A woman can read the large print in a newspaper only when it is at a distance of 65 cm or more from her eyes.

(a) Is she nearsighted (myopic) or farsighted (hyperopic), and what kind of lens is used in her glasses to correct her eyesight?
(b) What should be the refractive power (in diopters) of her glasses (worn 1.7 cm from the eyes), so she can read the newspaper at a distance of 25 cm from the eyes?

Rohit is trying to tune an instrument

If the new moon happens on january 15th, what shape will it be on february 6th?

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.