Assuming that the ring is small enough compared to the depth of the river to be treated as a point and that depth of the Rhine where the ring goes in is 13.3 mm , what is the area of the largest circle at the surface of the water over which light from the ring could escape from the water
Answers
The area of the largest circle at the surface of the water over which light from the ring could escape is approximately 554.45 square millimeters.
To calculate the area of the largest circle at the surface of the water over which light from the ring could escape, we need to consider the concept of critical angle and total internal reflection.
When light travels from a medium with a higher refractive index to a medium with a lower refractive index, it can be refracted or reflected depending on the angle of incidence.
When the angle of incidence is greater than the critical angle, total internal reflection occurs, and the light is reflected back into the original medium.
In this case, the ring is going into the water, which has a higher refractive index than the surrounding air. Therefore, we need to determine the critical angle for light to escape from the water into the air.
The critical angle (θc) can be calculated using Snell's law:
sin(θc) = n2 / n1
Where n2 is the refractive index of the air (approximately 1) and n1 is the refractive index of water.
The refractive index of water is around 1.33. Plugging in the values, we have:
sin(θc) = 1 / 1.33
θc ≈ 48.75 degrees
Now, we can consider the situation at the surface of the water. The light from the ring can escape into the air if the angle of incidence is less than the critical angle.
To determine the area of the largest circle over which light can escape, we consider a circle centered at the point where the ring enters the water.
The radius of this circle will be the distance from the center of the ring to the point where the light reaches the surface of the water.
Since we are treating the ring as a point, the radius of the circle will be equal to the depth of the water where the ring enters, which is 13.3 mm.
The area of the circle can be calculated using the formula:
Area = π * radius^2
Substituting the values:
Area = π * (13.3 mm)^2
Calculating the result:
Area ≈ 554.45 mm²
Therefore, the area of the largest circle at the surface of the water over which light from the ring could escape is approximately 554.45 square millimeters.
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Related Questions
13. If a 40,000g cannon ball is 35m above the Earth's surface, how much potential energy does the cannon
ball have?
Answers
Answer:
PE = 13734 Joules
Step-by-step explanation:
Formula: PE = m * g * h
Givens
m = 40000 grams
m = 40000 grams * 1kg/1000 grams = 40 kg
g = 9.81
h = 35 m
PE = 40 * 9.81 * 35
PE = 13734 Joules
it bins the particles in the nucleus together
Answers
Answer:
Nuclear forces (forces)
Explanation:
here the file attached
Answers
Answer:
A
Explanation:
Amplitude = height of the wave = 1
Wavelength = 3
They are slightly shifted.
The first statement is the correct one. Don't make me type the whole thing out.
Which describes the electromagnetic force only? Check all that apply. is attractive is repulsive has an infinite range has a very small range produces light produces electricity
Answers
Answer:Electromagnetic force, like all forces, is measured in Newtons. Electrostatic forces are described by Coulomb’s law, and both electric and magnetic forces are covered by the Lorentz force law. However, Maxwell’s four equations provide the most detailed description of electromagnetism.
Explanation:
Answer:
attractive, repulsive, produces light & electricity
Explanation:
edge 2021
one square meter is equal to ten thousandsquare centimetres?
Answers
A cable in which there is 12500 N of tension force supports an elevator. What is the magnitude
and direction of the acceleration of the elevator if its total mass is 1175 kg?
Answers
Answer:
a = 10.638m/s^2 in a vertical direction, up 90 degrees from the x axis
Explanation:
Givens:
F_t = 12500N
w = 1175kg
g = -9.81m/s^2
F = m(a)
F_w = m(g)
So taking the weight of the elevator and multiplying it with gravity we get:
F_w = 1175(-9.81)
F_w = -11526.75N
So since the weight of the elevator and the acceleration of gravity would result in 11526.75N of force down the cable would have the opposite force pulling up 11526.75N but it doesn't it has more force then that so the elevator is producing enough force to defeat gravity and move upwards. So now we take our total force and subtract the force of the weight on the cable.
