Which shows the conversion of 2.09 × 10-4 meters to millimeters?
a.
0.000209 m × 10 mm/m = 0.00209 mm
b.
0.000209 m × 1000 mm/m = 0.209 mm
c.
0.000209 m × 100 mm/m = 0.0209 mm
d.
2.09 m × 1000 mm/m = 2,090 mm

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.

Which type of energy is transferred by convection currents?

Suppose that she pushes on the sphere tangent to its surface with a steady force of f = 40 n and that the pressured water provides a frictionless support. how long will it take her to rotate the sphere one time, starting from rest?