Acrowbar 28in long is pivoted 6in from the end what force must be applied at the long end in order to lift a 400 lb object at the short end

Newton's law of cooling states that the rate of change in the temperature t(t) of a body is proportional to the difference between the temperature of the medium m(t) and the temperature of the body. that is, startfraction dt over dt endfraction equals upper k left bracket upper m left parenthesis t right parenthesis minus upper t left parenthesis t right parenthesis right bracket , where k is a constant. let kequals0.04 left parenthesis min right parenthesis superscript negative 1 and the temperature of the medium be constant, m(t) font size decreased by 3 equivalent font size decreased by 3 294 kelvins. if the body is initially at 369 kelvins, use euler's method with hequals0.1 min to approximate the temperature of the body after (a) 30 minutes and (b) 60 minutes.

You have 80 g of 60oc water and 80 g or 10oc water. what is the final temperature when the two are mixed? explain.

Explain how the absorption of sound waves differs from the transmission of sound waves.