The scientist that described an atom made a solid positively charged substance with electrons dispersed throughout it was: Ernest Rutherford
In 1911 Ernest Rutherford proposed his atomic model in which he considered the atom as a positively, densely charged center called a nucleus in which the electrons circulate around the core with a negative charge.
<h3>What is an atom?</h3>
The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.
Learn more about the atom at: brainly.com/question/17545314
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That's true. Light can travel through glass, water or jello,
but it also gets here very effectively through empty space,
from the sun and stars.
The formula for the time is Time = (speed) / (acceleration) .
If it slows 4 m/s every second, it takes (24/4) = <u>6 seconds</u> to slow from 24 to zero.
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If the speed at the beginning or end of the acceleration is zero, then the formula
for distance during acceleration is D = 1/2 (acceleration) (time)² .
1/2 (acceleration) x (time)² = 1/2 (4) (6)² = 1/2 (4) (36) = <u>72 meters</u>.
Answer:
-4.37 * 10^(-18) J
Explanation:
Parameters given:
Charge of a proton, Qp = 1.6022 * 10^(-19) C
Charge of an electron, Qe = -1.6022 * 10^(-19) C
Distance between proton and electron, d = 0.529 × 10^(−10) m
The amount of work done is given as:
W = F * d
Where F = electrostatic force
d = distance between them
Electrostatic force is given as:
F = (k * Qp * Qe) / d²
F = (9 * 10^9 * 1.6022 * 10^(-19) * -1.6022 * 10^(-19)) / (0.529 × 10^(−10))²
F = -8.26 * 10^(-8) N
Work done will be:
W = -8.26 * 10^(-8) * 0.529 × 10^(−10)
W = -4.37 * 10^(-18) J
Answer:9m
Explanation:
Ball starts from rest . Time taken = 6 seconds. Distance travelled by ball. ∴Distance travelled = 9 m
Hope it helps you
Good luck