1. Which type of galaxy is the Milky Way? (Points : 1). elliptical. . spiral. . irregular. . satellite. . . 2. In which part of
2 answers:
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Answer:
Explanation:
distance between ship A and B = 32 mile
Ship A velocity in south, dx/dt = -16 mph
Ship B is sailing toward east with speed, dy/st = 12 mph
time = 1 hour
rate of change of distance between them = ?
x be the distance travel after t time
X = 32 + x
Let distance between them be z
now, using Pythagoras theorem to calculate distance between ships after 1 hours
z² = x² + y²
z² = (32 + x)² + 12²
z² = (32 - 16)² + 12²
z = √400
z = 20 miles
now, calculation of rate of change of distnace
z² = (32 + x)² + y²
differentiating both side w.r.t. time
hence, the rate is the distance between them changing at the end of 1 hour is equal to
Answer:
The mmf required is ×
A
Explanation:
The Magnetomotive force (mmf) is given by the formula below
where is the Magnetomotive force (mmf)
is the Magnetic field strength
is the magnetic length
The magnetic permeability μ is given by
μ =
Where is the Magnetic flux density
and is the Magnetic field strength
From the question,
= 1.2Wb/m^2
μ = 1600m
From μ =
∴μ
×
A/m
Now, for the Magnetomotive force (mmf)
From the question
= 1.5 m
∴ ×
×
×
Hence, The mmf required is ×
A