A hydrogen gas lamp emits a red wavelength at 656 nm and a violet wavelength at 434 nm. The light from the lamp is put through two slits. The slit separation is 0.120 mm, and the distance to the screen is 55.0 cm. What is the distance between the second red minima and the second minima?

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

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?