12500N-11526N = 973.25N
So the elevator after defeating gravity is still producing 973.25N of force upwards. So now we take the equation for force and rearrange it:
F = m(a)
a = F/m
a = 0.828m/s^2
But this is in addition to countering the gravity so add 9.81m/s^2 to this and you get
a = 10.638m/s^2 in a vertical direction, up 90 degrees from the x axis
Express the answer in scientific notation:
5.0 x 10^-7mg + 4 x 10^-8mg
Answers
Answer:
4 * 10^-8 mg = .4 * 10^-7 mg divide and multiply by 10
5.0 x 10^-7mg + .4 x 10^-7 mg = 5.4 x 10^-7 mg
Also 5.4 x 10^-7 mg = 5.4E-7 mg
Consider the pseudo code below. Which is the output when input is "NCUCSIE"? (A) NCUCSIENCUCSIE (B) EISCUCN (C) NCUCSIE (D) EISCUCNEISCUCN
Answers
Consider the pseudo code below, the output when input is "NCUCSIE" is (A) NCUCSIENCUCSIE.
The given pseudo code has a loop that iterates through each character of the given input and constructs a new string by adding each character twice. The output will therefore be a string that has each character repeated twice. For the given input "NCUCSIE", the output will be "NCUCSIENCUCSIE". Here is a step-by-step explanation of how the code works: Take input from the user. In this case, the input is "NCUCSIE".
Initialize an empty string called "result", literate over each character of the input string one by one. For each character, append it to the result string twice using the concatenation operator "+=". When all characters have been processed, the result string will contain each character repeated twice, output the result string. The correct answer for the given question is option (A) NCUCSIENCUCSIE.
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What are the purposes of these items aboard the Voyager probes? • Low-energy particle detector: • Magnetometer boom: • High-gain antenna: • Photopolarimeter: • Cosmic ray:
Answers
Explanation:
1. Low-energy particle detector: This particle detector measures the charged particles of the solar winds.
2. Magnetometer boom: This device measures magnetic fields produced by astronomical bodies.
3. High-gain antenna: A HGA has a narrow radio beam that is used to enhance the strength of signal. They simply amplify the weak signals.
4. Photopolarimeter: This is an instrument that is used to measure the strength and intensity and polarization of reflected light.
Answer:
what they said
Explanation:
if the universe is expanding at the speed of light will we ever be able to see anything beyond what we currently see?
Answers
Nothing can move at speeds more than 300,000 km/s. Only massless particles, like the photons that make up light, are able to move that quickly. because it would need an endless quantity of energy to do so.
Further than the speed of light, what else is there?Thus, somewhat strangely, de Rham claims that the only thing that can travel beyond the speed or light is light itself, but only when it is not in the space vacuum. It is interesting to note that light will never travel faster than 186,282 miles per second regardless of the medium.
What exists beyond the cosmos?By definition, nothing exists outside the universe if it is infinite. The idea of a finite expanding cosmos suggests that there would be a limit or edge dividing it from something further away.
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The Rodriguez family roasted marshmallows over a campfire one night. They noticed that they all had to help carry the logs to the backyard, but only one of them had to sweep up the ashes and carry them away. In other words, the mass of the ashes was much less than the mass of the original logs. The mass of the logs was 10Kg before burning and after combustion, the ashes had a mass of 1Kg
Write a CER for this please!
Answers
The total mass of the system after combustion is therefore 1Kg (ashes) + 9Kg (gases and water vapor) = 10Kg, which is the same as the total mass before combustion.
What is law of conservation of mass?Therefore, if the mass of the logs before burning was 10Kg, the total mass of the system before combustion was 10Kg (logs) + 0Kg (oxygen) = 10Kg. After combustion, the mass of the ashes was 1Kg, so the mass of the remaining gases and water vapor released into the atmosphere was 10Kg - 1Kg = 9Kg.
What are the three laws of energy conservation?There are three fundamental quantities in mechanics that are conserved. These are power, forward motion, and angular momentum.
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Based on the information in the table, choose whether the magnetic field is weak or strong
Current Number of Coils Magnetic Field Strength 0. 2 A Many _______________
5. 0 A Many _______________
5. 0 A Few _______________
put weak or strong in the blanks
Answers
Answer:
Explanation:
Field characteristics
The strength of the field at the Earth's surface ranges from less than 30 microteslas (0.3 gauss) in an area including most of South America and South Africa to over 60 microteslas (0.6 gauss) around the magnetic poles in northern Canada and south of Australia, and in part of Siberia.
The period of a wave is 20 ms (milliseconds) and its wavelength is 4 cm. Calculate:
a) The frequency of the wave
b) The velocity of the wave.
