How fast is a 0.50 kg ball moving if it's kinetic energy is 400 j

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.

Another word for electromagnetic energy is a. heat b. force c. matter d. radiation

Which of the following is not an appropriate unit for acceleration? (kg/12 mihr? m/min/sec cm/30c?