A beam of light crosses a boundary between two different media. Refraction can occur ifthe angle of incidence is O Degreesall of the light is refractedthe media have different indices of refractionthere is no change in the speed of the wave

The scale would read a force of 182 N in the upward direction.

When the elevator slows to a stop, its acceleration is negative and has a magnitude of 2.6 m/s^2. The force that the scale reads is equal in magnitude but opposite in direction to the net force acting on the person inside the elevator.

Using Newton's second law of motion, we can find the net force as follows:

F_net = m*a

where F_net is the net force, m is the mass of the person, and a is the acceleration of the elevator.

Assuming a mass of 70 kg for the person, we get:

F_net = (70 kg)(-2.6 m/s^2) = -182 N

So the scale would read a force of 182 N in the upward direction.

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The process of gas exchange, specifically in the alveoli of the lungs, relies on partial pressure gradients.

During respiration, oxygen is taken in from the atmosphere, and carbon dioxide is expelled. The exchange of these gases occurs at the alveoli, which are tiny air sacs in the lungs. The driving force for gas exchange in the alveoli is the partial pressure gradient.

Partial pressure is the pressure exerted by a specific gas in a mixture of gases. In the alveoli, oxygen moves from the alveolar air into the bloodstream, while carbon dioxide moves from the bloodstream into the alveolar air.

The partial pressure gradient allows for the passive diffusion of gases across the respiratory membrane.

The efficient and effective exchange of oxygen and carbon dioxide in the lungs enables adequate oxygen supply and efficient waste gas removal in the body.

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The process of respiration that relies on partial pressure gradients is both external respiration and internal respiration. During external respiration, oxygen moves from an area of higher partial pressure (such as the lungs) to an area of lower partial pressure (such as the blood), while carbon dioxide moves in the opposite direction. In internal respiration, oxygen moves from the blood to the body's tissues, and carbon dioxide moves from the tissues to the blood.

In the process of respiration, there are two main types: external respiration and internal respiration. External respiration refers to the exchange of gases between the lungs and the blood, while internal respiration involves the exchange of gases between the blood and the body's tissues.

Both processes rely on partial pressure gradients to facilitate the movement of gases across cell membranes. The partial pressure of a gas is the pressure exerted by that gas in a mixture of gases. It determines the direction and rate of gas diffusion.

During external respiration, oxygen moves from an area of higher partial pressure (such as the lungs) to an area of lower partial pressure (such as the blood). This allows oxygen to enter the bloodstream and be transported to the body's tissues. At the same time, carbon dioxide, which has a higher partial pressure in the blood, moves from the blood to the lungs, where it can be exhaled.

During internal respiration, oxygen moves from the blood to the body's tissues, where it is needed for cellular respiration. Carbon dioxide, produced as a waste product of cellular respiration, moves from the tissues to the blood, where it can be transported back to the lungs for exhalation.

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The work done in changing the volume is 5922 Joules.

The net work done in a thermodynamic system can be defined as the energy used in changing  the volume of the gas Here the pressure is kept constant ( as in this case volume is treated as an independent quantity )and the volume changes.

So we can write the formula of work done as

dW = PΔV

To find the net work done we integrate both sides within given limits

We have

P = 15.0 atm = 14101.5 x 10³ Pascals

V1 = 0.180 liters

V2 = 0.600 liters

Therefore integrating both sides

W = ܂ ∫ PdV ( from v1 to v2 )

W = 14101.5 x 10³  x  (0.600 - 0.180 )(1/1000)

W =14101.5 x 10³ x  0.420 x (1/1000) =5922 J

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Answer:

7.27 m/s

Explanation:

40/5.5 = 7.27m/s

Answer:

Scattering of light is the phenomenon in which light rays get deviated from its straight path on striking an obstacle like dust or gas molecules, water vapours etc. Scattering of light gives rise to many spectacular phenomena such as Tyndall effect and the “red hues of sunrise and sunset”.

