When the battery on your camera is low, the battery indicator light will alert you so you can remove the battery and charge it again when it runs out. A. True B. False

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

It is really hard for me right know

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