For a light ray traveling from a medium of n = 1.50 to air the incident angle is 31.3 degrees. Which one is the most likely angle of refraction? The speed of light in vacuum is 3.00E+08 m/s, use it as an approximation for the air.0.7 degrees51.2 degrees27.6 degrees31.3 degrees51

Using the Standard population for region, the proportionate mortality for old people in region Y is 80%. The correct answer is option  (c).

To calculate the proportionate mortality, we need to determine the number of deaths among old people in region Y and divide it by the standard population for region Y.

According to the given options, option c is the correct answer, which states that the proportionate mortality is 48/60 = 80%.

This means that out of the standard population of 60 in region Y, 48 deaths occurred among old people. This indicates a high proportionate mortality rate for the elderly population in region Y, reflecting the impact on that age group's mortality in the region.

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Answer:

C.

Explanation:

Answer:C

Explanation:

Answer:

See below

Explanation:

Work = F * d

        = 370 N * 3.66 m = 1354.2  J

Answer:

True

Explanation:

Generally speaking, we say that light travels in waves, and all electromagnetic radiation travels at the same speed which is about 3.0 * 108 meters per second through a vacuum.

Answer:

absolutely true

Explanation:

as it travels in a speed of 30×108 m per second

The time taken is 2.3s for a spaceship hovering over the surface of Venus to drop an object from a height of 24m, and 2.21s for the same spaceship hovering over the surface of Earth to drop an object from the same height.

To solve this problem, we will use the motion equation to calculate the time of flight of an object on the surface of Venus and the Earth. The height is related by the following equation of motion:

h = v₀t + gt²/2

Because the object's initial velocity before dropping is zero, we can simplify the equation to:

h = gt²/2

We know the height h of the spaceship hovering, and Venus's gravity is g = 9.07m/s². Substituting the following values into the equation:

24m = (9.07 m/s²t²)/2

To calculate the time it takes an object dropped by a spaceship hovering from a height of 24m to reach the surface of Venus, we must remove t from the equation above, yielding:

t = \(\sqrt{2(24m)/9.07m/s^{2} }\)

 = \(\sqrt{48m/9.07m/s^{2} }\)

 = 2.3s

Similarly, to calculate the time it takes an object dropped from a height of 24m to reach the Earth's surface, and the gravity of the Earth is g = 9.81m/s² .

t = \(\sqrt{2(24m)/9.81m/s^{2} }\)

 = \(\sqrt{48/9.81m/s^{2} }\)

 = 2.21s

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Mineralogically, barite is a sulfate, bornite is a sulfide, cuprite is an oxide, magnesite is a carbonate.

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Among the mineral groups, barite is a sulfide mineral, bornite is a sulfide mineral, cuprite is an oxide mineral, and magnesite is a carbonate mineral.

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Answer:

The brightness of bulb 1 dies because it is switched off.

Answer:

flammability of hydrogen

Explanation:

Chemical properties are properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter. They include reactivity, flammability, and the ability to rust.

Set up the system under static equilibrium conditions. That is, there is no net torque acting on the system.

(a) The youngster, who weighs 600 N, moves x steps away from point A in a direction toward the right. Below is a diagram of a free body.By assuming zero positive clockwise torque about A

A =(600N)(x)+(300N)(2.50m)-F B(5.0m) 0=600x+750N cdot m 5F B 5F B=600x + 750N cm F B=120x+150N cm

0=600x+750N⋅m−5F B 5F B = 600x+ 750N m F B = 120x + 150N m

Additionally, by applying positive clockwise torques to B

sum B = F A(5.0 m) -(300 m)(2.50 m) -(600 m)(5.0 m -x) 5F A = 3750; N cm -600x; F A = 750; N cm -120x; 0=5F A -750; N cm -3000; N cm + 600x; B = F A (5.0m), (300N), (2.5m), (600N), (5.0m x), 0 = 5F A 750N m 3000N m + 600x 5F A = 3750N m 600x F A = 750N m 120x

Complete question is:

A uniform aluminum beam 9.00 m long, weighing 300 N, rests symmetrically on two supports 5.00 m apart (Fig. E11.12). A boy weighing 600 N starts at point A and walks toward the right.

