The total charge that an automobile battery can supply without being recharged is given in terms of ampere-hours. a typical 12-v battery has a rating of 49 a · h . suppose you forget to turn off the headlights in your parked automobile. if each of the two headlights draws 3.5 a , find out the time before your battery is “dead”. answer in units of hours. answer in units of h

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic

conservation of mass

mass before something happens = mass afterwards

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.