Air entering the potential space of the pleural cavity is called

Answers

Answer 1
Answer: Air  entering the  potential space of  the  pleural cavity is  called  pneumothorax. 

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It takes 167 kJ of work to accelerate a car from 20.9 m/s to 27.9 m/s. What is the car's mass?
Evelyn learns that a sound wave can be recorded electronically as an analog signal or as a digital signal. She investigates these two signal types. She records her voice using a tape recorder, which uses an analog signal to produce sound when played back. She also records her voice using a computer, which uses a digital signal to produce sound when played back. Evelyn replays each recording 100 times.a. Describe a difference that Evelyn would most likely hear between the two recordings after being replayed 100 times.b. Explain why the two recordings would sound different after being replayed 100 times.
What is elastic potential energy
Which element of art creates edges of shapes and visual cues for the viewer in terms of both motion and space?a. emphasis b. form c. line d. unity
Football player A has a mass of 210 pounds and is running at a rate of 5.0 mi/hr. He collides with player B. Player B has a mass of 190 pounds and is running in the same direction at 3.0 mi/hr. Which of the following statements is true?-The momentum of player A is equal to that of player B. -The momentum of player A is greater than that of player B. -The momentum of player A is less than that of player B.

Which of the following terms describes the motion of particles during the transmission of wave energy?non-recurrent
arbitrary
periodic
unpredictable

Answers

The term that describes a wave energy from the choice is periodic. Wave energy occurs at intervals thus periodic. The main properties of a wave energy are the amplitude, wavelength, frequency and speed. Also, period is a property where it is defined as the time it takes for one complete wave to pass a certain point. 

Answer:

periodic

Explanation:

You own a high speed digital camera that can take a picture every 0.5 seconds. You decide to take a picture every 0.5 seconds of your physics teacher as she drops a watermelon off the top of the school. After you develop and analyze the pictures, you realize that the distance the watermelon falls from the teacher in each new picture isA) the same in each picture.
B) gradually less in each picture.
C) gradually more in each picture.
D) proportional to the mass of the watermelon.

Answers

-- There is no need to develop the pictures.  They are available immediately in a digital camera.

-- There is no change in the teacher from one picture to the next.

-- The distance the watermelon falls from the teacher in each new picture is more in each picture than in the picture before it. (C)


A 0.15-kg ball is thrown into the air and rises to a height of 20.0 m. How much kinetic energy did the ball initially have?

Answers

IF the toss was straight upward, then the kinetic energy it got
from the toss is the gravitational potential energy it has at the top,
where it stops rising and starts falling.

Potential energy =  (mass)  x   (gravity) x (height)

                           = (0.15 kg) x (9.8 m/s²) x (20 m)

                           =      29.4 kg-m²/s²  =  29.4 joules .
The conservation of energy says that energy in an isolated system remains constant, that it is not created nor destroyed but transforms from one form of energy to another. 
So when the ball is thrown into the air, it has kinetic energy (KE). As it goes into the air, that kinetic energy transforms into gravitational potential energy (GPE). The higher it gets, the more GPE it has and therefore the less KE it has. 
At the top, all of it is transformed into GPE and there is no KE.
But total energy at any point after the ball is thrown until it lands it has the same energy throughout. 

Knowing this, you can set the beginning KE equal to the final GPE. 
KE = GPE

Insert formula for GPE.

KE = mgh
KE = 0.15kg*9.8m/s^2*20.0m
KE = 29 J

The ball initially had 29 J of kinetic energy

What fuel(s) are the main energy source during short, intense bursts of exercise?Metabolism of protein only
Metabolism of fat only
Metabolism of carbohydrate only
Carbohydrates and vitamins
Caffeine
Medium-chain triglycerides
Erythropoietin
Carnitine

Answers

The answer is Metabolism of carbohydrate only. Remember that metaolism is the set of biochemical reactions that occur in the living organism to obtainn energy from food. The most important carbohydrate is glucose. Glucose readily oxydizes into CO2 and water and produces energy.

The steering wheel of a certain vehicle has a diameter of 34.6 cm, and it turns a shaft that is 8.9 cm in diameter. If a 94.8 N force is needed to turn the steering wheel, what torque is exerted on the wheel

Answers

Answer: 164Nm

Explanation: the torque exerted on the wheel is given by the expression

Torque=force*radius(of steering wheel )

Given force =94.8N

Diameter of wheel=34.6cm

Radius =34.6/2 =17.3cm

to metre 17.3/10= 1.73m

Torque =94.8*1.73

=164Nm

The Universal Law of Gravity states that the force of gravity acts between all objects. Nonetheless, you never feel that the fridge in your kitchen pulls you toward it. Why?

Answers

If your mass is 50 kg (you weigh 110 pounds), and the mass of the refrigerator
is 100 kg (it weighs 220 pounds), and you're standing so that the center of
the frig and the center of you are 1 meter apart (about 3 feet), then the force
of gravity between you and the frig is about 0.0000012 ounce.  That's why.