What is the specific formula for Air Quality Index (AQI)? and how is it calculated ?

I want to know specifically about it and is there anyone who is expert in aerosol physics. i am doing my thesis in aerosol physics so i need to take some lessons on particular topics.

thank you in advance.

An electric eel generates electric currents through its highly specialized Hunter's organ, in which thousands of disk-shaped cells called electrocytes are lined up in series, very much in the same way batteries are lined up inside a flashlight. When activated, each electrocyte can maintain a potential difference of about 150 mV at a current of 1 A for about 2.0 ms. Suppose a grown electric eel has 3.50 ✕ 103 electrocytes and can deliver up to 300 shocks in rapid series over about 1 s.

a)What maximum electrical power can an electric eel generate?

b)Approximately how much energy does it release in two shocks?

c)How high would a mass of 3 kg have to be lifted so that its gravitational potential energy equals the energy released in 300 such shocks?

I want you guys to rewrite this lab procedure, and it is fine if it was shorter than this.

An air track was fitted with two photocell bridges, one on each side of the collision region. Each bridge was operating in a gate mode timer that allows the collection of time intervals before and after collision. To ensure that friction and gravity have minimal effects, the track was leveled. Before starting the experiment, we ensured that loss in velocity was no greater than two percent in either direction. To check this, we sent one glider in one direction and noted the time to cross each photocell placed one meter apart. The difference between the two times divided by the time to cross the first photocell was the fraction of momentum that was lost due to friction and gained or lost due to gravity. The track was readjusted accordingly and the check was repeated in the other direction.

The first step in starting the experiment was measuring the masses of the two gliders (i.e. the heavy glider and the light glider). The masses of the gliders were made “heavy” or “light” by adding trimming weights. Then, a series of four collisions (each repeated three times) were conducted

“H” indicates heavy glider, “L” indicates light glider, “Off” indicates that the collision was made elastic by facing the bumpers toward one another, and “On” indicates that the collision was made inelastic by the mounting the “sticky bumpers” on each end (i.e. pin and putty attachments).

Using the memory mode of the photoelectric timers, we were able to collect times for both instances (before and after collision) that that glider past the photobridges. The first data point was our first time point and the second data point was the total of the first and second time point. Therefore, to get the second time, we had to subtract the first time point from the second data point. These times were then used to caluculate the velocities and subsequently the momentum and kinetic energy of both gliders.

Why is the GM detector not capable of discriminating between different forms of radiation?

Remarks It's interesting that the final result depends only on the coefficient of static friction. Notice also how similar Equations (1) and (2) are to the equations developed in previous problems. Recognizing such patterns is key to solving problems successfully.

Question A larger static friction constant would result in a: (Select all that apply.)

a) smaller component of gravitational force along the ramp at the maximum angle.

b) larger maximum angle.

c)smaller maximum angle.

d)larger component of gravitational force along the ramp at the maximum angle.

e)larger component of normal force at the maximum angle.

PRACTICE IT Use the worked example above to help you solve this problem. Suppose a block with mass 2.80 kg is resting on a ramp. If the coefficient of static friction between the block and the ramp is 0.420, what maximum angle can the ramp make with the horizontal before the block starts to slip down?

EXERCISE Use the values from PRACTICE IT to help you work this exercise. The ramp in the figure is roughed up and the experiment repeated.

(a) What is the new coefficient of static friction if the maximum angle turns out to be 38.0°?

(b) Find the maximum static friction force that acts on the block.
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Write a 5-10 sentence conclusion describing the changes in temperature for a solid, liquid, and gas affect the amount of energy and types of motion that each phase has and the randomness of motion. Use some of the observations to justify your conclusion.  

A rock sample is placed in a strength-testing machine at atmospheric pressure and is compressed axially to failure. A force of 12,000 Ibf was required for rock failure, and the cross- sectional area of the sample were 2.0 sq in. The sample failed along a plane that marks a 35 angle with the direction of compressional loading A) Construct the Mohr's circle using the two principal stresses present B) Compute the shear stress present along the plane of failure C) Compute the normal stress to the plane of failure. D) Compute the angle of internal friction. E) Compute the cohesive resistance of the material. F)Label the parameters computed in the previous four steps on the Mohr's circle construction. Using the Mohr criterion, compute the compressional force required for rock failure if the sample is placed under a 5,000-psi confining pressure.

a Ball is thrown upward from the top of a 23.5 m building with a speed of 12.4 m/s. ignore air resistance

A) draw and label a figure with a coordinate system showing the balls initial position and initial velocity.

B) write down the proper equations of motion and replace all known initial conditions and constant values with their appropriate numerical values to find the following

C)to what maximum height above the ground will the ball rise?

D) how much time does it take the ball to reach this maximum height?

E) what is the acceleration of the ball when it reaches this highest point?

F) How much time does it take the ball to fall from the top to the ground?

G) With what speed does the ball hit the ground?

H) With what velocity does the ball hit the ground?

. Light travels at different speeds through materials due the refractive index of that material. Given that I have a transparent polymer material, would light travel faster or slower through it if it (a) have zero stress on it or (b) have a substantial, but still elastic, stress on it (say 20 MPa for HDPE)? Explain.

In radiation safety classes, it is stressed that the amount of radiation that a person receives is to be ALARA (As Low As Reasonably Achievable). Explain how distance, shielding and time meet this goal.

1.As a result of any natural process, the total entropy of any system plus that of its environment As a result of any natural process, the total entropy of any system plus that of its environment?

A) always stays the same. B) sometimes decreases. C) never decreases. D) never increases.

2.According to the second law of thermodynamics, the entropy of any system always increases. According to the second law of thermodynamics, the entropy of any system always increases.

A)True B)False

3. An ice cube at 0°C is placed in a very large bathtub filled with water at 30°C and allowed to melt, causing no appreciable change in the temperature of the bath water. Which one of the following statements is true?

A)The entropy of the system (ice plus water) increases because the process is irreversible.

B)The entropy lost by the ice cube is equal to the entropy gained by the water.

C)The net entropy change of the system (ice plus water) is zero because no heat was added to the system. D)The entropy gained by the ice cube is equal to the entropy lost by the water.

E)The entropy of the water does not change because its temperature did not change.

4.An engine manufacturer makes the claim that the engine they have developed will, on each cycle, take 100J of heat out of boiling water at 100∘C, do mechanical work of 80J, and exhaust 20J of heat at 10∘C. What, if anything, is wrong with this claim?

A)There is nothing wrong with this claim because 100J=20J +80 J.

B)An engine would operate by taking in heat at the lower temperature and exhausting heat at the higher temperature.

C)The efficiency of this engine is greater than the ideal Carnot cycle efficiency.

D)This engine violates the first law of thermodynamics because 100 J +20J ≠ 80 J.

E)The heat exhausted must always be greater than the work done according to the second law of thermodynamics.

Describe the process of “magnetic cooling” (adiabatic demagnetization) for a paramagnetic salt in words (how and why does it work?).

Illustrate this process in an entropy - temperature diagram.

Describe the formation and travel direction (and why) of a North Atlantic hurricane that might impact North America

Heat flows from a reservoir at 373 K to a reservoir at 273 K through a 0.39-m copper [thermal conductivity 390 J/(s