Which of the following statements about iron filings placed upon glass resting on top of a bar magnet is false? a. the density of the filings will match the intensity of the magnetic field. ield outlined by the filings will be from the north pole of the magnet to the south pole. c. the filings will be clustered more densely where the field is weakest. d. the filings will sit on the glass on curved paths between the north and south poles.

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical

Abasketball star covers 2.65 m horizontally in a jump to dunk the ball. his motion through space can be modeled precisely as that of a particle at his center of mass. his center of mass is at elevation 1.02 m when he leaves the floor. it reaches a maximum height of 1.90 m above the floor and is at elevation 0.910 m when he touches down again. (a) determine his time of flight (his "hang time"). (b) determine his horizontal velocity at the instant of takeoff. (c) determine his vertical velocity at the instant of takeoff. (d) determine his takeoff angle. (e) for comparison, determine the hang time of a whitetail deer making a jump with center-of-mass elevations yi = 1.20 m, ymax = 2.45 m, and yf = 0.750 m.

Determine the net charge of the predominant form of arg at (a) ph 1.0, (b) ph 5.0, (c) ph 10.5, and (d) ph 13.5