One wall of a house being remodeled consists of 0.019 [m] thick plywood, backed by 0.076 [mm] thick insulation. The temperature at the inside surface is 25.0 [0C], while the temperate at the outside surface is 4.0 [0C], both being constant. The thermal conductivities of the insulation and plywood are, respectively, 0.03 and 0.08 [J/(s. m.0C)], and the area of the wall is 35 [m2]. Find the heat conducted through the wall in one hour and express the final answer in the British Units.

A23 kg log of wood begins from rest, 300 m up a sluice (a water track used to transport logs, think of it as an inclined plane with negligible friction) inclined at 20° to the horizontal. after it reaches the flat waterway at the bottom it collides elastically with a 100 kg block of wood initially at rest near the base of the incline. (a) how long does it take the 23 kg log to travel down the incline? (b) what is the speed of the 23 kg log at the bottom of the incline? (c) what are the velocities of both blocks of wood after the collision? (d) what is the total kinetic energy before the collision? (e) what is the kinetic energy of the 23 kg log after the collision? (f) what is the kinetic energy of the 100 kg block of wood after the collision? (g) what is the total kinetic energy after the collision? (h) compare the total initial and total final kinetic energies. is this consistent with what you would expect for elastic collisions? explain!

Classify each possible hypothesis about a medicinal aloe vera plant as falsifiable or non-falsifiable. aloe vera gel is the best natural skin moisturizer. aloe vera gel can heal wounds by boosting cell renewal. aloe vera juice tastes better than carrot juice. drinking aloe juice can reduce the risk of lung cancer.

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.