Asemi-circle of radius 8 cm, rocks back and forth along a line. the distance between the line on which the semi-circle sits and the line above is 12 cm. as it rocks without slipping, the semi-circle touches the line above at two points. (when the semi-circle hits the line above, it immediately rocks back in the other direction.) what is the distance between these two points, in millimetres, rounded off to the nearest whole number

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

If you wanted to move an electron from the positive to the negative terminal of the battery, how much work w would you need to do on the electron? enter your answer numerically in joules.

Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.