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3 years ago

Until about 200 million years ago, Earth's continents were joined as a single land mass called

Biology

2 answers:

coldgirl [10]3 years ago

8 0

The answer is B. Pangaea

nirvana33 [79]3 years ago

6 0

The answer will be B.Pangaea

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A planet has a mass of 5.97 x 1024 kg and a radius of 6.38 x 106 m. Find the weight of a 65.0 kg person at 1000 km above the sur

mote1985 [20]

Answer: The weight of the person above the surface of a planet is 635.83N.

Explanation:

To calculate the weight of a person, we use the formula:

$w=mg$ ....(1)

where,

w = weight of an object

m = mass of the person = 65kg

g = acceleration due to the gravity of the planet

For the calculation of weight, we need to first find the acceleration due to gravity and for that we use the formula:

$g=\frac{GM}{r^2}$

where, g = acceleration due to gravity = $?m/s^2$

G = Universal gravitational constant = $6.67\times 10^{-11}Nm^2/kg^2$

M = mass of the planet = $5.97\times 10^{24}kg$

r = distance of the person from the planet = $6.38\times 10^6m$

Putting values in above equation, we get:

$g=\frac{(6.67\times 10^{-11}kgm/s^2.m^2/kg^2)(5.97\times 10^{24}kg)}{(6.38\times 10^6m)^2}\\\\g=9.782m/s^2$

Putting this value in equation 1, we get:

$w=65kg\times 9.782m/s^2=635.83N$

Hence, the weight of the person above the surface of a planet is 635.83N.

7 0

3 years ago

On a Pangia map which fossils occur on most landmasses

Pani-rosa [81]

You spelled Pangaea wrong and it is the Glossopteris fossils that occur

5 0

3 years ago

Which RNA nucleotide is complementary to adenine?

Yakvenalex [24]

Answer:

It would be uracil

Explanation:

RNA base pairs:

A - U

G - C

5 0

3 years ago

Read 2 more answers

Identify two means by which meiosis results in genetically unique gametes, and explain why this is important.

Rashid [163]

Explanation:

Meiosis is beneficial as it produces gametes that are genetically different to the parent cell, and when the gametes combine the offspring produced is made from combination of genes from both mother and father. The offspring is genetically unique, there is no other organism on the Earth with the exact same DNA sequences on their chromosomes.

8 0

3 years ago

Are the basic building blocks of all living organisms.

velikii [3]

Cells, is the answer.

4 0

3 years ago