The changes in the direction of a current flow in a system using alternating current are based on the of the system A. voltage
B. frequency
C. amperage
D. phase

If you touch a hot light bulb and get burned, that is an example of a. radiation b. convection c. conduction

The plum pudding model of the atom state that ?

The x-coordinate of a particle in curvilinear motion is given by x = 3.1t3 - 4.9t where x is in feet and t is in seconds. the y-component of acceleration in feet per second squared is given by ay = 2.3t. if the particle has y-components y = 0 and vy = 5.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 1.8 sec. sketch the path for the first 1.8 seconds of motion, and show the velocity and acceleration vectors for t = 1.8 sec. answers: v = ft/sec a = ft/sec2