Answer:

No

Explanation:

I dont know please help

Answer:

C = 1.01

Explanation:

Given that,

Mass, m = 75 kg

The terminal velocity of the mass, \(v_t=60\ m/s\)

Area of cross section, \(A=0.33\ m^2\)

We need to find the drag coefficient. At terminal velocity, the weight is balanced by the drag on the object. So,

R = W

or

\(\dfrac{1}{2}\rho CAv_t^2=mg\)

Where

\(\rho\) is the density of air = 1.225 kg/m³

C is drag coefficient

So,

\(C=\dfrac{2mg}{\rho Av_t^2}\\\\C=\dfrac{2\times 75\times 9.8}{1.225\times 0.33\times (60)^2}\\\\C=1.01\)

So, the drag coefficient is 1.01.

Answer:

231 C final temperature, 211 C change in temperature

Explanation:

To solve this problem you you use the q=MCΔT equation, where q is heat, m is mass, c is specific heat, and ΔT is change in temperature. Since we're given heat and solving for temperature we rearrange the equation to q/(M*C)=ΔT. At this point we simply plug in the given values to get a ΔT of 211, but this is simply the change in temperature so you add the initial to this to get the final temp.

(d) 50N/C

The magnitude of the electric field at point 'P' is 50N/C.

It is derived from the basic concepts of Electrostatics. Coulomb's Law is the basis of relations in Electrostatics. It resembles Newton's Law of Gravitation.

Using the relation between Electric force, charge, and Electric field:

                                          F = qE

                                     200 = (4)E

                                          E = 50N/C  

It is widely used in the calculation of Electric Force and Electric Field. The S.I. Unit of the Electric Force is Newton. The S.I. Unit of the Electric Field is N/C. The S.I. Unit of charge is Coulomb.

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Answer:

option d is your answer

Explanation:

you can find the complete solution in the given attachment

I hope it helped you

Answer:

D is the correct answer for this question.

Explanation:

I had done this already

The rest energy of the proton is 900 MeV.

We need to know about relativistic energy to solve this problem. The rest energy of the object can be determined by

Eo = m₀ . c²

where Eo is rest energy, m₀ is rest mass and c is speed of light (3 x 10⁸ m/s).

From the question above, we know that :

m₀ = 1.6 x 10¯²⁷ kg

c = 3 x 10⁸ m/s

By substituting the following parameter, we get

Eo = m₀ . c²

Eo = 1.6 x 10¯²⁷ . (3 x 10⁸)²

Eo = 1.44 x 10¯¹⁰ joule

Eo = 1.44 x 10¯¹⁰ / (1.6 x 10¯¹⁹) eV

Eo = 900 x 10⁶ eV

Eo = 900 MeV

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Answer: A basketball is something that can have a physical or chemical change done to it.

Explanation:

A basketball is made of matter. The fire itself is not a matter however, the wood that burns is matter. A basketball is very different from a fire because a basketball has some mass in it on the other hand fire does not contain any mass

Anything which has mass and occupies space is known as matter, mainly there are four states of matter solid liquid gas, and plasma.

These different states of matter have different characteristics according to which they vary their volume and shape.

For any substance to be considered as matter it must have to contain some mass and occupies some space.

As given in the problem statement a basketball is made of matter. The fire itself is not a matter however, the wood that burns is matter. A basketball is very different from a fire because a basketball has some mass in it on the other hand fire does not contain any mass.

For any substance to be considered as matter it must have to contain some mass and occupies some space.

Thus, a basketball is considered a matter but fire is not considered a form of matter.

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Answer: Ionisation is the process of an atom gets a negative or a positive charge by gaining or losing electrons. The result is an ion.

Explanation: Thats why

Answer:

0n

Explanation:

Answer:

Opción A - Difracción

Explanation:

Mirando las opciones, la respuesta correcta es la difracción.

Esto se debe a que la difracción es simplemente la propagación de las olas alrededor de los obstáculos.

