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Igoryamba
3 years ago
13

what did taking measurements reveal about the velocity of the fireball? Was the fireball’s velocity constant or changing?

Physics
1 answer:
Salsk061 [2.6K]3 years ago
7 0

Answer:

The fireball slows down when moving upward. It speeds up when moving downward. So, its velocity is always changing.

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A piston-cylinder device initially contains 0.08 m3 of nitrogen gas at 150 kPa and 200°C. The nitrogen is now expanded to a pres
Lemur [1.5K]

Answer:

V_2 = 0.125 m^3

Work done =  = 5 kJ

Explanation:

Given data:

volume of nitrogen v_1 = 0.08 m^3

P_1 = 150 kPa

T_1 = 200 degree celcius = 473 Kelvin

P_2 = 80 kPa

Polytropic exponent n = 1.4

\frac{T_2}{T_1} = [\frac{P_2}{P_1}]^{\frac{n-1}{n}

putting all value

\frac{T_2}{473} = [\frac{80}{150}]^{\frac{1.4-1}{1.4}

\frac{T_2} = 395.23 K = 122.08 DEGREE \ CELCIUS

polytropic process is given as

P_1 V_1^n = P_2 V_2^n

150\times 0.08^{1.4} = 80 \times V_2^{1.4}

V_2 = 0.125 m^3

work done = \frac{P_1 V_1 -P_2 V_2}{n-1}

= \frac{150 \times 0.8 - 80 \times 0.125}{1.4-1}

                  = 5 kJ

4 0
3 years ago
The second minimum in the diffraction pattern of a 0.11-mm-wide slit occurs at 0.72°. What is the wavelength of the light?
Anit [1.1K]

Answer:

691.13 nm

Explanation:

d = width of the slit = 0.11 x 10⁻³ m

θ = angle of diffraction pattern = 0.72° degree

λ = wavelength of the light = ?

m = order = 2                              (since second minimum)

for the second minimum diffraction pattern we use the equation

d Sinθ = m λ

Inserting the values

(0.11 x 10⁻³) Sin0.72 = (2) λ

λ = 691.13 x 10⁻⁹ m

λ = 691.13 nm

6 0
3 years ago
When I double displacement reaction takes place, one of the products must be_______.
sattari [20]

Answer:

the answer would be Salt

Explanation:

3 0
3 years ago
Read 2 more answers
Is it polar or non-polar... i need help on all of them plz hurry
Murljashka [212]
Answers

1.) non-polar

2.) non-polar

3.) Polar

4.) Polar

Non-polar molecules are essentially molecules that have an even distribution of of electrical charges.

Polar molecules is the separation of electric charges, having one positive end and another negative end.
5 0
3 years ago
A graph titled Position versus time for with horizontal axis time (seconds) and vertical axis position (meters). A straight blue
ankoles [38]

Answer:

starting position: 3 m

velocity: 3 m/s

Explanation:

at t=0 position= 3 m

velocity: (delta)position/(delta)time

(delta=change in)

velocity= (15-3)/(4-0)

velocity= 12/4

velocity= 3 m/s

6 0
3 years ago
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