Answer:
a. The cool must have an area of 17.892m^2
b. The maximum translational speed of a point on the coil as it rotates is 7.499m/s.
Explanation:
Given:
Emax = 9.0V = Ep
Maximum number of turns the coil can have (N) = 2000
Earth magnetic field (B) = 8 × 10^-5T
1. Area(m^2) = ?
Using the formula
A = Ep/NπB
= 9.0/(2000 x π x 8 × 10^-5)
= 9.0/0.503
A = 17.892m^2
b) maximum translational speed of a point on the coil as it rotates = ?
(Assuming the coil is circular)
Using the formula
v = ωr = π ×2.387m/s
= 7.499m/s.
r is determined by using A = πr^2k
The earth always revolves around the sun, so yes.
I think the answer may be D- mechanical
Answer:
98.4 N
Explanation:
Given that the body weighs 800 N on earth.
Thus,
Weight = mass x acceleration due gravity
i.e W = mg
800 = m x 10
m =
= 80 kg
The mass of the body is 80 kg.
To be able to determine its weight on the planet, we have to first calculate the gravitational pull of the planet.
But,
g =
Where: G is the Newton's universal gravitation, M is the mass of the planet and r is the radius of the planet.
g =
=
= 1.2275
g = 1.23 m/
Thus,
Weight of the body on the planet = mg
= 80 x 1.23
= 98.4 N
The weight of the body on the planet is 98.4 N