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3 years ago

Help me please I will thank you

Physics

1 answer:

Degger [83]3 years ago

3 0

Answer:

DNA= 2 strands, sugar is deoxyribose, and the Nitrogen Bases are adenine, uracil, cytosine, and thymine.

RNA= 1 strands, sugar is ribose, and the Nitrogen Nases are adenine, uracil, cytosine, and guanine.

Hope this helps :)

Explanation:

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3 years ago

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Which of the following statements is true?

kupik [55]

Answer:

2. The hydrogen atom has quantized energy levels.

Explanation:

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3 years ago

A rock is dropped from a distance RE above the surface of the earth, and is observed to have kinetic energy K1 when it hits the

goblinko [34]

Answer:

$\dfrac{K_2}{K_1}=\dfrac{4}{3}$

Explanation:

When an object strikes the ground, the potential energy of the rock gets converted to the kinetic energy.

A rock is dropped from a distance $R_e$ above the surface of the earth and is observed to have kinetic energy $K_1$ when it hits the ground.

For another rock, It is dropped from twice the height $2R_e$ above the earth’s surface and has kinetic energy $K_2$ when it hits.

For the first rock, $K_1=GMm(\dfrac{1}{R_e}-\dfrac{1}{2R_e})=\dfrac{GMm}{2R_e}$ ..............(1)

For the second rock, $K_2=GMm(\dfrac{1}{R_e}-\dfrac{1}{3R_e})=\dfrac{2GMm}{3R_e}$ ..............(2)

Dividing equation (2) by (1) we get :

$\dfrac{K_2}{K_1}=\dfrac{4}{3}$

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3 years ago

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mafiozo [28]

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Answer:

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Solution:

As per the question:

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