By loud noise, mostly from concerts.
-- "Tesla" is a unit for the strength of a magnetic field.
The Earth's magnetic field at the surface ... the one that makes
compasses work ... averages roughly 45 microteslas.
So 1 Tesla = somewhere around 20,000 times the magnitude
of Earth's magnetic field at the surface.
There's a smaller, more convenient unit, called the 'Gauss'.
1 Tesla = 10,000 Gauss. The Earth's magnetic field ranges
between 0.25 to 0.65 Gauss at various places on the surface.
-- Newton is a unit of force, equal to about 3.6 ounces.
1 pound of force is about 4.45 newtons.
Answer:
i.4.4m/s
ii.5.8m/s
III.5.98m/s
Explanation:
Given Y=70t-16t^2 at t=2
Y= 70(2)-16(2)^2=76m/s
i.at 0.1sec=2.1secs
Y=70(2.1)-16(2.1)^2=76.44m/s
Velocity (76.44-76/.1)=4.4m/s
ii.at t=0.01secs
Y=70(2.01)-16(2.01)^2=76.058m/s
Velocity=(76.056-76/.01)=5.8m/s
ii.at t=0.001
Y=70(2.001)-16(2.001)^2=76.0059m/s
Velocity=(76.0059-76/.001)=5.98m/s