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kirza4 [7]
3 years ago
5

Scientists believe Earth is about how many billion years old

Physics
2 answers:
ehidna [41]3 years ago
7 0
The earth is 4.54 billion years old.
ivolga24 [154]3 years ago
5 0
Scientists believe the earth is about 4 billion years old. But it's not true. It is really only 6,000 years old.
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For the hypothetical reaction A → B, calculate the average rate of disappearance of A if the initial concentration of A is 0.91
marishachu [46]

Answer:

The right answer is 8.9 x 10^-3 M/min

Explanation:

           A → B

-d [A]/dt  = K [A]

ΔA/Δt     = - (C2 -C1)/t2 - t1

               = - (0.11 - 0.91)/90

               = 8.9 x 10^-3 M/min

7 0
3 years ago
Match these items and the phrases with which they are associated.
amid [387]
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3 years ago
How might the distance between the needle and the water droplets have affected the movement of the droplets?
shutvik [7]

Answer:

The behavior of droplets trapped in geometric structures is essential to droplet manipulation applications such as for droplet transport. Here we show that directional droplet movement can be realized by a V-shaped groove with the movement direction controlled by adjusting the surface wettability of the groove inner wall and the cross sectional angle of the groove. Experiments and analyses show that a droplet in a superhydrophobic groove translates from the immersed state to the suspended state as the cross sectional angle of the groove decreases and the suspended droplet departs from the groove bottom as the droplet volume increases. We also demonstrate that this simple grooved structure can be used to separate a water-oil mixture and generate droplets with the desired sizes. The structural effect actuated droplet movements provide a controllable droplet transport method which can be used in a wide range of droplet manipulation applications.

Explanation:

BOOM NOW I WINNNNNNNNNNNn

5 0
3 years ago
Read 2 more answers
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Talja [164]
I would say B.
I hope this helps!
7 0
3 years ago
Two animals that can be found at the Grand Canyon include the Abert’s and Kaibab squirrels. The Abert’s squirrel is found at the
Tom [10]
D. <span>When placed together in pairs for study, no pair of Abert's squirrel and Kaibab squirrel result in offspring.</span>
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3 years ago
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