Answers
Answer:
A. 50 Hz
B. 2 m/s
Explanation:
We'll begin by converting 20 ms to s. This can be obtained as follow:
1000 ms = 1 s
Therefore,
20 ms = 20 ms × 1 s / 1000 ms
20 ms = 0.02 s
Next, we shall convert the value of the wavelength (i.e 4cm) to m. This can be obtained as follow:
100 cm = 1 m
Therefore,
4 cm = 4 cm × 1 m / 100 cm
4 cm = 0.04 m
A. Determination of the frequency.
Period (T) = 0.02 s
Frequency (f) =?
f = 1 / T
f = 1 / 0.02
f = 50 Hz
Therefore, the frequency of the wave is 50 Hz
B. Determination of the velocity.
Wavelength (λ) = 0.04 m
Frequency (f) = 50 Hz
Velocity (v) =?
v = λf
V = 0.04 × 50
v = 2 m/s
Therefore, the velocity of the wave is 2 m/s
describe two methods by a magnet can be demagnetized
Answers
Answer:
Demagnetizing a magnet :
By hitting with a hammerBy heating with a high temperatureBy dropping the magnetBeing dropped
Question 5 of 25
Two point charges are separated by a distance d. The first has a charge of
+2e, and the second has a charge of +3e. How does the electric potential
energy of the +2e charge change if it is moved to a new position, so that it is
separated from the second charge by a distance of 4d?
(PE=
k= 9.00 x 10° Nm²/C²)
k9192
Y
O A. The new electric potential energy is
electric potential energy.
as strong as the original
B. The new electric potential energy is 4 times as strong as the
original electric potential energy.
C. The new electric potential energy is as strong as the iginal
electric potential energy.
16
D. The new electric potential energy is 16 times as strong as the
original electric potential energy.
Answers
Two point charges are separated by a distance d. The first has a charge of +2e, and the second has a charge of +3e. The new electric potential energy is the same as the original electric potential energy. (option C)
To determine how the electric potential energy of the +2e charge changes when it is moved to a new position, we need to consider the formula for electric potential energy and analyze the situation.
Electric potential energy formula:
The electric potential energy (PE) between two point charges is given by the formula PE = k * (q1 * q2) / r, where k is the electrostatic constant (k = 9.00 x 10^9 Nm²/C²), q1 and q2 are the charges of the two point charges, and r is the distance between them.
Original electric potential energy:
In the original position, the distance between the charges is d. Therefore, the original electric potential energy (PE_original) is given by PE_original = k * (2e * 3e) / d.
New position and distance:
In the new position, the distance between the charges is 4d. Therefore, the new electric potential energy (PE_new) is given by PE_new = k * (2e * 3e) / (4d).
Comparing the original and new electric potential energies:
To compare the two electric potential energies, we can simplify the expressions. By canceling out the common factors, we find that PE_new = PE_original.
Therefore, the new electric potential energy is the same as the original electric potential energy. Thus, the correct answer is C. The new electric potential energy is the same as the original electric potential energy.
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Kinematics practice problems Answers: 4. A race car is traveling at +76 m/s when is slows down at -9 m/s2 for 4
seconds. What is his new velocity?
5. An alien spaceship is 500 m above the ground and moving at a constant
velocity of 150 m/s upwards. How high above the ground is the ship after 5
Seconds?
Answers
The new velocity after 4 s is 40 m/s
The height of the spaceship above the ground after 5 seconds is 1,127.5 m
The given parameters for the first question;
initial velocity of the car, u = 76 m/sacceleration of the car, a = - 9 m/s²time of motion, t = 4 sThe new velocity after 4 s is calculated as;
v = u + at
v = 76 + (-9)(4)
v = 76 - 36
v = 40 m/s
(5)
The given parameters;
height above the ground, h = 500 mvelocity of spaceship, u = 150 m/stime of motion, t = 5The height of the spaceship above the ground after 5 seconds is calculated as;
\(h_y = h_0 + ut - \frac{1}{2}gt^2\\\\h_y = 500 + (150\times 5) - (0.5\times 9.8 \times 5^2)\\\\h_y = 1,127.5 \ m\)
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what is units for joules?
Answers
The work performed by a force of one newton acting through one meter is equivalent to one joule, a unit of work or energy in the International System of Units (SI). James Prescott Joule, an English physicist, inspired the name.
