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Pavlova-9 [17]
3 years ago
11

Un cilindro metálico está cerrado por un émbolo y contiene aire a 0 ºC y presión 912 mm Hg cuando el émbolo está a 50 cm del fon

do del cilindro. Si a temperatura constante el émbolo se mantiene a 30 cm del fondo la presión del interior del cilindro es (1 atm = 760 mm Hg)
Physics
1 answer:
sergij07 [2.7K]3 years ago
6 0

Answer:

Pressure inside the glass is 1520 mm Hg when it is at distance 30 cm from the base

Explanation:

As we know that here we have temperature constant condition is given

so we will have

P_1V_1 = P_2V_2

now we know that

P_1 = 912 mmHg

V_1 = 50 cm

V_2 = 30 cm

now we have

(912)(50) = P(30)

P = 1520 mmHg

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answer:

the first one  

Explanation:

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3 years ago
Calculate the angular velocity and linea­r velocity of both wheels assuming the l­arger wheel rotates at 120 revolutions p­er mi
IRINA_888 [86]
<span>120 revolutions p­er min is (20RPM)
120revolutions is 240 Pi radians (because 1 revolution is 2Pi rad)

angular velocity
w= 240Pixf, f is the frequency and f= 1/T, T =1mn=60s=period, so f=1/60=0.01Hz
so w = 240*Pi*0.01=12.56 rad /s
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3 years ago
If two cars have the same velocity do they have the same acceleration
Allisa [31]
No, if it takes less time, the acceleration is greater.

Hope this helps!
3 0
3 years ago
In her hand, a softball pitcher swings a ball of mass 0.245 kg around a vertical circular path of radius 59.8 cm before releasin
GuDViN [60]

Answer:

The velocity is v_b = 20.17 \ m/s

Explanation:

From the question we are told that

   The mass of the ball is  m = 0.245 \ kg

   The radius is  r =  59.8 \  cm  =  0.598 \ m

   The force is  F =  30.9 \ N

   The speed of the ball is  v = 16.0 \ m/s.

Generally the kinetic energy at the top of the circle is mathematically represented as

    K_t  =  \frac{1}{2} *  m  *  v^2

=> K_t  =  \frac{1}{2} *  0.245   *  16.0 ^2  

=> K_t  =  31.36 \ J  

Generally the work done by the force applied on the ball from the top to the bottom  is mathematically represented as

       W =  F *  d

Here  d is the length of  a semi - circular arc which is mathematically represented as

       d =  \pi * r

So

      W =  30.9 *  0.598

      W = 18.48 \ J

Generally the kinetic energy at the bottom is mathematically represented as

      K_b  =  \frac{1}{2} *  m *  v_b^2

=>    K_b  =  \frac{1}{2} *  0.245  *  v_b^2

=>   K_b  =  0.1225  *  v_b^2

From the law of energy conservation

     K_t +  W  =K_b

=>    31.36+  18.48 = 0.1225  *  v_b^2

=>    v_b = 20.17 \ m/s

3 0
3 years ago
How does absorption spectra occur?
Arlecino [84]

An absorption spectrum occurs when light passes through a cold, dilute gas and atoms in the gas absorb at characteristic frequencies; since the re-emitted light is unlikely to be emitted in the same direction as the absorbed photon, this gives rise to dark lines (absence of light) in the spectrum.

hope this helped :)

mark brainliest

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4 years ago
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