The magnitude of the average emf induced in the loop is given by (we ignore the signs since we are interested only in the magnitude)
where
is the variation of magnetic flux through the area enclosed by the loop, and
is the time interval.
The magnetic flux is given by
where B is the intensity of the magnetic field, A is the area enclosed by the loop and
is the angle between the perpendicular to the area and the magnetic field. In our problem, this angle is zero because the loop is perpendicular to the magnetic field, so the cosine is 1. The area of the loop is fixed, and it is
where
is the radius of the loop. The only element which is variable in the formula is B, which changes from 0.069 T to -0.044 T (opposite direction). So we can rewrite the flux variation as
where
By using
, we can find the magnitude of the emf induced:
Density - the mass of a substance per unit volume
Matter - anything that has mass and occupies space
Control standard - a quantity that remains unchanged
Meter - metric unit of length
hypothesis - a proposed explanation for a scientific problem
kilogram - metric unit of mass
Answer:
C. Pulmonary endurance
Explanation:
I'm pretty sure it's "C" because cardiovascular and pulmonary endurance are the same thing and usually you'd hear cardiovascular more than pulmonary.
Sorry if I'm wrong!