What are groups 1,2 and 3 examples of on the periodic table

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?