(a) In the same diagram construct two graphs showing the upward forces FA and FB exerted on the beam at points A and B, as functions of the coordinate x of the boy. Let 1 cm = 100 N vertically, and 1 cm = 1.00 m horizontally

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Answer: Down below is the answer in complete sentences!

Explanation:

PART A:

Gravity and Acceleration are two additional forces acting upon the sled.

PART B:

Gravity will affect the sled by pulling it down, since the slope of the hill is negative.

Acceleration will affect the sled by gradually increasing it's speed, since the slope is downwards, which in addition to the initial force exerted plus gravity increases the speed, thus the sled accelerates.

Mars shows clear evidence of water erosion in addition to Earth.

The Martian surface shows abundant evidence of water erosion. Liquid water is unstable under present climatic conditions but conditions may have been different in the past. The planet has been volcanically active throughout its history. The features look like drainage networks in some cases. In others, they look like features carved in huge floods. Carbon dioxide is a strong greenhouse gas, so it really was the leading candidate to explain the drying out of Mars.

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It will take 1.1824 min for the reactant concentration to decrease from 0. 13 m to 0. 088 m.

K = 0.33/min

for first-order reaction

K×t = ln([A0]/[A])

[A0] = 0.13 M

[A] = 0.088 M

t = ln (0.13/0.088)/0.33 = 1.1824 min

A first-order reaction depends on the awareness of the most effective reactant (a unimolecular response). other reactants may be present, however, their attention has no impact on the fee. The fee regulation for a primary order response is --d[A]/dt = okay[A],

Although not affecting the above math, the general public of first-order reactions continues through intermolecular collisions. Such collisions, which contribute the electricity to the reactant, are always 2nd order. The fee of those collisions is, but, masked via the reality that the price determining step stays the unimolecular breakdown of the energized reactant. The half of-existence is impartial of the beginning awareness and is given with the aid of t1/2 = In(2)/k

In organic chemistry, the class of SN1 (nucleophilic substitution unimolecular) reactions includes first-order reactions. for instance, in the reaction of aryldiazonium ions with nucleophiles in an aqueous solution, [ArN2+] + X− → ArX + N2, the fee equation is v0 = ok[ArN2+], wherein Ar shows an aryl group.

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Answer: Wave a the first answer is right

Brainliest.

Explanation:

Answer:

the correct answer is ( head ) just took it

The body loses up to 40 percent of its body heat through the head area.

The heat transferred to the surrounding by the thermal conductive substance per unit time.

40 to 45 percent of human body heat is lost through the head and neck due to increased blood flow as compared to the rest of the body.

Along with the wrists and ankles, this can be 60 percent.

Thus, the body loses up to 40 percent of its body heat through the head area.

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Answer:

greater than

Explanation:

A bowling ball is bigger than a golf ball and greater than means bigger.

The negatively charged van de Graff generator can make a flow of electrons through the tape and these both will repel each other. When the tape comes in contact with the balloon, the positive charges of balloon gets attracted and they stick together.

Electrons are drawn from the earth by a Van de Graaff generator, transported via a belt, and then stored on the big sphere. These electrons are attracted to one another and try to distance themselves from one another by dispersing throughout the surface of the sphere.

Electrons can spread out widely on the earth, thus they will choose the shortest route possible to return to the ground. The electrons from the tape repel the electron from the tape, make the tape negatively charged.

This negatively charged tape when comes in contact with the balloon, it will polarize the balloon and its positive charges aligns with the tape's charge and gets stuck.

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The leading explanation for the existence of spiral arms in galaxies is the **density wave theory**.

According to the density wave theory, spiral arms are not fixed structures but rather dynamic patterns that result from density waves propagating through the galactic disk. These waves cause regions of higher density and compression, leading to the formation of the spiral arms.

The theory suggests that as gas and stars move through the galactic disk, they are subjected to gravitational perturbations from neighboring objects or asymmetries in the gravitational field. These perturbations create wave-like patterns that move through the disk, causing regions of compression and enhanced star formation, which manifest as the bright arms we observe.

The density wave theory explains the persistence and relatively stable appearance of spiral arms over long periods. It also accounts for the observed differential rotation of stars within a galaxy, with stars moving faster or slower as they pass through the spiral arms.

While the density wave theory is the leading explanation, other factors such as interactions between galaxies and the effects of magnetic fields can also play a role in shaping and maintaining spiral arms. Ongoing research continues to refine our understanding of the mechanisms behind the formation and dynamics of these beautiful structures in galaxies.

