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Vladimir79 [104]
3 years ago
5

1. Mendeleev arranged the known chemical elements in a table according to

Physics
2 answers:
marin [14]3 years ago
8 0

Answer:

a

Explanation:

Mendleev arranged the known chemical elements in the periodic table according to increasing atomic no.

V125BC [204]3 years ago
3 0

Answer:

the answer is A

Explanation:

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20 kg object travels 28 meter and stops. coefficient friction= 0.085 how much work was done by friction?
Tresset [83]
Assuming it is on a horizontal surface:
friction = μR
R = 20g (g is gravity 9.81)
so Friction = 0.085 x 20g
Work done is force x distance 
so Work done = 0.085 x 20g x 28
 = 466.956 J

7 0
3 years ago
Convert 2 days into second​
eduard

Answer:

<em><u>172,000 second </u></em>

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3 0
3 years ago
Read 2 more answers
What is dark energy? How is dark energy related to the theory of the multiverse?
olga55 [171]

Answer:

In the 1980s, astronomers turned to multiverse theory to explain the “luckily small” amount of dark energy in our universe. According to cosmologist's theories, this small amount of dark energy appeared to enable our universe to host life, while most universes in the multiverse couldn't.

Explanation:

4 0
3 years ago
A child rides the train at Disneyland which takes him in a loop around the amusement park at a speed of 3 m/s. Which statement b
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The velocity is a vectorial quantity, whereas speed is a scalar quantity, meaning it depends on the direction!
As such, the velocity is changing because the direction is changing.
6 0
3 years ago
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Distance travelled by a free falling object in the first second is: a) 4.9m b) 9.8m c) 19.6m d) 10m​
zvonat [6]
  • Time=1s=t
  • Acceleration due to gravity=g=9.8m/s^2
  • Distance=s

In free fall

\boxed{\sf s=-\dfrac{1}{2}gt^2}

\\ \sf\longmapsto s=-\dfrac{1}{2}\times 9.8(1)^2

\\ \sf\longmapsto s=-4.9(1)

\\ \sf\longmapsto s=-4.9m

  • Take it positive

\\ \sf\longmapsto s=4.9m

  • Option a is correct
6 0
2 years ago
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