SPJ2
Your question is incomplete, most probably the complete question is:
A worker sits at one end of a rod that is 2.80 m long. A weight of 107 N is placed at the other end of the rod. The rod is balanced when the pivot is 0.670 m from the worker. Calculate the weight of the worker.
A toy helicopter begins flying across a field with a speed of 1 m/s and an
acceleration of 0.5 m/s2. How long does it take the helicopter to reach a
speed of 4 m/s?
is corona the least dense layer in the sun? please fast
Answer:
the Corona is about 10 million times less dense than sun's surface.this low density makesuch less bright than surface of the sun
Answer:
dude the ans no corona,
Explanation:
It cannot survive in space let alone be one of the layer of the sun due to its high temperature ( that is 2million fahrenheit )
5/100 is the same value as
Answer:
5/100 =120=0.05or 5%
Explanation:
I had this same thing this morning
HELP MEEEEEEEE PLEASEEEE
A) Compare the difference in the forces of impact for each of two helmets dropped form the same height in figure 2 and explain what this
difference suggests about the amount of time the force is applied to each helmet during the collision. Keep in mind that each helmet has
the same mass and that the crash pads slow down the helmets as they hit. You may use equation Fat mavto support your answer.
B) Explain why the relationship between force and time is important to a helmet designer.
During a collision, a skater will suddenly come to a complete stop. This is a foam of acceleration. A helmet can change the amount of
acceleration and the amount of force that a skater experiences during a collision
C) Compare two helmets in figure 3 and explain how helmet shape changes both the force and the acceleration on a skater's head, as the
skater hits the wall of the rink, using the formula Fema.
BI
SS.
Answer:
B Explain why the relationship between force and time is important to a helmet designer.
During a collision, a skater will suddenly come to a complete stop. This is a foam of acceleration. A helmet can change the amount of
hope you get a good grade
A screen door spring is stretched
0.299 m, and exerts a 64.7 N force
on the door. What is the spring
constant of the spring?
(Unit = N/m)
Answer:
216.39 N/m
Explanation:
F = 64.7 N
x = 0.299 m
Plug those values into Hooke's Law:
F = kx
64.7 N = k(0.299 m)
---> k = 216.39 N/m
what is the velocity of a 1200 kg boat with a kinetic energy of 160,000 J
Which statement best explains the difference between greenhouse gases and other atmospheric gases?(1 point)
Greenhouse gases trap thermal energy and reflect the sun’s harmful radiation back to Earth.
Greenhouse gases allow thermal energy to pass through the atmosphere and back out into space.
Greenhouse gases reduce the amount of natural resources on Earth.
Greenhouse gases account for the direction in which water and air move.
Greenhouse gases trap thermal energy and reflect the sun’s harmful radiation back to Earth is the answer
im not 100% sure tho
hope it helps:))
A person is listening with his ear against the rail for an oncoming train. When the train is 1.65 km away, how long will it take him to hear the sound of the whistle?
Answer:
Time = 0.317 seconds.
Explanation:
Given the following data;
Distance = 1.65km to meters = 1.65 * 1000 = 1650 meters
We know that the speed of sound in steel is equal to 5200m/s
To find the time to hear the sound of the whistle;
Time = distance/speed
Substituting into the equation, we have
Time = 1650/5200
Time = 0.317 seconds.
Therefore, it will take him 0.317 seconds to hear the sound of the whistle.
what is the net force of 125N and 275N
That all depends on the ANGLE between the two forces.
It can be anything from a minimum of 150N (if they point in exactly opposite directions) to a maximum of 400N (if they point in exactly the same direction).
How is the velocity of a wave affected by its frequency, wavelength, and period?
Answer:
I can only explain using the formula
Explanation:
v=f
[tex]v = f \times lamda[/tex]
v is velocity
f is frequency
lamda is wavelength ( I don't have the symbol)
therefore velocity is the product of frequency and wavelength
And since period is the inverse of frequency;
Period (T)=1/f
so we can have v=lamda/T
That's what I think
Which statement about the carbon cycle is most true?
A. Energy is destroyed when organic matter decays.
B. The total mass of carbon on Earth is always increasing.
C. Carbon is lost from the cycle when it enters the atmosphere.
D. Carbon changes form, but the total amount on Earth remains the same
What is a scientific model?
Answer:
A scientific model is a physical and/or mathematical and/or conceptual representation of a system of ideas, events or processes. Scientists seek to identify and understand patterns in our world by drawing on their scientific knowledge to offer explanations that enable the patterns to be predicted.
Answer:
D
Explanation:
Can someone pls help me with this?
Answer:
17 - length of the fork
18 - number of turns
19 - material of the fork
Explanation:
it's a quarter and a half basically an amount of it it's actually the measurement of your actually doing and the size and the programs and you should basically do the l up and the l down just another kid information from it so this is what it goes from
A boat is rowed perpendicular to the shore of a river that flows at 3.0 m/s as shown in the
figure. The velocity of the boat is 4.0 m/s relative to the water. What is the magnitude of the
velocity of your boat relative to the shore?
A-5 m/s
B-10 m/s
C-15 m/s
D-20 m/s
Which of the following are global winds?
O jet streams, trade winds, and Coriolis effect
O jet streams, polar easterlies, and trade winds
jet streams, sea breezes, and trade winds
O jet streams, breezes, and Coriolis effect
The correct and is A or jet streams, trade winds, and Coriolis effect
Answer:
2. Jet streams, Polar Easterlies, and Trade winds
Explanation:
It isn't one because the Coriolis effect is an effect or something that causes something else. (it causes things to curve like other winds and stuff) Not three because Sea breezes are winds that travel short distances, occur at night, at the beach, Not for because it also has Coriolis effect and it also has breezes for some reason. So, your answer will be 2.
Hope this helped!
Stay safe!
1. What is a cast? How is a cast formed?
Answer:
a cast is something that holds a item in place weather it be a iron sword or a broken arm. a cast is made by hollowing out the inside and placing your item in it.
Explanation:
Is this right?? Please help me. IT IS SOCIOLOGY!