a beam of linearly polarized light is changed into circularly polarized light by passing it through a slice of crystal 0.003 cm thick. calculate the difference in the refractive indices for the two rays in the crystal, assuming this to be the minimum thickness showing the effect for a wavelength of 600 nm. sketch the arrangement, showing the optical axis (oa) of the crystal, and explain why this occurs with 3-5 sentences

Answer:

Which ball has the least momentum? C. A 160 g ball that is rolling north across a field at 2.0 m/s

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Answer:

c.160 g ball that is rolling north across a field at 2.0 m/s

Explanation:

here the mass and the velocity matters

lesser the mass and velocity, lesser the momentum

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r=4ab+2mn/3t

It is given that,

3rt -2mn =4ab

Or, 3rt=4ab+2mn

Or, r=4ab+2mn/3t

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The body will stay at rest (Option D). It is because a force of magnitude 50 N is pulled towards left and another force is pulling it towards right with same magnitude 50 N. So, the direction of force is opposite and magnitude is same i.e. 50 N. So, they will cancel each other and net force is 0. Hence, there would be no acceleration.

Hence, these options are incorrect because they are only possible when net external force is non-zero. Staying at rest i.e. Option D means there is no motion and hence no acceleration, this shows that net force is 0\(.\)

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Answer:

I) 420000J

ii)

Explanation:

(I) so you can use the formula for quantity of heat then substitute the values given

formula-Q=mc∆9

Object positions with the image positions for a convex lens. The image formed by a convex lens can be real or virtual, upright or inverted, and magnified or diminished depending on the position of the object relative to the lens.

A convex lens is a converging lens, meaning it converges light rays to a point after passing through the lens. The image formed by a convex lens can be real or virtual, upright or inverted, and magnified or diminished depending on the position of the object relative to the lens.

a. Beyond 2f: When the object is beyond 2f (twice the focal length) of the convex lens, a real, inverted, and diminished image is formed between f (the focal point) and 2f.

b. At 2f: When the object is placed exactly at 2f (twice the focal length) of the convex lens, a real, inverted, and same-sized image is formed at 2f.

c. No image: When the object is placed at the focal point of the convex lens, no real image is formed. Instead, a virtual, upright, and magnified image is formed on the same side of the object.

d. Between f and 2f: When the object is placed between f (the focal point) and 2f of the convex lens, a real, inverted, and magnified image is formed beyond 2f.

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Surprisingly fast orbital speeds of stars and gas clouds located far from the galactic center indicate that these objects are subject to gravitational influences.

The moon is maintained in its orbit around Earth by gravity, as are the planets in their orbits around the sun. Ocean tides are a result of the moon's gravitational effect on the oceans. The stuff that stars and planets are comprised of is pulled together by gravity to form them.

involving or pertaining to the attraction between two masses: Ocean tides rise and fall due to the moon's gravitational pull. of or pertaining to a strong inclination or movement in the direction of something or someone: There has been a lot of research on why they gravitate toward destructive behavior.

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In any chemical reaction, energy must be conserved.

In any chemical reaction, energy must be conserved to uphold the fundamental law of energy conservation. Energy can neither be created nor destroyed; it only transforms from one form to another

. This principle holds true for all chemical reactions, where the total energy of the system remains constant. Energy changes occur as bonds break and form, and if a reaction absorbs more energy than it releases, it is endothermic.

Conversely, exothermic reactions release more energy than they absorb. Energy conservation is crucial not only in understanding the behavior of chemical reactions but also in various other scientific disciplines.

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Answer:

450N

Explanation:

Given parameters:

Mass of object  = 450kg

Initial velocity  = 15m/s

Final velocity  = 75m/s

Time  = 1min  = 60s

Unknown:

Force applied  = ?

Solution:

To solve this problem, from Newton's second law of motion, we know that;

  Force  = mass x acceleration

  Acceleration  = \(\frac{v - u }{t}\)

 v is the final velocity

 u is the initial velocity

 t is the time taken

Now;

    Force  = mass x  \(\frac{v - u }{t}\)

   Force  = 450 x \(\frac{75 - 15}{60}\)  = 450N

Answer:

6,400

Explanation:

i made sure  the other person was right and i got the same answer

The temperature of the boiler of the steam engine at the efficiency of 34.8% and waste heat temperature of 76 °C, is determined as 116.56°C.

