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Vladimir [108]
3 years ago
14

Given the model h(t)=-16t^2-5t+2 are you throwing up or down?

Physics
1 answer:
Burka [1]3 years ago
5 0

Given a model that looks like that, I do experience severe upset. I'm not throwing up yet, but it's only a matter of time.

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A girl runs and cover a distance of 200m in 20 secends.The speed of the girl is ................ m/s.
Mademuasel [1]

Speed = distance/time

Speed = (200m)/(20s)

Speed = 10 m/s

4 0
3 years ago
Be sure to answer all parts. By what factor does the fraction of collisions with energy equal to or greater than activation ener
qwelly [4]

Answer:

Factor = 8.77

Explanation:

Fraction of collision with energy greater than or equal to the activation energy  can be given by the formula:

f = \exp(\frac{-E_{a} }{RT} )

E_{a}  = Activation Energy\\E_{a}  = 100 kJ /mol\\E_{a}  = 10^{5} J /mol\\

R = 8.314 J/mol.K

When Temperature = 34⁰C = 34 + 273 = 307 K

f_{1}  = \exp(\frac{-10^{5}  }{8.314 * 307} )\\f_{1} = \exp(\frac{-10^{5}  }{2552.398} )\\f_{1}  = \exp(-39.18)\\f_{1} = 964.59 * 10^{-20}

When Temperature =  52⁰C = 52 + 273 = 325 K

f_{2}  = \exp(\frac{-10^{5}  }{8.314 * 325} )\\f_{2}= \exp(\frac{-10^{5}  }{2702.05} )\\f_{2}= \exp(-37.009)\\f_{2} = 8456.6 * 10^{-20}

\frac{f_{2}}{f_{1}}= \frac{8456.6 * 10^{-20} }{964.59 * 10^{-20} }

Factor = 8.77

8 0
4 years ago
Explain the difference between reversible and irreversible
kirza4 [7]

Answer:

The difference between reversible and irreversible is reversible can be changed but irreversible can not.

7 0
3 years ago
Describe how positive and negatives pairs will react?
oksian1 [2.3K]
Positive will react better together. But opposites will try to get as far away as possible.
6 0
4 years ago
Show that atmosphere exerts pressure.
Maru [420]

Because gas particles in the air like particles of all fluids are constantly moving and bumping into things, they exert pressure. The pressure exerted by the air in the atmosphere is greater close to Earth's surface and decreases as you go higher above the surface.

<u>Explanation</u>:

  • Fill roughly one-third of a cup with water. Then, cover the mouth of the cup completely with a flat, hard cardboard. Using your hand to keep it in place, turn the cup upside down. When you remove your hand, the the cardboard stays in place.
  • One would expect that due to gravity, the water will fall, and even the cardboard will. However, it does not, which means that something must be applying an upward force on the cardboard. This is nothing other than air pressure, which applies a force across the surface of the cardboard in an upward direction.
  • Thus we can demonstrate that air exerts pressure, because otherwise, the water would have fallen.
3 0
3 years ago
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