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Answer:

Explanation:

window!

The light most likely strikes on a window.

Refraction of light is defined as the bending of light when it travels from one medium to another.

Here,

When light falls on a smooth, reflecting surfaces like glass, mirror, water, it gets bounced back. This is known as the reflection of light.

But when a light ray strikes on the surface like, a window, the light will get refracted and as a result, when it passes through the glass, the path of the light is changed.

The light undergoes refraction twice, as the light enters and gets escaped from the window.

Hence,

The light most likely strikes on a window.

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The squared quantity is 4(2L/π)².

To calculate the quantity you're asking for, we'll first determine the distance of each star from the center of rotation. Let's assume the stars are labeled as A, B, C, and D.

The center of the square is equidistant from all four stars. Let's denote this distance as R.

Since the stars are arranged at the corners of a square, the diagonal of the square is twice the distance from a corner to the center. Therefore, the diagonal of the square has a length of 2R.

Now, let's consider the diagonal of the square as the diameter of the circle in which the stars move. The circumference of a circle is given by the formula:

C = 2πr

where C is the circumference and r is the radius of the circle.

In this case, the circumference of the circle is equal to the perimeter of the square, which is 4L. Therefore:

2πR = 4L

R = 2L/π

Now, to calculate the squared quantity you're interested in, we can find the sum of the squares of the distances of the stars from the center:

Sum = (Distance of star A)² + (Distance of star B)² + (Distance of star C)² + (Distance of star D)²

Since all four stars are equidistant from the center, we can calculate the sum as:

Sum = 4R²

Substituting the value of R we found earlier:

Sum = 4(2L/π)²

Therefore, the squared quantity you're looking for is 4(2L/π)².

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Answer:

how does the amount of strokes on a magnet affect the strength of it? Note- I'm NOT a high schooler. Simple answers please. I'm 11.

Explanation:

The amount of strokes on a magnet does not affect its strength. The strength of a magnet depends on the properties of the materials it is made of, such as the type of metal and the way it is magnetized. Once a magnet is magnetized, it will retain its strength unless it is exposed to high temperatures or strong magnetic fields that can demagnetize it.

The power being dissipated by the hand-crank generator is 94.12 Watts.

Given the following data:

To find the power being dissipated by the hand-crank generator:

Mathematically, power is given by the formula;

\(Power = \frac{Energy}{Time}\)

Substituting the given parameters into the formula, we have;

\(Power = \frac{160}{1.70}\)

Power = 94.12 Watts.

Therefore, the power being dissipated by the hand-crank generator is 94.12 Watts.

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Answer:

Explanation:

Mass doesn't matter here because when something is falling, gravity plays fairly; an elephant falls at the same rate of acceleration as does a feather. What DOES matter is everything pertinent to the y-dimension of free-fall:

a = -9.8 m/s/s

v₀ = 0 (since the ball was held before it was dropped)

v = ??

Δx = -8 m (negative because the ball drops this far below the point from which it was released).

Putting all this together in one equation:

v² = v₀² + 2aΔx and filling in this equation:

v² = (0)² + 2(-9.8)(-8) and

v² = 156.8 so

v = 12.5 which rounds to 13 if you're using 2 sig figs, and rounds to 10 if you're only using 1 (which you should be, according to the way the numbers have been given in this problem)

Answer:

Bowling ball

Explanation:

The bowling ball's mass will make it roll down the incline faster than the lighter volleyball.

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The conditions necessary to produce a solar eclipse are the moon's position in relation to the sun and Earth, as well as the Earth's position in relation to the sun. A solar eclipse can only occur during a new moon and can be total, partial, or annular.

A solar eclipse is an occurrence when the moon transits between the sun and the Earth, blocking the sun's light and casting a shadow on the Earth's surface.

The conditions needed to produce a solar eclipse are the moon's position in relation to the sun and Earth, as well as the Earth's position in relation to the sun. A solar eclipse only occurs during a new moon when the sun, moon, and Earth are aligned in a straight line with the moon between the sun and Earth.

This occurs approximately twice a year. There are three types of solar eclipses: total, partial, and annular. In a total solar eclipse, the moon completely covers the sun's disk, causing a total blackout.

