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cricket20 [7]
3 years ago
12

Which statements accurately describe Dmitri Mendeleev’s contributions to the development of the periodic table? Check all that a

pply. Mendeleev wrote the first modern chemistry textbook. Mendeleev produced the first orderly arrangement of known elements. Mendeleev ordered the elements by increasing atomic number. Mendeleev used patterns to predict undiscovered elements. Mendeleev accounted for variations resulting from isotopes.
Physics
2 answers:
Sergio039 [100]3 years ago
8 0

For edgen its B and D

Levart [38]3 years ago
6 0
He produced the first orderly arrangement of known elements, he used patterns to predict undiscovered elements
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Answer:

113.58 m

Explanation:

Range = Maximum Height

\frac{u^{2}Sin2\theta }{g}=\frac{u^{2}Sin^{2}\theta }{2g}

tan θ = 4

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Let u be the velocity of projection

K = 1/2 x m x u^2

1150 = 0.5 x 0.97 x u^2

u = 48.7 m/s

Range = [tex]\frac{u^{2}Sin2\theta }{g}

R = (48.7 x 48.7 x 2 x Sin 76 x Cos 76) / 9.8 = 113.58 m

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How many seconds did it take (after starting his descent) for the worker to hit the ground? Answer in units of s.
elena-14-01-66 [18.8K]

Answer:

This question is incomplete

Explanation:

The question is incomplete. However, to determine the time (in seconds) it took a worker to hit the ground from an elevated point. The speed the worker was coming with to the ground and the distance between the elevated point and the ground will have to be considered. Thus the formula to be used here will be

Speed (in meter per second) = distance (in meters) ÷ time (in seconds)

time (in seconds) = distance (in meters) ÷ speed (in meter per seconds)

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Answer:

C. Dark Matter

Explanation:

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