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sergeinik [125]
3 years ago
10

At an atmospheric pressure of 870 mm Hg with 21 percent oxygen, the partial pressure of oxygen is _____.A) 219 mm HgB) 127 mm Hg

C) 151 mm HgD) 182 mm HgE) 100 mm Hg
Physics
1 answer:
Sergeu [11.5K]3 years ago
7 0

Answer:

d) 182 mm Hg

Explanation:

The ratio of partial pressure to total pressure is equal to the molar ratio.

P / 870 mm Hg = 0.21

P = 182 mm Hg

Answer is D.

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If the 140 g ball is moving horizontally at 25 m/s , and the catch is made when the ballplayer is at the highest point of his le
sweet [91]

(.140*25)+(75*0)= 3.5

3.5 = (.140 + 75)v

(3.5)/(.140 + 75) = v = .04657

which rounds up to .05 m/s

7 0
4 years ago
In damped harmonic oscillation, the amplitude of oscillation becomes one third after 2 second. If A0 is initial amplitude of osc
Harman [31]

Answer:

A=\frac{A_0}{\sqrt 3}

Explanation:

Initial amplitude=A_0

We are given that

Amplitude after 2 s=A=\frac{1}{3}A_0

We have to find the amplitude after 1 s.

We know that amplitude at any time t

A=A_0e^{-\alpha t}

Using the formula

\frac{A_0}{3}=A_0e^{-2\alpha}

\frac{1}{3}=e^{-2\alpha}

3=e^{2\alpha}

ln 3=2\alpha

\alpha =\frac{ln 3}{2}=ln\sqrt 3

e^{\alpha}=\sqrt 3}

When t=1 s

A=A_0e^{-\alpha}=\frac{A_0}{\sqrt 3}

8 0
4 years ago
If the velocity of a pitched ball has a magnitude of 47.0 m/s and the batted ball's velocity is 55.0 m/s in the opposite directi
Naddik [55]

Answer:

14.79 kgm/s

Explanation:

Data provided in the question

Let us assume the mass of baseball =  m = 0.145 kg

The Initial velocity of pitched ball = v_i = 47 m/s

Final velocity of batted ball in the opposite direction = v_f= -55m/s

Based on the above information, the change in momentum is

\Delta P = m(v_f -v_i)

=  0.145 kg(-55m/s - 47m/s)    

= 14.79 kgm/s

Hence, the magnitude of the change in momentum of the ball is 14.79 kg m/s

3 0
3 years ago
How are sublimation and deposition different from each other
yanalaym [24]
There are six distinct changes of phase which happens to different substances at different temperatures. ... Sublimation: the substance changes directly from a solid to a gas without going through the liquid phase. Deposition: the substance changes directly from a gas to a solid without going through the liquid phase.

Hope u find this helpful
3 0
4 years ago
Explain how the theory of the Sun’s dynamo results in an average 22-year solar activity cycle. Include the location and mechanis
horrorfan [7]

Answer:

Explanation:

Sun's dynamo means the process that produce Sun's magnetic field.

The mechanism inside a Sun acts like a generator that produces electric current and magnetic field.

Magnetic field with in the Sun are extended out and around. Magnetic field of lines get twisted due to rotation of Sun.

The material that flows inside the Sun plays an important role in Sun's dynamo. At surface the flow rate is about 20 m/s but as it moves towards equator, it becomes way too slow taking about 11 years of time.

Due to the this magnetic field, several sun spots are formed on the surface.

The number of sunspots keep on changing from minimum to maximum number resulting into change in the magnetic pole. In each cycle polarity get reversed hence the overall magnetic cycle has an interval of 22 years.

5 0
3 years ago
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