4 years ago

About 300 B.C., Aristarchus suggested that the sun was at the center of the universe. Why?

1 answer:

7 0

The correct answer is option A and B

About 300 B.C., Aristarchus suggested that the sun was at the center of the universe because a) the brightness of the planets would change and b) the planets appeared to move among the constellations.

18 centuries before Copernicus, Aristarchus predicted that all planets orbit the sun. In other words, he suggested the Solar System is heliocentric.

You might be interested in

Radiation, Chemical agents and Viruses.

zmey [24]

Radiation, Chemical agents and viruses may all cause C. Generic Mutations.

7 0

3 years ago

Read 2 more answers

Suppose an aluminum- nuclide transforms into a phosphorus- nuclide by absorbing an alpha particle and emitting a neutron. Comple

AfilCa [17]

Explanation:

An alpha particles is basically a helium nucleus and it contains 2 protons and 2 neutrons.

Symbol of an alpha particle is $^{4}_{2}\alpha$ . Whereas a neutron is represented by a symbol $^{1}_{0}n$ , that is, it has zero protons and only 1 neutron.

Therefore, reaction equation when an aluminum- nuclide transforms into a phosphorus- nuclide by absorbing an alpha particle and emitting a neutron is as follows.

$^{27}_{13}Al + ^{1}_{0}n \rightarrow ^{30}_{15}P + ^{1}_{0}n$

5 0

3 years ago

What was Anton van Lee

solniwko [45]

I would say the answer is A.

5 0

3 years ago

What is the difference between a theory and a scientific law?

Westkost [7]

Scientific laws and theories have different jobs to do. A scientific law predicts the results of certain initial conditions. ... In contrast, a theory tries to provide the most logical explanation about why things happen as they do.

6 0

3 years ago

Read 2 more answers

Many organisms in an ecosystem copete with each other for resources. What might different species of trees in a forest ecosystem

sineoko [7]

Territory and energy sources

4 0

3 years ago

Read 2 more answers