The efficiency of a Carnot engine is determined using the following formula;

n = 100% x (TH - TC)/TH

where;

34.8% =  100% x (TH - 76)/TH

0.348 = (TH - 76)/TH

0.348TH = TH - 76

0.652TH = 76

TH = 76/0.652

TH = 116.56°C

Thus, the temperature of the boiler of the steam engine at the efficiency of 34.8% and waste heat temperature of 76 °C, is determined as 116.56°C.

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The average acceleration vector of the ball is approximately 9.8 m/s² downward.

When the ball is thrown upward, it experiences a constant acceleration due to gravity pulling it downward. This acceleration is equal to 9.8 m/s², which is the acceleration due to gravity near the surface of the Earth. Since the ball reaches the same speed in the downward direction when it returns to the hand, we can conclude that its average acceleration vector is also 9.8 m/s² downward.

When the ball is thrown upward, it moves against the force of gravity. As it moves upward, the gravitational force slows it down until it reaches its highest point. At this point, the ball momentarily stops before reversing direction and falling back downward.

The force of gravity then acts in the same direction as the ball's motion, causing it to accelerate downward. The acceleration due to gravity remains constant throughout the ball's motion, regardless of its direction.

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Answer:

Option A - Sound waves must move through a substance

Explanation:

Unlike light waves, sound waves must travel through a medium/substance for such a medium to vibrate and then produce sound.

As a matter of fact sound can't travel through empty space.

Thus, looking at the options given, the correct one is:

Sound waves must move through a substance which is Option A

Answer:

The plane goes for 600 km per hour.

The trip from a city to another is 2.5 hours

Basically, all you have to do is multiply 600 by 2.5.

That’s 1,500 kilometres.

Explanation:

A plane's average speed between two cities is 750 km/hr and if the trip takes 2.5 hours then the total distance covered by the plane would be 1875 kilometers.

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.

As given in the problem, a plane's average speed between two cities is 750 km/hr and if the trip takes 2.5 hours then we have to find out  the total distance covered by the plane,

The plane's average speed between two cities is 750 kilometers/hour,

time is taken in the whole trip = 2.5 hours

The distance covered by the plane =  750 kilometers/hour×2.5 hours

                                                          = 1875 kilometers

Thus, the total distance covered by the plane would be 1875 kilometers.

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Andrew's displacement while visiting his grandparents is 35 miles to the east.

The displacement is the shortest distance travelled by the particle. It is the vector quantity which represents both the magnitude and direction.

Given Andrew drives to his friend's house, which is 60 miles to the east. After visiting, he travels 25 miles to the west to visit his grandparents.

The displacement will be

60 miles to the east - 25 miles to the west = 35 miles to the east

Thus, the Andrew's displacement is 35 miles to the east.

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The voltage in each branch of the parallel circuit is 9.0 V.

A parallel circuit is a type of electrical circuit in which the components are arranged in such a way that they are connected to the same voltage source by separate branches.

In a parallel circuit, each component has its own individual path for electric current to flow, and the total current is equal to the sum of the currents flowing through each branch.

In a parallel circuit, the voltage across each component is the same, but the current through each component can be different.

V1 = V2 = V = 9.0 V

where;

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Answer:

no is not hard to walk on sand and yes it's hard for ice

Explanation:

ice is liquid

ω-transaminase is more selective in the synthesis of amino acid, while normal transaminase is less selective.

Transaminase is an enzyme that transfers an amine group from an amino acid to an α-keto acid, resulting in the conversion of an amino acid to a different amino acid. The ω-transaminase differs from normal transaminase in the selectivity of amino acids synthesized.ω-transaminase is a narrow-range enzyme and is often used to synthesize enantiomerically pure amino acids. Normal transaminase is less selective, synthesizing a variety of amino acids in the reaction.

Way of production of ω-transaminase and normal transaminase: The ω-transaminase and normal transaminase are often produced using genetic engineering techniques. Production methods include mutation, immobilization, or in vitro recombination.

Mutation: Genetic mutations can be introduced to generate ω-transaminase from normal transaminase.Immobilization: Both ω-transaminase and normal transaminase can be immobilized in the matrix to facilitate recovery and reuse of enzymes.

In vitro recombination: In vitro recombination can also be used to produce ω-transaminase.

