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Vikki [24]
2 years ago
9

A 75 kg skydiver can be modeled as a rectangular "box" with dimensions 20 cm * 40 cm * 180 cm. what is his terminal speed if he

falls feet first? use 0.8 for the drag coefficient.
Physics
1 answer:
Zina [86]2 years ago
4 0

Terminal speed=136.7 m/s

the formula for the terminal speed is given by :

V= \sqrt{\frac{2 mg}{\rho a C}}

m= mass=75 kg

a= area=0.2 x 0.4=0.08 m²

ρ= density of air=1.23 kg/m³

C= drag constant =0.8

so V= \sqrt{\frac{2 *75*9.8}{1.23*0.08*0.8}}

v= 136.7 m/s

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At what distance above earth would a satellite have a period of 125 min?
Nezavi [6.7K]
Rw^2 = GmM/r^2 
<span> Leads to 
</span><span> w^2 r^3 = GM 
</span><span> (2pi /T) ^2 r^3 = GM 
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</span><span> r^3 = GM T^2 / 4pi^2 
</span><span> Work out r^3 then r. 
</span> T = 125 min = 125(60) = 7500 s 
<span> R = 6.38E6 m 
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</span><span> G = 6.673E-11 
</span> r=<span> 8279791.78</span><span> m
 Since r = radius R of Earth + height above urface,h 
</span><span> h = r - R = </span><span> 8279791.78 - </span>6.38E6 = <span> <span>1899791.78 m
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5 0
2 years ago
Read 2 more answers
The value of (997)1/3 according to binomial theorem is
postnew [5]

Answer:

9.99

Explanation:

The value of (997)^1/3

(997)^1/3

997 = (1000 - 3)

(1000 - 3)^1/3

Expanding :

[1000(1 - 3/1000)]^1/3

1000^1/3 * (1 - 3/1000)^1/3

Cube root of 1000

10 * (1 - 3/1000 * 1/3)

10 * (1 - 1/1000)

10 * (1 - 0.001)

10(0.999)

= 9.99

Hence, the value of (997)^1/3 according to binomial theorem is 9.99

5 0
2 years ago
What is the kinetic energy of a 100 kg object that is moving with a speed of 12.5m/s
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The kinetic energy of any moving object is

                           (1/2) (mass) (speed²) .

For the object you described, that's

                            (1/2) (100 kg) (12.5 m/s)²

                         =      (50 kg)  (156.25 m²/s²)

                         =              7,812.5 joules  
______________________________

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7 0
2 years ago
Little Tammy lines up to tackle Jackson to (unsuccessfully) prove the law of conservation of momentum. Tammy’s mass is 34.0 kg a
Naily [24]

Answer:

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Explanation:

As per law of conservation of momentum we know that there is no external force on it

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now we have

m_1v_1 + m_2v_2 = 0

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8 0
1 year ago
A coworker did not clean his work area before going home this could cause an accident so you quickly clean up the next day you s
defon

Answer:

THE FIRST ONE YOU SHOULD TELL HIM AND THE LAST ONE YOU SHOUDENT DO BECAUSE HE WILL DO IT AGAIN AND EXPECT OTHERS TO CLEAN UP AFTER HIM

Explanation:

5 0
1 year ago
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