Một máy biến áp tăng áp một pha lý tưởng, nếu giữ nguyên hiệu điện thế đầu vào cuộn sơ cấp và tăng số vòng dây của cuộn thứ cấp lên 50 vòng dây thì hiệu điện thế đầu ra của cuộn thứ cấp sẽ *

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray

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.