Scientific theories
result from observations and experiments and might change
result from observations and experiments but cannot change
come only from the beliefs of scientists and might change
come only from the beliefs of scientists and cannot change

Awind turbine is initially spinning at a constant angular speed. as the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.173 rad/s2. after making 2870 revolutions, its angular speed is 132 rad/s. (a) what is the initial angular velocity of the turbine? (b) how much time elapses while the turbine is speeding up?

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.