a thin film of thickness 280 nm and index of refraction 1.4 coats a plate of glass having index of refraction 1.65. if light is perpendicularly incident on the glass, at what wavelength is the reflected light minimal?

The moment caused by the 2 kg mass placed at a distance of 0.5 m to the left of the pivot is 1 kg m. This moment is anticlockwise.

Moment is a physical parameter equal to the product of the distance or displacement and another physical quantity such as mass, force etc.

For a mass of 2 kg and distance of 0.5 m the moment is  :

moment = mass × distance

= 2 × 0.5 = 1 kg m

If we are taking the moment of force, then it the product of the distance and force acting on the body is taken.

force = mg

F =  2 kg × 9.8 m/s² = 19.6 N

then moment of force = 19.6 N × 0.5 m = 9.8 N

The moment from left to right in direction is anticlockwise.

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Option -C : Pressure stays the same because  it is only a function of depth .

When the diver moves horizontally, the pressure is unaffected as pressure is function of depth only.

since,

p = denisty × gravity × depth

so only depends on depth.

The molecules and atoms that make up the many layers of the atmosphere are continually moving in arbitrary directions. Despite their small size, when they hit a surface, they apply pressure that humans perceive as a force. Since molecules can flow in any direction, they can even apply air pressure to an object as they collide from below. Air pressure can be applied in all directions in the atmosphere. An object or person suspended in a fluid and moving with it experiences static pressure. The pressure that develops when a flow is isentropically slowed to zero velocity is known as the stagnation pressure. The air pressure in various environments will vary, which will have an impact on how the vehicle operates. Air is thinner at higher altitudes,

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Question :

a diver moves horizontally from the underside of a bridge structure (position 1) to open water (position 2). ignoring effects like currents in the water, what pressure change will the diver sense between positions?

A . pressure increases from 1 to 2 because the bridge keeps the atmosphere from pushing down on the water at position 1.

B .  pressure decreases  from 1 to 2 because the weight of the bridge pushes down on the water at position 1.

C. Pressure stays the same because  it is only a function of depth .

D. pressure  may increase or decrease  depending upon water properties like density.

Answer:

Matter is a substance which has mass and takes up space by volume the properties of matter are,

States of matter (solid,liquid,gas)are inter convertable.

Force of attraction varies from one kind of matter to another.

States of matter can be varied by varying temperature and pressure.

Explanation:

Answer:

2.39 °C

Explanation:

Specific heat of water = 4187 j / kg °C     (You eaither have to be given this, or know this  or look it up)

100 g of water = .1 kg of water

1000 j  / (.1 kg * °C) = 4187  j / (kg °C)

solve for C = 2.39°C

A fuel-filled rocket is at rest. It burns its fuel and expels hot gas. The gas has a momentum of 1,500 kg m/s backward. So, The momentum of the rocket is -1500 kg m/s.

According to the law of conservation of momentum, in a closed system, the total momentum before and after a process remains constant.

A fuel-filled rocket that is initially at rest expels hot gas as it burns its fuel. The gas has a momentum of 1500 kg m/s backward.

We are required to determine the momentum of the rocket.

Consider the fuel-filled rocket as a system.

We have: Momentum before the burn = 0 kg m/s (since the rocket was at rest initially)Momentum after the burn = momentum of the expelled gas

We can therefore say that the initial momentum of the system was zero (0), and after the burn, the total momentum of the system remains the same as the momentum of the expelled gas.

Therefore: Momentum of rocket = - momentum of expelled gas

The negative sign signifies that the rocket's momentum is in the opposite direction of the expelled gas.

Hence, the momentum of the rocket is -1500 kg m/s.

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Answer:

2.5705594546378 mol

Explanation:

Used this calculator

http://www.endmemo.com/chem/mmass.php

The genotypes of the three F2 classes is FTFT, F, FFT (in order left to right).

The forked allele is F, while the twist allele is FT. They are homozygous because, according to what we know, there exist pure lines. Therefore, FF and FTFT are the parents.

As observed in the figure, the F1 generation is both twisted and forked, indicating the codominant alleles (both are expressed).

