In a ballistic pendulum setup designed to find the muzzle velocity of a bullet, the bullet is fired at point blank range into a block and the system moves through a vertical height before coming to rest. For this experiment, take the mass of the bullet to be 0.100 kg and the mass of the block to be 4.9 kg. When the bullet is fired and embeds in the block, together they rise through a vertical height of 0.50 meters. Required:
a. Find the speed of the block/bullet system immediately after impact.
b. Find the initial speed of the bullet.

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach

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.

i think the answer is bone