A certain 100 W tungsten filament lamp operates at a temperature of 1500^oC. Assuming that it behaves as a perfect black body, estimate the surface area of the filament. [ Stefan-Boltzmann constant, = 5.67 10^-8 W m^-2 K^-4]

a.

1.78 10^-4 m²

b.

1.36 10^-4 m²

c.

1.52 10^-4 m²

d.

2.00 10^-4 m²

A motor bike traveling in a straight line had an initial velocity (u) of (50.06 0.01) m s^-1 when timing began. If its acceleration (a) is (7.086 0.002) m s^-2, what is its final velocity (v) when the time (t) is (5.00 0.01) s? These quantities are related by the following equation:

v = u + at

a.

84.2 m s^-1

b.

85.5 m s^-1

c.

82.3 m s^-1

d.

86.0 m s^-1

What is the absolute error in v?

Determine the fractional error in v.

What is the percentage error in v?