In standard form and units of my choosing, the distance is 10,000 light-years.
Answer:
Electron must be placed at a distance of 2.69 ×10^5 m in the direction of positive y-axis.
Explanation:
Charge on electron = e = -1.6 × 10^-19 C
Mass of electron = m = 9.1 × 10^-31 kg
Charge at origin = q = -0.45 nC
According to given condition in the question:
Fe = Fg
kq1q2/r^2 = mg
(9 × 10^9)( -1.6 × 10^-19)( -0.45n)/r^2 = (9.1 × 10^-31)(9.8)
r = √7.2 ×10^10
r = 2.69 ×10^5 m in the positive y-axis direction
Answer:
The object moves 0.0833 m downwards.
The object moves 8.33 cm downwards.
Explanation:
Weight of object = W = 6 × 9.8 = 58.8 N
Mass of liquid displaced = 3.45 kg
Meaning that buoyant force = Fb = 3.45 × 9.8 = 33.81 N
drag force on the object from the liquid is negligible.
Net force acting on the object = ma
Force balance on the object gives
Net force = W - Fb + D
W = 58.8 N
Fb = 33.81 N
D = 0
Net force = 58.8 - 33.81 = 24.99 N
ma = 24.99
6a = 24.99
a = (24.99/6) = 4.165 m/s²
Now, using one of the equations of motion
u = 0 m/s
a = 4.165 m/s²
y = ?
t = 0.200 s
y = ut + ½at²
y = 0 + (0.5 × 4.165 × 0.2²)
y = 0.0833 m
Since the Weight of the body is more than the buoyant force exerted by the liquid on the object, the object moves downwards.
Hope this Helps!!!
Answer:
The cell will have no electromotive force in it.
Explanation:
The battery provides the chemical energy that produces the force needed to move electron around the circuit and to generate electrical energy.
- electrochemical cells are devices in which chemical reactions produce electric current.
- The electromotive force inherent in a cell provides the driving force for the current to flow.
- Without this force, there would not be enough energy to move the electrons.
Answer:
-3.4 eV ()
Explanation:
In a hydrogen atom, the energy of an electron is given by:
where
n is the principal quantum number
For an electron in the 2s orbital,
n = 2
So substituting this value into the formula, we find
And converting this into Joules, we have