The main cause of weather is uneven heating of the earth's surface.
There are various factors that contribute to weather, however the main factor is the uneven heating of the earths surface. This creates temperature differences and can cause water to evaporate and condense. This, combined with earth's spin lead to large scale weather systems and wind currents. These in turn are influenced by land forms, bodies of water, and even vegetation.
Answer:
denisity = 52.33 g/c
Explanation:
Density:

We have that m = 785 and that v = 15 c
.

d = 52.33 
Answer:
Yes, through erosion.
Explanation:
Water, wind, and ice shape earths surface. Water, wind, & ice move sediment to another area this process is called erosion.
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Answer:
The orbital speed of the electron is 2.296 x 10⁶ m/s
Explanation:
Given;
radius of the circular orbit, r = 5.041 × 10⁻¹¹ m
In the Bohr’s model of the hydrogen atom, the velocity of the electron is given as;

where;
h is Planck's constant
m is mass of electron
r is the radius of the circular orbit
n is the energy level of hydrogen in ground state
Substitute in these values and solve for V

Therefore, the orbital speed of the electron is 2.296 x 10⁶ m/s