Suppose a 5×150 mm seed drill is to plant 80 kg of wheat per hectare. If the diameter of its drive wheel is 1000 mm, calculate a). The width of the seed drill; b. The length of travel necessary for the drill to cover 0.1 ha; c. The number of wheel revolutions to cover 0.1 ha; d. The amount of seed that should be delivered from each tube to plant 0.1 ha.

b.transmitters send radio waves, and receivers capture radio waves.

where’s the list ? the question is incomplete

pretty sure it's false

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.