Is atmosphere pressure at high altitudes is less than the pressure at ground, true or false

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

Two thin 80.0- cm rods are oriented at right angles to each other. each rod has one end at the origin of the coordinates, and one of them extends along the x- axis while the other extends along the yaxis. the rod along the x- axis carries a charge of - 15.0 μ c distributed uniformly along its length, and the other rod carries 15.0 μ c uniformly over its length. find the magnitude and direction of the net electrical force that these two rods exert on an electron located at the point (40.0 cm, 40.0 cm). (e

Which is not true about oxygen-17 and oxygen-18?