The fundamental SI unit of energy is called a joule, or J. One joule is equal to one kgm²/s², or the kinetic energy of a kilograms mass travelling at one meter per second. As an alternative, it is the amount of work that is performed on an object when a force of one newton operates over a distance of one meter in the direction of the object's motion (1 joule equals 1 newton meter or Nm). The system bears James Prescott Joule's name. Because it is a person's name, the symbol's first letter is capitalised (J instead of j). The term is, however, written in lowercase when it is written out.
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Describe the physical reason for the buoyant force in terms of pressure. Show that the buoyant force is given by F_b = rho_ g V_ using the development in the Theory section. Give the conditions on densities that determine whether an object will sink or float in a fluid. Distinguish between density and specific gravity, and explain why it is convenient to express these quantities in cgs units.
Answers
The buoyant force arises from the pressure difference experienced by an object submerged in a fluid. When an object is submerged, the fluid exerts pressure on all sides of the object. The pressure at the bottom is higher than the pressure at the top due to the weight of the fluid above. This pressure difference results in an upward force, known as the buoyant force.
To derive the expression for the buoyant force, we start with the equation for pressure:
P = ρgh,
where P is the pressure, ρ is the density of the fluid, g is the acceleration due to gravity, and h is the depth of the object in the fluid.
The buoyant force can be calculated by integrating the pressure over the submerged surface area of the object:
F_b = ∫P dA.
Using the definition of pressure and the fact that ρ = m/V (mass per unit volume), we can rewrite the equation as:
F_b = ∫(ρgh) dA.
By substituting A = V (volume of the object), we get:
F_b = ρg∫h dV = ρgV,
where we integrate over the volume of the object.
The resulting expression for the buoyant force is F_b = ρgV, where ρ is the density of the fluid, g is the acceleration due to gravity, and V is the volume of the object submerged in the fluid.
Whether an object sinks or floats in a fluid depends on the relative densities of the object and the fluid. If the density of the object is greater than the density of the fluid (ρ_object > ρ_fluid), the object will sink. If the density of the object is less than the density of the fluid (ρ_object < ρ_fluid), the object will float.
Density (ρ) is a measure of mass per unit volume, while specific gravity is the ratio of the density of a substance to the density of a reference substance (usually water). It is convenient to express these quantities in cgs (centimeter-gram-second) units because they simplify calculations in fluid mechanics and have historical relevance in traditional scientific literature.
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Match the description of an object's motion with the position-time graph that represents at A. slowing down B. moving with constant speed C. not moving D. speeding up
Answers
The descriptions of object's motion with the position-time graph that represents at:
D. speeding up - Graph 1
C. not moving - Graph 2
B. moving with constant speed - Graph 2
A. slowing down - Graph 3
What is motion?Motion is the conceptual notion in which an object moves from its position with respect to time. Motion is acceptable to be described in terms of displacement, distance, velocity, acceleration, speed.
Furthermore, Motion is a change in an object's position over time. It is the result of forces acting upon an object, and can be described in terms of distance, speed, and direction.
Therefore, it is a change of position or orientation of a body with the change of time. looking at the attached graph, it can then be concluded that the correct answers are as given above
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hii! help asap. i’ll give brainliest thanks!
Answers
Answer:
a i believe
Explanation:
2. True or False Every sample of a pure substance has exactly the same composition
and the same properties.
3. What are the two categories of pure substances?
a.
b.
شب نه ه ن
Name:
Answers
Answer:
the correct answer is False
Explanation:
i hope its right
if an object left earth which direction would it travel
Answers
Answer:
In a straight line
Explanation:
Why, because of the power of inerta
a baseball pitcher throws the ball in a motion where there is rotation of the forearm about the elbow joint as well as other movements. if the linear velocity of the ball relative to the elbow joint is 20.0 m/s at a distance of 0.480 m from the joint and the moment of inertia of the forearm is , what is the rotational kinetic energy of the forearm?
Answers
To find the rotational kinetic energy of the forearm in this scenario, we need to use the equation:
Rotational kinetic energy = 1/2 x moment of inertia x angular velocity^2
First, we need to find the angular velocity of the forearm. We know that the linear velocity of the ball relative to the elbow joint is 20.0 m/s at a distance of 0.480 m from the joint. We can use the formula for tangential velocity to find the angular velocity:
Tangential velocity = radius x angular velocity
Rearranging this formula, we get:
Angular velocity = tangential velocity / radius
Plugging in the values we have, we get:
Angular velocity = 20.0 m/s / 0.480 m
Angular velocity = 41.67 rad/s
Now that we have the angular velocity, we can calculate the rotational kinetic energy using the formula above. However, we need to know the moment of inertia of the forearm. This is not given in the question, so we cannot provide a numerical answer.