Por ejemplo, si estuviera afuera de una puerta abierta, aún podría escuchar porque la arena se extenderá desde la pequeña abertura como si fuera una fuente localizada de arena.

Esto es posible debido al fenómeno llamado difracción.

Answer:

The answer is below

Explanation:

Because of the resistance of transmission lines, high current along the line leads to large voltage drop. This voltage drop causes low efficiency because the voltage at the receiving end is far less than that at the sending end.

Therefore there is need to transmit at a higher voltage (smaller current) than that required by distribution because of efficiency.

Hence, For safety and efficiency, the voltage must be large in the transmission lines and small in the distribution lines.

Answer:

the symbol stands for cell

Answer:

True

True

Explanation:

Answer:

Aeroplane

Explanation:

they have tail surfaces to stabilize the wings

Answer:

C A B D E

Explanation:

The newest rocks are always on top, and the oldest rocks are on the bottom.

C. 305 million

A. 200 million

B. 68 million

D. 3 million

E. 800 thousand

Answer:

30.95 cm

Explanation:

The focal length f, the object distance do, and the image distance di are related with the following equation:

So, replacing the values, we get:

Then, solving for di, we get:

Therefore, the image distance is 30.95 cm

An Atwood's machine is a device used to analyze the movement of two masses with a pulley that acts as a point of rotation. The movement of two masses in an Atwood's machine can be used to determine the magnitude of the acceleration due to gravity.

The modified Atwood machine is similar to the Atwood's machine except that it uses a cart rather than a hanging mass. The acceleration of a modified Atwood machine with a cart mass of 4 kg and a hanging mass of 1 kg can be determined using the following equation:`a = (m1 - m2)g / (m1 + m2)`where a is the acceleration, m1 is the mass of the cart, m2 is the mass of the hanging weight, and g is the acceleration due to gravity.

The value of g is 9.8 m/s². The mass of the cart is 4 kg and the mass of the hanging weight is 1 kg, therefore:m1 = 4 kgm2 = 1 kgg = 9.8 m/s²Substitute these values into the equation:`a = (m1 - m2)g / (m1 + m2) = (4 - 1) x 9.8 / (4 + 1) = 2.94 m/s²`Therefore, the magnitude of the acceleration of a modified Atwood machine with a cart mass of 4 kg and a hanging mass of 1 kg is 2.94 m/s².

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During this interval of inattention, you go around 252 metres.

Determine the speed in metres per second.

Speed in km/h = 90 km/h

1 km/h = 1000/3600 m/s

Speed in m/s = 90 x 1000/3600 = 25 m/s

Determine the time in seconds.

Time = 2.8 s

Figure out the distance.

Distance = Speed x Time

Distance = 25 m/s x 2.8 s

Distance = 70 m

Do the conversion from feet to kilometres.

1 km = 1000 m

Distance in km = 70/1000 = 0.07 km

Determine the distance in metres.

1 km = 1000 m

Distance in m = 0.07 x 1000 = 70 m

Determine the total distance that was covered during the inattentive period.

Total Distance = Distance traveled before inattention + Distance traveled during inattention

Total Distance = 90 x 2.8 + 70

Total Distance = 252 m

Throughout this period of inattention, you move around 252 metres.

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Answer:

Explanation:

Light gets reflected by a medium of higher  refractive index and then from a medium of lower refractive index a second time  so there will  be an additional phase difference of 180⁰.

For constructive interference in thin films  the condition is as follows .

2μd = (2n+1) λ/2

where μ is 1.56 , d is 80 nm λ is wave length of ligh and n is an integer .

For longest wavelength , n = 0

λ = 4μd

= 4 x 1.56 x 80 nm

= 499.2  nm .

Answer:

From what I see, it's saying that every minute, the ant can move 30 meters.  So how many meter would it move in 45 minutes?

30 meters = 1 min

x meters = 45 min

1 min x 45 = 45 min

30 meters x 45 = 1,350 meters

So, I believe the answer would be 1,350 meters.

hope this helps. :>