Answer:
19.6N
Explanation:
Given parameters:
Mass of rock = 2kg
Speed = 30m/s
Unknown:
Net force on the rock = ?
Solution:
The net force acting on this rock is a function of the acceleration due to gravity acting upon it.
Net force = weight = mass x acceleration due to gravity
Net force = 2 x 9.8 = 19.6N downward
It changes because force is somewhat like pressure. Force is continuously against the object so as a result, speed changes .
Explanation:
made of metal to divert lightning strikes 2 the ground wire. the ground wire is what protects the surrounding structures from fire, and electrocution, this diverts electricity to the soil where it is neutralized.. without it, leaves livestock, buildings, to catch on fire, kill livestock, and ppl..
Answer:
The energetic order third excited > seconds excited > first excited > ground
Explanation:
Bohr's atomic model includes an integer that is responsible for the quantization of energy
E = - 13.6 /n² eV
Where n is the so-called principal quantum number, it is an integer with values of
n = 1, 2, 3… inf
For n = 1 have the so-called ground state that is the one with the lowest energy, for the minus sign in the formula E1 = -13.6 eV
For n = 2 it is the first excited state has the most energy than the ground state,
E2 = 13.6 / 4 = -3.4eV
For n = 3 we have the second excited state, E3 = -13.6 / 9 = -1.5 eV
For n = 4 we have the third excited state, E4 = -0.85 eV
The energetic order of the states is
E4 > E3 > E2 >E1
