الطاقة الحرارية المطلوبة ل 4.3غم من الماء السائل عند نقطة الانصهار لرفعها الى درجة الغليان بدون. الغليان تساوي 1.8*10^3

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

(a) if the pressure in gas is doubled while its volume is held constant, by what factor do (i) vrms and (ii) change? (b) is it possible to boil water at room temperature (20oc) without heating it? explain.

Aswimmer is determined to cross a river that flows due south with a strong current. initially, the swimmer is on the west bank desiring to reach a camp directly across the river on the opposite bank. in which direction shoud the swimmer head? a. the swimmer should swim southeast. b. the swimmer should swim south. c. the swimmer shuold swim northeast. d. the swimmer should swim due north. e. the swimmer should swim due east.