Answer:
ΔW = 1.168 × 10 ⁻²⁰ Joule
Explanation:
Given:
Change in Electric potential Δ V=Vout - Vin=0.073 V
Charge on sodium ions q = 1.6 ×10 ⁻¹⁹ C (+ve because of Missing one electron)
Work done by the electric fore when a sodium ions moves from outside to inside the cell is the change in the Electric potential energy Uout -Uin = ΔU
we have
ΔW =ΔU = q ΔV
ΔW = 1.6 ×10 ⁻¹⁹ C × 0.073 V
ΔW = 1.168 × 10 ⁻²⁰ Joule
Answer:
r = 5.94 10⁻² m
Explanation:
The magnetic force is given by the ratio
F =q v x B
The bold indicate vectors and the vector product determines that the force is perpendicular to the other two vectors, so the modulus of the velocity does not change, but its direction, therefore the acceleration in Newton's second law is centripetal
F = m a
The magnitude of the force is
F = q v B sin θ
The centripetal acceleration is
a = v² / r
Let's replace
q v B sin θ = m v² / r
r = m v / (q B sin θ)
Let's calculate
r = 9.11 10⁻³¹ 4.8 10⁶ / (1.60 10⁻¹⁹ 9.2 10⁻⁴ sin 30)
r = 5.94 10⁻² m
Answer:
rain is water because it's a liquid
Answer:
Please find detailed explanation of second class levers below
Explanation:
Levers are one of the classes of machine that possesses three levels namely: first class, second class and third claas. A second class lever is the level of levers in which the load (L) is in between the pivot (F) and the effort (E).
Examples of second class levers include; wheelbarrow, a bottle opener etc. In the bottle opener for example, the bottle lid (load) is in between the pivot of the opener and the hand opening it (effort).
One Astronomical Unit is the distance between the Earth and the Sun, this acts as a sort of a cosmic metre stick. Astronomers don't and cannot measure distances. Distances are merely inferred from what actually has been measured, such as an angle, a relative luminosity, a time period