Three different flower kinds may be found in the F2, two of which match the parental and one of which matches the F1 in terms of twisting, forking, and both.

The left-to-right order has been twisted and forked. Twisted is the genotype FTFT, while forked is the genotype FF, as far as we are aware. Both phenotypes would carry a copy of each allele, making FFT possible.

Your question is incomplete but most probably your full question was

You decide to designate the twist allele as FT to distinguish it from the forked allele F. Using the following allele symbols, identify the genotypes of the three F2 classes in Part C by dragging one label to each class. Labels can be used once, more than once, or not at all.

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The time takes for the green ball to reach the ground is equal to 0.78 s. As both balls are thrown from the same height they will take the same time to reach the ground irrespective of their velocity.

The equations of motion can be described as the equations which establish the relationship between the time, velocity, acceleration, and displacement of a moving object.

The equations of motions as the mathematical expressions:

\(v = u +at\\S = ut +(1/2)at^2\\v^2-u^2= 2aS\)

Given, the height from which the ball is thrown, h = 3

From the 2nd equation of motion, calculate the time taken by the ball reach to the ground:

H = ut + (1/2)gt²

3 = 0 + (1/2)× 9.8×t²

t = 0.78 s

As the time is independent of the velocity of a ball so both balls take the same time to reach the ground as they are thrown from the same height.

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Answer:

√(0.7 * 9.81m/s^2 * r)

Explanation:

To determine the maximum speed at which the 800kg car can travel around the curve, the engineer needs to consider the forces acting on the car as it goes around the curve. Specifically, the engineer needs to consider the centrifugal force and the frictional force between the wheels and the road.

The centrifugal force is the force that acts on an object moving in a circular path and is directed away from the center of the circle. It is given by the equation Fc = mv^2 / r, where m is the mass of the object, v is the velocity of the object, and r is the radius of the curve.

The frictional force between the wheels and the road is given by the equation Ff = μFn, where Ff is the frictional force, μ is the coefficient of friction between the wheels and the road, and Fn is the normal force between the wheels and the road. The normal force is the force that acts perpendicular to the surface of the road and is equal in magnitude to the weight of the car (mg, where g is the acceleration due to gravity).

The maximum speed at which the car can travel around the curve occurs when the centrifugal force and the frictional force are in balance, meaning that they have the same magnitude. In this case, we can set Fc = Ff and solve for v.

Substituting the given values into the equations for Fc and Ff and setting them equal to each other, we get:

Fc = Ff

mv^2 / r = μmg

Solving for v, we find that the maximum speed at which the car can travel around the curve is:

v = √(μgr)

= √(0.7 * 9.81m/s^2 * r)

This is the maximum speed at which the car can travel around the curve without sliding or losing traction. The actual value of v will depend on the radius of the curve, which is not given in the problem.

A. Doubled.

This is because according to Newton's second law of motion, the acceleration of an object is directly proportional to the force applied on it and inversely proportional to its mass. When you double the unbalanced force on an object of a given mass, the acceleration will also double. Therefore, the correct answer is A.

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Answer: Bueno no tengo idea 292

Explanation:

Answer:

Temperature: measure of the average kinetic energy of a substance

Internal energy: total potential and kinetic energies of the particles in a substance

Heat: thermal energy that flows from one substance to another

Thermal energy: part of internal energy that can be transferred

Explanation:

Proof for correct answers on edge :)

Electrons that are located in the outermost orbit in the Bohr model of a boron atom will be 3.

A nucleus with six neutrons and five protons makes up the Bohr model of boron. The K-shell and L-shell electron shells around the nucleus The valence electrons, which make up three of the electrons in the outermost shell of the Bohr diagram, are also present. The orbits of the electrons around the small nucleus are described by the Bohr model of boron.

It utilizes a number of different electron shells, including K, L, M, and N. The number of electrons that each shell can hold varies, with the shell closest to the nucleus having the least energy. The energy levels increase as the shell recedes more. According to the Bohr model, the electrons in an atom may be seen to orbit the nucleus in a variety of orbits with differing energies.