ω-transaminase is more selective than normal transaminase in the synthesis of amino acids. Both enzymes can be produced through genetic engineering techniques such as mutation, immobilization, or in vitro recombination.

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Answer:

a true

Explanation:

Water has the high specific heat capacity.

That means it resists to change its temperature when a considerable amount of heat lost or gained

4200J is needed to raise the temperature of 1kg substance by 1 degree Celsius

Answer:

Is this science you are talking about

Explanation:

Answer:

If your form is correct (b)

Answer:

The answer is B if your form is correct

Answer:

Explanation:

1st option is the correct answer......

It is distinguished from the other planets by the presence of liquid water on its surface, the presence of life, and active plate movement. It rotates on its axis once every 24 hours (a day) and orbits the Sun once every 365 days (a year). The Earth has a single moon.

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Answer:

-10 m/s²

Explanation:

a = Δv / Δt

a = (20 m/s − 50 m/s) / 3 s

a = -10 m/s²

Answer 10 m/s²

Explanation:

a = Δv / Δt

a = (20 m/s − 50 m/s) / 3 s

a = -10 m/s²

Explanation:

Answer: decantation and screening

Explanation:

Answer:

it is A

Explanation:

the person above me helped

Answer:

rolling ball down a hill

Explanation:

A rolling ball has kinetic energy

Answer: An airplane has a large amount of kinetic energy in flight becuase of its large mass and fast velocity.

Explanation:

An infrared thermometer does not have to touch the surface of food to check the temperature accurately.

Infrared thermometers, can be called laser thermometers, work by measuring the infrared radiation emitted by an object.

Since they don't need to make direct contact with the food, they can provide a temperature reading without potentially contaminating the food.

Whilee Infrared thermometers are often used to measure the temperature of food, but they can also be used to measure the temperature of other objects, such as people, animals, and the environment.

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In scientific notation  "thirty two micro meter" can be expressed as 3.2 x 10^-5 m.

Micrometer, often known as micron, is a unit of length in the metric system equal to 0.001 mm, or roughly 0.000039 inch. m is its symbol.

The micrometer is frequently used to gauge the size of small items like colloidal particles and bacteria. Micrometers are also used to describe extremely small distances, like the infrared radiation's wavelengths.

So, 1 micrometer = 10^-6 meter.

∴ thirty two micrometer = 32 × 10^-6 meter = 3.2 × 10^-5 meter.

Hence,  in scientific notation  "thirty two micro meter" can be expressed as 3.2 x 10^-5 m.

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Answer:

It is Force

Explanation:

A Force is a push or pull upon an object resulting from the objects interaction with another object.

The index of refraction of the plastic is approximately 1.52. To find the index of refraction of the plastic, we can use the formula for calculating the fringe width in a double-slit interference pattern.

Given:

Wavelength of laser light (λ) = 632.8 nm = 632.8 × 10\(^(-9)\) m

Distance between the scratches (d) = 0.225 mm = 0.225 × 10\(^(-3)\) m

Width of the central bright fringe (w) = 5.82 mm = 5.82 × 10\(^(-3)\) m

The fringe width (Δy) can be calculated using the formula:

Δy = (λ * L) / d

where L is the distance between the slits and the screen.

In this case, the black face of the cylindrical pipe acts as the double-slit system, and the opposite face with the fluorescent coating acts as the screen. The distance between the slits (d) is equal to the width of the central bright fringe (w), and we need to find L.

L is the distance from the double-slit system (black face) to the screen (fluorescent face). In the cylindrical pipe, L is half of the length of the pipe:

L = (3.25 m) / 2 = 1.625 m

Substituting the values into the formula, we have:

w = (λ * L) / d

Solving for λ, we get:

λ = (w * d) / L

Substituting the given values:

λ = (5.82 × 10^(-3) m * 0.225 × 10^(-3) m) / 1.625 m

Calculating the value:

λ ≈ 8.03 × \(10^(-7)\)m

Now, we can use the index of refraction (n) formula to find the refractive index of the plastic:

n = λ0 / λ

where λ0 is the wavelength of light in vacuum.

Substituting the given values:

n = λ0 / λ = 632.8 × 10^(-9) m / 8.03 × 10^(-7) m

Calculating the value:

n ≈ 1.52

Therefore, the index of refraction of the plastic is approximately 1.52.

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