Alfred Wegener believed that all of the continents were originally attached! By looking at the map, you can see that Africa and South America look like they were once joined. This 'super continent' was known as Pangaea. He also found fossils that proved his point.
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Answer:
a)The approximate radius of the nucleus of this atom is 4.656 fermi.
b) The electrostatic force of repulsion between two protons on opposite sides of the diameter of the nucleus is 2.6527
Explanation:
= Constant for all nuclei
r = Radius of the nucleus
A = Number of nucleons
a) Given atomic number of an element = 25
Atomic mass or nucleon number = 52
The approximate radius of the nucleus of this atom is 4.656 fermi.
b)
k= = Coulombs constant
= charges kept at distance 'a' from each other
F = electrostatic force between charges
Force of repulsion between two protons on opposite sides of the diameter
The electrostatic force of repulsion between two protons on opposite sides of the diameter of the nucleus is 2.6527
Work is calculated by multiplying the force exerted with the distance covered by the object. The force and the displacement should be parallel. In this item, we have to calculate first the horizontal component of force.
x-component of force = (26 lbs)(cos 30°)
= 22.52 lbs
Multiplying the calculated value by the displacement of 90 ft will give us the final answer of 2026.50 lb.ft.
Answer:
A
Explanation:
heat energy can be converted into electricity with very high efficiency. .