Who invented the telephone?

thomas edison

the wright brothers

alexander graham bell

henry ford

Most energy in an ecosystem comes originally from_

Awheel rotates without friction about a stationary horizontal axis at the center of the wheel. a constant tangential force equal to 82.0 n is applied to the rim of the wheel. the wheel has radius 0.150 m . starting from rest, the wheel has an angular speed of 12.8 rev/s after 3.88 s. what is the moment of inertia of the wheel?

Which of the following is not an appropriate unit for acceleration? (kg/12 mihr? m/min/sec cm/30c?