Gravitational potential energy is caused when an object is resting above the ground. It is released when the object is falling, not by burning substances.
Speed is distance over time so, 30/15=2.
Because it slows down, the acceleration is negative so B. -2m/s2
So I'm guessing that the question is describing your experiences in both these classes? Nobody else knows how you experienced these classes because it was your experience, not mine or anyone else's. You'll have to explain how you felt about the class, and whether it was difficult or not, etc.
Answer: 3978 pF
Explanation:
Capacitance can be defined as ability to store charge. It is the ratio of charge over electric potential.

where, A is the area of the plates and d is the distance between plates forming the capacitor.
diameter of the plates, di = 15 cm =0.15 m
radius of the plate, r = di/2 = 0.075 m
Area of the plates, A = πr² = 0.018 m²
Distance between the plates, d = 0.04 mm = 0.00004 m
Permittivity, ∈₀ = 8.84 × 10⁻¹² F/m
Capacitance, 