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it will avoid the sun rays from penetrating into the glass to make it hot,and even fall on the seat and burn

Explanation:

Because of the type of metal it was made with

Answer:

The car gets hot in the photograph because of greenhouse effect. Most noticeably the fact that the sunlight enters the car through the windows to heat up the inside surfaces, which then gets trapped inside the car, causing a buildup of temperature.

Sunscreen can help keep the car cool by reflecting the sunlight, which in turn reduces the amount of heat that enters the car. This also decreases the inside surfaces to the exposure of UV lights.

Pressing a lever in the box's corner is the sole method to get rid of the shocks. The rat picks up pressing the lever quite quickly. This is an illustration of negative reinforcement.

The technique of negative reinforcement can be applied to aid in teaching particular actions.

When something unpleasant or uncomfortable is taken away in response to a stimulus, this is known as negative reinforcement.

Target behavior should gradually grow better with the hope that the unpleasant item will go away.

A rat is placed in an environment where the floor gives the rat small electric shocks. The only way to get rid of the shocks is to press a lever in the corner of the box.

The rat quickly learns to press the lever. This is an example of  negative reinforcement

Hence the given condition is an example of negative reinforcement.

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Answer:

For 9 is 2,4,1 and 3.For 10 b-c moves 15 from each other and e-f moves 15 also from each other.

Answer:

c

Explanation:

An object's speed is the characteristic which is related to kinetic energy but not the potential energy. Thus, the correct option is C.

The kinetic energy of an object is the energy which it possesses due to the motion of the object. Kinetic energy is defined as the work which is needed to accelerate an object of a given mass from rest position to its stated velocity. Having gained this amount of energy during the acceleration of the object, the object maintains this kinetic energy unless its speed changes or it experiences acceleration.

Kinetic energy is directly proportional to the mass of the object and to the square of the velocity of the object, the expression is:

K.E. = 1/2 m × v²

where, KE = Kinetic energy,

m = mass of the object,

v = velocity of the object.

Therefore, the correct option is C.

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Answer:

a = 1.3 m/s2; fn = 63.1 n :)

Answer: The weight of an object is defined as the force of gravity on the object and may be calculated as the mass times the acceleration of gravity, w = mg.

Explanation:

If the student replaced the water in the calorimetry device with an ice bath at 0°C, the experimental results would differ in several ways:

Temperature Change: Instead of measuring the change in temperature of the water, the student would measure the change in temperature of the ice bath. As heat is transferred from the surroundings to the ice bath, the ice will melt and the temperature of the ice bath will increase until it reaches 0°C. The temperature change observed in the experiment would be different from that of the water bath.
Heat Capacity: The heat capacity of the ice bath would be different from that of the water bath. Ice has a lower heat capacity than water, meaning it requires less heat energy to raise its temperature. This would affect the amount of heat absorbed or released during the reaction and lead to different experimental results.
Enthalpy Change: The enthalpy change calculated from the experiment would be specific to the reaction being studied. However, the enthalpy change determined using an ice bath would be based on the heat exchange with the ice bath, rather than the water bath. The enthalpy change values would differ due to the different heat capacities and temperature changes involved.
Overall, using an ice bath instead of a water bath would result in different temperature changes, heat capacities, and enthalpy change values in the experimental results.

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Answer:

see below

Explanation:

Gases flying out at high velocity out the back  

  rocket flying forward

Answer:

this seems to not be worded right

Explanation:

Explanation: An Elliptical galaxy looks like one giant star because the stars in the elliptical galaxy are often close together, making the center seem to be one giant star.

Hope this helps

Answer:

p=I×B

Explanation:

If a current 'I' flows through a given element in your circuit, losing voltage 'V' in the process, then the power 'P' dissipated by that circuit element is the product of that current and voltage.

Answer:

Distance = speed×time = 180×3 = 540 Km

The speed v(c) of the center of mass of the system after the pod is launched is equal to v(f).

Mass of the pod, m₁ = m

Mass of the spaceship, m₂ = 6m

The conservation of momentum principle states that, within a given domain, the amount of momentum is constant such that, momentum is never created nor destroyed, but only modified by the application of forces.