A partial solar eclipse occurs when the moon covers only a portion of the sun's disk. An annular solar eclipse occurs when the moon is at its farthest point from the Earth and appears smaller, creating a "ring of fire" around the sun.

For a solar eclipse to occur, the moon must be in its new phase, which means it must be on the same side of the Earth as the sun. During this time, the moon's shadow falls on the Earth's surface, creating a path of totality or partiality.

The path of totality is the area where a total solar eclipse can be observed, while the path of partiality is the area where a partial solar eclipse can be observed. In conclusion, a solar eclipse occurs when the moon passes between the sun and the Earth, casting a shadow on the Earth's surface.

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a) The number of turns in the solenoid is approximately 206.

To determine the number of turns in the solenoid, we can use the formula for the magnetic field inside a solenoid, which is given by B = μ₀nI, where B is the magnetic field, μ₀ is the permeability of free space, n is the number of turns per unit length, and I is the current.

Rearranging the formula, we have n = B / (μ₀I). Substituting the given values of B = 9.00 T and I = 75.0 A, and using the value of μ₀, we can calculate the number of turns per unit length. Multiplying it by the length of the solenoid (0.500 m) gives us the total number of turns in the solenoid, which is approximately 206.

A solenoid is a coil of wire wound in a helical shape. When a current flows through the coils, it creates a magnetic field along the axis of the solenoid. The strength of the magnetic field depends on factors such as the number of turns per unit length and the current flowing through the solenoid.

In this case, we are given the magnetic field and current, and we use the formula for the magnetic field inside a solenoid to calculate the number of turns. The higher the number of turns, the stronger the magnetic field generated by the solenoid.

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Answer:

True

Explanation:

We have that the statement is

True

Kinesiology

Kinesiology  is the study of human movement,and functions by inducing other sciences of like exercise psychology , exercise sociology and other science that studies human movement and performance

Therefore

The Statement is True

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The surface tension that is a result of water's cohesive properties makes it possible to float a needle on the surface of water. The correct answer is "the surface tension that is a result of water's cohesive properties makes this possible."

Surface tension is a property of liquids that arises from the cohesive forces between the molecules at the surface of the liquid. Water molecules are attracted to each other due to intermolecular forces, such as hydrogen bonding. This cohesion creates a strong surface tension in water.

When a needle is carefully placed on the surface of water, the water molecules at the surface are able to create a "skin" or a strong cohesive layer due to their attractive forces. This cohesive force is greater than the weight of the needle, allowing it to float on the water's surface.

The other options presented in the question are not accurate explanations for why a needle can float on the surface of water:

- A single needle being less dense than water is not the primary reason for its ability to float. Many objects denser than water can float due to factors like shape or surface tension.

- Covalent bonds holding water molecules together do not directly contribute to the needle floating. It is the cohesive forces between water molecules that create surface tension.

- Water's adhesive properties refer to its ability to stick to other substances, which is not the primary factor in the floating of a needle on water's surface.

The ability to float a needle on the surface of water is primarily due to the surface tension resulting from water's cohesive properties. The cohesive forces between water molecules create a strong skin or surface layer that can support the needle's weight and allow it to float.

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a) Without specifying the material of the block, I cannot provide a specific value for the speed of light in the block.

b) The critical angle (θ_c) is defined as the angle of incidence at which the angle of refraction becomes 90 degrees.

c) The refractive index of air is close to 1, while the refractive index of water is approximately 1.33.

a) The speed of light in a block depends on the refractive index of the material the block is made of. Each material has a unique refractive index, which determines how light propagates through it.

Therefore, without specifying the material of the block, I cannot provide a specific value for the speed of light in the block.

b) The critical angle of a block, assuming it is a transparent medium, can be determined using Snell's law and the concept of total internal reflection. The critical angle (θ_c) is defined as the angle of incidence at which the angle of refraction becomes 90 degrees.

Sin(θ_c) = n2/n1

Where n1 is the refractive index of the medium the light is coming from (usually air) and n2 is the refractive index of the block material.

c) The critical angle of a water-air interface can be calculated using the same formula as above. The refractive index of air is close to 1, while the refractive index of water is approximately 1.33. Substituting these values into the equation, we find:

Sin(θ_c) = 1/1.33

Calculating the inverse sine of both sides, we obtain the critical angle of the water-air interface.

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