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MAVERICK [17]
2 years ago
14

How was Mendeleev first periodic table like the periodic table today

Physics
1 answer:
Mila [183]2 years ago
5 0

Answer:

He began organizing the known elements according to their atomic weights and chemical properties.

Explanation:

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Centripital acceleration. When an object moves in a circle, centripital acceleration acts to accelerate the object towards the center of that circle
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How would the number 13,900 be written using scientific notation?
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um d. but I am guessing this ans

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Describe how elements are formed in stars.
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Stars create new elements in their cores by squeezing elements together in a process called nuclear fusion.

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3 years ago
A 1.0 kilogram ball is thrown into the air with an initial velocity of 30m/s. How much kinetic energy does the ball have? (B) ho
Gala2k [10]

Answer:

450 joules ; 450 joules ; 45.9 m

Explanation:

Given that :

Initial Velocity, u = 30m/s

Mass, m = 1 kg

Kinetic Energy of ball (KE) = 0.5mu²

K. E = 0.5 * 1 * 30^2

K.E = 0.5 * 900

K.E = 450 Joules

B.) Potential Energy (P. E)

P. E = mgh

At the highest point, all kinetic energy has would have become potential energy, hence

K. E = P. E = 450 Joules

C) Height of the ball :

From ; P. E = mgh

Where ; g = acceleration due to gravity = 9.8m/s² ; h = height

450 = 1 * 9.8 * h

450 = 9.8h

h = 450 / 9.8

h = 45.918

h = 45.9 m

7 0
3 years ago
An octopus propels itself through the water by ejecting water through a funnel in its body. How does this demonstrate Newton’s t
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Answer: The answer would be C. When Octopus eject the water out, the water acts with an equal force on the octopus in opposite direction.

Explanation:

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Hope this helps! :D

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3 years ago
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