PHIL 338 Lecture 2: Phil 338 Lecture 2

in one cycle, an engine burning a mixture of air and methanol (methyl alcohol) absorbs 538 J and expels 338 J. What is the engine's efficiency?

338 g of water at 100°C is added toice at 0°C. If the finaltemperature of the system (which youcan assume is isolated) is 0°C,determine how much ice melted.The specific heat of water is 4186J/kg·°C. The latentheat of fusion for H₂O is 335,000J/kg.
__________ kg

A student uses a force of 24.1 Newtons to push on a 338 gram massto compress a
spring a horizontal spring a distance of 11.5 centimeters. When thestudent lets
go of the mass, the spring uncompresses and shoots the mass awayfrom it.
a) How fast does the mass leave the spring?
b) The spring mass slides along a frictionless surface until itcomes to a
frictionless incline. How high does it move up the incline.