ball A is dropped from a hot air balloon rising at a costant velocity of 14,7 m. s'1 at a height of 19,7 m above the ground. the ball took 1.5s to reach its maximum height and hits the ground after some time in air. ignore the effects of air resistanceUse the ground as zero reference.3.1.1calculate the maximum height reached by the ball above the ground​

Which describe reflection? check all that apply. light bounces off a boundary.

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

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