Aman with his eye level 6 feet above the ground is standing 3 feet away from the base of a 15-foot vertical ladder. if he looks to the top of the ladder, at what angle above the horizontal is he looking? (round your answer to one decimal place.)

The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5. what is the specific heat ratio? show the math steps .

What is similar between metals and suspensions

When you see distant streetlights through smog, they look dimmer and redder than they do normally. but when you see the same streetlights through fog or falling snow, they look dimmer but not redder. use your knowledge of the interstellar medium to discuss the relative sizes of the particles in smog, fog, and snowstorms compared to the wavelength of light.