The moment of inertia depends on the mass distribution of the forearm. In general, a longer and heavier forearm will have a larger moment of inertia. Without knowing more details about the pitcher's forearm, we cannot calculate the moment of inertia and therefore cannot provide a numerical answer for the rotational kinetic energy.
In summary, to find the rotational kinetic energy of the forearm in this scenario, we would need to know the moment of inertia of the forearm. We can find the angular velocity using the given linear velocity and distance from the elbow joint, but we cannot provide a numerical answer without the moment of inertia.
To calculate the rotational kinetic energy of the forearm, we need to first find the angular velocity (ω) using the linear velocity (v) and distance (r) provided. Then, we can use the moment of inertia (I) and the angular velocity to find the rotational kinetic energy (K).
1. Calculate the angular velocity (ω) using the linear velocity (v) and distance (r):
ω = v / r
ω = 20.0 m/s / 0.480 m
ω ≈ 41.67 rad/s
2. Calculate the rotational kinetic energy (K) using the moment of inertia (I) and the angular velocity (ω):
K = 0.5 * I * ω^2
You didn't provide the moment of inertia (I) in the question, so I cannot give you a specific numerical answer for the rotational kinetic energy (K). However, you can use the formula above to calculate it once you have the moment of inertia.
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What are 3 parts of daltons atomic theory ?
Answers
A car travels at a rate of 25 km/hr for 1.5 hours, then is stopped behind a train for .50 hours, and finally at 21 km/hr for 1.25 hours.
Answers
The average speed of the car is 19.62 km/hr.
'Your question is not complete, it seems to be missing the following information'
find the average speed of the car
The given parameters;
initial velocity of the car, u = 25 km/hr
time of motion of the car, t= 1.5 hr
final velocity, v = 21 km/h
time of motion, = 1.25 hr
The average speed of the car is calculated as follows;
\(average \ velocity = \frac{total \ distance }{total \ time} \\\\average \ velocity = \frac{(25 km/h \times 1.5h)+(21km/h\times 1.25hr)}{(1.5h + 0.5h + 1.25h)} \\\\average \ velocity = 19.62 \ k m/hr\)
Thus, the average speed of the car is 19.62 km/hr.
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HUUUUURRRRRYYYYY
Latent heat of fusion refers to which changes of state?
liquid to solid or solid to gas
solid to gas or gas to liquid
solid to liquid or liquid to solid
gas to liquid or liquid to gas
Answers
Answer:
solid to gas or gas to liquid
Explanation:
welcome
Answer:
solid to gas or gas to liquid
Explanation:
Edge
"The gravity of body is not necessary on body. " justify
Answers
Answer:
Answer: there are two factors on which centre of mass depends
*its shape and
*the way mass distributed on its shape.
These two factor decide whether centre of mass of gravity lie inside the body or outside the body.
If the body is regular the centre of mass lies inside the body if it is not regular then it lies outside the body
Explanation:
the substance of the physical world
Answers
Answer:
The substance of the physical world; anything that occupies space or has substance. An organized way of scientists to gather and pursue scientific knowledge. Consists of three main components: Hypothesis, Observation, and Experimentation. One of the main components of the Scientific method.
Explanation:
Which of the following is one dimensional
A.
acceleration
B.
velocity
C.
both velocity and acceleration
D.
speed
Answers
Answer:
both velocity and acceleration
Explanation:
answer May be 3
It has been a hot summer, so when you arrive at a lake, you decide to go for a swim even though it it nighttime. The water is cold. The next day, you go swimming again during the hottest part of the day, and even though the air is warmer the water is still almost as cold. Why?
(a) Water is fairly dense compared with many other liquids.
(b) Water remains in a liquid state for a wide range of temperatures.
(c) Water has a high bulk modulus.
(d) Water has a high specific heat.
Answers
Answer:
(d) Water has a high specific heat.
Explanation:
At night, when the temperature of earth goes down due to loss of heat , the temperature of water is lost slowly and temperature of land is lost fast because of high specific heat of water . Water loses as well as gains temperature comparatively slowly due to its high specific heat .
During daytime when earth gains heat , the temperature of land rises more rapidly than water so water appears cool even during daytime when land becomes hotter . It is also due to high heat holding capacity of water or due to high specific heat of water .