Answer:
It would be a physical change because you aren't changing to chemical properties of the glass, just the shape.
Answer:
Magnitude of the acceleration = 1.90 m/s²
Direction of the acceleration = 65.1° (measured counter clockwisely from the +x axis) or 65.1° north of East
Explanation:
The net force is the vector sum of all the forces acting on the sailboat.
One force is due to the action of the water on the hull of the boat and is directed east and has a magnitude of 1990 N; in vector form, F₁ = (1990j) N
The other force is due to the action of the wind on the sails and is directed northeast with a magnitude of 2440 N; in vector form, F₂ = 2440 [(cos 45°)î + (sin 45°)j] N = 1725î + 1725j) N
Net force = F₁ + F₂ = 1990j + (1725î + 1725j) = (1725î + 3715j) N
According to Newton's law, Net force causes acceleration of A body,
Net force = ma
a = (Net force)/m
a = (1725î + 3715j)/2160 = (0.80î + 1.72j) m/s²
Magnitude of acceleration
/a/ = √[(0.8²) + (1.72²)] = 1.90 m/s²
Direction of the acceleration = tan⁻¹ (1.72/0.8) = 65.1°
Answer:
V' = V/2
Explanation:
The voltage across a parallel plate capacitor is given as follows:
V = Q/C
where,
V = Voltage across capacitor
Q = Charge on Capacitor
C = Capacitance of Capacitor = A∈₀/d
Therefore,
V = Qd/A∈₀
where,
A = Area of plate
d = distance between plates
∈₀ = permittivity of free space
FOR CAPACITOR 1:
Q = Q
d = d
A = A
V = V
Therefore,
V = Qd/A∈₀ --------------- equation (1)
FOR CAPACITOR 2:
V' = ?
Q' = Q
d' = d
A' = 2A
Therefore,
V' = Q'd'/A'∈₀
V' = Qd/2A∈₀
V' = (1/2)(Qd/A∈₀)
using equation (1):
<u>V' = V/2</u>