So, according to the conservation of momentum, the momentum before launch and before launch must be equal. Therefore, the speed of the center of mass of the system becomes equal to the speed with which the spaceship is moving towards the right.

Therefore,

v(c) = v(f)

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a) The isocost curve equation is G = (20000 - 100C)/500. b) The isocost curve equation is G = (30000 - 100c)/500. c) The isocost curve equation is G = (20000 - 100C)/375. d)  The isocost curve equation is G = (20000 - 120C)/500.

To draw the isocost curve showing the different combinations of gas and coal, we need to use the cost per unit values for coal and gas, as well as the given expenditure (TC) and the changes in expenditure or prices.

Let's denote the quantity of coal as C and the quantity of gas as G. The cost per unit of coal is 100, and the cost per unit of gas is 500.

(a) Initial expenditure (TC) of 20000:

To find the combinations of gas and coal that can be purchased with an initial expenditure of 20000, we can use the following isocost equation

TC = 100C + 500G

We can rearrange the equation to solve for G in terms of C

G = (TC - 100C) / 500

Now we can plot the isocost curve with TC = 20000 using the equation above.

(b) Expenditure (TC) increases by 50%

If the expenditure increases by 50%, the new expenditure (TC_new) becomes 1.5 × TC = 1.5 × 20000 = 30000.

We can use the same isocost equation as before, but with the new expenditure value:

TC_new = 100C + 500G

Rearranging the equation to solve for G

G = (TC_new - 100C) / 500

Now we can plot the isocost curve with TC_new = 30000.

(c) Gas price reduced by 25%:

If the gas price is reduced by 25%, the new cost per unit of gas (Gas_new) becomes 0.75 × 500 = 375.

We can use the original isocost equation, but with the new cost per unit value:

TC = 100C + 375G

Rearranging the equation to solve for G

G = (TC - 100C) / 375

Now we can plot the isocost curve with the reduced gas price.

(d) Coal price rises by 20%

If the coal price rises by 20%, the new cost per unit of coal (Coal_new) becomes 1.2 × 100 = 120.

We can use the original isocost equation, but with the new cost per unit value:

TC = 120C + 500G

Rearranging the equation to solve for G:

G = (TC - 120C) / 500

Now we can plot the isocost curve with the increased coal price.

By plotting these isocost curves on a graph with G on the y-axis and C on the x-axis, we can visualize the different combinations of gas and coal that can be purchased at the given expenditures or price changes.

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The speed of sound would be higher if a speed of sound lab experiment was conducted at higher altitude, but the same temperature. This is because the air density is lower at higher altitudes, which means that sound waves can travel more easily and quickly through the air.

The speed of sound is dependent on the properties of the medium it travels through, such as temperature and density. In a sound lab experiment, the temperature would be kept constant, but changing the altitude would affect the density of the air. At higher altitudes, there is less air above, which means that the pressure is lower and the air molecules are further apart. This lower density allows sound waves to travel faster and with less resistance. Therefore, the speed of sound would be higher in a speed of sound lab experiment conducted at a higher altitude, but with the same temperature.

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The polar coordinates of point B(-3,4) are (5, -53.13°).

To convert rectangular coordinates B(-3,4) to polar coordinates, we need to use the following formulas:
r = √(x^2 + y^2)
θ = tan^-1(y/x)
Where r represents the distance from the origin to the point, and θ represents the angle formed by the line connecting the point and the origin with the x-axis.
Using the given rectangular coordinates, we have x = -3 and y = 4. Substituting these values into the formulas, we get:
r = √((-3)^2 + 4^2) = √(9 + 16) = √25 = 5
θ = tan^-1(4/-3) = -53.13° (rounded to two decimal places)
In summary, to convert from rectangular coordinates to polar coordinates, we need to use the formulas for r and θ, which involve calculating the distance from the origin to the point and the angle formed by the line connecting the point and the origin with the x-axis. In this case, we obtained the polar coordinates (5, -53.13°) from the given rectangular coordinates B(-3,4).

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Answer:

If you are meaning to say 214 the answer is 12840 minutes

Explanation: