An acid is any chemical compound which when dissolved in water gives a solution with a hydrogen ion activity greater than in pure water.2<span>A </span>base<span> is an aqueous substance that can accept hydrogen ions.</span>
Answer:
All of those answer are correct.
Answer:

solar wind
The magnetosphere is the region of space surrounding Earth where the dominant magnetic field is the magnetic field of Earth, rather than the magnetic field of interplanetary space. The magnetosphere is formed by the interaction of the solar wind with Earth's magnetic field.
<span>This
is standard procedure. It's easier to focus and locate the specimen
under low power using the coarse adjustment; you get a larger field of
view. Also it's a safety procedure. The high power objective has a
relatively long length and there is a possibility of breaking the glass
coverslip and/or slide if the coarse adjustment is used. Most
microscopes are "bifocal", that is, in switching from low to high power,
the image is nearly in focus with minor adjustment with the fine
adjustment. </span>
