Which of the following is not true about mechanical waves? a they carry energy b they transfer matter c they can be longitudinal d they require a medium

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?

Astep up transformer has 250 turns on its primary and 500 turns on it secondary. when the primary is connected to a 200 v and the secondary is connected to a floodlight that draws 5a, what is the power output? show all of your work.

The record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s