Green light has higher refractive index than orange light for the same material medium. explain

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

Could we see a galaxy that is 20 billion light-years away?

Avertical clean glass piezometer tube has an inside diameter of d = 1 mm and is used to measure pressure in a horizontal pipe carrying water as shown. due to pressure in the pipe, the water at 20c rises into the tube to a height h. if the water pressure in the pipe is p = 500 pa gauge, estimate the height h: (a) without considering surface tension (b) with surface tension (capillary) effects. the contact angle  can be assumed at 30 deg