Heyo :D
The answer should be "foci"
The sun is located at one of the two "foci" in the shape of the earth's orbital path.
Answer
given,
number of turns, N = 400 turns
mean radius, R = 6 cm
Current, I = 0.25 A
relative permeability, K_m = 80
a) Magnetic field in the core
B = 2.67 x 10⁻² T
b) the amount of magnetic field due to atomic current
B = 2.63 x 10⁻² T
Answer:
Explanation:
First we must find the real power that is dissipating for each of the two cases, this is achieved by multiplying the nominal power by the efficiency
P=Poη
P=power
Po=nominal power
η=efficiency
POWER NUMBER 1
P1=400*0.89=356W
POWER NUMBER 2
P2=400*0.94=376W
then we find the power change by subtracting both results
ΔP=P2-P1=376-356=20W
always ensure that the efficiency in any system is maximized, because it is always required that the amount of energy delivered by the system is maximum with the same input power.
Explanation:
1. Distance, d = 5 m
Time, t = 10 s
Speed = distance/time
2. Mass, m = 10 kg
Acceleration, a = 3 m/s³
Force, F = mass (m) × acceleration (a)
F = 10 × 3
= 20 N
3. Mass, m = 7 kg
Height, h = 4 m
Potential energy, E = mgh
E = 7 × 9.8 × 4
E = 274.4 J
Hence, this is the required solution.